[INFO] crate sfunc 0.0.4 is already in cache
[INFO] extracting crate sfunc 0.0.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/sfunc/0.0.4
[INFO] extracting crate sfunc 0.0.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sfunc/0.0.4
[INFO] validating manifest of sfunc-0.0.4 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sfunc-0.0.4 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sfunc-0.0.4
[INFO] finished frobbing sfunc-0.0.4
[INFO] frobbed toml for sfunc-0.0.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/sfunc/0.0.4/Cargo.toml
[INFO] started frobbing sfunc-0.0.4
[INFO] finished frobbing sfunc-0.0.4
[INFO] frobbed toml for sfunc-0.0.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sfunc/0.0.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing sfunc-0.0.4 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/sfunc/0.0.4:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 8c6d8c9834831441374e59ce3a4d88fcbed26ef7e1a7b5ad81d16b80711414a0
[INFO] running `"docker" "start" "-a" "8c6d8c9834831441374e59ce3a4d88fcbed26ef7e1a7b5ad81d16b80711414a0"`
[INFO] [stderr]    Compiling sfunc v0.0.4 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `unstable`
[INFO] [stderr]  --> src/lib.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![allow(unstable)]
[INFO] [stderr]   |          ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unknown_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::num::Float`
[INFO] [stderr]   --> src/beta.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     use std::num::Float;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ no `Float` in `num`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::num::Float`
[INFO] [stderr]    --> src/beta.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |     use std::num::Float;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^ no `Float` in `num`
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | extern crate libc;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |     use libc::{c_double, c_int};
[INFO] [stderr]    |                ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:22:26
[INFO] [stderr]    |
[INFO] [stderr] 22 |     use libc::{c_double, c_int};
[INFO] [stderr]    |                          ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:25:23
[INFO] [stderr]    |
[INFO] [stderr] 25 |         pub fn erf(x: c_double) -> c_double;
[INFO] [stderr]    |                       ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:25:36
[INFO] [stderr]    |
[INFO] [stderr] 25 |         pub fn erf(x: c_double) -> c_double;
[INFO] [stderr]    |                                    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:26:24
[INFO] [stderr]    |
[INFO] [stderr] 26 |         pub fn erfc(x: c_double) -> c_double;
[INFO] [stderr]    |                        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:26:37
[INFO] [stderr]    |
[INFO] [stderr] 26 |         pub fn erfc(x: c_double) -> c_double;
[INFO] [stderr]    |                                     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:27:28
[INFO] [stderr]    |
[INFO] [stderr] 27 |         pub fn lgamma_r(x: c_double, sign: &mut c_int) -> c_double;
[INFO] [stderr]    |                            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:27:49
[INFO] [stderr]    |
[INFO] [stderr] 27 |         pub fn lgamma_r(x: c_double, sign: &mut c_int) -> c_double;
[INFO] [stderr]    |                                                 ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
[INFO] [stderr]   --> src/lib.rs:27:59
[INFO] [stderr]    |
[INFO] [stderr] 27 |         pub fn lgamma_r(x: c_double, sign: &mut c_int) -> c_double;
[INFO] [stderr]    |                                                           ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/27812
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 12 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `sfunc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8c6d8c9834831441374e59ce3a4d88fcbed26ef7e1a7b5ad81d16b80711414a0"`
[INFO] running `"docker" "rm" "-f" "8c6d8c9834831441374e59ce3a4d88fcbed26ef7e1a7b5ad81d16b80711414a0"`
[INFO] [stdout] 8c6d8c9834831441374e59ce3a4d88fcbed26ef7e1a7b5ad81d16b80711414a0