[INFO] fetching crate rustc-ap-serialize 625.0.0...
[INFO] checking rustc-ap-serialize-625.0.0 against nightly-2019-10-27 for pr-65897
[INFO] extracting crate rustc-ap-serialize 625.0.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate rustc-ap-serialize 625.0.0 on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rustc-ap-serialize 625.0.0
[INFO] finished tweaking crates.io crate rustc-ap-serialize 625.0.0
[INFO] tweaked toml for crates.io crate rustc-ap-serialize 625.0.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0763b86e1116bbfe8d6f8b0eefa4cc141c1d4fc606b2fceb9fb1cb9d1d6ebf56
[INFO] running `"docker" "start" "-a" "0763b86e1116bbfe8d6f8b0eefa4cc141c1d4fc606b2fceb9fb1cb9d1d6ebf56"`
[INFO] [stderr]     Checking smallvec v0.6.11
[INFO] [stderr]     Checking rustc-ap-serialize v625.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/leb128.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate serialize as rustc_serialize;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/leb128.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rustc_serialize::leb128::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |                 $write_fn_name(&mut stream, (3u64 << x) as $int_ty);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 26 | impl_test_unsigned_leb128!(test_u16_leb128, write_u16_leb128, read_u16_leb128, u16);
[INFO] [stderr]    | ------------------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:17:44
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 let (actual, bytes_read) = $read_fn_name(&stream[position ..]);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 26 | impl_test_unsigned_leb128!(test_u16_leb128, write_u16_leb128, read_u16_leb128, u16);
[INFO] [stderr]    | ------------------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |                 $write_fn_name(&mut stream, (3u64 << x) as $int_ty);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 27 | impl_test_unsigned_leb128!(test_u32_leb128, write_u32_leb128, read_u32_leb128, u32);
[INFO] [stderr]    | ------------------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:17:44
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 let (actual, bytes_read) = $read_fn_name(&stream[position ..]);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 27 | impl_test_unsigned_leb128!(test_u32_leb128, write_u32_leb128, read_u32_leb128, u32);
[INFO] [stderr]    | ------------------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |                 $write_fn_name(&mut stream, (3u64 << x) as $int_ty);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 | impl_test_unsigned_leb128!(test_u64_leb128, write_u64_leb128, read_u64_leb128, u64);
[INFO] [stderr]    | ------------------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:17:44
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 let (actual, bytes_read) = $read_fn_name(&stream[position ..]);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 28 | impl_test_unsigned_leb128!(test_u64_leb128, write_u64_leb128, read_u64_leb128, u64);
[INFO] [stderr]    | ------------------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |                 $write_fn_name(&mut stream, (3u64 << x) as $int_ty);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 29 | impl_test_unsigned_leb128!(test_u128_leb128, write_u128_leb128, read_u128_leb128, u128);
[INFO] [stderr]    | ---------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:17:44
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 let (actual, bytes_read) = $read_fn_name(&stream[position ..]);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 29 | impl_test_unsigned_leb128!(test_u128_leb128, write_u128_leb128, read_u128_leb128, u128);
[INFO] [stderr]    | ---------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |                 $write_fn_name(&mut stream, (3u64 << x) as $int_ty);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 30 | impl_test_unsigned_leb128!(test_usize_leb128, write_usize_leb128, read_usize_leb128, usize);
[INFO] [stderr]    | -------------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:17:44
[INFO] [stderr]    |
[INFO] [stderr] 17 |                 let (actual, bytes_read) = $read_fn_name(&stream[position ..]);
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 30 | impl_test_unsigned_leb128!(test_usize_leb128, write_usize_leb128, read_usize_leb128, usize);
[INFO] [stderr]    | -------------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/json.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate serialize as rustc_serialize;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         write_signed_leb128(&mut stream, x);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/json.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::{Encodable, Decodable};
[INFO] [stderr]   |                       ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/json.rs:5:34
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::{Encodable, Decodable};
[INFO] [stderr]   |                                  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/json.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rustc_serialize::json;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/json.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use json::Json::*;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/json.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use json::ErrorCode::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/json.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use json::ParserError::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use json::DecoderError::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use json::JsonEvent::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
[INFO] [stderr]    |            ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:12:18
[INFO] [stderr]    |
[INFO] [stderr] 12 | use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
[INFO] [stderr]    |                  ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/leb128.rs:41:35
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let (value, bytes_read) = read_signed_leb128(&mut stream, pos);
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:12:28
[INFO] [stderr]    |
[INFO] [stderr] 12 | use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
[INFO] [stderr]    |                            ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:12:42
[INFO] [stderr]    |
[INFO] [stderr] 12 | use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
[INFO] [stderr]    |                                          ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:12:56
[INFO] [stderr]    |
[INFO] [stderr] 12 | use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
[INFO] [stderr]    |                                                        ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:12:67
[INFO] [stderr]    |
[INFO] [stderr] 12 | use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
[INFO] [stderr]    |                                                                   ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:12:75
[INFO] [stderr]    |
[INFO] [stderr] 12 | use json::{Json, from_str, DecodeResult, DecoderError, JsonEvent, Parser, StackElement,
[INFO] [stderr]    |                                                                           ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |            Decoder, Encoder, EncoderError};
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 |            Decoder, Encoder, EncoderError};
[INFO] [stderr]    |                     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:13:30
[INFO] [stderr]    |
[INFO] [stderr] 13 |            Decoder, Encoder, EncoderError};
[INFO] [stderr]    |                              ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:66:40
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn mk_object(items: &[(string::String, Json)]) -> Json {
[INFO] [stderr]    |                                        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:66:51
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn mk_object(items: &[(string::String, Json)]) -> Json {
[INFO] [stderr]    |                                                   ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/opaque.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate serialize as rustc_serialize;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     Object(d)
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:643:62
[INFO] [stderr]     |
[INFO] [stderr] 643 | fn check_err<T: Decodable>(to_parse: &'static str, expected: DecoderError) {
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:643:17
[INFO] [stderr]     |
[INFO] [stderr] 643 | fn check_err<T: Decodable>(to_parse: &'static str, expected: DecoderError) {
[INFO] [stderr]     |                 ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:644:38
[INFO] [stderr]     |
[INFO] [stderr] 644 |     let res: DecodeResult<T> = match from_str(to_parse) {
[INFO] [stderr]     |                                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:645:23
[INFO] [stderr]     |
[INFO] [stderr] 645 |         Err(e) => Err(ParseError(e)),
[INFO] [stderr]     |                       ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:646:21
[INFO] [stderr]     |
[INFO] [stderr] 646 |         Ok(json) => Decodable::decode(&mut Decoder::new(json))
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:646:44
[INFO] [stderr]     |
[INFO] [stderr] 646 |         Ok(json) => Decodable::decode(&mut Decoder::new(json))
[INFO] [stderr]     |                                            ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:644:14
[INFO] [stderr]     |
[INFO] [stderr] 644 |     let res: DecodeResult<T> = match from_str(to_parse) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:651:13
[INFO] [stderr]     |
[INFO] [stderr] 651 |         Err(ParseError(e)) => panic!("`{:?}` is not valid json: {:?}",
[INFO] [stderr]     |             ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/opaque.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::{Encodable, Decodable};
[INFO] [stderr]   |                       ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/opaque.rs:5:34
[INFO] [stderr]   |
[INFO] [stderr] 5 | use rustc_serialize::{Encodable, Decodable};
[INFO] [stderr]   |                                  ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:976:40
[INFO] [stderr]     |
[INFO] [stderr] 976 |                         expected: Vec<(JsonEvent, Vec<StackElement<'_>>)>) {
[INFO] [stderr]     |                                        ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/opaque.rs:6:31
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rustc_serialize::opaque::{Encoder, Decoder};
[INFO] [stderr]   |                               ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:976:55
[INFO] [stderr]     |
[INFO] [stderr] 976 |                         expected: Vec<(JsonEvent, Vec<StackElement<'_>>)>) {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/opaque.rs:6:40
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rustc_serialize::opaque::{Encoder, Decoder};
[INFO] [stderr]   |                                        ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:33:24
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn check_round_trip<T: Encodable + Decodable + PartialEq + Debug>(values: Vec<T>) {
[INFO] [stderr]    |                        ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:977:22
[INFO] [stderr]     |
[INFO] [stderr] 977 |     let mut parser = Parser::new(src.chars());
[INFO] [stderr]     |                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1019:29
[INFO] [stderr]      |
[INFO] [stderr] 1019 | fn last_event(src: &str) -> JsonEvent {
[INFO] [stderr]      |                             ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1020:22
[INFO] [stderr]      |
[INFO] [stderr] 1020 |     let mut parser = Parser::new(src.chars());
[INFO] [stderr]      |                      ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1021:19
[INFO] [stderr]      |
[INFO] [stderr] 1021 |     let mut evt = NullValue;
[INFO] [stderr]      |                   ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 | #[derive(RustcDecodable, Eq, PartialEq, Debug)]
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:29:27
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let obj: OptionData = json::decode(s).unwrap();
[INFO] [stderr]    |                           ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:36:27
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let obj: OptionData = json::decode(s).unwrap();
[INFO] [stderr]    |                           ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:43:29
[INFO] [stderr]    |
[INFO] [stderr] 43 | ...                   ExpectedError("Number".to_string(), "[]".to_string()));
[INFO] [stderr]    |                       ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:33:36
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn check_round_trip<T: Encodable + Decodable + PartialEq + Debug>(values: Vec<T>) {
[INFO] [stderr]    |                                    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:45:29
[INFO] [stderr]    |
[INFO] [stderr] 45 | ...                   ExpectedError("Number".to_string(), "false".to_string()));
[INFO] [stderr]    |                       ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:48:37
[INFO] [stderr]    |
[INFO] [stderr] 48 | #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 | #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:54:37
[INFO] [stderr]    |
[INFO] [stderr] 54 | #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:34:23
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let mut encoder = Encoder::new(Vec::new());
[INFO] [stderr]    |                       ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:54:21
[INFO] [stderr]    |
[INFO] [stderr] 54 | #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:61:37
[INFO] [stderr]    |
[INFO] [stderr] 61 | #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
[INFO] [stderr]    |                                     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:61:21
[INFO] [stderr]    |
[INFO] [stderr] 61 | #[derive(PartialEq, RustcEncodable, RustcDecodable, Debug)]
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:81:23
[INFO] [stderr]    |
[INFO] [stderr] 81 |     assert!(s.parse::<Json>().unwrap() == s.parse().unwrap());
[INFO] [stderr]    |                       ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:86:16
[INFO] [stderr]    |
[INFO] [stderr] 86 |     assert_eq!(Null.to_string(), "null");
[INFO] [stderr]    |                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:87:16
[INFO] [stderr]    |
[INFO] [stderr] 87 |     assert_eq!(Null.pretty().to_string(), "null");
[INFO] [stderr]    |                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:92:16
[INFO] [stderr]    |
[INFO] [stderr] 92 |     assert_eq!(U64(0).to_string(), "0");
[INFO] [stderr]    |                ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:93:16
[INFO] [stderr]    |
[INFO] [stderr] 93 |     assert_eq!(U64(0).pretty().to_string(), "0");
[INFO] [stderr]    |                ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:95:16
[INFO] [stderr]    |
[INFO] [stderr] 95 |     assert_eq!(U64(1234).to_string(), "1234");
[INFO] [stderr]    |                ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:96:16
[INFO] [stderr]    |
[INFO] [stderr] 96 |     assert_eq!(U64(1234).pretty().to_string(), "1234");
[INFO] [stderr]    |                ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:98:16
[INFO] [stderr]    |
[INFO] [stderr] 98 |     assert_eq!(I64(-5678).to_string(), "-5678");
[INFO] [stderr]    |                ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:99:16
[INFO] [stderr]    |
[INFO] [stderr] 99 |     assert_eq!(I64(-5678).pretty().to_string(), "-5678");
[INFO] [stderr]    |                ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:101:16
[INFO] [stderr]     |
[INFO] [stderr] 101 |     assert_eq!(U64(7650007200025252000).to_string(), "7650007200025252000");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         Encodable::encode(&value, &mut encoder).unwrap();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:41:23
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let mut decoder = Decoder::new(&data[..], 0);
[INFO] [stderr]    |                       ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:44:23
[INFO] [stderr]    |
[INFO] [stderr] 44 |         let decoded = Decodable::decode(&mut decoder).unwrap();
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/opaque.rs:9:51
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[derive(PartialEq, Clone, Debug, RustcEncodable, RustcDecodable)]
[INFO] [stderr]   |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:102:16
[INFO] [stderr]     |
[INFO] [stderr] 102 |     assert_eq!(U64(7650007200025252000).pretty().to_string(), "7650007200025252000");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]  --> tests/opaque.rs:9:35
[INFO] [stderr]   |
[INFO] [stderr] 9 | #[derive(PartialEq, Clone, Debug, RustcEncodable, RustcDecodable)]
[INFO] [stderr]   |                                   ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]   = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:229:51
[INFO] [stderr]     |
[INFO] [stderr] 229 | #[derive(PartialEq, Clone, Debug, RustcEncodable, RustcDecodable)]
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:107:16
[INFO] [stderr]     |
[INFO] [stderr] 107 |     assert_eq!(F64(3.0).to_string(), "3.0");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:229:35
[INFO] [stderr]     |
[INFO] [stderr] 229 | #[derive(PartialEq, Clone, Debug, RustcEncodable, RustcDecodable)]
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:108:16
[INFO] [stderr]     |
[INFO] [stderr] 108 |     assert_eq!(F64(3.0).pretty().to_string(), "3.0");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:110:16
[INFO] [stderr]     |
[INFO] [stderr] 110 |     assert_eq!(F64(3.1).to_string(), "3.1");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:111:16
[INFO] [stderr]     |
[INFO] [stderr] 111 |     assert_eq!(F64(3.1).pretty().to_string(), "3.1");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:113:16
[INFO] [stderr]     |
[INFO] [stderr] 113 |     assert_eq!(F64(-1.5).to_string(), "-1.5");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:114:16
[INFO] [stderr]     |
[INFO] [stderr] 114 |     assert_eq!(F64(-1.5).pretty().to_string(), "-1.5");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:116:16
[INFO] [stderr]     |
[INFO] [stderr] 116 |     assert_eq!(F64(0.5).to_string(), "0.5");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:117:16
[INFO] [stderr]     |
[INFO] [stderr] 117 |     assert_eq!(F64(0.5).pretty().to_string(), "0.5");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:119:16
[INFO] [stderr]     |
[INFO] [stderr] 119 |     assert_eq!(F64(f64::NAN).to_string(), "null");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:120:16
[INFO] [stderr]     |
[INFO] [stderr] 120 |     assert_eq!(F64(f64::NAN).pretty().to_string(), "null");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:122:16
[INFO] [stderr]     |
[INFO] [stderr] 122 |     assert_eq!(F64(f64::INFINITY).to_string(), "null");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:123:16
[INFO] [stderr]     |
[INFO] [stderr] 123 |     assert_eq!(F64(f64::INFINITY).pretty().to_string(), "null");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:125:16
[INFO] [stderr]     |
[INFO] [stderr] 125 |     assert_eq!(F64(f64::NEG_INFINITY).to_string(), "null");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:126:16
[INFO] [stderr]     |
[INFO] [stderr] 126 |     assert_eq!(F64(f64::NEG_INFINITY).pretty().to_string(), "null");
[INFO] [stderr]     |                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:131:16
[INFO] [stderr]     |
[INFO] [stderr] 131 |     assert_eq!(String("".to_string()).to_string(), "\"\"");
[INFO] [stderr]     |                ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:132:16
[INFO] [stderr]     |
[INFO] [stderr] 132 |     assert_eq!(String("".to_string()).pretty().to_string(), "\"\"");
[INFO] [stderr]     |                ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:134:16
[INFO] [stderr]     |
[INFO] [stderr] 134 |     assert_eq!(String("homura".to_string()).to_string(), "\"homura\"");
[INFO] [stderr]     |                ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:135:16
[INFO] [stderr]     |
[INFO] [stderr] 135 |     assert_eq!(String("madoka".to_string()).pretty().to_string(), "\"madoka\"");
[INFO] [stderr]     |                ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:140:16
