[INFO] updating cached repository onasauri/snake
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/onasauri/snake
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/onasauri/snake" "work/ex/beta-1.38-1/sources/1.37.0/gh/onasauri/snake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/onasauri/snake'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/onasauri/snake" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/onasauri/snake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/onasauri/snake'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] eedc7092f4b9830a3afe813eee0bdebafe788cf1
[INFO] sha for GitHub repo onasauri/snake: eedc7092f4b9830a3afe813eee0bdebafe788cf1
[INFO] validating manifest of onasauri/snake 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 onasauri/snake 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 onasauri/snake
[INFO] finished frobbing onasauri/snake
[INFO] frobbed toml for onasauri/snake written to work/ex/beta-1.38-1/sources/1.37.0/gh/onasauri/snake/Cargo.toml
[INFO] started frobbing onasauri/snake
[INFO] finished frobbing onasauri/snake
[INFO] frobbed toml for onasauri/snake written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/onasauri/snake/Cargo.toml
[INFO] crate onasauri/snake 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 onasauri/snake 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/onasauri/snake:/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] 4abedeea76b350993e134464ce04abb51e597c657d2047a9efd8875abaad9b8a
[INFO] running `"docker" "start" "-a" "4abedeea76b350993e134464ce04abb51e597c657d2047a9efd8875abaad9b8a"`
[INFO] [stderr]    Compiling matrixmultiply v0.1.13
[INFO] [stderr]    Compiling ndarray v0.8.0
[INFO] [stderr]    Compiling either v1.0.3
[INFO] [stderr]    Compiling lazy_static v0.2.4
[INFO] [stderr]    Compiling num-complex v0.1.36
[INFO] [stderr]    Compiling preferences v1.1.0
[INFO] [stderr]    Compiling sdl2 v0.29.0
[INFO] [stderr]    Compiling itertools v0.5.9
[INFO] [stderr]    Compiling snake v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/engine.rs:37:41
[INFO] [stderr]    |
[INFO] [stderr] 37 |                                     let mut window = self.renderer.window_mut().unwrap();
[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 12.50s
[INFO] running `"docker" "inspect" "4abedeea76b350993e134464ce04abb51e597c657d2047a9efd8875abaad9b8a"`
[INFO] running `"docker" "rm" "-f" "4abedeea76b350993e134464ce04abb51e597c657d2047a9efd8875abaad9b8a"`
[INFO] [stdout] 4abedeea76b350993e134464ce04abb51e597c657d2047a9efd8875abaad9b8a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/onasauri/snake:/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] 1b5b3d31b83db21601dd67578df512c05a3b087ccaad9101bf4946166736cab6
[INFO] running `"docker" "start" "-a" "1b5b3d31b83db21601dd67578df512c05a3b087ccaad9101bf4946166736cab6"`
[INFO] [stderr]    Compiling snake v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/engine.rs:37:41
[INFO] [stderr]    |
[INFO] [stderr] 37 |                                     let mut window = self.renderer.window_mut().unwrap();
[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 1.25s
[INFO] running `"docker" "inspect" "1b5b3d31b83db21601dd67578df512c05a3b087ccaad9101bf4946166736cab6"`
[INFO] running `"docker" "rm" "-f" "1b5b3d31b83db21601dd67578df512c05a3b087ccaad9101bf4946166736cab6"`
[INFO] [stdout] 1b5b3d31b83db21601dd67578df512c05a3b087ccaad9101bf4946166736cab6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/onasauri/snake:/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] 773a0777795057f882a92330b279435c0aa2eeffa94918281ae0611f27098602
[INFO] running `"docker" "start" "-a" "773a0777795057f882a92330b279435c0aa2eeffa94918281ae0611f27098602"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snake-e5e44cabf4893a48
[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" "773a0777795057f882a92330b279435c0aa2eeffa94918281ae0611f27098602"`
[INFO] running `"docker" "rm" "-f" "773a0777795057f882a92330b279435c0aa2eeffa94918281ae0611f27098602"`
[INFO] [stdout] 773a0777795057f882a92330b279435c0aa2eeffa94918281ae0611f27098602