[INFO] fetching crate json-joxit-fork 0.12.1...
[INFO] checking json-joxit-fork-0.12.1 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] extracting crate json-joxit-fork 0.12.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate json-joxit-fork 0.12.1 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate json-joxit-fork 0.12.1
[INFO] finished tweaking crates.io crate json-joxit-fork 0.12.1
[INFO] tweaked toml for crates.io crate json-joxit-fork 0.12.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7808c1e94315cd124282f337a0bc1464399539d3382eb8e015ea29f6ecb009e1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7808c1e94315cd124282f337a0bc1464399539d3382eb8e015ea29f6ecb009e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7808c1e94315cd124282f337a0bc1464399539d3382eb8e015ea29f6ecb009e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7808c1e94315cd124282f337a0bc1464399539d3382eb8e015ea29f6ecb009e1", kill_on_drop: false }`
[INFO] [stdout] 7808c1e94315cd124282f337a0bc1464399539d3382eb8e015ea29f6ecb009e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f305a41734a04e5d5441dd0535d8dce9eee33730498c6db825573ab7953df6a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1f305a41734a04e5d5441dd0535d8dce9eee33730498c6db825573ab7953df6a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking json-joxit-fork v0.12.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]    --> src/codegen.rs:393:9
[INFO] [stdout]     |
[INFO] [stdout] 393 |     use std::borrow::Borrow;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::JsonValue`
[INFO] [stdout]    --> src/codegen.rs:394:9
[INFO] [stdout]     |
[INFO] [stdout] 394 |     use crate::JsonValue;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::parse`
[INFO] [stdout]    --> src/codegen.rs:395:9
[INFO] [stdout]     |
[INFO] [stdout] 395 |     use crate::parse;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/util/print_dec.rs:62:29
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let mut buf: [u8; 30] = mem::uninitialized();
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]   --> src/util/print_dec.rs:62:29
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let mut buf: [u8; 30] = mem::uninitialized();
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parser.rs:843:13
[INFO] [stdout]     |
[INFO] [stdout] 843 |         let mut expected = object! {
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parser.rs:871:13
[INFO] [stdout]     |
[INFO] [stdout] 871 |         let mut expected = object! {
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/parser.rs:772:5
[INFO] [stdout]     |
[INFO] [stdout] 772 |     #[macro_use]
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/parser.rs:772:5
[INFO] [stdout]     |
[INFO] [stdout] 772 |     #[macro_use]
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/codegen.rs:407:5
[INFO] [stdout]     |
[INFO] [stdout] 407 |     generator.write_string(&s);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/codegen.rs:418:5
[INFO] [stdout]     |
[INFO] [stdout] 418 |     generator.write_string(&s);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]  --> tests/stringify.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate json;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]  --> tests/value.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate json;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]  --> tests/customgen.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate json;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]  --> tests/number.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate json;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `json-joxit-fork`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]  --> tests/parse.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate json;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]  --> tests/print_dec.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate json;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]  --> tests/json_checker.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate json;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `json`
[INFO] [stdout]   --> benches/log.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | extern crate json;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1f305a41734a04e5d5441dd0535d8dce9eee33730498c6db825573ab7953df6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f305a41734a04e5d5441dd0535d8dce9eee33730498c6db825573ab7953df6a", kill_on_drop: false }`
[INFO] [stdout] 1f305a41734a04e5d5441dd0535d8dce9eee33730498c6db825573ab7953df6a