[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-1.38-1/sources/1.37.0/gh/r2p2/snake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/r2p2/snake'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/r2p2/snake" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/r2p2/snake"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of r2p2/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 r2p2/snake
[INFO] finished frobbing r2p2/snake
[INFO] frobbed toml for r2p2/snake written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing r2p2/snake against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 238bc6a4a5f511b5cdb869f77c2d9ef8ccf766125ae0150ff8df25adec12f63d
[INFO] running `"docker" "start" "-a" "238bc6a4a5f511b5cdb869f77c2d9ef8ccf766125ae0150ff8df25adec12f63d"`
[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 4.68s
[INFO] running `"docker" "inspect" "238bc6a4a5f511b5cdb869f77c2d9ef8ccf766125ae0150ff8df25adec12f63d"`
[INFO] running `"docker" "rm" "-f" "238bc6a4a5f511b5cdb869f77c2d9ef8ccf766125ae0150ff8df25adec12f63d"`
[INFO] [stdout] 238bc6a4a5f511b5cdb869f77c2d9ef8ccf766125ae0150ff8df25adec12f63d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] f1cce1ef3f3de50fd536062c8ea3600f1c915a99e284e6f1a88e3d3bcc8cfb70
[INFO] running `"docker" "start" "-a" "f1cce1ef3f3de50fd536062c8ea3600f1c915a99e284e6f1a88e3d3bcc8cfb70"`
[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 1.51s
[INFO] running `"docker" "inspect" "f1cce1ef3f3de50fd536062c8ea3600f1c915a99e284e6f1a88e3d3bcc8cfb70"`
[INFO] running `"docker" "rm" "-f" "f1cce1ef3f3de50fd536062c8ea3600f1c915a99e284e6f1a88e3d3bcc8cfb70"`
[INFO] [stdout] f1cce1ef3f3de50fd536062c8ea3600f1c915a99e284e6f1a88e3d3bcc8cfb70
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] fe24d30823dd22f597ba214636bb0f7caefd428a5d9f3b98d713a41c8447075c
[INFO] running `"docker" "start" "-a" "fe24d30823dd22f597ba214636bb0f7caefd428a5d9f3b98d713a41c8447075c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snake-07d15031baa4a45c
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test snake::snake::tests::move_right ... ok
[INFO] [stdout] test snake::snake::tests::move_up ... ok
[INFO] [stdout] test snake::snake::tests::move_left ... ok
[INFO] [stdout] test snake::snake::tests::move_down ... ok
[INFO] [stdout] test snake::snake::tests::initialize_snake ... ok
[INFO] [stdout] test snake::snake::tests::growing_right ... ok
[INFO] [stdout] test snake::snake::tests::growing_left ... 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" "fe24d30823dd22f597ba214636bb0f7caefd428a5d9f3b98d713a41c8447075c"`
[INFO] running `"docker" "rm" "-f" "fe24d30823dd22f597ba214636bb0f7caefd428a5d9f3b98d713a41c8447075c"`
[INFO] [stdout] fe24d30823dd22f597ba214636bb0f7caefd428a5d9f3b98d713a41c8447075c