[INFO] updating cached repository r2p2/snake
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/r2p2/snake
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/r2p2/snake" "work/ex/beta-1.37-6/sources/1.36.0/gh/r2p2/snake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/r2p2/snake'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/r2p2/snake" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/r2p2/snake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/r2p2/snake'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e2ed895fe515402c4ebef9c34784fa9d5e95b938
[INFO] sha for GitHub repo r2p2/snake: e2ed895fe515402c4ebef9c34784fa9d5e95b938
[INFO] validating manifest of r2p2/snake 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 r2p2/snake 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 r2p2/snake
[INFO] finished frobbing r2p2/snake
[INFO] frobbed toml for r2p2/snake written to work/ex/beta-1.37-6/sources/1.36.0/gh/r2p2/snake/Cargo.toml
[INFO] started frobbing r2p2/snake
[INFO] finished frobbing r2p2/snake
[INFO] frobbed toml for r2p2/snake written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/r2p2/snake/Cargo.toml
[INFO] crate r2p2/snake 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 r2p2/snake against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/r2p2/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 8438dac2f5ce8edd9c5e54c32fa0e879555d6e5d904a70fc7cae7c950a61d349
[INFO] running `"docker" "start" "-a" "8438dac2f5ce8edd9c5e54c32fa0e879555d6e5d904a70fc7cae7c950a61d349"`
[INFO] [stderr]    Compiling libc v0.2.31
[INFO] [stderr]    Compiling rand v0.3.16
[INFO] [stderr]    Compiling tempfile v2.2.0
[INFO] [stderr]    Compiling gag v0.1.9
[INFO] [stderr]    Compiling rustty v0.1.12
[INFO] [stderr]    Compiling snake v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/snake_tui/ui.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |             let mut cell = canvas.get_mut(x as usize, y as usize).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 7.65s
[INFO] running `"docker" "inspect" "8438dac2f5ce8edd9c5e54c32fa0e879555d6e5d904a70fc7cae7c950a61d349"`
[INFO] running `"docker" "rm" "-f" "8438dac2f5ce8edd9c5e54c32fa0e879555d6e5d904a70fc7cae7c950a61d349"`
[INFO] [stdout] 8438dac2f5ce8edd9c5e54c32fa0e879555d6e5d904a70fc7cae7c950a61d349
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/r2p2/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 74ef7970dc94b84c8a0ea60412d529aae7a1bea27934878733dc8155677d8303
[INFO] running `"docker" "start" "-a" "74ef7970dc94b84c8a0ea60412d529aae7a1bea27934878733dc8155677d8303"`
[INFO] [stderr]    Compiling snake v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/snake_tui/ui.rs:78:17
[INFO] [stderr]    |
[INFO] [stderr] 78 |             let mut cell = canvas.get_mut(x as usize, y as usize).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 1.20s
[INFO] running `"docker" "inspect" "74ef7970dc94b84c8a0ea60412d529aae7a1bea27934878733dc8155677d8303"`
[INFO] running `"docker" "rm" "-f" "74ef7970dc94b84c8a0ea60412d529aae7a1bea27934878733dc8155677d8303"`
[INFO] [stdout] 74ef7970dc94b84c8a0ea60412d529aae7a1bea27934878733dc8155677d8303
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/r2p2/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] b63eafe0e68a925e08733630ac757fff979603625401aacd4d2512941c5bbdc9
[INFO] running `"docker" "start" "-a" "b63eafe0e68a925e08733630ac757fff979603625401aacd4d2512941c5bbdc9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snake-993eebe5d1782a66
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test snake::snake::tests::initialize_snake ... ok
[INFO] [stdout] test snake::snake::tests::growing_right ... ok
[INFO] [stdout] test snake::snake::tests::move_down ... ok
[INFO] [stdout] test snake::snake::tests::move_right ... ok
[INFO] [stdout] test snake::snake::tests::growing_left ... ok
[INFO] [stdout] test snake::snake::tests::move_left ... ok
[INFO] [stdout] test snake::snake::tests::move_up ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b63eafe0e68a925e08733630ac757fff979603625401aacd4d2512941c5bbdc9"`
[INFO] running `"docker" "rm" "-f" "b63eafe0e68a925e08733630ac757fff979603625401aacd4d2512941c5bbdc9"`
[INFO] [stdout] b63eafe0e68a925e08733630ac757fff979603625401aacd4d2512941c5bbdc9