[INFO] [stderr]     |
[INFO] [stderr] 140 |     assert_eq!(Boolean(true).to_string(), "true");
[INFO] [stderr]     |                ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:141:16
[INFO] [stderr]     |
[INFO] [stderr] 141 |     assert_eq!(Boolean(true).pretty().to_string(), "true");
[INFO] [stderr]     |                ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:143:16
[INFO] [stderr]     |
[INFO] [stderr] 143 |     assert_eq!(Boolean(false).to_string(), "false");
[INFO] [stderr]     |                ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:144:16
[INFO] [stderr]     |
[INFO] [stderr] 144 |     assert_eq!(Boolean(false).pretty().to_string(), "false");
[INFO] [stderr]     |                ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:149:16
[INFO] [stderr]     |
[INFO] [stderr] 149 |     assert_eq!(Array(vec![]).to_string(), "[]");
[INFO] [stderr]     |                ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:150:16
[INFO] [stderr]     |
[INFO] [stderr] 150 |     assert_eq!(Array(vec![]).pretty().to_string(), "[]");
[INFO] [stderr]     |                ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:152:16
[INFO] [stderr]     |
[INFO] [stderr] 152 |     assert_eq!(Array(vec![Boolean(true)]).to_string(), "[true]");
[INFO] [stderr]     |                ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:152:27
[INFO] [stderr]     |
[INFO] [stderr] 152 |     assert_eq!(Array(vec![Boolean(true)]).to_string(), "[true]");
[INFO] [stderr]     |                           ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |         Array(vec![Boolean(true)]).pretty().to_string(),
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:154:20
[INFO] [stderr]     |
[INFO] [stderr] 154 |         Array(vec![Boolean(true)]).pretty().to_string(),
[INFO] [stderr]     |                    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:161:27
[INFO] [stderr]     |
[INFO] [stderr] 161 |     let long_test_array = Array(vec![
[INFO] [stderr]     |                           ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:162:9
[INFO] [stderr]     |
[INFO] [stderr] 162 |         Boolean(false),
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:163:9
[INFO] [stderr]     |
[INFO] [stderr] 163 |         Null,
[INFO] [stderr]     |         ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:164:9
[INFO] [stderr]     |
[INFO] [stderr] 164 |         Array(vec![String("foo\nbar".to_string()), F64(3.5)])]);
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:164:20
[INFO] [stderr]     |
[INFO] [stderr] 164 |         Array(vec![String("foo\nbar".to_string()), F64(3.5)])]);
[INFO] [stderr]     |                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:164:52
[INFO] [stderr]     |
[INFO] [stderr] 164 |         Array(vec![String("foo\nbar".to_string()), F64(3.5)])]);
[INFO] [stderr]     |                                                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:189:31
[INFO] [stderr]     |
[INFO] [stderr] 189 |             ("a".to_string(), Boolean(true))
[INFO] [stderr]     |                               ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:194:39
[INFO] [stderr]     |
[INFO] [stderr] 194 |         mk_object(&[("a".to_string(), Boolean(true))]).pretty().to_string(),
[INFO] [stderr]     |                                       ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:202:31
[INFO] [stderr]     |
[INFO] [stderr] 202 |             ("b".to_string(), Array(vec![
[INFO] [stderr]     |                               ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:203:47
[INFO] [stderr]     |
[INFO] [stderr] 203 |                 mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
[INFO] [stderr]     |                                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:204:47
[INFO] [stderr]     |
[INFO] [stderr] 204 |                 mk_object(&[("d".to_string(), String("".to_string()))])
[INFO] [stderr]     |                                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:233:27
[INFO] [stderr]     |
[INFO] [stderr] 233 |         ("a".to_string(), Boolean(true)),
[INFO] [stderr]     |                           ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:234:27
[INFO] [stderr]     |
[INFO] [stderr] 234 |         ("b".to_string(), Array(vec![
[INFO] [stderr]     |                           ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:235:43
[INFO] [stderr]     |
[INFO] [stderr] 235 |             mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
[INFO] [stderr]     |                                           ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:236:43
[INFO] [stderr]     |
[INFO] [stderr] 236 |             mk_object(&[("d".to_string(), String("".to_string()))])
[INFO] [stderr]     |                                           ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:250:9
[INFO] [stderr]     |
[INFO] [stderr] 250 |         json::as_json(&animal).to_string(),
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:254:9
[INFO] [stderr]     |
[INFO] [stderr] 254 |         json::as_pretty_json(&animal).to_string(),
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |         json::as_json(&animal).to_string(),
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:264:9
[INFO] [stderr]     |
[INFO] [stderr] 264 |         json::as_pretty_json(&animal).to_string(),
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 287 |     check_encoder_for_simple!(Some("jodhpurs".to_string()), "\"jodhpurs\"");
[INFO] [stderr]     |     ------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 287 |     check_encoder_for_simple!(Some("jodhpurs".to_string()), "\"jodhpurs\"");
[INFO] [stderr]     |     ------------------------------------------------------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 292 |     check_encoder_for_simple!(None::<string::String>, "null");
[INFO] [stderr]     |     ---------------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 292 |     check_encoder_for_simple!(None::<string::String>, "null");
[INFO] [stderr]     |     ---------------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 297 |     check_encoder_for_simple!('a', "\"a\"");
[INFO] [stderr]     |     ---------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 297 |     check_encoder_for_simple!('a', "\"a\"");
[INFO] [stderr]     |     ---------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 298 |     check_encoder_for_simple!('\t', "\"\\t\"");
[INFO] [stderr]     |     ------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 298 |     check_encoder_for_simple!('\t', "\"\\t\"");
[INFO] [stderr]     |     ------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 299 |     check_encoder_for_simple!('\u{0000}', "\"\\u0000\"");
[INFO] [stderr]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 299 |     check_encoder_for_simple!('\u{0000}', "\"\\u0000\"");
[INFO] [stderr]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 300 |     check_encoder_for_simple!('\u{001b}', "\"\\u001b\"");
[INFO] [stderr]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 300 |     check_encoder_for_simple!('\u{001b}', "\"\\u001b\"");
[INFO] [stderr]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 301 |     check_encoder_for_simple!('\u{007f}', "\"\\u007f\"");
[INFO] [stderr]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 301 |     check_encoder_for_simple!('\u{007f}', "\"\\u007f\"");
[INFO] [stderr]     |     ----------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 302 |     check_encoder_for_simple!('\u{00a0}', "\"\u{00a0}\"");
[INFO] [stderr]     |     ------------------------------------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 302 |     check_encoder_for_simple!('\u{00a0}', "\"\u{00a0}\"");
[INFO] [stderr]     |     ------------------------------------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 303 |     check_encoder_for_simple!('\u{abcd}', "\"\u{abcd}\"");
[INFO] [stderr]     |     ------------------------------------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 303 |     check_encoder_for_simple!('\u{abcd}', "\"\u{abcd}\"");
[INFO] [stderr]     |     ------------------------------------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:277:17
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let s = json::as_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 304 |     check_encoder_for_simple!('\u{10ffff}', "\"\u{10ffff}\"");
[INFO] [stderr]     |     ---------------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:280:17
[INFO] [stderr]     |
[INFO] [stderr] 280 |         let s = json::as_pretty_json(&$value).to_string();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 304 |     check_encoder_for_simple!('\u{10ffff}', "\"\u{10ffff}\"");
[INFO] [stderr]     |     ---------------------------------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:309:16
[INFO] [stderr]     |
[INFO] [stderr] 309 |     assert_eq!(from_str("nulla"),  Err(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:309:40
[INFO] [stderr]     |
[INFO] [stderr] 309 |     assert_eq!(from_str("nulla"),  Err(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]     |                                        ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:309:52
[INFO] [stderr]     |
[INFO] [stderr] 309 |     assert_eq!(from_str("nulla"),  Err(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:310:16
[INFO] [stderr]     |
[INFO] [stderr] 310 |     assert_eq!(from_str("truea"),  Err(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:310:40
[INFO] [stderr]     |
[INFO] [stderr] 310 |     assert_eq!(from_str("truea"),  Err(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]     |                                        ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:310:52
[INFO] [stderr]     |
[INFO] [stderr] 310 |     assert_eq!(from_str("truea"),  Err(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:311:16
[INFO] [stderr]     |
[INFO] [stderr] 311 |     assert_eq!(from_str("falsea"), Err(SyntaxError(TrailingCharacters, 1, 6)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:311:40
[INFO] [stderr]     |
[INFO] [stderr] 311 |     assert_eq!(from_str("falsea"), Err(SyntaxError(TrailingCharacters, 1, 6)));
[INFO] [stderr]     |                                        ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:311:52
[INFO] [stderr]     |
[INFO] [stderr] 311 |     assert_eq!(from_str("falsea"), Err(SyntaxError(TrailingCharacters, 1, 6)));
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:312:16
[INFO] [stderr]     |
[INFO] [stderr] 312 |     assert_eq!(from_str("1a"),     Err(SyntaxError(TrailingCharacters, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:312:40
[INFO] [stderr]     |
[INFO] [stderr] 312 |     assert_eq!(from_str("1a"),     Err(SyntaxError(TrailingCharacters, 1, 2)));
[INFO] [stderr]     |                                        ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:312:52
[INFO] [stderr]     |
[INFO] [stderr] 312 |     assert_eq!(from_str("1a"),     Err(SyntaxError(TrailingCharacters, 1, 2)));
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:313:16
[INFO] [stderr]     |
[INFO] [stderr] 313 |     assert_eq!(from_str("[]a"),    Err(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:313:40
[INFO] [stderr]     |
[INFO] [stderr] 313 |     assert_eq!(from_str("[]a"),    Err(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]     |                                        ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:313:52
[INFO] [stderr]     |
[INFO] [stderr] 313 |     assert_eq!(from_str("[]a"),    Err(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:314:16
[INFO] [stderr]     |
[INFO] [stderr] 314 |     assert_eq!(from_str("{}a"),    Err(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:314:40
[INFO] [stderr]     |
[INFO] [stderr] 314 |     assert_eq!(from_str("{}a"),    Err(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]     |                                        ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:314:52
[INFO] [stderr]     |
[INFO] [stderr] 314 |     assert_eq!(from_str("{}a"),    Err(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:319:16
[INFO] [stderr]     |
[INFO] [stderr] 319 |     assert_eq!(from_str("n"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:319:38
[INFO] [stderr]     |
[INFO] [stderr] 319 |     assert_eq!(from_str("n"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:319:50
[INFO] [stderr]     |
[INFO] [stderr] 319 |     assert_eq!(from_str("n"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:320:16
[INFO] [stderr]     |
[INFO] [stderr] 320 |     assert_eq!(from_str("nul"),  Err(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:320:38
[INFO] [stderr]     |
[INFO] [stderr] 320 |     assert_eq!(from_str("nul"),  Err(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]     |                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:320:50
[INFO] [stderr]     |
[INFO] [stderr] 320 |     assert_eq!(from_str("nul"),  Err(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:321:16
[INFO] [stderr]     |
[INFO] [stderr] 321 |     assert_eq!(from_str("t"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:321:38
[INFO] [stderr]     |
[INFO] [stderr] 321 |     assert_eq!(from_str("t"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:321:50
[INFO] [stderr]     |
[INFO] [stderr] 321 |     assert_eq!(from_str("t"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:322:16
[INFO] [stderr]     |
[INFO] [stderr] 322 |     assert_eq!(from_str("truz"), Err(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:322:38
[INFO] [stderr]     |
[INFO] [stderr] 322 |     assert_eq!(from_str("truz"), Err(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]     |                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:322:50
[INFO] [stderr]     |
[INFO] [stderr] 322 |     assert_eq!(from_str("truz"), Err(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:323:16
[INFO] [stderr]     |
[INFO] [stderr] 323 |     assert_eq!(from_str("f"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:323:38
[INFO] [stderr]     |
[INFO] [stderr] 323 |     assert_eq!(from_str("f"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:323:50
[INFO] [stderr]     |
[INFO] [stderr] 323 |     assert_eq!(from_str("f"),    Err(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:324:16
[INFO] [stderr]     |
[INFO] [stderr] 324 |     assert_eq!(from_str("faz"),  Err(SyntaxError(InvalidSyntax, 1, 3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:324:38
[INFO] [stderr]     |
[INFO] [stderr] 324 |     assert_eq!(from_str("faz"),  Err(SyntaxError(InvalidSyntax, 1, 3)));
[INFO] [stderr]     |                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:324:50
[INFO] [stderr]     |
[INFO] [stderr] 324 |     assert_eq!(from_str("faz"),  Err(SyntaxError(InvalidSyntax, 1, 3)));
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:326:16
[INFO] [stderr]     |
[INFO] [stderr] 326 |     assert_eq!(from_str("null"), Ok(Null));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:326:37
[INFO] [stderr]     |
[INFO] [stderr] 326 |     assert_eq!(from_str("null"), Ok(Null));
[INFO] [stderr]     |                                     ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:327:16
[INFO] [stderr]     |
[INFO] [stderr] 327 |     assert_eq!(from_str("true"), Ok(Boolean(true)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:327:37
[INFO] [stderr]     |
[INFO] [stderr] 327 |     assert_eq!(from_str("true"), Ok(Boolean(true)));
[INFO] [stderr]     |                                     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:328:16
[INFO] [stderr]     |
[INFO] [stderr] 328 |     assert_eq!(from_str("false"), Ok(Boolean(false)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:328:38
[INFO] [stderr]     |
[INFO] [stderr] 328 |     assert_eq!(from_str("false"), Ok(Boolean(false)));
[INFO] [stderr]     |                                      ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:329:16
[INFO] [stderr]     |
[INFO] [stderr] 329 |     assert_eq!(from_str(" null "), Ok(Null));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:329:39
[INFO] [stderr]     |
[INFO] [stderr] 329 |     assert_eq!(from_str(" null "), Ok(Null));
[INFO] [stderr]     |                                       ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:330:16
[INFO] [stderr]     |
[INFO] [stderr] 330 |     assert_eq!(from_str(" true "), Ok(Boolean(true)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:330:39
[INFO] [stderr]     |
[INFO] [stderr] 330 |     assert_eq!(from_str(" true "), Ok(Boolean(true)));
[INFO] [stderr]     |                                       ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:331:16
[INFO] [stderr]     |
[INFO] [stderr] 331 |     assert_eq!(from_str(" false "), Ok(Boolean(false)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:331:40
[INFO] [stderr]     |
[INFO] [stderr] 331 |     assert_eq!(from_str(" false "), Ok(Boolean(false)));
[INFO] [stderr]     |                                        ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:336:17
[INFO] [stderr]     |
[INFO] [stderr] 336 |     let v: () = json::decode("null").unwrap();
[INFO] [stderr]     |                 ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:339:19
[INFO] [stderr]     |
[INFO] [stderr] 339 |     let v: bool = json::decode("true").unwrap();
[INFO] [stderr]     |                   ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:342:19
[INFO] [stderr]     |
[INFO] [stderr] 342 |     let v: bool = json::decode("false").unwrap();
[INFO] [stderr]     |                   ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:348:16
[INFO] [stderr]     |
[INFO] [stderr] 348 |     assert_eq!(from_str("+"),   Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:348:37
[INFO] [stderr]     |
[INFO] [stderr] 348 |     assert_eq!(from_str("+"),   Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:348:49
[INFO] [stderr]     |
[INFO] [stderr] 348 |     assert_eq!(from_str("+"),   Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:349:16
[INFO] [stderr]     |
[INFO] [stderr] 349 |     assert_eq!(from_str("."),   Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:349:37
[INFO] [stderr]     |
[INFO] [stderr] 349 |     assert_eq!(from_str("."),   Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:349:49
[INFO] [stderr]     |
[INFO] [stderr] 349 |     assert_eq!(from_str("."),   Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:350:16
[INFO] [stderr]     |
[INFO] [stderr] 350 |     assert_eq!(from_str("NaN"), Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:350:37
[INFO] [stderr]     |
[INFO] [stderr] 350 |     assert_eq!(from_str("NaN"), Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:350:49
[INFO] [stderr]     |
[INFO] [stderr] 350 |     assert_eq!(from_str("NaN"), Err(SyntaxError(InvalidSyntax, 1, 1)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:351:16
[INFO] [stderr]     |
[INFO] [stderr] 351 |     assert_eq!(from_str("-"),   Err(SyntaxError(InvalidNumber, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:351:37
[INFO] [stderr]     |
[INFO] [stderr] 351 |     assert_eq!(from_str("-"),   Err(SyntaxError(InvalidNumber, 1, 2)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:351:49
[INFO] [stderr]     |
[INFO] [stderr] 351 |     assert_eq!(from_str("-"),   Err(SyntaxError(InvalidNumber, 1, 2)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:352:16
[INFO] [stderr]     |
[INFO] [stderr] 352 |     assert_eq!(from_str("00"),  Err(SyntaxError(InvalidNumber, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:352:37
[INFO] [stderr]     |
[INFO] [stderr] 352 |     assert_eq!(from_str("00"),  Err(SyntaxError(InvalidNumber, 1, 2)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:352:49
[INFO] [stderr]     |
[INFO] [stderr] 352 |     assert_eq!(from_str("00"),  Err(SyntaxError(InvalidNumber, 1, 2)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:353:16
[INFO] [stderr]     |
[INFO] [stderr] 353 |     assert_eq!(from_str("1."),  Err(SyntaxError(InvalidNumber, 1, 3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:353:37
[INFO] [stderr]     |
[INFO] [stderr] 353 |     assert_eq!(from_str("1."),  Err(SyntaxError(InvalidNumber, 1, 3)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:353:49
[INFO] [stderr]     |
[INFO] [stderr] 353 |     assert_eq!(from_str("1."),  Err(SyntaxError(InvalidNumber, 1, 3)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:354:16
[INFO] [stderr]     |
[INFO] [stderr] 354 |     assert_eq!(from_str("1e"),  Err(SyntaxError(InvalidNumber, 1, 3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:354:37
[INFO] [stderr]     |
[INFO] [stderr] 354 |     assert_eq!(from_str("1e"),  Err(SyntaxError(InvalidNumber, 1, 3)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:354:49
