[INFO] updating cached repository jeffsmith82/strings_lists
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jeffsmith82/strings_lists
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jeffsmith82/strings_lists" "work/ex/beta-1.38-1/sources/1.37.0/gh/jeffsmith82/strings_lists"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jeffsmith82/strings_lists'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jeffsmith82/strings_lists" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jeffsmith82/strings_lists"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jeffsmith82/strings_lists'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 938199e92d4e5336e3510e10d793f1f23fa1a19a
[INFO] sha for GitHub repo jeffsmith82/strings_lists: 938199e92d4e5336e3510e10d793f1f23fa1a19a
[INFO] validating manifest of jeffsmith82/strings_lists 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 jeffsmith82/strings_lists 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 jeffsmith82/strings_lists
[INFO] finished frobbing jeffsmith82/strings_lists
[INFO] frobbed toml for jeffsmith82/strings_lists written to work/ex/beta-1.38-1/sources/1.37.0/gh/jeffsmith82/strings_lists/Cargo.toml
[INFO] started frobbing jeffsmith82/strings_lists
[INFO] finished frobbing jeffsmith82/strings_lists
[INFO] frobbed toml for jeffsmith82/strings_lists written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jeffsmith82/strings_lists/Cargo.toml
[INFO] crate jeffsmith82/strings_lists already has a lockfile, it will not be regenerated
[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 jeffsmith82/strings_lists 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jeffsmith82/strings_lists:/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] bef441f8c14a4e9dd490e629b42bd2d91f0de694e1d03ae0e92b60de12153c42
[INFO] running `"docker" "start" "-a" "bef441f8c14a4e9dd490e629b42bd2d91f0de694e1d03ae0e92b60de12153c42"`
[INFO] [stderr]    Compiling strings_lists v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut numbers2 = vec![2, 0, 16, -14, 13, 2];
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "bef441f8c14a4e9dd490e629b42bd2d91f0de694e1d03ae0e92b60de12153c42"`
[INFO] running `"docker" "rm" "-f" "bef441f8c14a4e9dd490e629b42bd2d91f0de694e1d03ae0e92b60de12153c42"`
[INFO] [stdout] bef441f8c14a4e9dd490e629b42bd2d91f0de694e1d03ae0e92b60de12153c42
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jeffsmith82/strings_lists:/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] 734a6369472ed1e3587e5e43638c7a8fc8218bab31705e4197dadc30d2e72e82
[INFO] running `"docker" "start" "-a" "734a6369472ed1e3587e5e43638c7a8fc8218bab31705e4197dadc30d2e72e82"`
[INFO] [stderr]    Compiling strings_lists v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut numbers2 = vec![2, 0, 16, -14, 13, 2];
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "734a6369472ed1e3587e5e43638c7a8fc8218bab31705e4197dadc30d2e72e82"`
[INFO] running `"docker" "rm" "-f" "734a6369472ed1e3587e5e43638c7a8fc8218bab31705e4197dadc30d2e72e82"`
[INFO] [stdout] 734a6369472ed1e3587e5e43638c7a8fc8218bab31705e4197dadc30d2e72e82
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jeffsmith82/strings_lists:/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] 05a2a8e11fce05c5fa9e0eca029c559311ce661b59de18a1a3c52a3c7972d07d
[INFO] running `"docker" "start" "-a" "05a2a8e11fce05c5fa9e0eca029c559311ce661b59de18a1a3c52a3c7972d07d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/strings_lists-40d8aee5a8874417
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::test_smallest_element ... ok
[INFO] [stdout] test tests::test_largest_element ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "05a2a8e11fce05c5fa9e0eca029c559311ce661b59de18a1a3c52a3c7972d07d"`
[INFO] running `"docker" "rm" "-f" "05a2a8e11fce05c5fa9e0eca029c559311ce661b59de18a1a3c52a3c7972d07d"`
[INFO] [stdout] 05a2a8e11fce05c5fa9e0eca029c559311ce661b59de18a1a3c52a3c7972d07d