[INFO] updating cached repository vernonrj/similarity
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vernonrj/similarity
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vernonrj/similarity" "work/ex/beta-1.38-1/sources/1.37.0/gh/vernonrj/similarity"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/vernonrj/similarity'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vernonrj/similarity" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vernonrj/similarity"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vernonrj/similarity'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6cd3770a9ad121ae15e02800c0337e7a1b028e48
[INFO] sha for GitHub repo vernonrj/similarity: 6cd3770a9ad121ae15e02800c0337e7a1b028e48
[INFO] validating manifest of vernonrj/similarity 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 vernonrj/similarity 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 vernonrj/similarity
[INFO] finished frobbing vernonrj/similarity
[INFO] frobbed toml for vernonrj/similarity written to work/ex/beta-1.38-1/sources/1.37.0/gh/vernonrj/similarity/Cargo.toml
[INFO] started frobbing vernonrj/similarity
[INFO] finished frobbing vernonrj/similarity
[INFO] frobbed toml for vernonrj/similarity written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vernonrj/similarity/Cargo.toml
[INFO] crate vernonrj/similarity 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 vernonrj/similarity 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vernonrj/similarity:/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] 6e9a383e0bf001b562e9b1c082040c9fce4bf005989f3ebc956edd7b7a35c560
[INFO] running `"docker" "start" "-a" "6e9a383e0bf001b562e9b1c082040c9fce4bf005989f3ebc956edd7b7a35c560"`
[INFO] [stderr]    Compiling gcc v0.3.43
[INFO] [stderr]    Compiling bitflags v0.8.0
[INFO] [stderr]    Compiling vec_map v0.7.0
[INFO] [stderr]    Compiling dbghelp-sys v0.2.0
[INFO] [stderr]    Compiling atty v0.2.2
[INFO] [stderr]    Compiling term_size v0.2.3
[INFO] [stderr]    Compiling clap v2.21.1
[INFO] [stderr]    Compiling backtrace v0.3.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling similarity v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:42:21
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 let mut found = matches.entry(line).or_insert(0.0);
[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 40.97s
[INFO] running `"docker" "inspect" "6e9a383e0bf001b562e9b1c082040c9fce4bf005989f3ebc956edd7b7a35c560"`
[INFO] running `"docker" "rm" "-f" "6e9a383e0bf001b562e9b1c082040c9fce4bf005989f3ebc956edd7b7a35c560"`
[INFO] [stdout] 6e9a383e0bf001b562e9b1c082040c9fce4bf005989f3ebc956edd7b7a35c560
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vernonrj/similarity:/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] 52049e2f850555da8f96e920acf09ac6ca79be3da7200be6282790f604f7197f
[INFO] running `"docker" "start" "-a" "52049e2f850555da8f96e920acf09ac6ca79be3da7200be6282790f604f7197f"`
[INFO] [stderr]    Compiling similarity v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:42:21
[INFO] [stderr]    |
[INFO] [stderr] 42 |                 let mut found = matches.entry(line).or_insert(0.0);
[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 1.21s
[INFO] running `"docker" "inspect" "52049e2f850555da8f96e920acf09ac6ca79be3da7200be6282790f604f7197f"`
[INFO] running `"docker" "rm" "-f" "52049e2f850555da8f96e920acf09ac6ca79be3da7200be6282790f604f7197f"`
[INFO] [stdout] 52049e2f850555da8f96e920acf09ac6ca79be3da7200be6282790f604f7197f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vernonrj/similarity:/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] 30a470b9567359ed0bc28303f7e84e286ab7b3a0e8ba151a66401d5744087680
[INFO] running `"docker" "start" "-a" "30a470b9567359ed0bc28303f7e84e286ab7b3a0e8ba151a66401d5744087680"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/similarity-0f193c3dba80e52c
[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" "30a470b9567359ed0bc28303f7e84e286ab7b3a0e8ba151a66401d5744087680"`
[INFO] running `"docker" "rm" "-f" "30a470b9567359ed0bc28303f7e84e286ab7b3a0e8ba151a66401d5744087680"`
[INFO] [stdout] 30a470b9567359ed0bc28303f7e84e286ab7b3a0e8ba151a66401d5744087680