[INFO] [stderr]     |
[INFO] [stderr] 354 |     assert_eq!(from_str("1e"),  Err(SyntaxError(InvalidNumber, 1, 3)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:355:16
[INFO] [stderr]     |
[INFO] [stderr] 355 |     assert_eq!(from_str("1e+"), Err(SyntaxError(InvalidNumber, 1, 4)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:355:37
[INFO] [stderr]     |
[INFO] [stderr] 355 |     assert_eq!(from_str("1e+"), Err(SyntaxError(InvalidNumber, 1, 4)));
[INFO] [stderr]     |                                     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:355:49
[INFO] [stderr]     |
[INFO] [stderr] 355 |     assert_eq!(from_str("1e+"), Err(SyntaxError(InvalidNumber, 1, 4)));
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:357:16
[INFO] [stderr]     |
[INFO] [stderr] 357 |     assert_eq!(from_str("18446744073709551616"), Err(SyntaxError(InvalidNumber, 1, 20)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:357:54
[INFO] [stderr]     |
[INFO] [stderr] 357 |     assert_eq!(from_str("18446744073709551616"), Err(SyntaxError(InvalidNumber, 1, 20)));
[INFO] [stderr]     |                                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:357:66
[INFO] [stderr]     |
[INFO] [stderr] 357 |     assert_eq!(from_str("18446744073709551616"), Err(SyntaxError(InvalidNumber, 1, 20)));
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:358:16
[INFO] [stderr]     |
[INFO] [stderr] 358 |     assert_eq!(from_str("-9223372036854775809"), Err(SyntaxError(InvalidNumber, 1, 21)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:358:54
[INFO] [stderr]     |
[INFO] [stderr] 358 |     assert_eq!(from_str("-9223372036854775809"), Err(SyntaxError(InvalidNumber, 1, 21)));
[INFO] [stderr]     |                                                      ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     a: (),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:358:66
[INFO] [stderr]     |
[INFO] [stderr] 358 |     assert_eq!(from_str("-9223372036854775809"), Err(SyntaxError(InvalidNumber, 1, 21)));
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 14 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:360:16
[INFO] [stderr]     |
[INFO] [stderr] 360 |     assert_eq!(from_str("3"), Ok(U64(3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:360:34
[INFO] [stderr]     |
[INFO] [stderr] 360 |     assert_eq!(from_str("3"), Ok(U64(3)));
[INFO] [stderr]     |                                  ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     b: u8,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:361:16
[INFO] [stderr]     |
[INFO] [stderr] 361 |     assert_eq!(from_str("3.1"), Ok(F64(3.1)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:361:36
[INFO] [stderr]     |
[INFO] [stderr] 361 |     assert_eq!(from_str("3.1"), Ok(F64(3.1)));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:362:16
[INFO] [stderr]     |
[INFO] [stderr] 362 |     assert_eq!(from_str("-1.2"), Ok(F64(-1.2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:362:37
[INFO] [stderr]     |
[INFO] [stderr] 362 |     assert_eq!(from_str("-1.2"), Ok(F64(-1.2)));
[INFO] [stderr]     |                                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:363:16
[INFO] [stderr]     |
[INFO] [stderr] 363 |     assert_eq!(from_str("0.4"), Ok(F64(0.4)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:363:36
[INFO] [stderr]     |
[INFO] [stderr] 363 |     assert_eq!(from_str("0.4"), Ok(F64(0.4)));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:364:16
[INFO] [stderr]     |
[INFO] [stderr] 364 |     assert_eq!(from_str("0.4e5"), Ok(F64(0.4e5)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:364:38
[INFO] [stderr]     |
[INFO] [stderr] 364 |     assert_eq!(from_str("0.4e5"), Ok(F64(0.4e5)));
[INFO] [stderr]     |                                      ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:365:16
[INFO] [stderr]     |
[INFO] [stderr] 365 |     assert_eq!(from_str("0.4e+15"), Ok(F64(0.4e15)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:365:40
[INFO] [stderr]     |
[INFO] [stderr] 365 |     assert_eq!(from_str("0.4e+15"), Ok(F64(0.4e15)));
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:366:16
[INFO] [stderr]     |
[INFO] [stderr] 366 |     assert_eq!(from_str("0.4e-01"), Ok(F64(0.4e-01)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:366:40
[INFO] [stderr]     |
[INFO] [stderr] 366 |     assert_eq!(from_str("0.4e-01"), Ok(F64(0.4e-01)));
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:367:16
[INFO] [stderr]     |
[INFO] [stderr] 367 |     assert_eq!(from_str(" 3 "), Ok(U64(3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:367:36
[INFO] [stderr]     |
[INFO] [stderr] 367 |     assert_eq!(from_str(" 3 "), Ok(U64(3)));
[INFO] [stderr]     |                                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:369:16
[INFO] [stderr]     |
[INFO] [stderr] 369 |     assert_eq!(from_str("-9223372036854775808"), Ok(I64(i64::MIN)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:369:53
[INFO] [stderr]     |
[INFO] [stderr] 369 |     assert_eq!(from_str("-9223372036854775808"), Ok(I64(i64::MIN)));
[INFO] [stderr]     |                                                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:370:16
[INFO] [stderr]     |
[INFO] [stderr] 370 |     assert_eq!(from_str("9223372036854775807"), Ok(U64(i64::MAX as u64)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:370:52
[INFO] [stderr]     |
[INFO] [stderr] 370 |     assert_eq!(from_str("9223372036854775807"), Ok(U64(i64::MAX as u64)));
[INFO] [stderr]     |                                                    ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     c: u16,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:371:16
[INFO] [stderr]     |
[INFO] [stderr] 371 |     assert_eq!(from_str("18446744073709551615"), Ok(U64(u64::MAX)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:371:53
[INFO] [stderr]     |
[INFO] [stderr] 371 |     assert_eq!(from_str("18446744073709551615"), Ok(U64(u64::MAX)));
[INFO] [stderr]     |                                                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:376:18
[INFO] [stderr]     |
[INFO] [stderr] 376 |     let v: f64 = json::decode("3").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rustc-ap-serialize`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:379:18
[INFO] [stderr]     |
[INFO] [stderr] 379 |     let v: f64 = json::decode("3.1").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:382:18
[INFO] [stderr]     |
[INFO] [stderr] 382 |     let v: f64 = json::decode("-1.2").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:385:18
[INFO] [stderr]     |
[INFO] [stderr] 385 |     let v: f64 = json::decode("0.4").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:388:18
[INFO] [stderr]     |
[INFO] [stderr] 388 |     let v: f64 = json::decode("0.4e5").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:391:18
[INFO] [stderr]     |
[INFO] [stderr] 391 |     let v: f64 = json::decode("0.4e15").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:394:18
[INFO] [stderr]     |
[INFO] [stderr] 394 |     let v: f64 = json::decode("0.4e-01").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     d: u32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     e: u64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     f: usize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:397:18
[INFO] [stderr]     |
[INFO] [stderr] 397 |     let v: u64 = json::decode("0").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     g: i8,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:400:18
[INFO] [stderr]     |
[INFO] [stderr] 400 |     let v: u64 = json::decode("18446744073709551615").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:403:18
[INFO] [stderr]     |
[INFO] [stderr] 403 |     let v: i64 = json::decode("-9223372036854775808").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:406:18
[INFO] [stderr]     |
[INFO] [stderr] 406 |     let v: i64 = json::decode("9223372036854775807").unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:409:34
[INFO] [stderr]     |
[INFO] [stderr] 409 |     let res: DecodeResult<i64> = json::decode("765.25");
[INFO] [stderr]     |                                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     h: i16,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:409:14
[INFO] [stderr]     |
[INFO] [stderr] 409 |     let res: DecodeResult<i64> = json::decode("765.25");
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     i: i32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     j: i64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:410:25
[INFO] [stderr]     |
[INFO] [stderr] 410 |     assert_eq!(res, Err(ExpectedError("Integer".to_string(),
[INFO] [stderr]     |                         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:416:16
[INFO] [stderr]     |
[INFO] [stderr] 416 |     assert_eq!(from_str("\""),    Err(SyntaxError(EOFWhileParsingString, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:416:39
[INFO] [stderr]     |
[INFO] [stderr] 416 |     assert_eq!(from_str("\""),    Err(SyntaxError(EOFWhileParsingString, 1, 2)));
[INFO] [stderr]     |                                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:416:51
[INFO] [stderr]     |
[INFO] [stderr] 416 |     assert_eq!(from_str("\""),    Err(SyntaxError(EOFWhileParsingString, 1, 2)));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:417:16
[INFO] [stderr]     |
[INFO] [stderr] 417 |     assert_eq!(from_str("\"lol"), Err(SyntaxError(EOFWhileParsingString, 1, 5)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:417:39
[INFO] [stderr]     |
[INFO] [stderr] 417 |     assert_eq!(from_str("\"lol"), Err(SyntaxError(EOFWhileParsingString, 1, 5)));
[INFO] [stderr]     |                                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:417:51
[INFO] [stderr]     |
[INFO] [stderr] 417 |     assert_eq!(from_str("\"lol"), Err(SyntaxError(EOFWhileParsingString, 1, 5)));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:419:16
[INFO] [stderr]     |
[INFO] [stderr] 419 |     assert_eq!(from_str("\"\""), Ok(String("".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:419:37
[INFO] [stderr]     |
[INFO] [stderr] 419 |     assert_eq!(from_str("\"\""), Ok(String("".to_string())));
[INFO] [stderr]     |                                     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:420:16
[INFO] [stderr]     |
[INFO] [stderr] 420 |     assert_eq!(from_str("\"foo\""), Ok(String("foo".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:420:40
[INFO] [stderr]     |
[INFO] [stderr] 420 |     assert_eq!(from_str("\"foo\""), Ok(String("foo".to_string())));
[INFO] [stderr]     |                                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:421:16
[INFO] [stderr]     |
[INFO] [stderr] 421 |     assert_eq!(from_str("\"\\\"\""), Ok(String("\"".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:421:41
[INFO] [stderr]     |
[INFO] [stderr] 421 |     assert_eq!(from_str("\"\\\"\""), Ok(String("\"".to_string())));
[INFO] [stderr]     |                                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:422:16
[INFO] [stderr]     |
[INFO] [stderr] 422 |     assert_eq!(from_str("\"\\b\""), Ok(String("\x08".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     k: isize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:422:40
[INFO] [stderr]     |
[INFO] [stderr] 422 |     assert_eq!(from_str("\"\\b\""), Ok(String("\x08".to_string())));
[INFO] [stderr]     |                                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     l: char,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:423:16
[INFO] [stderr]     |
[INFO] [stderr] 423 |     assert_eq!(from_str("\"\\n\""), Ok(String("\n".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     m: String,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:423:40
[INFO] [stderr]     |
[INFO] [stderr] 423 |     assert_eq!(from_str("\"\\n\""), Ok(String("\n".to_string())));
[INFO] [stderr]     |                                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:424:16
[INFO] [stderr]     |
[INFO] [stderr] 424 |     assert_eq!(from_str("\"\\r\""), Ok(String("\r".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:424:40
[INFO] [stderr]     |
[INFO] [stderr] 424 |     assert_eq!(from_str("\"\\r\""), Ok(String("\r".to_string())));
[INFO] [stderr]     |                                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:425:16
[INFO] [stderr]     |
[INFO] [stderr] 425 |     assert_eq!(from_str("\"\\t\""), Ok(String("\t".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:425:40
[INFO] [stderr]     |
[INFO] [stderr] 425 |     assert_eq!(from_str("\"\\t\""), Ok(String("\t".to_string())));
[INFO] [stderr]     |                                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:426:16
[INFO] [stderr]     |
[INFO] [stderr] 426 |     assert_eq!(from_str(" \"foo\" "), Ok(String("foo".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:426:42
[INFO] [stderr]     |
[INFO] [stderr] 426 |     assert_eq!(from_str(" \"foo\" "), Ok(String("foo".to_string())));
[INFO] [stderr]     |                                          ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:427:16
[INFO] [stderr]     |
[INFO] [stderr] 427 |     assert_eq!(from_str("\"\\u12ab\""), Ok(String("\u{12ab}".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:427:44
[INFO] [stderr]     |
[INFO] [stderr] 427 |     assert_eq!(from_str("\"\\u12ab\""), Ok(String("\u{12ab}".to_string())));
[INFO] [stderr]     |                                            ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:428:16
[INFO] [stderr]     |
[INFO] [stderr] 428 |     assert_eq!(from_str("\"\\uAB12\""), Ok(String("\u{AB12}".to_string())));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:428:44
[INFO] [stderr]     |
[INFO] [stderr] 428 |     assert_eq!(from_str("\"\\uAB12\""), Ok(String("\u{AB12}".to_string())));
[INFO] [stderr]     |                                            ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:444:33
[INFO] [stderr]     |
[INFO] [stderr] 444 |         let v: string::String = json::decode(i).unwrap();
[INFO] [stderr]     |                                 ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:451:16
[INFO] [stderr]     |
[INFO] [stderr] 451 |     assert_eq!(from_str("["),     Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:451:39
[INFO] [stderr]     |
[INFO] [stderr] 451 |     assert_eq!(from_str("["),     Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
[INFO] [stderr]     |                                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:451:51
[INFO] [stderr]     |
[INFO] [stderr] 451 |     assert_eq!(from_str("["),     Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:452:16
[INFO] [stderr]     |
[INFO] [stderr] 452 |     assert_eq!(from_str("[1"),    Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:452:39
[INFO] [stderr]     |
[INFO] [stderr] 452 |     assert_eq!(from_str("[1"),    Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
[INFO] [stderr]     |                                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     n: f32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:452:51
[INFO] [stderr]     |
[INFO] [stderr] 452 |     assert_eq!(from_str("[1"),    Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:453:16
[INFO] [stderr]     |
[INFO] [stderr] 453 |     assert_eq!(from_str("[1,"),   Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:453:39
[INFO] [stderr]     |
[INFO] [stderr] 453 |     assert_eq!(from_str("[1,"),   Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
[INFO] [stderr]     |                                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:453:51
[INFO] [stderr]     |
[INFO] [stderr] 453 |     assert_eq!(from_str("[1,"),   Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:454:16
[INFO] [stderr]     |
[INFO] [stderr] 454 |     assert_eq!(from_str("[1,]"),  Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:454:39
[INFO] [stderr]     |
[INFO] [stderr] 454 |     assert_eq!(from_str("[1,]"),  Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]     |                                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:454:51
[INFO] [stderr]     |
[INFO] [stderr] 454 |     assert_eq!(from_str("[1,]"),  Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:455:16
[INFO] [stderr]     |
[INFO] [stderr] 455 |     assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     o: f64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     p: bool,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     q: Option<u32>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:455:39
[INFO] [stderr]     |
[INFO] [stderr] 455 |     assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]     |                                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:455:51
[INFO] [stderr]     |
[INFO] [stderr] 455 |     assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:457:16
[INFO] [stderr]     |
[INFO] [stderr] 457 |     assert_eq!(from_str("[]"), Ok(Array(vec![])));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:457:35
[INFO] [stderr]     |
[INFO] [stderr] 457 |     assert_eq!(from_str("[]"), Ok(Array(vec![])));
[INFO] [stderr]     |                                   ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:458:16
[INFO] [stderr]     |
[INFO] [stderr] 458 |     assert_eq!(from_str("[ ]"), Ok(Array(vec![])));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:458:36
[INFO] [stderr]     |
[INFO] [stderr] 458 |     assert_eq!(from_str("[ ]"), Ok(Array(vec![])));
[INFO] [stderr]     |                                    ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:459:16
[INFO] [stderr]     |
[INFO] [stderr] 459 |     assert_eq!(from_str("[true]"), Ok(Array(vec![Boolean(true)])));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:459:39
[INFO] [stderr]     |
[INFO] [stderr] 459 |     assert_eq!(from_str("[true]"), Ok(Array(vec![Boolean(true)])));
[INFO] [stderr]     |                                       ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:459:50
[INFO] [stderr]     |
[INFO] [stderr] 459 |     assert_eq!(from_str("[true]"), Ok(Array(vec![Boolean(true)])));
[INFO] [stderr]     |                                                  ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:460:16
[INFO] [stderr]     |
[INFO] [stderr] 460 |     assert_eq!(from_str("[ false ]"), Ok(Array(vec![Boolean(false)])));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:460:42
[INFO] [stderr]     |
[INFO] [stderr] 460 |     assert_eq!(from_str("[ false ]"), Ok(Array(vec![Boolean(false)])));
[INFO] [stderr]     |                                          ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:460:53
[INFO] [stderr]     |
[INFO] [stderr] 460 |     assert_eq!(from_str("[ false ]"), Ok(Array(vec![Boolean(false)])));
[INFO] [stderr]     |                                                     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:461:16
[INFO] [stderr]     |
[INFO] [stderr] 461 |     assert_eq!(from_str("[null]"), Ok(Array(vec![Null])));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:461:39
[INFO] [stderr]     |
[INFO] [stderr] 461 |     assert_eq!(from_str("[null]"), Ok(Array(vec![Null])));
[INFO] [stderr]     |                                       ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:461:50
[INFO] [stderr]     |
[INFO] [stderr] 461 |     assert_eq!(from_str("[null]"), Ok(Array(vec![Null])));
[INFO] [stderr]     |                                                  ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:462:16
[INFO] [stderr]     |
[INFO] [stderr] 462 |     assert_eq!(from_str("[3, 1]"),
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:463:21
[INFO] [stderr]     |
[INFO] [stderr] 463 |                  Ok(Array(vec![U64(3), U64(1)])));
[INFO] [stderr]     |                     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:463:32
[INFO] [stderr]     |
[INFO] [stderr] 463 |                  Ok(Array(vec![U64(3), U64(1)])));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:463:40
[INFO] [stderr]     |
[INFO] [stderr] 463 |                  Ok(Array(vec![U64(3), U64(1)])));
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:464:16
[INFO] [stderr]     |
[INFO] [stderr] 464 |     assert_eq!(from_str("\n[3, 2]\n"),
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:465:21
[INFO] [stderr]     |
[INFO] [stderr] 465 |                  Ok(Array(vec![U64(3), U64(2)])));
[INFO] [stderr]     |                     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:465:32
[INFO] [stderr]     |
[INFO] [stderr] 465 |                  Ok(Array(vec![U64(3), U64(2)])));
