[INFO] crate shared-mutex 0.3.1 is already in cache
[INFO] extracting crate shared-mutex 0.3.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/shared-mutex/0.3.1
[INFO] extracting crate shared-mutex 0.3.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/shared-mutex/0.3.1
[INFO] validating manifest of shared-mutex-0.3.1 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 shared-mutex-0.3.1 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 shared-mutex-0.3.1
[INFO] finished frobbing shared-mutex-0.3.1
[INFO] frobbed toml for shared-mutex-0.3.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/shared-mutex/0.3.1/Cargo.toml
[INFO] started frobbing shared-mutex-0.3.1
[INFO] finished frobbing shared-mutex-0.3.1
[INFO] frobbed toml for shared-mutex-0.3.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/shared-mutex/0.3.1/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] [stderr]     Blocking waiting for file lock on package cache
[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 shared-mutex-0.3.1 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/shared-mutex/0.3.1:/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] ba2b21adceb6d0e78997ecda4b42e1dd26400759f3ee9cf45764e54ef2e2ec37
[INFO] running `"docker" "start" "-a" "ba2b21adceb6d0e78997ecda4b42e1dd26400759f3ee9cf45764e54ef2e2ec37"`
[INFO] [stderr]    Compiling poison v0.1.0
[INFO] [stderr]    Compiling shared-mutex v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/lib.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |         unsafe { self.data.into_inner().into_inner() }
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_unsafe)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `"docker" "inspect" "ba2b21adceb6d0e78997ecda4b42e1dd26400759f3ee9cf45764e54ef2e2ec37"`
[INFO] running `"docker" "rm" "-f" "ba2b21adceb6d0e78997ecda4b42e1dd26400759f3ee9cf45764e54ef2e2ec37"`
[INFO] [stdout] ba2b21adceb6d0e78997ecda4b42e1dd26400759f3ee9cf45764e54ef2e2ec37
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/shared-mutex/0.3.1:/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] f204cfca186ff9c215495578433737ea406b908d24d109015363418e8e2d7f48
[INFO] running `"docker" "start" "-a" "f204cfca186ff9c215495578433737ea406b908d24d109015363418e8e2d7f48"`
[INFO] [stderr]    Compiling scoped-pool v0.1.10
[INFO] [stderr]    Compiling shared-mutex v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary `unsafe` block
[INFO] [stderr]   --> src/lib.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |         unsafe { self.data.into_inner().into_inner() }
[INFO] [stderr]    |         ^^^^^^ unnecessary `unsafe` block
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:1:24
[INFO] [stderr]    |
[INFO] [stderr] 1  | #![cfg_attr(test, deny(warnings))]
[INFO] [stderr]    |                        ^^^^^^^^
[INFO] [stderr]    = note: #[warn(unused_unsafe)] implied by #[warn(warnings)]
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.55s
[INFO] running `"docker" "inspect" "f204cfca186ff9c215495578433737ea406b908d24d109015363418e8e2d7f48"`
[INFO] running `"docker" "rm" "-f" "f204cfca186ff9c215495578433737ea406b908d24d109015363418e8e2d7f48"`
[INFO] [stdout] f204cfca186ff9c215495578433737ea406b908d24d109015363418e8e2d7f48
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/shared-mutex/0.3.1:/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"`
[INFO] [stdout] dcd6dd51823db897f48d374860187d5071d033cdb2b19db3fa069d210eba8876
[INFO] running `"docker" "start" "-a" "dcd6dd51823db897f48d374860187d5071d033cdb2b19db3fa069d210eba8876"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/shared_mutex-da104b501ffcc64a
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test raw::test::test_raw_is ... ok
[INFO] [stdout] test test::test_mapping ... ok
[INFO] [stdout] test test::test_simple_single_thread ... ok
[INFO] [stdout] test test::test_try_locking ... ok
[INFO] [stdout] test test::test_map_recover ... ok
[INFO] [stdout] test test::test_simple_multithreaded ... ok
[INFO] [stdout] test test::test_simple_waiting ... ok
[INFO] [stdout] test test::test_locking_multithreaded ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests shared-mutex
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "dcd6dd51823db897f48d374860187d5071d033cdb2b19db3fa069d210eba8876"`
[INFO] running `"docker" "rm" "-f" "dcd6dd51823db897f48d374860187d5071d033cdb2b19db3fa069d210eba8876"`
[INFO] [stdout] dcd6dd51823db897f48d374860187d5071d033cdb2b19db3fa069d210eba8876