[INFO] updating cached repository howeih/Day-34-Aho-Corasick
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/howeih/Day-34-Aho-Corasick
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-34-Aho-Corasick" "work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-34-Aho-Corasick"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-34-Aho-Corasick'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-34-Aho-Corasick" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/howeih/Day-34-Aho-Corasick"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/howeih/Day-34-Aho-Corasick'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1d7bacf337686b5d4d0ca382a8e469fe3af11c3d
[INFO] sha for GitHub repo howeih/Day-34-Aho-Corasick: 1d7bacf337686b5d4d0ca382a8e469fe3af11c3d
[INFO] validating manifest of howeih/Day-34-Aho-Corasick 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 howeih/Day-34-Aho-Corasick 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 howeih/Day-34-Aho-Corasick
[INFO] finished frobbing howeih/Day-34-Aho-Corasick
[INFO] frobbed toml for howeih/Day-34-Aho-Corasick written to work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-34-Aho-Corasick/Cargo.toml
[INFO] started frobbing howeih/Day-34-Aho-Corasick
[INFO] finished frobbing howeih/Day-34-Aho-Corasick
[INFO] frobbed toml for howeih/Day-34-Aho-Corasick written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/howeih/Day-34-Aho-Corasick/Cargo.toml
[INFO] crate howeih/Day-34-Aho-Corasick 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 howeih/Day-34-Aho-Corasick 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-34-Aho-Corasick:/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] 905f512c6e87b082f5a73a274165155d77ff1844a8fb133726873dcffb067846
[INFO] running `"docker" "start" "-a" "905f512c6e87b082f5a73a274165155d77ff1844a8fb133726873dcffb067846"`
[INFO] [stderr]    Compiling aho_corasick v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:47:33
[INFO] [stderr]    |
[INFO] [stderr] 47 |                             let mut state = self.failure[d];
[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 0.81s
[INFO] running `"docker" "inspect" "905f512c6e87b082f5a73a274165155d77ff1844a8fb133726873dcffb067846"`
[INFO] running `"docker" "rm" "-f" "905f512c6e87b082f5a73a274165155d77ff1844a8fb133726873dcffb067846"`
[INFO] [stdout] 905f512c6e87b082f5a73a274165155d77ff1844a8fb133726873dcffb067846
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-34-Aho-Corasick:/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] b4200ec864ef7d38e1adcfba63a00bdb67ee62f3b95f41144ec7f4e63d5aa0b2
[INFO] running `"docker" "start" "-a" "b4200ec864ef7d38e1adcfba63a00bdb67ee62f3b95f41144ec7f4e63d5aa0b2"`
[INFO] [stderr]    Compiling aho_corasick v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:47:33
[INFO] [stderr]    |
[INFO] [stderr] 47 |                             let mut state = self.failure[d];
[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 0.42s
[INFO] running `"docker" "inspect" "b4200ec864ef7d38e1adcfba63a00bdb67ee62f3b95f41144ec7f4e63d5aa0b2"`
[INFO] running `"docker" "rm" "-f" "b4200ec864ef7d38e1adcfba63a00bdb67ee62f3b95f41144ec7f4e63d5aa0b2"`
[INFO] [stdout] b4200ec864ef7d38e1adcfba63a00bdb67ee62f3b95f41144ec7f4e63d5aa0b2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-34-Aho-Corasick:/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] 8cfed09f814d9c01756ae2757e6479b6f5bbded0612b9369e308821e235f152f
[INFO] running `"docker" "start" "-a" "8cfed09f814d9c01756ae2757e6479b6f5bbded0612b9369e308821e235f152f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/aho_corasick-10055cede521a8c5
[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" "8cfed09f814d9c01756ae2757e6479b6f5bbded0612b9369e308821e235f152f"`
[INFO] running `"docker" "rm" "-f" "8cfed09f814d9c01756ae2757e6479b6f5bbded0612b9369e308821e235f152f"`
[INFO] [stdout] 8cfed09f814d9c01756ae2757e6479b6f5bbded0612b9369e308821e235f152f