[INFO] [stderr]     |                                ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     a: (),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     b: u8,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     c: u16,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     d: u32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     e: u64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     f: usize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:465:40
[INFO] [stderr]     |
[INFO] [stderr] 465 |                  Ok(Array(vec![U64(3), U64(2)])));
[INFO] [stderr]     |                                        ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:466:16
[INFO] [stderr]     |
[INFO] [stderr] 466 |     assert_eq!(from_str("[2, [4, 1]]"),
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:467:15
[INFO] [stderr]     |
[INFO] [stderr] 467 |            Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
[INFO] [stderr]     |               ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:467:26
[INFO] [stderr]     |
[INFO] [stderr] 467 |            Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
[INFO] [stderr]     |                          ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:467:34
[INFO] [stderr]     |
[INFO] [stderr] 467 |            Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
[INFO] [stderr]     |                                  ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:467:45
[INFO] [stderr]     |
[INFO] [stderr] 467 |            Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
[INFO] [stderr]     |                                             ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:467:53
[INFO] [stderr]     |
[INFO] [stderr] 467 |            Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
[INFO] [stderr]     |                                                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:472:22
[INFO] [stderr]     |
[INFO] [stderr] 472 |     let v: Vec<()> = json::decode("[]").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:475:22
[INFO] [stderr]     |
[INFO] [stderr] 475 |     let v: Vec<()> = json::decode("[null]").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:478:24
[INFO] [stderr]     |
[INFO] [stderr] 478 |     let v: Vec<bool> = json::decode("[true]").unwrap();
[INFO] [stderr]     |                        ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:481:25
[INFO] [stderr]     |
[INFO] [stderr] 481 |     let v: Vec<isize> = json::decode("[3, 1]").unwrap();
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:484:30
[INFO] [stderr]     |
[INFO] [stderr] 484 |     let v: Vec<Vec<usize>> = json::decode("[[3], [1, 2]]").unwrap();
[INFO] [stderr]     |                              ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:490:36
[INFO] [stderr]     |
[INFO] [stderr] 490 |     let t: (usize, usize, usize) = json::decode("[1, 2, 3]").unwrap();
[INFO] [stderr]     |                                    ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:493:38
[INFO] [stderr]     |
[INFO] [stderr] 493 |     let t: (usize, string::String) = json::decode("[1, \"two\"]").unwrap();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:499:13
[INFO] [stderr]     |
[INFO] [stderr] 499 |     assert!(json::decode::<(usize, string::String)>("[1, 2]").is_err());
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:504:13
[INFO] [stderr]     |
[INFO] [stderr] 504 |     assert!(json::decode::<(usize, usize)>("[1, 2, 3]").is_err());
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:509:16
[INFO] [stderr]     |
[INFO] [stderr] 509 |     assert_eq!(from_str("{"),       Err(SyntaxError(EOFWhileParsingObject, 1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:509:41
[INFO] [stderr]     |
[INFO] [stderr] 509 |     assert_eq!(from_str("{"),       Err(SyntaxError(EOFWhileParsingObject, 1, 2)));
[INFO] [stderr]     |                                         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:509:53
[INFO] [stderr]     |
[INFO] [stderr] 509 |     assert_eq!(from_str("{"),       Err(SyntaxError(EOFWhileParsingObject, 1, 2)));
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:510:16
[INFO] [stderr]     |
[INFO] [stderr] 510 |     assert_eq!(from_str("{ "),      Err(SyntaxError(EOFWhileParsingObject, 1, 3)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     g: i8,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:510:41
[INFO] [stderr]     |
[INFO] [stderr] 510 |     assert_eq!(from_str("{ "),      Err(SyntaxError(EOFWhileParsingObject, 1, 3)));
[INFO] [stderr]     |                                         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:510:53
[INFO] [stderr]     |
[INFO] [stderr] 510 |     assert_eq!(from_str("{ "),      Err(SyntaxError(EOFWhileParsingObject, 1, 3)));
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:511:16
[INFO] [stderr]     |
[INFO] [stderr] 511 |     assert_eq!(from_str("{1"),      Err(SyntaxError(KeyMustBeAString,      1, 2)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:511:41
[INFO] [stderr]     |
[INFO] [stderr] 511 |     assert_eq!(from_str("{1"),      Err(SyntaxError(KeyMustBeAString,      1, 2)));
[INFO] [stderr]     |                                         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:511:53
[INFO] [stderr]     |
[INFO] [stderr] 511 |     assert_eq!(from_str("{1"),      Err(SyntaxError(KeyMustBeAString,      1, 2)));
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:512:16
[INFO] [stderr]     |
[INFO] [stderr] 512 |     assert_eq!(from_str("{ \"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:512:41
[INFO] [stderr]     |
[INFO] [stderr] 512 |     assert_eq!(from_str("{ \"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]     |                                         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:512:53
[INFO] [stderr]     |
[INFO] [stderr] 512 |     assert_eq!(from_str("{ \"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:513:16
[INFO] [stderr]     |
[INFO] [stderr] 513 |     assert_eq!(from_str("{\"a\""),  Err(SyntaxError(EOFWhileParsingObject, 1, 5)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:513:41
[INFO] [stderr]     |
[INFO] [stderr] 513 |     assert_eq!(from_str("{\"a\""),  Err(SyntaxError(EOFWhileParsingObject, 1, 5)));
[INFO] [stderr]     |                                         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:513:53
[INFO] [stderr]     |
[INFO] [stderr] 513 |     assert_eq!(from_str("{\"a\""),  Err(SyntaxError(EOFWhileParsingObject, 1, 5)));
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:514:16
[INFO] [stderr]     |
[INFO] [stderr] 514 |     assert_eq!(from_str("{\"a\" "), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:514:41
[INFO] [stderr]     |
[INFO] [stderr] 514 |     assert_eq!(from_str("{\"a\" "), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]     |                                         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:514:53
[INFO] [stderr]     |
[INFO] [stderr] 514 |     assert_eq!(from_str("{\"a\" "), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     h: i16,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:516:16
[INFO] [stderr]     |
[INFO] [stderr] 516 |     assert_eq!(from_str("{\"a\" 1"),   Err(SyntaxError(ExpectedColon,         1, 6)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     i: i32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:516:44
[INFO] [stderr]     |
[INFO] [stderr] 516 |     assert_eq!(from_str("{\"a\" 1"),   Err(SyntaxError(ExpectedColon,         1, 6)));
[INFO] [stderr]     |                                            ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:516:56
[INFO] [stderr]     |
[INFO] [stderr] 516 |     assert_eq!(from_str("{\"a\" 1"),   Err(SyntaxError(ExpectedColon,         1, 6)));
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     j: i64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:517:16
[INFO] [stderr]     |
[INFO] [stderr] 517 |     assert_eq!(from_str("{\"a\":"),    Err(SyntaxError(EOFWhileParsingValue,  1, 6)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     k: isize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     l: char,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     m: String,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     n: f32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     o: f64,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     p: bool,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     q: Option<u32>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:517:44
[INFO] [stderr]     |
[INFO] [stderr] 517 |     assert_eq!(from_str("{\"a\":"),    Err(SyntaxError(EOFWhileParsingValue,  1, 6)));
[INFO] [stderr]     |                                            ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:517:56
[INFO] [stderr]     |
[INFO] [stderr] 517 |     assert_eq!(from_str("{\"a\":"),    Err(SyntaxError(EOFWhileParsingValue,  1, 6)));
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:518:16
[INFO] [stderr]     |
[INFO] [stderr] 518 |     assert_eq!(from_str("{\"a\":1"),   Err(SyntaxError(EOFWhileParsingObject, 1, 7)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:518:44
[INFO] [stderr]     |
[INFO] [stderr] 518 |     assert_eq!(from_str("{\"a\":1"),   Err(SyntaxError(EOFWhileParsingObject, 1, 7)));
[INFO] [stderr]     |                                            ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:518:56
[INFO] [stderr]     |
[INFO] [stderr] 518 |     assert_eq!(from_str("{\"a\":1"),   Err(SyntaxError(EOFWhileParsingObject, 1, 7)));
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:519:16
[INFO] [stderr]     |
[INFO] [stderr] 519 |     assert_eq!(from_str("{\"a\":1 1"), Err(SyntaxError(InvalidSyntax,         1, 8)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:519:44
[INFO] [stderr]     |
[INFO] [stderr] 519 |     assert_eq!(from_str("{\"a\":1 1"), Err(SyntaxError(InvalidSyntax,         1, 8)));
[INFO] [stderr]     |                                            ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:519:56
[INFO] [stderr]     |
[INFO] [stderr] 519 |     assert_eq!(from_str("{\"a\":1 1"), Err(SyntaxError(InvalidSyntax,         1, 8)));
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:520:16
[INFO] [stderr]     |
[INFO] [stderr] 520 |     assert_eq!(from_str("{\"a\":1,"),  Err(SyntaxError(EOFWhileParsingObject, 1, 8)));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:520:44
[INFO] [stderr]     |
[INFO] [stderr] 520 |     assert_eq!(from_str("{\"a\":1,"),  Err(SyntaxError(EOFWhileParsingObject, 1, 8)));
[INFO] [stderr]     |                                            ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:520:56
[INFO] [stderr]     |
[INFO] [stderr] 520 |     assert_eq!(from_str("{\"a\":1,"),  Err(SyntaxError(EOFWhileParsingObject, 1, 8)));
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/opaque.rs:40:24
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let data = encoder.into_inner();
[INFO] [stderr]    |                        ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:522:16
[INFO] [stderr]     |
[INFO] [stderr] 522 |     assert_eq!(from_str("{}").unwrap(), mk_object(&[]));
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:523:16
[INFO] [stderr]     |
[INFO] [stderr] 523 |     assert_eq!(from_str("{\"a\": 3}").unwrap(),
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:524:47
[INFO] [stderr]     |
[INFO] [stderr] 524 |                 mk_object(&[("a".to_string(), U64(3))]));
[INFO] [stderr]     |                                               ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:526:16
[INFO] [stderr]     |
[INFO] [stderr] 526 |     assert_eq!(from_str(
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:529:39
[INFO] [stderr]     |
[INFO] [stderr] 529 |                     ("a".to_string(), Null),
[INFO] [stderr]     |                                       ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:530:39
[INFO] [stderr]     |
[INFO] [stderr] 530 |                     ("b".to_string(), Boolean(true))]));
[INFO] [stderr]     |                                       ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:531:16
[INFO] [stderr]     |
[INFO] [stderr] 531 |     assert_eq!(from_str("\n{ \"a\": null, \"b\" : true }\n").unwrap(),
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:533:39
[INFO] [stderr]     |
[INFO] [stderr] 533 |                     ("a".to_string(), Null),
[INFO] [stderr]     |                                       ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:534:39
[INFO] [stderr]     |
[INFO] [stderr] 534 |                     ("b".to_string(), Boolean(true))]));
[INFO] [stderr]     |                                       ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:535:16
[INFO] [stderr]     |
[INFO] [stderr] 535 |     assert_eq!(from_str(
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:538:39
[INFO] [stderr]     |
[INFO] [stderr] 538 |                     ("a".to_string(), F64(1.0)),
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:539:39
[INFO] [stderr]     |
[INFO] [stderr] 539 |                     ("b".to_string(), Array(vec![Boolean(true)]))
[INFO] [stderr]     |                                       ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:539:50
[INFO] [stderr]     |
[INFO] [stderr] 539 |                     ("b".to_string(), Array(vec![Boolean(true)]))
[INFO] [stderr]     |                                                  ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:541:16
[INFO] [stderr]     |
[INFO] [stderr] 541 |     assert_eq!(from_str(
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:551:39
[INFO] [stderr]     |
[INFO] [stderr] 551 |                     ("a".to_string(), F64(1.0)),
[INFO] [stderr]     |                                       ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:552:39
[INFO] [stderr]     |
[INFO] [stderr] 552 |                     ("b".to_string(), Array(vec![
[INFO] [stderr]     |                                       ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:553:25
[INFO] [stderr]     |
[INFO] [stderr] 553 |                         Boolean(true),
[INFO] [stderr]     |                         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:554:25
[INFO] [stderr]     |
[INFO] [stderr] 554 |                         String("foo\nbar".to_string()),
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:556:77
[INFO] [stderr]     |
[INFO] [stderr] 556 | ...                   ("c".to_string(), mk_object(&[("d".to_string(), Null)]))
[INFO] [stderr]     |                                                                       ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:570:20
[INFO] [stderr]     |
[INFO] [stderr] 570 |     let v: Outer = json::decode(s).unwrap();
[INFO] [stderr]     |                    ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:581:10
[INFO] [stderr]     |
[INFO] [stderr] 581 | #[derive(RustcDecodable)]
[INFO] [stderr]     |          ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:589:28
[INFO] [stderr]     |
[INFO] [stderr] 589 |     let obj: FloatStruct = json::decode(s).unwrap();
[INFO] [stderr]     |                            ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:597:41
[INFO] [stderr]     |
[INFO] [stderr] 597 |     let value: Option<string::String> = json::decode("null").unwrap();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:600:41
[INFO] [stderr]     |
[INFO] [stderr] 600 |     let value: Option<string::String> = json::decode("\"jodhpurs\"").unwrap();
[INFO] [stderr]     |                                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:606:25
[INFO] [stderr]     |
[INFO] [stderr] 606 |     let value: Animal = json::decode("\"Dog\"").unwrap();
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:610:25
[INFO] [stderr]     |
[INFO] [stderr] 610 |     let value: Animal = json::decode(s).unwrap();
[INFO] [stderr]     |                         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:618:53
[INFO] [stderr]     |
[INFO] [stderr] 618 |     let mut map: BTreeMap<string::String, Animal> = json::decode(s).unwrap();
[INFO] [stderr]     |                                                     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:626:16
[INFO] [stderr]     |
[INFO] [stderr] 626 |     assert_eq!(from_str("{\n  \"foo\":\n \"bar\""),
[INFO] [stderr]     |                ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:627:13
[INFO] [stderr]     |
[INFO] [stderr] 627 |         Err(SyntaxError(EOFWhileParsingObject, 3, 8)));
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:627:25
[INFO] [stderr]     |
[INFO] [stderr] 627 |         Err(SyntaxError(EOFWhileParsingObject, 3, 8)));
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:630:10
[INFO] [stderr]     |
[INFO] [stderr] 630 | #[derive(RustcDecodable)]
[INFO] [stderr]     |          ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:638:10
[INFO] [stderr]     |
[INFO] [stderr] 638 | #[derive(RustcDecodable)]
[INFO] [stderr]     |          ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:660:37
[INFO] [stderr]     |
[INFO] [stderr] 660 |     check_err::<DecodeStruct>("[]", ExpectedError("Object".to_string(), "[]".to_string()));
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:232:14
[INFO] [stderr]     |
[INFO] [stderr] 232 |     Variant2(usize, f32),
[INFO] [stderr]     |              ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:232:21
[INFO] [stderr]     |
[INFO] [stderr] 232 |     Variant2(usize, f32),
[INFO] [stderr]     |                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:662:31
[INFO] [stderr]     |
[INFO] [stderr] 662 | ...                   ExpectedError("Number".to_string(), "true".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:664:31
[INFO] [stderr]     |
[INFO] [stderr] 664 | ...                   ExpectedError("Boolean".to_string(), "[]".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         a: i32,
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:666:31
[INFO] [stderr]     |
[INFO] [stderr] 666 | ...                   ExpectedError("String".to_string(), "{}".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:668:31
[INFO] [stderr]     |
[INFO] [stderr] 668 | ...                   ExpectedError("Array".to_string(), "null".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:670:31
[INFO] [stderr]     |
[INFO] [stderr] 670 | ...                   MissingFieldError("w".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:235:9
[INFO] [stderr]     |
[INFO] [stderr] 235 |         b: char,
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:675:29
[INFO] [stderr]     |
[INFO] [stderr] 675 | ...                   MissingFieldError("variant".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:677:29
[INFO] [stderr]     |
[INFO] [stderr] 677 | ...                   ExpectedError("String".to_string(), "1".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:679:29
[INFO] [stderr]     |
[INFO] [stderr] 679 | ...                   MissingFieldError("fields".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:681:29
[INFO] [stderr]     |
[INFO] [stderr] 681 | ...                   ExpectedError("Array".to_string(), "null".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:683:29
[INFO] [stderr]     |
[INFO] [stderr] 683 | ...                   UnknownVariantError("C".to_string()));
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:688:22
[INFO] [stderr]     |
[INFO] [stderr] 688 |     let json_value = from_str("{\"dog\" : \"cat\"}").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:695:22
[INFO] [stderr]     |
[INFO] [stderr] 695 |     let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:702:22
[INFO] [stderr]     |
[INFO] [stderr] 702 |     let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:709:22
[INFO] [stderr]     |
[INFO] [stderr] 709 |     let json_value = from_str("{\"animals\":[\"dog\",\"cat\",\"mouse\"]}").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:718:22
[INFO] [stderr]     |
[INFO] [stderr] 718 |     let json_value = from_str("{}").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:724:22
[INFO] [stderr]     |
[INFO] [stderr] 724 |     let json_value = from_str("{}").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:236:9
[INFO] [stderr]     |
[INFO] [stderr] 236 |         c: bool,
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:731:22
[INFO] [stderr]     |
[INFO] [stderr] 731 |     let json_value = from_str("[1, 2, 3]").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:737:22
[INFO] [stderr]     |
[INFO] [stderr] 737 |     let json_value = from_str("[1, 2, 3]").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:232:14
[INFO] [stderr]     |
[INFO] [stderr] 232 |     Variant2(usize, f32),
[INFO] [stderr]     |              ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:745:22
