[INFO] crate array-queue 0.3.3 is already in cache
[INFO] extracting crate array-queue 0.3.3 into work/ex/beta-1.38-1/sources/1.37.0/reg/array-queue/0.3.3
[INFO] extracting crate array-queue 0.3.3 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/array-queue/0.3.3
[INFO] validating manifest of array-queue-0.3.3 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 array-queue-0.3.3 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 array-queue-0.3.3
[INFO] finished frobbing array-queue-0.3.3
[INFO] frobbed toml for array-queue-0.3.3 written to work/ex/beta-1.38-1/sources/1.37.0/reg/array-queue/0.3.3/Cargo.toml
[INFO] started frobbing array-queue-0.3.3
[INFO] finished frobbing array-queue-0.3.3
[INFO] frobbed toml for array-queue-0.3.3 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/array-queue/0.3.3/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 array-queue-0.3.3 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/array-queue/0.3.3:/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] 1457146e585458c1ab56398b9f06edf6c446e1e54046dfb515f0aa4ab3726a42
[INFO] running `"docker" "start" "-a" "1457146e585458c1ab56398b9f06edf6c446e1e54046dfb515f0aa4ab3726a42"`
[INFO] [stderr]    Compiling array-queue v0.3.3 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `"docker" "inspect" "1457146e585458c1ab56398b9f06edf6c446e1e54046dfb515f0aa4ab3726a42"`
[INFO] running `"docker" "rm" "-f" "1457146e585458c1ab56398b9f06edf6c446e1e54046dfb515f0aa4ab3726a42"`
[INFO] [stdout] 1457146e585458c1ab56398b9f06edf6c446e1e54046dfb515f0aa4ab3726a42
[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/array-queue/0.3.3:/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] 031aaf77367034c616cf6b5f19b13e6ce20c4d95d205ac7112373509777a4d81
[INFO] running `"docker" "start" "-a" "031aaf77367034c616cf6b5f19b13e6ce20c4d95d205ac7112373509777a4d81"`
[INFO] [stderr]    Compiling array-queue v0.3.3 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `std::clone::Clone::clone` that must be used
[INFO] [stderr]    --> src/array_queue.rs:553:9
[INFO] [stderr]     |
[INFO] [stderr] 553 |         a.clone();
[INFO] [stderr]     |         ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: cloning is often expensive and is not expected to have side effects
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `"docker" "inspect" "031aaf77367034c616cf6b5f19b13e6ce20c4d95d205ac7112373509777a4d81"`
[INFO] running `"docker" "rm" "-f" "031aaf77367034c616cf6b5f19b13e6ce20c4d95d205ac7112373509777a4d81"`
[INFO] [stdout] 031aaf77367034c616cf6b5f19b13e6ce20c4d95d205ac7112373509777a4d81
[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/array-queue/0.3.3:/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"`
[INFO] [stdout] 3291ced985b3ebe6458dca6829501456cdb6122c575c9474d2b504dbf79eafbd
[INFO] running `"docker" "start" "-a" "3291ced985b3ebe6458dca6829501456cdb6122c575c9474d2b504dbf79eafbd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/array_queue-8b0bbcafb877a0c8
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test array_queue::test::is_empty ... ok
[INFO] [stdout] test array_queue::test::iterate_forward_and_backward ... ok
[INFO] [stdout] test array_queue::test::iterator ... ok
[INFO] [stdout] test array_queue::test::first_and_last ... ok
[INFO] [stdout] test array_queue::test::is_full ... ok
[INFO] [stdout] test array_queue::test::iterate_empty_queue ... ok
[INFO] [stdout] test array_queue::test::no_drops_of_elements_on_push_back ... ok
[INFO] [stdout] test array_queue::test::pop_front ... ok
[INFO] [stdout] test array_queue::test::new ... ok
[INFO] [stdout] test array_queue::test::iterator_mut ... ok
[INFO] [stdout] test array_queue::test::iterator_across_edges ... ok
[INFO] [stdout] test array_queue::test::clone ... ok
[INFO] [stdout] test array_queue::test::push_front ... ok
[INFO] [stdout] test array_queue::test::push_back ... ok
[INFO] [stdout] test array_queue::test::iterate_forward_and_backward_mutablly ... ok
[INFO] [stdout] test array_queue::test::reference_elements ... ok
[INFO] [stdout] test array_queue::test::drops_of_elements_on_pop_back ... ok
[INFO] [stdout] test array_queue::test::pop_back ... ok
[INFO] [stdout] test array_queue::test::push_and_pop_across_edges ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests array-queue
[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" "3291ced985b3ebe6458dca6829501456cdb6122c575c9474d2b504dbf79eafbd"`
[INFO] running `"docker" "rm" "-f" "3291ced985b3ebe6458dca6829501456cdb6122c575c9474d2b504dbf79eafbd"`
[INFO] [stdout] 3291ced985b3ebe6458dca6829501456cdb6122c575c9474d2b504dbf79eafbd