[INFO] updating cached repository vintersnow/edit_distance.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vintersnow/edit_distance.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vintersnow/edit_distance.rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/vintersnow/edit_distance.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/vintersnow/edit_distance.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vintersnow/edit_distance.rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vintersnow/edit_distance.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vintersnow/edit_distance.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4a2914343119708430980c38346a214fdfe9d155
[INFO] sha for GitHub repo vintersnow/edit_distance.rs: 4a2914343119708430980c38346a214fdfe9d155
[INFO] validating manifest of vintersnow/edit_distance.rs 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 vintersnow/edit_distance.rs 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 vintersnow/edit_distance.rs
[INFO] finished frobbing vintersnow/edit_distance.rs
[INFO] frobbed toml for vintersnow/edit_distance.rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/vintersnow/edit_distance.rs/Cargo.toml
[INFO] started frobbing vintersnow/edit_distance.rs
[INFO] finished frobbing vintersnow/edit_distance.rs
[INFO] frobbed toml for vintersnow/edit_distance.rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vintersnow/edit_distance.rs/Cargo.toml
[INFO] crate vintersnow/edit_distance.rs already has a lockfile, it will not be regenerated
[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 vintersnow/edit_distance.rs 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-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vintersnow/edit_distance.rs:/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] 2668cfeff3fa77849661526c6eba409b92a970ab2022349dd7b988ca72195345
[INFO] running `"docker" "start" "-a" "2668cfeff3fa77849661526c6eba409b92a970ab2022349dd7b988ca72195345"`
[INFO] [stderr]    Compiling edit_distance v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |             let mut v: Vec<u32> = vec![0; s2.len()];
[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 2.17s
[INFO] running `"docker" "inspect" "2668cfeff3fa77849661526c6eba409b92a970ab2022349dd7b988ca72195345"`
[INFO] running `"docker" "rm" "-f" "2668cfeff3fa77849661526c6eba409b92a970ab2022349dd7b988ca72195345"`
[INFO] [stdout] 2668cfeff3fa77849661526c6eba409b92a970ab2022349dd7b988ca72195345
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vintersnow/edit_distance.rs:/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] f0e83327eaa15b01761d1523f86374567b8825298e25ff21fefab853b548b104
[INFO] running `"docker" "start" "-a" "f0e83327eaa15b01761d1523f86374567b8825298e25ff21fefab853b548b104"`
[INFO] [stderr]    Compiling edit_distance v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |             let mut v: Vec<u32> = vec![0; s2.len()];
[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 0.74s
[INFO] running `"docker" "inspect" "f0e83327eaa15b01761d1523f86374567b8825298e25ff21fefab853b548b104"`
[INFO] running `"docker" "rm" "-f" "f0e83327eaa15b01761d1523f86374567b8825298e25ff21fefab853b548b104"`
[INFO] [stdout] f0e83327eaa15b01761d1523f86374567b8825298e25ff21fefab853b548b104
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/vintersnow/edit_distance.rs:/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] 4a1f244dd254b3278b627d6ab5aefe5172100812deeb714e8f90fb00bd0f4c35
[INFO] running `"docker" "start" "-a" "4a1f244dd254b3278b627d6ab5aefe5172100812deeb714e8f90fb00bd0f4c35"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/edit_distance-66c2a844334dcdc9
[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" "4a1f244dd254b3278b627d6ab5aefe5172100812deeb714e8f90fb00bd0f4c35"`
[INFO] running `"docker" "rm" "-f" "4a1f244dd254b3278b627d6ab5aefe5172100812deeb714e8f90fb00bd0f4c35"`
[INFO] [stdout] 4a1f244dd254b3278b627d6ab5aefe5172100812deeb714e8f90fb00bd0f4c35