[INFO] [stderr]     |
[INFO] [stderr] 745 |     let json_value = from_str("\"dog\"").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:751:22
[INFO] [stderr]     |
[INFO] [stderr] 751 |     let json_value = from_str("\"dog\"").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:759:22
[INFO] [stderr]     |
[INFO] [stderr] 759 |     let json_value = from_str("12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:765:22
[INFO] [stderr]     |
[INFO] [stderr] 765 |     let json_value = from_str("-12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:232:21
[INFO] [stderr]     |
[INFO] [stderr] 232 |     Variant2(usize, f32),
[INFO] [stderr]     |                     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:768:22
[INFO] [stderr]     |
[INFO] [stderr] 768 |     let json_value = from_str("12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:771:22
[INFO] [stderr]     |
[INFO] [stderr] 771 |     let json_value = from_str("12.0").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:777:22
[INFO] [stderr]     |
[INFO] [stderr] 777 |     let json_value = from_str("12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:780:22
[INFO] [stderr]     |
[INFO] [stderr] 780 |     let json_value = from_str("-12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:783:22
[INFO] [stderr]     |
[INFO] [stderr] 783 |     let json_value = from_str("12.0").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:789:22
[INFO] [stderr]     |
[INFO] [stderr] 789 |     let json_value = from_str("12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:792:22
[INFO] [stderr]     |
[INFO] [stderr] 792 |     let json_value = from_str("-12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:795:22
[INFO] [stderr]     |
[INFO] [stderr] 795 |     let json_value = from_str("12.0").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:798:22
[INFO] [stderr]     |
[INFO] [stderr] 798 |     let json_value = from_str("-12.0").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         a: i32,
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:804:22
[INFO] [stderr]     |
[INFO] [stderr] 804 |     let json_value = from_str("-12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:811:22
[INFO] [stderr]     |
[INFO] [stderr] 811 |     let json_value = from_str("12").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:818:22
[INFO] [stderr]     |
[INFO] [stderr] 818 |     let json_value = from_str("12.0").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:825:22
[INFO] [stderr]     |
[INFO] [stderr] 825 |     let json_value = from_str("false").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:831:22
[INFO] [stderr]     |
[INFO] [stderr] 831 |     let json_value = from_str("false").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:839:22
[INFO] [stderr]     |
[INFO] [stderr] 839 |     let json_value = from_str("null").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:845:22
[INFO] [stderr]     |
[INFO] [stderr] 845 |     let json_value = from_str("null").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:858:32
[INFO] [stderr]     |
[INFO] [stderr] 858 |     write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:860:11
[INFO] [stderr]     |
[INFO] [stderr] 860 |     match from_str(json_str) {
[INFO] [stderr]     |           ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:873:32
[INFO] [stderr]     |
[INFO] [stderr] 873 |     write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:875:11
[INFO] [stderr]     |
[INFO] [stderr] 875 |     match from_str(json_str) {
[INFO] [stderr]     |           ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:235:9
[INFO] [stderr]     |
[INFO] [stderr] 235 |         b: char,
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/opaque.rs:236:9
[INFO] [stderr]     |
[INFO] [stderr] 236 |         c: bool,
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:888:38
[INFO] [stderr]     |
[INFO] [stderr] 888 |     tree.insert("hello".to_string(), String("guten tag".to_string()));
[INFO] [stderr]     |                                      ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:889:40
[INFO] [stderr]     |
[INFO] [stderr] 889 |     tree.insert("goodbye".to_string(), String("sayonara".to_string()));
[INFO] [stderr]     |                                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:891:16
[INFO] [stderr]     |
[INFO] [stderr] 891 |     let json = Array(
[INFO] [stderr]     |                ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:896:13
[INFO] [stderr]     |
[INFO] [stderr] 896 |             String("greetings".to_string()), // 1x
[INFO] [stderr]     |             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:897:13
[INFO] [stderr]     |
[INFO] [stderr] 897 |             Object(tree), // 1x + 2x + 2x + 1x
[INFO] [stderr]     |             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:912:17
[INFO] [stderr]     |
[INFO] [stderr] 912 |                 json::as_pretty_json(&json).indent(i)).unwrap();
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:929:9
[INFO] [stderr]     |
[INFO] [stderr] 929 |         from_str(printed).ok().expect("Pretty-printed JSON is invalid!");
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:944:18
[INFO] [stderr]     |
[INFO] [stderr] 944 |     let result = json::encode(&map).unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:946:37
[INFO] [stderr]     |
[INFO] [stderr] 946 |     let decoded: HashMap<Enum, _> = json::decode(&result).unwrap();
[INFO] [stderr]     |                                     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:936:51
[INFO] [stderr]     |
[INFO] [stderr] 936 |     #[derive(RustcEncodable, Eq, Hash, PartialEq, RustcDecodable, Debug)]
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:936:14
[INFO] [stderr]     |
[INFO] [stderr] 936 |     #[derive(RustcEncodable, Eq, Hash, PartialEq, RustcDecodable, Debug)]
[INFO] [stderr]     |              ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:954:26
[INFO] [stderr]     |
[INFO] [stderr] 954 |     let json_obj = match from_str(json_str) {
[INFO] [stderr]     |                          ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:958:23
[INFO] [stderr]     |
[INFO] [stderr] 958 |     let mut decoder = Decoder::new(json_obj);
[INFO] [stderr]     |                       ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 60 previous errors
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:959:37
[INFO] [stderr]     |
[INFO] [stderr] 959 |     let _hm: HashMap<usize, bool> = Decodable::decode(&mut decoder).unwrap();
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:966:26
[INFO] [stderr]     |
[INFO] [stderr] 966 |     let json_obj = match from_str(json_str) {
[INFO] [stderr]     |                          ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:970:23
[INFO] [stderr]     |
[INFO] [stderr] 970 |     let mut decoder = Decoder::new(json_obj);
[INFO] [stderr]     |                       ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:971:62
[INFO] [stderr]     |
[INFO] [stderr] 971 |     let result: Result<HashMap<usize, bool>, DecoderError> = Decodable::decode(&mut decoder);
[INFO] [stderr]     |                                                              ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:971:46
[INFO] [stderr]     |
[INFO] [stderr] 971 |     let result: Result<HashMap<usize, bool>, DecoderError> = Decodable::decode(&mut decoder);
[INFO] [stderr]     |                                              ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:972:28
[INFO] [stderr]     |
[INFO] [stderr] 972 |     assert_eq!(result, Err(ExpectedError("Number".to_string(), "a".to_string())));
[INFO] [stderr]     |                            ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:997:14
[INFO] [stderr]     |
[INFO] [stderr] 997 |             (ObjectStart,             vec![]),
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:998:16
[INFO] [stderr]     |
[INFO] [stderr] 998 |               (StringValue("bar".to_string()),   vec![StackElement::Key("foo")]),
[INFO] [stderr]     |                ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:998:55
[INFO] [stderr]     |
[INFO] [stderr] 998 |               (StringValue("bar".to_string()),   vec![StackElement::Key("foo")]),
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:999:16
[INFO] [stderr]     |
[INFO] [stderr] 999 |               (ArrayStart,            vec![StackElement::Key("array")]),
[INFO] [stderr]     |                ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:999:44
[INFO] [stderr]     |
[INFO] [stderr] 999 |               (ArrayStart,            vec![StackElement::Key("array")]),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1000:18
[INFO] [stderr]      |
[INFO] [stderr] 1000 |                 (U64Value(0),         vec![StackElement::Key("array"), StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1000:44
[INFO] [stderr]      |
[INFO] [stderr] 1000 |                 (U64Value(0),         vec![StackElement::Key("array"), StackElement::Index(0)]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1000:72
[INFO] [stderr]      |
[INFO] [stderr] 1000 |                 (U64Value(0),         vec![StackElement::Key("array"), StackElement::Index(0)]),
[INFO] [stderr]      |                                                                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1001:18
[INFO] [stderr]      |
[INFO] [stderr] 1001 |                 (U64Value(1),         vec![StackElement::Key("array"), StackElement::Index(1)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1001:44
[INFO] [stderr]      |
[INFO] [stderr] 1001 |                 (U64Value(1),         vec![StackElement::Key("array"), StackElement::Index(1)]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1001:72
[INFO] [stderr]      |
[INFO] [stderr] 1001 |                 (U64Value(1),         vec![StackElement::Key("array"), StackElement::Index(1)]),
[INFO] [stderr]      |                                                                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1002:18
[INFO] [stderr]      |
[INFO] [stderr] 1002 |                 (U64Value(2),         vec![StackElement::Key("array"), StackElement::Index(2)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1002:44
[INFO] [stderr]      |
[INFO] [stderr] 1002 |                 (U64Value(2),         vec![StackElement::Key("array"), StackElement::Index(2)]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1002:72
[INFO] [stderr]      |
[INFO] [stderr] 1002 |                 (U64Value(2),         vec![StackElement::Key("array"), StackElement::Index(2)]),
[INFO] [stderr]      |                                                                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1003:18
[INFO] [stderr]      |
[INFO] [stderr] 1003 |                 (U64Value(3),         vec![StackElement::Key("array"), StackElement::Index(3)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1003:44
[INFO] [stderr]      |
[INFO] [stderr] 1003 |                 (U64Value(3),         vec![StackElement::Key("array"), StackElement::Index(3)]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rustc-ap-serialize`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1003:72
[INFO] [stderr]      |
[INFO] [stderr] 1003 |                 (U64Value(3),         vec![StackElement::Key("array"), StackElement::Index(3)]),
[INFO] [stderr]      |                                                                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1004:18
[INFO] [stderr]      |
[INFO] [stderr] 1004 |                 (U64Value(4),         vec![StackElement::Key("array"), StackElement::Index(4)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1004:44
[INFO] [stderr]      |
[INFO] [stderr] 1004 |                 (U64Value(4),         vec![StackElement::Key("array"), StackElement::Index(4)]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1004:72
[INFO] [stderr]      |
[INFO] [stderr] 1004 |                 (U64Value(4),         vec![StackElement::Key("array"), StackElement::Index(4)]),
[INFO] [stderr]      |                                                                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1005:18
[INFO] [stderr]      |
[INFO] [stderr] 1005 |                 (U64Value(5),         vec![StackElement::Key("array"), StackElement::Index(5)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1005:44
[INFO] [stderr]      |
[INFO] [stderr] 1005 |                 (U64Value(5),         vec![StackElement::Key("array"), StackElement::Index(5)]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1005:72
[INFO] [stderr]      |
[INFO] [stderr] 1005 |                 (U64Value(5),         vec![StackElement::Key("array"), StackElement::Index(5)]),
[INFO] [stderr]      |                                                                        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1006:16
[INFO] [stderr]      |
[INFO] [stderr] 1006 |               (ArrayEnd,              vec![StackElement::Key("array")]),
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1006:44
[INFO] [stderr]      |
[INFO] [stderr] 1006 |               (ArrayEnd,              vec![StackElement::Key("array")]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1007:16
[INFO] [stderr]      |
[INFO] [stderr] 1007 |               (ArrayStart,            vec![StackElement::Key("idents")]),
[INFO] [stderr]      |                ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1007:44
[INFO] [stderr]      |
[INFO] [stderr] 1007 |               (ArrayStart,            vec![StackElement::Key("idents")]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1008:18
[INFO] [stderr]      |
[INFO] [stderr] 1008 |                 (NullValue,           vec![StackElement::Key("idents"),
[INFO] [stderr]      |                  ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1008:44
[INFO] [stderr]      |
[INFO] [stderr] 1008 |                 (NullValue,           vec![StackElement::Key("idents"),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1009:44
[INFO] [stderr]      |
[INFO] [stderr] 1009 | ...                   StackElement::Index(0)...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1010:18
[INFO] [stderr]      |
[INFO] [stderr] 1010 |                 (BooleanValue(true),  vec![StackElement::Key("idents"),
[INFO] [stderr]      |                  ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1010:44
[INFO] [stderr]      |
[INFO] [stderr] 1010 |                 (BooleanValue(true),  vec![StackElement::Key("idents"),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1011:44
[INFO] [stderr]      |
[INFO] [stderr] 1011 | ...                   StackElement::Index(1)...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1012:18
[INFO] [stderr]      |
[INFO] [stderr] 1012 |                 (BooleanValue(false), vec![StackElement::Key("idents"),
[INFO] [stderr]      |                  ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1012:44
[INFO] [stderr]      |
[INFO] [stderr] 1012 |                 (BooleanValue(false), vec![StackElement::Key("idents"),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1013:44
[INFO] [stderr]      |
[INFO] [stderr] 1013 | ...                   StackElement::Index(2)...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1014:16
[INFO] [stderr]      |
[INFO] [stderr] 1014 |               (ArrayEnd,              vec![StackElement::Key("idents")]),
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1014:44
[INFO] [stderr]      |
[INFO] [stderr] 1014 |               (ArrayEnd,              vec![StackElement::Key("idents")]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1015:14
[INFO] [stderr]      |
[INFO] [stderr] 1015 |             (ObjectEnd,               vec![]),
[INFO] [stderr]      |              ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1032:39
[INFO] [stderr]      |
[INFO] [stderr] 1032 |     assert_eq!(last_event("{ "),      Error(SyntaxError(EOFWhileParsingObject, 1, 3)));
[INFO] [stderr]      |                                       ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1032:45
[INFO] [stderr]      |
[INFO] [stderr] 1032 |     assert_eq!(last_event("{ "),      Error(SyntaxError(EOFWhileParsingObject, 1, 3)));
[INFO] [stderr]      |                                             ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1032:57
[INFO] [stderr]      |
[INFO] [stderr] 1032 |     assert_eq!(last_event("{ "),      Error(SyntaxError(EOFWhileParsingObject, 1, 3)));
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1033:39
[INFO] [stderr]      |
[INFO] [stderr] 1033 |     assert_eq!(last_event("{1"),      Error(SyntaxError(KeyMustBeAString,      1, 2)));
[INFO] [stderr]      |                                       ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1033:45
[INFO] [stderr]      |
[INFO] [stderr] 1033 |     assert_eq!(last_event("{1"),      Error(SyntaxError(KeyMustBeAString,      1, 2)));
[INFO] [stderr]      |                                             ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1033:57
[INFO] [stderr]      |
[INFO] [stderr] 1033 |     assert_eq!(last_event("{1"),      Error(SyntaxError(KeyMustBeAString,      1, 2)));
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1034:39
[INFO] [stderr]      |
[INFO] [stderr] 1034 |     assert_eq!(last_event("{ \"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]      |                                       ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1034:45
[INFO] [stderr]      |
[INFO] [stderr] 1034 |     assert_eq!(last_event("{ \"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]      |                                             ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1034:57
[INFO] [stderr]      |
[INFO] [stderr] 1034 |     assert_eq!(last_event("{ \"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1035:39
[INFO] [stderr]      |
[INFO] [stderr] 1035 |     assert_eq!(last_event("{\"a\""),  Error(SyntaxError(EOFWhileParsingObject, 1, 5)));
[INFO] [stderr]      |                                       ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1035:45
[INFO] [stderr]      |
[INFO] [stderr] 1035 |     assert_eq!(last_event("{\"a\""),  Error(SyntaxError(EOFWhileParsingObject, 1, 5)));
[INFO] [stderr]      |                                             ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1035:57
[INFO] [stderr]      |
[INFO] [stderr] 1035 |     assert_eq!(last_event("{\"a\""),  Error(SyntaxError(EOFWhileParsingObject, 1, 5)));
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1036:39
[INFO] [stderr]      |
[INFO] [stderr] 1036 |     assert_eq!(last_event("{\"a\" "), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]      |                                       ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1036:45
[INFO] [stderr]      |
[INFO] [stderr] 1036 |     assert_eq!(last_event("{\"a\" "), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]      |                                             ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1036:57
[INFO] [stderr]      |
[INFO] [stderr] 1036 |     assert_eq!(last_event("{\"a\" "), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1038:42
[INFO] [stderr]      |
[INFO] [stderr] 1038 |     assert_eq!(last_event("{\"a\" 1"),   Error(SyntaxError(ExpectedColon,         1, 6)));
[INFO] [stderr]      |                                          ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1038:48
[INFO] [stderr]      |
[INFO] [stderr] 1038 |     assert_eq!(last_event("{\"a\" 1"),   Error(SyntaxError(ExpectedColon,         1, 6)));
[INFO] [stderr]      |                                                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1038:60
[INFO] [stderr]      |
[INFO] [stderr] 1038 |     assert_eq!(last_event("{\"a\" 1"),   Error(SyntaxError(ExpectedColon,         1, 6)));
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1039:42
[INFO] [stderr]      |
[INFO] [stderr] 1039 |     assert_eq!(last_event("{\"a\":"),    Error(SyntaxError(EOFWhileParsingValue,  1, 6)));
[INFO] [stderr]      |                                          ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1039:48
[INFO] [stderr]      |
[INFO] [stderr] 1039 |     assert_eq!(last_event("{\"a\":"),    Error(SyntaxError(EOFWhileParsingValue,  1, 6)));
[INFO] [stderr]      |                                                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1039:60
[INFO] [stderr]      |
[INFO] [stderr] 1039 |     assert_eq!(last_event("{\"a\":"),    Error(SyntaxError(EOFWhileParsingValue,  1, 6)));
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1040:42
[INFO] [stderr]      |
[INFO] [stderr] 1040 |     assert_eq!(last_event("{\"a\":1"),   Error(SyntaxError(EOFWhileParsingObject, 1, 7)));
[INFO] [stderr]      |                                          ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1040:48
