[INFO] crate yansi 0.5.0 is already in cache
[INFO] extracting crate yansi 0.5.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/yansi/0.5.0
[INFO] extracting crate yansi 0.5.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/yansi/0.5.0
[INFO] validating manifest of yansi-0.5.0 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yansi-0.5.0 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing yansi-0.5.0
[INFO] finished frobbing yansi-0.5.0
[INFO] frobbed toml for yansi-0.5.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/yansi/0.5.0/Cargo.toml
[INFO] started frobbing yansi-0.5.0
[INFO] finished frobbing yansi-0.5.0
[INFO] frobbed toml for yansi-0.5.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/yansi/0.5.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing yansi-0.5.0 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/yansi/0.5.0:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 67dab376436fee0ab6c3adf6c425c2bc0a9a3c8e15ab7a848fee862fe61f4e66
[INFO] running `"docker" "start" "-a" "67dab376436fee0ab6c3adf6c425c2bc0a9a3c8e15ab7a848fee862fe61f4e66"`
[INFO] [stderr]    Compiling yansi v0.5.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `"docker" "inspect" "67dab376436fee0ab6c3adf6c425c2bc0a9a3c8e15ab7a848fee862fe61f4e66"`
[INFO] running `"docker" "rm" "-f" "67dab376436fee0ab6c3adf6c425c2bc0a9a3c8e15ab7a848fee862fe61f4e66"`
[INFO] [stdout] 67dab376436fee0ab6c3adf6c425c2bc0a9a3c8e15ab7a848fee862fe61f4e66
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/yansi/0.5.0:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 6feacdcc9be44d13846dbf4355312b7275a63a3c13bf69ff0bc5653e38698c47
[INFO] running `"docker" "start" "-a" "6feacdcc9be44d13846dbf4355312b7275a63a3c13bf69ff0bc5653e38698c47"`
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/parking_lot_core-0.2.14/src/lib.rs:41:60
[INFO] [stderr]    |
[INFO] [stderr] 41 | #![cfg_attr(all(feature = "nightly", target_os = "linux"), feature(integer_atomics))]
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `parking_lot_core`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6feacdcc9be44d13846dbf4355312b7275a63a3c13bf69ff0bc5653e38698c47"`
[INFO] running `"docker" "rm" "-f" "6feacdcc9be44d13846dbf4355312b7275a63a3c13bf69ff0bc5653e38698c47"`
[INFO] [stdout] 6feacdcc9be44d13846dbf4355312b7275a63a3c13bf69ff0bc5653e38698c47