[INFO] crate cons-list 0.0.3 is already in cache
[INFO] extracting crate cons-list 0.0.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/cons-list/0.0.3
[INFO] extracting crate cons-list 0.0.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cons-list/0.0.3
[INFO] validating manifest of cons-list-0.0.3 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 cons-list-0.0.3 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 cons-list-0.0.3
[INFO] finished frobbing cons-list-0.0.3
[INFO] frobbed toml for cons-list-0.0.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/cons-list/0.0.3/Cargo.toml
[INFO] started frobbing cons-list-0.0.3
[INFO] finished frobbing cons-list-0.0.3
[INFO] frobbed toml for cons-list-0.0.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/cons-list/0.0.3/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] 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cons-list-0.0.3 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cons-list/0.0.3:/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] f8599772697aa0da5327642c8e6e6ef6c1ee39b46d846162687d4bfecb0aff3a
[INFO] running `"docker" "start" "-a" "f8599772697aa0da5327642c8e6e6ef6c1ee39b46d846162687d4bfecb0aff3a"`
[INFO] [stderr]    Compiling cons-list v0.0.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `"docker" "inspect" "f8599772697aa0da5327642c8e6e6ef6c1ee39b46d846162687d4bfecb0aff3a"`
[INFO] running `"docker" "rm" "-f" "f8599772697aa0da5327642c8e6e6ef6c1ee39b46d846162687d4bfecb0aff3a"`
[INFO] [stdout] f8599772697aa0da5327642c8e6e6ef6c1ee39b46d846162687d4bfecb0aff3a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/cons-list/0.0.3:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] dbaa86262ba92b18ec1a4a3cf40718e8907a6bc870c42f085582f7ad09c17ba4
[INFO] running `"docker" "start" "-a" "dbaa86262ba92b18ec1a4a3cf40718e8907a6bc870c42f085582f7ad09c17ba4"`
[INFO] [stderr]    Compiling cons-list v0.0.3 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:13:19
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![cfg_attr(test, feature(test))]
[INFO] [stderr]    |                   ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `test::Bencher`
[INFO] [stderr]    --> src/lib.rs:427:9
[INFO] [stderr]     |
[INFO] [stderr] 427 |     use test::Bencher;
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::hash::SipHasher': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stderr]    --> src/lib.rs:359:21
[INFO] [stderr]     |
[INFO] [stderr] 359 |         let mut h = hash::SipHasher::new();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::hash::SipHasher::new': use `std::collections::hash_map::DefaultHasher` instead
[INFO] [stderr]    --> src/lib.rs:359:21
[INFO] [stderr]     |
[INFO] [stderr] 359 |         let mut h = hash::SipHasher::new();
[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 `cons-list`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "dbaa86262ba92b18ec1a4a3cf40718e8907a6bc870c42f085582f7ad09c17ba4"`
[INFO] running `"docker" "rm" "-f" "dbaa86262ba92b18ec1a4a3cf40718e8907a6bc870c42f085582f7ad09c17ba4"`
[INFO] [stdout] dbaa86262ba92b18ec1a4a3cf40718e8907a6bc870c42f085582f7ad09c17ba4