[INFO] [stderr]      |
[INFO] [stderr] 1040 |     assert_eq!(last_event("{\"a\":1"),   Error(SyntaxError(EOFWhileParsingObject, 1, 7)));
[INFO] [stderr]      |                                                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1040:60
[INFO] [stderr]      |
[INFO] [stderr] 1040 |     assert_eq!(last_event("{\"a\":1"),   Error(SyntaxError(EOFWhileParsingObject, 1, 7)));
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1041:42
[INFO] [stderr]      |
[INFO] [stderr] 1041 |     assert_eq!(last_event("{\"a\":1 1"), Error(SyntaxError(InvalidSyntax,         1, 8)));
[INFO] [stderr]      |                                          ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1041:48
[INFO] [stderr]      |
[INFO] [stderr] 1041 |     assert_eq!(last_event("{\"a\":1 1"), Error(SyntaxError(InvalidSyntax,         1, 8)));
[INFO] [stderr]      |                                                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1041:60
[INFO] [stderr]      |
[INFO] [stderr] 1041 |     assert_eq!(last_event("{\"a\":1 1"), Error(SyntaxError(InvalidSyntax,         1, 8)));
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1042:42
[INFO] [stderr]      |
[INFO] [stderr] 1042 |     assert_eq!(last_event("{\"a\":1,"),  Error(SyntaxError(EOFWhileParsingObject, 1, 8)));
[INFO] [stderr]      |                                          ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1042:48
[INFO] [stderr]      |
[INFO] [stderr] 1042 |     assert_eq!(last_event("{\"a\":1,"),  Error(SyntaxError(EOFWhileParsingObject, 1, 8)));
[INFO] [stderr]      |                                                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1042:60
[INFO] [stderr]      |
[INFO] [stderr] 1042 |     assert_eq!(last_event("{\"a\":1,"),  Error(SyntaxError(EOFWhileParsingObject, 1, 8)));
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1043:42
[INFO] [stderr]      |
[INFO] [stderr] 1043 |     assert_eq!(last_event("{\"a\":1,}"), Error(SyntaxError(TrailingComma, 1, 8)));
[INFO] [stderr]      |                                          ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1043:48
[INFO] [stderr]      |
[INFO] [stderr] 1043 |     assert_eq!(last_event("{\"a\":1,}"), Error(SyntaxError(TrailingComma, 1, 8)));
[INFO] [stderr]      |                                                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1043:60
[INFO] [stderr]      |
[INFO] [stderr] 1043 |     assert_eq!(last_event("{\"a\":1,}"), Error(SyntaxError(TrailingComma, 1, 8)));
[INFO] [stderr]      |                                                            ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1047:15
[INFO] [stderr]      |
[INFO] [stderr] 1047 |         vec![(ObjectStart, vec![]), (ObjectEnd, vec![])]
[INFO] [stderr]      |               ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1047:38
[INFO] [stderr]      |
[INFO] [stderr] 1047 |         vec![(ObjectStart, vec![]), (ObjectEnd, vec![])]
[INFO] [stderr]      |                                      ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1052:14
[INFO] [stderr]      |
[INFO] [stderr] 1052 |             (ObjectStart,        vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1053:16
[INFO] [stderr]      |
[INFO] [stderr] 1053 |               (U64Value(3),      vec![StackElement::Key("a")]),
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1053:39
[INFO] [stderr]      |
[INFO] [stderr] 1053 |               (U64Value(3),      vec![StackElement::Key("a")]),
[INFO] [stderr]      |                                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1054:14
[INFO] [stderr]      |
[INFO] [stderr] 1054 |             (ObjectEnd,          vec![]),
[INFO] [stderr]      |              ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1060:14
[INFO] [stderr]      |
[INFO] [stderr] 1060 |             (ObjectStart,           vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1061:16
[INFO] [stderr]      |
[INFO] [stderr] 1061 |               (NullValue,           vec![StackElement::Key("a")]),
[INFO] [stderr]      |                ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1061:42
[INFO] [stderr]      |
[INFO] [stderr] 1061 |               (NullValue,           vec![StackElement::Key("a")]),
[INFO] [stderr]      |                                          ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1062:16
[INFO] [stderr]      |
[INFO] [stderr] 1062 |               (BooleanValue(true),  vec![StackElement::Key("b")]),
[INFO] [stderr]      |                ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1062:42
[INFO] [stderr]      |
[INFO] [stderr] 1062 |               (BooleanValue(true),  vec![StackElement::Key("b")]),
[INFO] [stderr]      |                                          ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1063:14
[INFO] [stderr]      |
[INFO] [stderr] 1063 |             (ObjectEnd,             vec![]),
[INFO] [stderr]      |              ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1069:14
[INFO] [stderr]      |
[INFO] [stderr] 1069 |             (ObjectStart,           vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1070:16
[INFO] [stderr]      |
[INFO] [stderr] 1070 |               (F64Value(1.0),       vec![StackElement::Key("a")]),
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1070:42
[INFO] [stderr]      |
[INFO] [stderr] 1070 |               (F64Value(1.0),       vec![StackElement::Key("a")]),
[INFO] [stderr]      |                                          ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1071:16
[INFO] [stderr]      |
[INFO] [stderr] 1071 |               (ArrayStart,          vec![StackElement::Key("b")]),
[INFO] [stderr]      |                ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1071:42
[INFO] [stderr]      |
[INFO] [stderr] 1071 |               (ArrayStart,          vec![StackElement::Key("b")]),
[INFO] [stderr]      |                                          ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1072:18
[INFO] [stderr]      |
[INFO] [stderr] 1072 |                 (BooleanValue(true),vec![StackElement::Key("b"), StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1072:42
[INFO] [stderr]      |
[INFO] [stderr] 1072 |                 (BooleanValue(true),vec![StackElement::Key("b"), StackElement::Index(0)]),
[INFO] [stderr]      |                                          ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1072:66
[INFO] [stderr]      |
[INFO] [stderr] 1072 |                 (BooleanValue(true),vec![StackElement::Key("b"), StackElement::Index(0)]),
[INFO] [stderr]      |                                                                  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1073:16
[INFO] [stderr]      |
[INFO] [stderr] 1073 |               (ArrayEnd,            vec![StackElement::Key("b")]),
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1073:42
[INFO] [stderr]      |
[INFO] [stderr] 1073 |               (ArrayEnd,            vec![StackElement::Key("b")]),
[INFO] [stderr]      |                                          ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1074:14
[INFO] [stderr]      |
[INFO] [stderr] 1074 |             (ObjectEnd,             vec![]),
[INFO] [stderr]      |              ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1087:14
[INFO] [stderr]      |
[INFO] [stderr] 1087 |             (ObjectStart,                   vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1088:16
[INFO] [stderr]      |
[INFO] [stderr] 1088 |               (F64Value(1.0),               vec![StackElement::Key("a")]),
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1088:50
[INFO] [stderr]      |
[INFO] [stderr] 1088 |               (F64Value(1.0),               vec![StackElement::Key("a")]),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1089:16
[INFO] [stderr]      |
[INFO] [stderr] 1089 |               (ArrayStart,                  vec![StackElement::Key("b")]),
[INFO] [stderr]      |                ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1089:50
[INFO] [stderr]      |
[INFO] [stderr] 1089 |               (ArrayStart,                  vec![StackElement::Key("b")]),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1090:18
[INFO] [stderr]      |
[INFO] [stderr] 1090 |                 (BooleanValue(true),        vec![StackElement::Key("b"),
[INFO] [stderr]      |                  ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1090:50
[INFO] [stderr]      |
[INFO] [stderr] 1090 |                 (BooleanValue(true),        vec![StackElement::Key("b"),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1091:49
[INFO] [stderr]      |
[INFO] [stderr] 1091 | ...                   StackElement::Index(0)...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1092:18
[INFO] [stderr]      |
[INFO] [stderr] 1092 |                 (StringValue("foo\nbar".to_string()),  vec![StackElement::Key("b"),
[INFO] [stderr]      |                  ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1092:61
[INFO] [stderr]      |
[INFO] [stderr] 1092 |                 (StringValue("foo\nbar".to_string()),  vec![StackElement::Key("b"),
[INFO] [stderr]      |                                                             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1093:61
[INFO] [stderr]      |
[INFO] [stderr] 1093 | ...                   StackElement::Index(1)...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1094:18
[INFO] [stderr]      |
[INFO] [stderr] 1094 |                 (ObjectStart,               vec![StackElement::Key("b"),
[INFO] [stderr]      |                  ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1094:50
[INFO] [stderr]      |
[INFO] [stderr] 1094 |                 (ObjectStart,               vec![StackElement::Key("b"),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1095:50
[INFO] [stderr]      |
[INFO] [stderr] 1095 | ...                   StackElement::Index(2)...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1096:20
[INFO] [stderr]      |
[INFO] [stderr] 1096 |                   (ObjectStart,             vec![StackElement::Key("b"),
[INFO] [stderr]      |                    ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1096:50
[INFO] [stderr]      |
[INFO] [stderr] 1096 |                   (ObjectStart,             vec![StackElement::Key("b"),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1097:50
[INFO] [stderr]      |
[INFO] [stderr] 1097 | ...                   StackElement::Index(2),
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1098:50
[INFO] [stderr]      |
[INFO] [stderr] 1098 | ...                   StackElement::Key("c")]),
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1099:22
[INFO] [stderr]      |
[INFO] [stderr] 1099 |                     (NullValue,             vec![StackElement::Key("b"),
[INFO] [stderr]      |                      ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1099:50
[INFO] [stderr]      |
[INFO] [stderr] 1099 |                     (NullValue,             vec![StackElement::Key("b"),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1100:50
[INFO] [stderr]      |
[INFO] [stderr] 1100 | ...                   StackElement::Index(2),
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1101:50
[INFO] [stderr]      |
[INFO] [stderr] 1101 | ...                   StackElement::Key("c...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1102:50
[INFO] [stderr]      |
[INFO] [stderr] 1102 | ...                   StackElement::Key("d")]),
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1103:20
[INFO] [stderr]      |
[INFO] [stderr] 1103 |                   (ObjectEnd,               vec![StackElement::Key("b"),
[INFO] [stderr]      |                    ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1103:50
[INFO] [stderr]      |
[INFO] [stderr] 1103 |                   (ObjectEnd,               vec![StackElement::Key("b"),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1104:50
[INFO] [stderr]      |
[INFO] [stderr] 1104 | ...                   StackElement::Index(2),
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1105:50
[INFO] [stderr]      |
[INFO] [stderr] 1105 | ...                   StackElement::Key("c")]),
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1106:18
[INFO] [stderr]      |
[INFO] [stderr] 1106 |                 (ObjectEnd,                 vec![StackElement::Key("b"),
[INFO] [stderr]      |                  ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1106:50
[INFO] [stderr]      |
[INFO] [stderr] 1106 |                 (ObjectEnd,                 vec![StackElement::Key("b"),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1107:50
[INFO] [stderr]      |
[INFO] [stderr] 1107 | ...                   StackElement::Index(2)...
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1108:16
[INFO] [stderr]      |
[INFO] [stderr] 1108 |               (ArrayEnd,                    vec![StackElement::Key("b")]),
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1108:50
[INFO] [stderr]      |
[INFO] [stderr] 1108 |               (ArrayEnd,                    vec![StackElement::Key("b")]),
[INFO] [stderr]      |                                                  ^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1109:14
[INFO] [stderr]      |
[INFO] [stderr] 1109 |             (ObjectEnd,                     vec![]),
[INFO] [stderr]      |              ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1118:14
[INFO] [stderr]      |
[INFO] [stderr] 1118 |             (ArrayStart, vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1119:14
[INFO] [stderr]      |
[INFO] [stderr] 1119 |             (ArrayEnd,   vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1125:14
[INFO] [stderr]      |
[INFO] [stderr] 1125 |             (ArrayStart, vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1126:14
[INFO] [stderr]      |
[INFO] [stderr] 1126 |             (ArrayEnd,   vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1132:14
[INFO] [stderr]      |
[INFO] [stderr] 1132 |             (ArrayStart,             vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1133:18
[INFO] [stderr]      |
[INFO] [stderr] 1133 |                 (BooleanValue(true), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1133:43
[INFO] [stderr]      |
[INFO] [stderr] 1133 |                 (BooleanValue(true), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                                           ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1134:14
[INFO] [stderr]      |
[INFO] [stderr] 1134 |             (ArrayEnd,               vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1140:14
[INFO] [stderr]      |
[INFO] [stderr] 1140 |             (ArrayStart,              vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1141:18
[INFO] [stderr]      |
[INFO] [stderr] 1141 |                 (BooleanValue(false), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1141:44
[INFO] [stderr]      |
[INFO] [stderr] 1141 |                 (BooleanValue(false), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                                            ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1142:14
[INFO] [stderr]      |
[INFO] [stderr] 1142 |             (ArrayEnd,                vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1148:14
[INFO] [stderr]      |
[INFO] [stderr] 1148 |             (ArrayStart,    vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1149:18
[INFO] [stderr]      |
[INFO] [stderr] 1149 |                 (NullValue, vec![StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1149:34
[INFO] [stderr]      |
[INFO] [stderr] 1149 |                 (NullValue, vec![StackElement::Index(0)]),
[INFO] [stderr]      |                                  ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1150:14
[INFO] [stderr]      |
[INFO] [stderr] 1150 |             (ArrayEnd,      vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1156:14
[INFO] [stderr]      |
[INFO] [stderr] 1156 |             (ArrayStart,      vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1157:18
[INFO] [stderr]      |
[INFO] [stderr] 1157 |                 (U64Value(3), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1157:36
[INFO] [stderr]      |
[INFO] [stderr] 1157 |                 (U64Value(3), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1158:18
[INFO] [stderr]      |
[INFO] [stderr] 1158 |                 (U64Value(1), vec![StackElement::Index(1)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1158:36
[INFO] [stderr]      |
[INFO] [stderr] 1158 |                 (U64Value(1), vec![StackElement::Index(1)]),
[INFO] [stderr]      |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1159:14
[INFO] [stderr]      |
[INFO] [stderr] 1159 |             (ArrayEnd,        vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1165:14
[INFO] [stderr]      |
[INFO] [stderr] 1165 |             (ArrayStart,      vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1166:18
[INFO] [stderr]      |
[INFO] [stderr] 1166 |                 (U64Value(3), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1166:36
[INFO] [stderr]      |
[INFO] [stderr] 1166 |                 (U64Value(3), vec![StackElement::Index(0)]),
[INFO] [stderr]      |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1167:18
[INFO] [stderr]      |
[INFO] [stderr] 1167 |                 (U64Value(2), vec![StackElement::Index(1)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1167:36
[INFO] [stderr]      |
[INFO] [stderr] 1167 |                 (U64Value(2), vec![StackElement::Index(1)]),
[INFO] [stderr]      |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1168:14
[INFO] [stderr]      |
[INFO] [stderr] 1168 |             (ArrayEnd,        vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1174:14
[INFO] [stderr]      |
[INFO] [stderr] 1174 |             (ArrayStart,           vec![]),
[INFO] [stderr]      |              ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1175:18
[INFO] [stderr]      |
[INFO] [stderr] 1175 |                 (U64Value(2),      vec![StackElement::Index(0)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1175:41
[INFO] [stderr]      |
[INFO] [stderr] 1175 |                 (U64Value(2),      vec![StackElement::Index(0)]),
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1176:18
[INFO] [stderr]      |
[INFO] [stderr] 1176 |                 (ArrayStart,       vec![StackElement::Index(1)]),
[INFO] [stderr]      |                  ^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1176:41
[INFO] [stderr]      |
[INFO] [stderr] 1176 |                 (ArrayStart,       vec![StackElement::Index(1)]),
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1177:22
[INFO] [stderr]      |
[INFO] [stderr] 1177 |                     (U64Value(4),  vec![StackElement::Index(1), StackElement::Index(0)]),
[INFO] [stderr]      |                      ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1177:41
[INFO] [stderr]      |
[INFO] [stderr] 1177 |                     (U64Value(4),  vec![StackElement::Index(1), StackElement::Index(0)]),
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1177:65
[INFO] [stderr]      |
[INFO] [stderr] 1177 |                     (U64Value(4),  vec![StackElement::Index(1), StackElement::Index(0)]),
[INFO] [stderr]      |                                                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1178:22
[INFO] [stderr]      |
[INFO] [stderr] 1178 |                     (U64Value(1),  vec![StackElement::Index(1), StackElement::Index(1)]),
[INFO] [stderr]      |                      ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1178:41
[INFO] [stderr]      |
[INFO] [stderr] 1178 |                     (U64Value(1),  vec![StackElement::Index(1), StackElement::Index(1)]),
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1178:65
[INFO] [stderr]      |
[INFO] [stderr] 1178 |                     (U64Value(1),  vec![StackElement::Index(1), StackElement::Index(1)]),
[INFO] [stderr]      |                                                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1179:18
[INFO] [stderr]      |
[INFO] [stderr] 1179 |                 (ArrayEnd,         vec![StackElement::Index(1)]),
[INFO] [stderr]      |                  ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1179:41
[INFO] [stderr]      |
[INFO] [stderr] 1179 |                 (ArrayEnd,         vec![StackElement::Index(1)]),
[INFO] [stderr]      |                                         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1180:14
[INFO] [stderr]      |
[INFO] [stderr] 1180 |             (ArrayEnd,             vec![]),
[INFO] [stderr]      |              ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1184:33
[INFO] [stderr]      |
[INFO] [stderr] 1184 |     assert_eq!(last_event("["), Error(SyntaxError(EOFWhileParsingValue, 1,  2)));
