[INFO] crate algorithms 0.2.1 is already in cache
[INFO] extracting crate algorithms 0.2.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/algorithms/0.2.1
[INFO] extracting crate algorithms 0.2.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/algorithms/0.2.1
[INFO] validating manifest of algorithms-0.2.1 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 algorithms-0.2.1 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 algorithms-0.2.1
[INFO] finished frobbing algorithms-0.2.1
[INFO] frobbed toml for algorithms-0.2.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/algorithms/0.2.1/Cargo.toml
[INFO] started frobbing algorithms-0.2.1
[INFO] finished frobbing algorithms-0.2.1
[INFO] frobbed toml for algorithms-0.2.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/algorithms/0.2.1/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 algorithms-0.2.1 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/algorithms/0.2.1:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 017a128d458657d6a1cafae1551b5e4fcfd6ca70d76388cddd4d7b2c58478d85
[INFO] running `"docker" "start" "-a" "017a128d458657d6a1cafae1551b5e4fcfd6ca70d76388cddd4d7b2c58478d85"`
[INFO] [stderr]    Compiling algorithms v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/searching.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `"docker" "inspect" "017a128d458657d6a1cafae1551b5e4fcfd6ca70d76388cddd4d7b2c58478d85"`
[INFO] running `"docker" "rm" "-f" "017a128d458657d6a1cafae1551b5e4fcfd6ca70d76388cddd4d7b2c58478d85"`
[INFO] [stdout] 017a128d458657d6a1cafae1551b5e4fcfd6ca70d76388cddd4d7b2c58478d85
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/algorithms/0.2.1:/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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] cea4d75a46132bf8f5ab11e67820d42fb8e56417a53be893925694c72d5a7db8
[INFO] running `"docker" "start" "-a" "cea4d75a46132bf8f5ab11e67820d42fb8e56417a53be893925694c72d5a7db8"`
[INFO] [stderr]    Compiling algorithms v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/searching.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |         let mut ve1 = vec![6, 5, 4, 3, 2, 1];
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let mut ve2 = vec![1, 2, 3, 4, 5, 6];
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `"docker" "inspect" "cea4d75a46132bf8f5ab11e67820d42fb8e56417a53be893925694c72d5a7db8"`
[INFO] running `"docker" "rm" "-f" "cea4d75a46132bf8f5ab11e67820d42fb8e56417a53be893925694c72d5a7db8"`
[INFO] [stdout] cea4d75a46132bf8f5ab11e67820d42fb8e56417a53be893925694c72d5a7db8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/algorithms/0.2.1:/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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 2fd791bbd6189c36ee57370ffa737a2884e9464b9be946ae935d47f1da43ca88
[INFO] running `"docker" "start" "-a" "2fd791bbd6189c36ee57370ffa737a2884e9464b9be946ae935d47f1da43ca88"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/algorithms-435a1997aa177ad8
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::quick_sort ... ok
[INFO] [stdout] test tests::merge_sort ... ok
[INFO] [stdout] test sorting::selection_sort::tests::sort_numbers ... ok
[INFO] [stdout] test tests::bubble_sort ... ok
[INFO] [stderr]    Doc-tests algorithms
[INFO] [stdout] test sorting::tests::is_sorted ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "2fd791bbd6189c36ee57370ffa737a2884e9464b9be946ae935d47f1da43ca88"`
[INFO] running `"docker" "rm" "-f" "2fd791bbd6189c36ee57370ffa737a2884e9464b9be946ae935d47f1da43ca88"`
[INFO] [stdout] 2fd791bbd6189c36ee57370ffa737a2884e9464b9be946ae935d47f1da43ca88