[INFO] cloning repository Baelyk/minesweeper
[INFO] running `"git" "clone" "--bare" "git://github.com/Baelyk/minesweeper.git" "work/cache/sources/gh/Baelyk/minesweeper"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/Baelyk/minesweeper'...
[INFO] running `"git" "clone" "work/cache/sources/gh/Baelyk/minesweeper" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/Baelyk/minesweeper"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/Baelyk/minesweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Baelyk/minesweeper" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/Baelyk/minesweeper"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/Baelyk/minesweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 93510b63b0e80f5df69cd76046a28ddc6e198fb2
[INFO] sha for GitHub repo Baelyk/minesweeper: 93510b63b0e80f5df69cd76046a28ddc6e198fb2
[INFO] validating manifest of Baelyk/minesweeper on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Baelyk/minesweeper on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Baelyk/minesweeper
[INFO] finished frobbing Baelyk/minesweeper
[INFO] frobbed toml for Baelyk/minesweeper written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/Baelyk/minesweeper/Cargo.toml
[INFO] started frobbing Baelyk/minesweeper
[INFO] finished frobbing Baelyk/minesweeper
[INFO] frobbed toml for Baelyk/minesweeper written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/Baelyk/minesweeper/Cargo.toml
[INFO] crate Baelyk/minesweeper already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Baelyk/minesweeper against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-4/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/Baelyk/minesweeper:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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=forbid" "-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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e41b50699a26e02f68751fb2613d381a746a56bb539175dca109b6a940af7ec3
[INFO] running `"docker" "start" "-a" "e41b50699a26e02f68751fb2613d381a746a56bb539175dca109b6a940af7ec3"`
[INFO] [stderr]     Checking piston2d-graphics v0.26.0
[INFO] [stderr]    Compiling syn v0.13.3
[INFO] [stderr]    Compiling gl_generator v0.6.1
[INFO] [stderr]     Checking png v0.9.0
[INFO] [stderr]    Compiling glutin v0.9.2
[INFO] [stderr]    Compiling gfx_gl v0.4.0
[INFO] [stderr]     Checking wayland-window v0.7.0
[INFO] [stderr]     Checking winit v0.7.6
[INFO] [stderr]     Checking image v0.15.0
[INFO] [stderr]    Compiling gl v0.6.5
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]     Checking piston-gfx_texture v0.26.0
[INFO] [stderr]    Compiling serde_derive v1.0.43
[INFO] [stderr]     Checking gfx_device_gl v0.14.6
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.43.0
[INFO] [stderr]     Checking pistoncore-input v0.19.0
[INFO] [stderr]     Checking pistoncore-window v0.28.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.33.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.39.1
[INFO] [stderr]     Checking piston v0.33.0
[INFO] [stderr]     Checking piston_window v0.70.0
[INFO] [stderr]     Checking minesweeper v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let mut update = true;
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let mut update = true;
[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 55.41s
[INFO] running `"docker" "inspect" "e41b50699a26e02f68751fb2613d381a746a56bb539175dca109b6a940af7ec3"`
[INFO] running `"docker" "rm" "-f" "e41b50699a26e02f68751fb2613d381a746a56bb539175dca109b6a940af7ec3"`
[INFO] [stdout] e41b50699a26e02f68751fb2613d381a746a56bb539175dca109b6a940af7ec3