[INFO] [stderr]      |                                 ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1184:39
[INFO] [stderr]      |
[INFO] [stderr] 1184 |     assert_eq!(last_event("["), Error(SyntaxError(EOFWhileParsingValue, 1,  2)));
[INFO] [stderr]      |                                       ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1184:51
[INFO] [stderr]      |
[INFO] [stderr] 1184 |     assert_eq!(last_event("["), Error(SyntaxError(EOFWhileParsingValue, 1,  2)));
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1186:16
[INFO] [stderr]      |
[INFO] [stderr] 1186 |     assert_eq!(from_str("["),     Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1186:39
[INFO] [stderr]      |
[INFO] [stderr] 1186 |     assert_eq!(from_str("["),     Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
[INFO] [stderr]      |                                       ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1186:51
[INFO] [stderr]      |
[INFO] [stderr] 1186 |     assert_eq!(from_str("["),     Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1187:16
[INFO] [stderr]      |
[INFO] [stderr] 1187 |     assert_eq!(from_str("[1"),    Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1187:39
[INFO] [stderr]      |
[INFO] [stderr] 1187 |     assert_eq!(from_str("[1"),    Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
[INFO] [stderr]      |                                       ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1187:51
[INFO] [stderr]      |
[INFO] [stderr] 1187 |     assert_eq!(from_str("[1"),    Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1188:16
[INFO] [stderr]      |
[INFO] [stderr] 1188 |     assert_eq!(from_str("[1,"),   Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1188:39
[INFO] [stderr]      |
[INFO] [stderr] 1188 |     assert_eq!(from_str("[1,"),   Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
[INFO] [stderr]      |                                       ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1188:51
[INFO] [stderr]      |
[INFO] [stderr] 1188 |     assert_eq!(from_str("[1,"),   Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1189:16
[INFO] [stderr]      |
[INFO] [stderr] 1189 |     assert_eq!(from_str("[1,]"),  Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1189:39
[INFO] [stderr]      |
[INFO] [stderr] 1189 |     assert_eq!(from_str("[1,]"),  Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]      |                                       ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1189:51
[INFO] [stderr]      |
[INFO] [stderr] 1189 |     assert_eq!(from_str("[1,]"),  Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1190:16
[INFO] [stderr]      |
[INFO] [stderr] 1190 |     assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]      |                ^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1190:39
[INFO] [stderr]      |
[INFO] [stderr] 1190 |     assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]      |                                       ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1190:51
[INFO] [stderr]      |
[INFO] [stderr] 1190 |     assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax,        1, 4)));
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1195:38
[INFO] [stderr]      |
[INFO] [stderr] 1195 |     assert_eq!(last_event("nulla"),  Error(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]      |                                      ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1195:44
[INFO] [stderr]      |
[INFO] [stderr] 1195 |     assert_eq!(last_event("nulla"),  Error(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]      |                                            ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1195:56
[INFO] [stderr]      |
[INFO] [stderr] 1195 |     assert_eq!(last_event("nulla"),  Error(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]      |                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1196:38
[INFO] [stderr]      |
[INFO] [stderr] 1196 |     assert_eq!(last_event("truea"),  Error(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]      |                                      ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1196:44
[INFO] [stderr]      |
[INFO] [stderr] 1196 |     assert_eq!(last_event("truea"),  Error(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]      |                                            ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1196:56
[INFO] [stderr]      |
[INFO] [stderr] 1196 |     assert_eq!(last_event("truea"),  Error(SyntaxError(TrailingCharacters, 1, 5)));
[INFO] [stderr]      |                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1197:38
[INFO] [stderr]      |
[INFO] [stderr] 1197 |     assert_eq!(last_event("falsea"), Error(SyntaxError(TrailingCharacters, 1, 6)));
[INFO] [stderr]      |                                      ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1197:44
[INFO] [stderr]      |
[INFO] [stderr] 1197 |     assert_eq!(last_event("falsea"), Error(SyntaxError(TrailingCharacters, 1, 6)));
[INFO] [stderr]      |                                            ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1197:56
[INFO] [stderr]      |
[INFO] [stderr] 1197 |     assert_eq!(last_event("falsea"), Error(SyntaxError(TrailingCharacters, 1, 6)));
[INFO] [stderr]      |                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1198:38
[INFO] [stderr]      |
[INFO] [stderr] 1198 |     assert_eq!(last_event("1a"),     Error(SyntaxError(TrailingCharacters, 1, 2)));
[INFO] [stderr]      |                                      ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1198:44
[INFO] [stderr]      |
[INFO] [stderr] 1198 |     assert_eq!(last_event("1a"),     Error(SyntaxError(TrailingCharacters, 1, 2)));
[INFO] [stderr]      |                                            ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1198:56
[INFO] [stderr]      |
[INFO] [stderr] 1198 |     assert_eq!(last_event("1a"),     Error(SyntaxError(TrailingCharacters, 1, 2)));
[INFO] [stderr]      |                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1199:38
[INFO] [stderr]      |
[INFO] [stderr] 1199 |     assert_eq!(last_event("[]a"),    Error(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]      |                                      ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1199:44
[INFO] [stderr]      |
[INFO] [stderr] 1199 |     assert_eq!(last_event("[]a"),    Error(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]      |                                            ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1199:56
[INFO] [stderr]      |
[INFO] [stderr] 1199 |     assert_eq!(last_event("[]a"),    Error(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]      |                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1200:38
[INFO] [stderr]      |
[INFO] [stderr] 1200 |     assert_eq!(last_event("{}a"),    Error(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]      |                                      ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1200:44
[INFO] [stderr]      |
[INFO] [stderr] 1200 |     assert_eq!(last_event("{}a"),    Error(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]      |                                            ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1200:56
[INFO] [stderr]      |
[INFO] [stderr] 1200 |     assert_eq!(last_event("{}a"),    Error(SyntaxError(TrailingCharacters, 1, 3)));
[INFO] [stderr]      |                                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1204:16
[INFO] [stderr]      |
[INFO] [stderr] 1204 |     assert_eq!(Parser::new("null".chars()).next(), Some(NullValue));
[INFO] [stderr]      |                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1204:57
[INFO] [stderr]      |
[INFO] [stderr] 1204 |     assert_eq!(Parser::new("null".chars()).next(), Some(NullValue));
[INFO] [stderr]      |                                                         ^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1205:16
[INFO] [stderr]      |
[INFO] [stderr] 1205 |     assert_eq!(Parser::new("true".chars()).next(), Some(BooleanValue(true)));
[INFO] [stderr]      |                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1205:57
[INFO] [stderr]      |
[INFO] [stderr] 1205 |     assert_eq!(Parser::new("true".chars()).next(), Some(BooleanValue(true)));
[INFO] [stderr]      |                                                         ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1206:16
[INFO] [stderr]      |
[INFO] [stderr] 1206 |     assert_eq!(Parser::new("false".chars()).next(), Some(BooleanValue(false)));
[INFO] [stderr]      |                ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1206:58
[INFO] [stderr]      |
[INFO] [stderr] 1206 |     assert_eq!(Parser::new("false".chars()).next(), Some(BooleanValue(false)));
[INFO] [stderr]      |                                                          ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1208:36
[INFO] [stderr]      |
[INFO] [stderr] 1208 |     assert_eq!(last_event("n"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                    ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1208:42
[INFO] [stderr]      |
[INFO] [stderr] 1208 |     assert_eq!(last_event("n"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                          ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1208:54
[INFO] [stderr]      |
[INFO] [stderr] 1208 |     assert_eq!(last_event("n"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                                      ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1209:36
[INFO] [stderr]      |
[INFO] [stderr] 1209 |     assert_eq!(last_event("nul"),  Error(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]      |                                    ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1209:42
[INFO] [stderr]      |
[INFO] [stderr] 1209 |     assert_eq!(last_event("nul"),  Error(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]      |                                          ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1209:54
[INFO] [stderr]      |
[INFO] [stderr] 1209 |     assert_eq!(last_event("nul"),  Error(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]      |                                                      ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1210:36
[INFO] [stderr]      |
[INFO] [stderr] 1210 |     assert_eq!(last_event("t"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                    ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1210:42
[INFO] [stderr]      |
[INFO] [stderr] 1210 |     assert_eq!(last_event("t"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                          ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1210:54
[INFO] [stderr]      |
[INFO] [stderr] 1210 |     assert_eq!(last_event("t"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                                      ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1211:36
[INFO] [stderr]      |
[INFO] [stderr] 1211 |     assert_eq!(last_event("truz"), Error(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]      |                                    ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1211:42
[INFO] [stderr]      |
[INFO] [stderr] 1211 |     assert_eq!(last_event("truz"), Error(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]      |                                          ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1211:54
[INFO] [stderr]      |
[INFO] [stderr] 1211 |     assert_eq!(last_event("truz"), Error(SyntaxError(InvalidSyntax, 1, 4)));
[INFO] [stderr]      |                                                      ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1212:36
[INFO] [stderr]      |
[INFO] [stderr] 1212 |     assert_eq!(last_event("f"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                    ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1212:42
[INFO] [stderr]      |
[INFO] [stderr] 1212 |     assert_eq!(last_event("f"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                          ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1212:54
[INFO] [stderr]      |
[INFO] [stderr] 1212 |     assert_eq!(last_event("f"),    Error(SyntaxError(InvalidSyntax, 1, 2)));
[INFO] [stderr]      |                                                      ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1213:36
[INFO] [stderr]      |
[INFO] [stderr] 1213 |     assert_eq!(last_event("faz"),  Error(SyntaxError(InvalidSyntax, 1, 3)));
[INFO] [stderr]      |                                    ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1213:42
[INFO] [stderr]      |
[INFO] [stderr] 1213 |     assert_eq!(last_event("faz"),  Error(SyntaxError(InvalidSyntax, 1, 3)));
[INFO] [stderr]      |                                          ^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1213:54
[INFO] [stderr]      |
[INFO] [stderr] 1213 |     assert_eq!(last_event("faz"),  Error(SyntaxError(InvalidSyntax, 1, 3)));
[INFO] [stderr]      |                                                      ^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1221:18
[INFO] [stderr]      |
[INFO] [stderr] 1221 |     let array2 = Array(vec![U64(1), U64(2)]);
[INFO] [stderr]      |                  ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1221:29
[INFO] [stderr]      |
[INFO] [stderr] 1221 |     let array2 = Array(vec![U64(1), U64(2)]);
[INFO] [stderr]      |                             ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1221:37
[INFO] [stderr]      |
[INFO] [stderr] 1221 |     let array2 = Array(vec![U64(1), U64(2)]);
[INFO] [stderr]      |                                     ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1222:18
[INFO] [stderr]      |
[INFO] [stderr] 1222 |     let array3 = Array(vec![U64(1), U64(2), U64(3)]);
[INFO] [stderr]      |                  ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1222:29
[INFO] [stderr]      |
[INFO] [stderr] 1222 |     let array3 = Array(vec![U64(1), U64(2), U64(3)]);
[INFO] [stderr]      |                             ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1222:37
[INFO] [stderr]      |
[INFO] [stderr] 1222 |     let array3 = Array(vec![U64(1), U64(2), U64(3)]);
[INFO] [stderr]      |                                     ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1222:45
[INFO] [stderr]      |
[INFO] [stderr] 1222 |     let array3 = Array(vec![U64(1), U64(2), U64(3)]);
[INFO] [stderr]      |                                             ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1225:42
[INFO] [stderr]      |
[INFO] [stderr] 1225 |         tree_map.insert("a".to_string(), U64(1));
[INFO] [stderr]      |                                          ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1226:42
[INFO] [stderr]      |
[INFO] [stderr] 1226 |         tree_map.insert("b".to_string(), U64(2));
[INFO] [stderr]      |                                          ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1227:9
[INFO] [stderr]      |
[INFO] [stderr] 1227 |         Object(tree_map)
[INFO] [stderr]      |         ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1232:35
[INFO] [stderr]      |
[INFO] [stderr] 1232 |     assert_eq!(3_isize.to_json(), I64(3));
[INFO] [stderr]      |                                   ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1233:32
[INFO] [stderr]      |
[INFO] [stderr] 1233 |     assert_eq!(4_i8.to_json(), I64(4));
[INFO] [stderr]      |                                ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1234:33
[INFO] [stderr]      |
[INFO] [stderr] 1234 |     assert_eq!(5_i16.to_json(), I64(5));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1235:33
[INFO] [stderr]      |
[INFO] [stderr] 1235 |     assert_eq!(6_i32.to_json(), I64(6));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1236:33
[INFO] [stderr]      |
[INFO] [stderr] 1236 |     assert_eq!(7_i64.to_json(), I64(7));
[INFO] [stderr]      |                                 ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1237:35
[INFO] [stderr]      |
[INFO] [stderr] 1237 |     assert_eq!(8_usize.to_json(), U64(8));
[INFO] [stderr]      |                                   ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1238:32
[INFO] [stderr]      |
[INFO] [stderr] 1238 |     assert_eq!(9_u8.to_json(), U64(9));
[INFO] [stderr]      |                                ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1239:34
[INFO] [stderr]      |
[INFO] [stderr] 1239 |     assert_eq!(10_u16.to_json(), U64(10));
[INFO] [stderr]      |                                  ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1240:34
[INFO] [stderr]      |
[INFO] [stderr] 1240 |     assert_eq!(11_u32.to_json(), U64(11));
[INFO] [stderr]      |                                  ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1241:34
[INFO] [stderr]      |
[INFO] [stderr] 1241 |     assert_eq!(12_u64.to_json(), U64(12));
[INFO] [stderr]      |                                  ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1242:36
[INFO] [stderr]      |
[INFO] [stderr] 1242 |     assert_eq!(13.0_f32.to_json(), F64(13.0_f64));
[INFO] [stderr]      |                                    ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1243:36
[INFO] [stderr]      |
[INFO] [stderr] 1243 |     assert_eq!(14.0_f64.to_json(), F64(14.0_f64));
[INFO] [stderr]      |                                    ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1244:30
[INFO] [stderr]      |
[INFO] [stderr] 1244 |     assert_eq!(().to_json(), Null);
[INFO] [stderr]      |                              ^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1245:41
[INFO] [stderr]      |
[INFO] [stderr] 1245 |     assert_eq!(f32::INFINITY.to_json(), Null);
[INFO] [stderr]      |                                         ^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1246:36
[INFO] [stderr]      |
[INFO] [stderr] 1246 |     assert_eq!(f64::NAN.to_json(), Null);
[INFO] [stderr]      |                                    ^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1247:32
[INFO] [stderr]      |
[INFO] [stderr] 1247 |     assert_eq!(true.to_json(), Boolean(true));
[INFO] [stderr]      |                                ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1248:33
[INFO] [stderr]      |
[INFO] [stderr] 1248 |     assert_eq!(false.to_json(), Boolean(false));
[INFO] [stderr]      |                                 ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1249:33
[INFO] [stderr]      |
[INFO] [stderr] 1249 |     assert_eq!("abc".to_json(), String("abc".to_string()));
[INFO] [stderr]      |                                 ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1250:45
[INFO] [stderr]      |
[INFO] [stderr] 1250 |     assert_eq!("abc".to_string().to_json(), String("abc".to_string()));
[INFO] [stderr]      |                                             ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1265:36
[INFO] [stderr]      |
[INFO] [stderr] 1265 |     assert_eq!(Some(15).to_json(), I64(15));
[INFO] [stderr]      |                                    ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1266:45
[INFO] [stderr]      |
[INFO] [stderr] 1266 |     assert_eq!(Some(15 as usize).to_json(), U64(15));
[INFO] [stderr]      |                                             ^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1267:41
[INFO] [stderr]      |
[INFO] [stderr] 1267 |     assert_eq!(None::<isize>.to_json(), Null);
[INFO] [stderr]      |                                         ^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1219:9
[INFO] [stderr]      |
[INFO] [stderr] 1219 |     use json::ToJson;
[INFO] [stderr]      |         ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1278:23
[INFO] [stderr]      |
[INFO] [stderr] 1278 |     let mut encoder = Encoder::new(&mut mem_buf);
[INFO] [stderr]      |                       ^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1281:9
[INFO] [stderr]      |
[INFO] [stderr] 1281 |         EncoderError::BadHashmapKey => (),
[INFO] [stderr]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1273:35
[INFO] [stderr]      |
[INFO] [stderr] 1273 |     #[derive(PartialEq, Eq, Hash, RustcEncodable)]
[INFO] [stderr]      |                                   ^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     opt: Option<usize>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:51:10
[INFO] [stderr]    |
[INFO] [stderr] 51 |     Frog(string::String, isize)
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:51:26
[INFO] [stderr]    |
[INFO] [stderr] 51 |     Frog(string::String, isize)
[INFO] [stderr]    |                          ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:51:10
[INFO] [stderr]    |
[INFO] [stderr] 51 |     Frog(string::String, isize)
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:51:26
[INFO] [stderr]    |
[INFO] [stderr] 51 |     Frog(string::String, isize)
[INFO] [stderr]    |                          ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     a: (),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     b: usize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     c: Vec<string::String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     a: (),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     b: usize,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     c: Vec<string::String>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     inner: Vec<Inner>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 63 |     inner: Vec<Inner>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:87:21
[INFO] [stderr]    |
[INFO] [stderr] 87 |     assert_eq!(Null.pretty().to_string(), "null");
[INFO] [stderr]    |                     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:93:23
[INFO] [stderr]    |
[INFO] [stderr] 93 |     assert_eq!(U64(0).pretty().to_string(), "0");
[INFO] [stderr]    |                       ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:96:26
[INFO] [stderr]    |
[INFO] [stderr] 96 |     assert_eq!(U64(1234).pretty().to_string(), "1234");
[INFO] [stderr]    |                          ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> tests/json.rs:99:27
[INFO] [stderr]    |
[INFO] [stderr] 99 |     assert_eq!(I64(-5678).pretty().to_string(), "-5678");
[INFO] [stderr]    |                           ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]    = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:102:41
[INFO] [stderr]     |
[INFO] [stderr] 102 |     assert_eq!(U64(7650007200025252000).pretty().to_string(), "7650007200025252000");
[INFO] [stderr]     |                                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:108:25
[INFO] [stderr]     |
[INFO] [stderr] 108 |     assert_eq!(F64(3.0).pretty().to_string(), "3.0");
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:111:25
[INFO] [stderr]     |
[INFO] [stderr] 111 |     assert_eq!(F64(3.1).pretty().to_string(), "3.1");
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:114:26
[INFO] [stderr]     |
[INFO] [stderr] 114 |     assert_eq!(F64(-1.5).pretty().to_string(), "-1.5");
[INFO] [stderr]     |                          ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:117:25
[INFO] [stderr]     |
[INFO] [stderr] 117 |     assert_eq!(F64(0.5).pretty().to_string(), "0.5");
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:120:30
[INFO] [stderr]     |
[INFO] [stderr] 120 |     assert_eq!(F64(f64::NAN).pretty().to_string(), "null");
[INFO] [stderr]     |                              ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:123:35
[INFO] [stderr]     |
[INFO] [stderr] 123 |     assert_eq!(F64(f64::INFINITY).pretty().to_string(), "null");
[INFO] [stderr]     |                                   ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:126:39
[INFO] [stderr]     |
[INFO] [stderr] 126 |     assert_eq!(F64(f64::NEG_INFINITY).pretty().to_string(), "null");
[INFO] [stderr]     |                                       ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:132:39
[INFO] [stderr]     |
[INFO] [stderr] 132 |     assert_eq!(String("".to_string()).pretty().to_string(), "\"\"");
[INFO] [stderr]     |                                       ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:135:45
[INFO] [stderr]     |
[INFO] [stderr] 135 |     assert_eq!(String("madoka".to_string()).pretty().to_string(), "\"madoka\"");
[INFO] [stderr]     |                                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:141:30
[INFO] [stderr]     |
[INFO] [stderr] 141 |     assert_eq!(Boolean(true).pretty().to_string(), "true");
[INFO] [stderr]     |                              ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:144:31
[INFO] [stderr]     |
[INFO] [stderr] 144 |     assert_eq!(Boolean(false).pretty().to_string(), "false");
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:150:30
[INFO] [stderr]     |
[INFO] [stderr] 150 |     assert_eq!(Array(vec![]).pretty().to_string(), "[]");
[INFO] [stderr]     |                              ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:154:36
[INFO] [stderr]     |
[INFO] [stderr] 154 |         Array(vec![Boolean(true)]).pretty().to_string(),
[INFO] [stderr]     |                                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:169:25
[INFO] [stderr]     |
[INFO] [stderr] 169 |         long_test_array.pretty().to_string(),
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:185:31
[INFO] [stderr]     |
[INFO] [stderr] 185 |     assert_eq!(mk_object(&[]).pretty().to_string(), "{}");
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:194:56
[INFO] [stderr]     |
[INFO] [stderr] 194 |         mk_object(&[("a".to_string(), Boolean(true))]).pretty().to_string(),
[INFO] [stderr]     |                                                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:218:21
[INFO] [stderr]     |
[INFO] [stderr] 218 |         complex_obj.pretty().to_string(),
[INFO] [stderr]     |                     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:243:29
[INFO] [stderr]     |
[INFO] [stderr] 243 |     assert_eq!(a.clone(), a.pretty().to_string().parse().unwrap());
[INFO] [stderr]     |                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:583:5
[INFO] [stderr]     |
[INFO] [stderr] 583 |     f: f64,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:584:5
[INFO] [stderr]     |
[INFO] [stderr] 584 |     a: Vec<f64>
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:633:5
[INFO] [stderr]     |
[INFO] [stderr] 633 |     x: f64,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:634:5
[INFO] [stderr]     |
[INFO] [stderr] 634 |     y: bool,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:635:5
[INFO] [stderr]     |
[INFO] [stderr] 635 |     z: string::String,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:636:5
[INFO] [stderr]     |
[INFO] [stderr] 636 |     w: Vec<DecodeStruct>
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:640:7
[INFO] [stderr]     |
[INFO] [stderr] 640 |     A(f64),
[INFO] [stderr]     |       ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:641:7
[INFO] [stderr]     |
[INFO] [stderr] 641 |     B(string::String)
[INFO] [stderr]     |       ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:689:32
[INFO] [stderr]     |
[INFO] [stderr] 689 |     let found_str = json_value.find("dog");
[INFO] [stderr]     |                                ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:690:32
[INFO] [stderr]     |
[INFO] [stderr] 690 |     assert!(found_str.unwrap().as_string().unwrap() == "cat");
[INFO] [stderr]     |                                ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:696:32
[INFO] [stderr]     |
[INFO] [stderr] 696 |     let found_str = json_value.find_path(&["dog", "cat", "mouse"]);
[INFO] [stderr]     |                                ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:697:32
[INFO] [stderr]     |
[INFO] [stderr] 697 |     assert!(found_str.unwrap().as_string().unwrap() == "cheese");
[INFO] [stderr]     |                                ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:703:32
[INFO] [stderr]     |
[INFO] [stderr] 703 |     let found_str = json_value.search("mouse").and_then(|j| j.as_string());
[INFO] [stderr]     |                                ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:703:63
[INFO] [stderr]     |
[INFO] [stderr] 703 |     let found_str = json_value.search("mouse").and_then(|j| j.as_string());
[INFO] [stderr]     |                                                               ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:711:25
[INFO] [stderr]     |
[INFO] [stderr] 711 |     assert_eq!(array[0].as_string().unwrap(), "dog");
[INFO] [stderr]     |                         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:712:25
[INFO] [stderr]     |
[INFO] [stderr] 712 |     assert_eq!(array[1].as_string().unwrap(), "cat");
[INFO] [stderr]     |                         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:713:25
[INFO] [stderr]     |
[INFO] [stderr] 713 |     assert_eq!(array[2].as_string().unwrap(), "mouse");
[INFO] [stderr]     |                         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:719:24
[INFO] [stderr]     |
[INFO] [stderr] 719 |     assert!(json_value.is_object());
[INFO] [stderr]     |                        ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:725:34
[INFO] [stderr]     |
[INFO] [stderr] 725 |     let json_object = json_value.as_object();
[INFO] [stderr]     |                                  ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:732:24
[INFO] [stderr]     |
[INFO] [stderr] 732 |     assert!(json_value.is_array());
[INFO] [stderr]     |                        ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:738:33
[INFO] [stderr]     |
[INFO] [stderr] 738 |     let json_array = json_value.as_array();
[INFO] [stderr]     |                                 ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:746:24
[INFO] [stderr]     |
[INFO] [stderr] 746 |     assert!(json_value.is_string());
[INFO] [stderr]     |                        ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:752:31
[INFO] [stderr]     |
[INFO] [stderr] 752 |     let json_str = json_value.as_string();
[INFO] [stderr]     |                               ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:760:24
[INFO] [stderr]     |
[INFO] [stderr] 760 |     assert!(json_value.is_number());
[INFO] [stderr]     |                        ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:766:24
[INFO] [stderr]     |
[INFO] [stderr] 766 |     assert!(json_value.is_i64());
[INFO] [stderr]     |                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:769:25
[INFO] [stderr]     |
[INFO] [stderr] 769 |     assert!(!json_value.is_i64());
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:772:25
[INFO] [stderr]     |
[INFO] [stderr] 772 |     assert!(!json_value.is_i64());
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:778:24
[INFO] [stderr]     |
[INFO] [stderr] 778 |     assert!(json_value.is_u64());
[INFO] [stderr]     |                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:781:25
[INFO] [stderr]     |
[INFO] [stderr] 781 |     assert!(!json_value.is_u64());
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:784:25
[INFO] [stderr]     |
[INFO] [stderr] 784 |     assert!(!json_value.is_u64());
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:790:25
[INFO] [stderr]     |
[INFO] [stderr] 790 |     assert!(!json_value.is_f64());
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:793:25
[INFO] [stderr]     |
[INFO] [stderr] 793 |     assert!(!json_value.is_f64());
[INFO] [stderr]     |                         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:796:24
[INFO] [stderr]     |
[INFO] [stderr] 796 |     assert!(json_value.is_f64());
[INFO] [stderr]     |                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:799:24
[INFO] [stderr]     |
[INFO] [stderr] 799 |     assert!(json_value.is_f64());
[INFO] [stderr]     |                        ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:805:31
[INFO] [stderr]     |
[INFO] [stderr] 805 |     let json_num = json_value.as_i64();
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:812:31
[INFO] [stderr]     |
[INFO] [stderr] 812 |     let json_num = json_value.as_u64();
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:819:31
[INFO] [stderr]     |
[INFO] [stderr] 819 |     let json_num = json_value.as_f64();
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:826:24
[INFO] [stderr]     |
[INFO] [stderr] 826 |     assert!(json_value.is_boolean());
[INFO] [stderr]     |                        ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:832:32
[INFO] [stderr]     |
[INFO] [stderr] 832 |     let json_bool = json_value.as_boolean();
[INFO] [stderr]     |                                ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:840:24
[INFO] [stderr]     |
[INFO] [stderr] 840 |     assert!(json_value.is_null());
[INFO] [stderr]     |                        ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:846:32
[INFO] [stderr]     |
[INFO] [stderr] 846 |     let json_null = json_value.as_null();
[INFO] [stderr]     |                                ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:912:45
[INFO] [stderr]     |
[INFO] [stderr] 912 |                 json::as_pretty_json(&json).indent(i)).unwrap();
[INFO] [stderr]     |                                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:985:20
[INFO] [stderr]     |
[INFO] [stderr] 985 |         if !parser.stack().is_equal_to(expected_stack) {
[INFO] [stderr]     |                    ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]    --> tests/json.rs:985:28
[INFO] [stderr]     |
[INFO] [stderr] 985 |         if !parser.stack().is_equal_to(expected_stack) {
[INFO] [stderr]     |                            ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]     = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1230:23
[INFO] [stderr]      |
[INFO] [stderr] 1230 |     assert_eq!(array2.to_json(), array2);
[INFO] [stderr]      |                       ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1231:23
[INFO] [stderr]      |
[INFO] [stderr] 1231 |     assert_eq!(object.to_json(), object);
[INFO] [stderr]      |                       ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1232:24
[INFO] [stderr]      |
[INFO] [stderr] 1232 |     assert_eq!(3_isize.to_json(), I64(3));
[INFO] [stderr]      |                        ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1233:21
[INFO] [stderr]      |
[INFO] [stderr] 1233 |     assert_eq!(4_i8.to_json(), I64(4));
[INFO] [stderr]      |                     ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1234:22
[INFO] [stderr]      |
[INFO] [stderr] 1234 |     assert_eq!(5_i16.to_json(), I64(5));
[INFO] [stderr]      |                      ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1235:22
[INFO] [stderr]      |
[INFO] [stderr] 1235 |     assert_eq!(6_i32.to_json(), I64(6));
[INFO] [stderr]      |                      ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1236:22
[INFO] [stderr]      |
[INFO] [stderr] 1236 |     assert_eq!(7_i64.to_json(), I64(7));
[INFO] [stderr]      |                      ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1237:24
[INFO] [stderr]      |
[INFO] [stderr] 1237 |     assert_eq!(8_usize.to_json(), U64(8));
[INFO] [stderr]      |                        ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1238:21
[INFO] [stderr]      |
[INFO] [stderr] 1238 |     assert_eq!(9_u8.to_json(), U64(9));
[INFO] [stderr]      |                     ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1239:23
[INFO] [stderr]      |
[INFO] [stderr] 1239 |     assert_eq!(10_u16.to_json(), U64(10));
[INFO] [stderr]      |                       ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1240:23
[INFO] [stderr]      |
[INFO] [stderr] 1240 |     assert_eq!(11_u32.to_json(), U64(11));
[INFO] [stderr]      |                       ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1241:23
[INFO] [stderr]      |
[INFO] [stderr] 1241 |     assert_eq!(12_u64.to_json(), U64(12));
[INFO] [stderr]      |                       ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1242:25
[INFO] [stderr]      |
[INFO] [stderr] 1242 |     assert_eq!(13.0_f32.to_json(), F64(13.0_f64));
[INFO] [stderr]      |                         ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1243:25
[INFO] [stderr]      |
[INFO] [stderr] 1243 |     assert_eq!(14.0_f64.to_json(), F64(14.0_f64));
[INFO] [stderr]      |                         ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1244:19
[INFO] [stderr]      |
[INFO] [stderr] 1244 |     assert_eq!(().to_json(), Null);
[INFO] [stderr]      |                   ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1245:30
[INFO] [stderr]      |
[INFO] [stderr] 1245 |     assert_eq!(f32::INFINITY.to_json(), Null);
[INFO] [stderr]      |                              ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1246:25
[INFO] [stderr]      |
[INFO] [stderr] 1246 |     assert_eq!(f64::NAN.to_json(), Null);
[INFO] [stderr]      |                         ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1247:21
[INFO] [stderr]      |
[INFO] [stderr] 1247 |     assert_eq!(true.to_json(), Boolean(true));
[INFO] [stderr]      |                     ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1248:22
[INFO] [stderr]      |
[INFO] [stderr] 1248 |     assert_eq!(false.to_json(), Boolean(false));
[INFO] [stderr]      |                      ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1249:22
[INFO] [stderr]      |
[INFO] [stderr] 1249 |     assert_eq!("abc".to_json(), String("abc".to_string()));
[INFO] [stderr]      |                      ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1250:34
[INFO] [stderr]      |
[INFO] [stderr] 1250 |     assert_eq!("abc".to_string().to_json(), String("abc".to_string()));
[INFO] [stderr]      |                                  ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1251:35
[INFO] [stderr]      |
[INFO] [stderr] 1251 |     assert_eq!((1_usize, 2_usize).to_json(), array2);
[INFO] [stderr]      |                                   ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1252:44
[INFO] [stderr]      |
[INFO] [stderr] 1252 |     assert_eq!((1_usize, 2_usize, 3_usize).to_json(), array3);
[INFO] [stderr]      |                                            ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1253:35
[INFO] [stderr]      |
[INFO] [stderr] 1253 |     assert_eq!([1_usize, 2_usize].to_json(), array2);
[INFO] [stderr]      |                                   ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1254:47
[INFO] [stderr]      |
[INFO] [stderr] 1254 |     assert_eq!((&[1_usize, 2_usize, 3_usize]).to_json(), array3);
[INFO] [stderr]      |                                               ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1255:41
[INFO] [stderr]      |
[INFO] [stderr] 1255 |     assert_eq!((vec![1_usize, 2_usize]).to_json(), array2);
[INFO] [stderr]      |                                         ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1256:48
[INFO] [stderr]      |
[INFO] [stderr] 1256 |     assert_eq!(vec![1_usize, 2_usize, 3_usize].to_json(), array3);
[INFO] [stderr]      |                                                ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1260:25
[INFO] [stderr]      |
[INFO] [stderr] 1260 |     assert_eq!(tree_map.to_json(), object);
[INFO] [stderr]      |                         ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1264:25
[INFO] [stderr]      |
[INFO] [stderr] 1264 |     assert_eq!(hash_map.to_json(), object);
[INFO] [stderr]      |                         ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1265:25
[INFO] [stderr]      |
[INFO] [stderr] 1265 |     assert_eq!(Some(15).to_json(), I64(15));
[INFO] [stderr]      |                         ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1266:34
[INFO] [stderr]      |
[INFO] [stderr] 1266 |     assert_eq!(Some(15 as usize).to_json(), U64(15));
[INFO] [stderr]      |                                  ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1267:30
[INFO] [stderr]      |
[INFO] [stderr] 1267 |     assert_eq!(None::<isize>.to_json(), Null);
[INFO] [stderr]      |                              ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1279:21
[INFO] [stderr]      |
[INFO] [stderr] 1279 |     let result = hm.encode(&mut encoder);
[INFO] [stderr]      |                     ^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]     --> tests/json.rs:1274:26
[INFO] [stderr]      |
[INFO] [stderr] 1274 |     struct ArbitraryType(usize);
[INFO] [stderr]      |                          ^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr]      = help: add `#![feature(rustc_private)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 827 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `rustc-ap-serialize`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0763b86e1116bbfe8d6f8b0eefa4cc141c1d4fc606b2fceb9fb1cb9d1d6ebf56"`
[INFO] running `"docker" "rm" "-f" "0763b86e1116bbfe8d6f8b0eefa4cc141c1d4fc606b2fceb9fb1cb9d1d6ebf56"`
[INFO] [stdout] 0763b86e1116bbfe8d6f8b0eefa4cc141c1d4fc606b2fceb9fb1cb9d1d6ebf56