[INFO] updating cached repository Wowo10/rust_piston_tetris
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Wowo10/rust_piston_tetris
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Wowo10/rust_piston_tetris" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Wowo10/rust_piston_tetris"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Wowo10/rust_piston_tetris'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Wowo10/rust_piston_tetris" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/Wowo10/rust_piston_tetris"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/Wowo10/rust_piston_tetris'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7af1805c281ae3487149f8ec3df2978281b2b6e7
[INFO] sha for GitHub repo Wowo10/rust_piston_tetris: 7af1805c281ae3487149f8ec3df2978281b2b6e7
[INFO] validating manifest of Wowo10/rust_piston_tetris on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Wowo10/rust_piston_tetris on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Wowo10/rust_piston_tetris
[INFO] finished frobbing Wowo10/rust_piston_tetris
[INFO] frobbed toml for Wowo10/rust_piston_tetris written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Wowo10/rust_piston_tetris/Cargo.toml
[INFO] started frobbing Wowo10/rust_piston_tetris
[INFO] finished frobbing Wowo10/rust_piston_tetris
[INFO] frobbed toml for Wowo10/rust_piston_tetris written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/Wowo10/rust_piston_tetris/Cargo.toml
[INFO] crate Wowo10/rust_piston_tetris already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Wowo10/rust_piston_tetris against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-7/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/Wowo10/rust_piston_tetris:/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=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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 831d4b76abb9e94a1bbe0a9345a9ca1cc82dcede17f8d806e61f29cc59cc66ed
[INFO] running `"docker" "start" "-a" "831d4b76abb9e94a1bbe0a9345a9ca1cc82dcede17f8d806e61f29cc59cc66ed"`
[INFO] [stderr]    Compiling gl_generator v0.6.1
[INFO] [stderr]     Checking gfx_core v0.6.1
[INFO] [stderr]    Compiling gfx_gl v0.3.1
[INFO] [stderr]    Compiling glutin v0.7.4
[INFO] [stderr]     Checking pistoncore-event_loop v0.31.4
[INFO] [stderr]     Checking png v0.6.2
[INFO] [stderr]     Checking wayland-sys v0.7.8
[INFO] [stderr]     Checking wayland-client v0.7.8
[INFO] [stderr]     Checking piston v0.31.4
[INFO] [stderr]     Checking image v0.12.4
[INFO] [stderr]     Checking wayland-window v0.4.4
[INFO] [stderr]     Checking wayland-kbd v0.6.3
[INFO] [stderr]    Compiling gl v0.6.5
[INFO] [stderr]     Checking winit v0.5.11
[INFO] [stderr]     Checking pistoncore-glutin_window v0.35.1
[INFO] [stderr]     Checking gfx v0.14.1
[INFO] [stderr]     Checking gfx_device_gl v0.13.1
[INFO] [stderr]     Checking piston-gfx_texture v0.22.1
[INFO] [stderr]     Checking piston2d-gfx_graphics v0.38.0
[INFO] [stderr]     Checking piston_window v0.64.0
[INFO] [stderr]     Checking wowo_tetris v0.0.9 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/config/mod.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 |                 let mut reader = BufReader::new(&self.file);
[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/config/mod.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 |                 let mut reader = BufReader::new(&self.file);
[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 1m 17s
[INFO] running `"docker" "inspect" "831d4b76abb9e94a1bbe0a9345a9ca1cc82dcede17f8d806e61f29cc59cc66ed"`
[INFO] running `"docker" "rm" "-f" "831d4b76abb9e94a1bbe0a9345a9ca1cc82dcede17f8d806e61f29cc59cc66ed"`
[INFO] [stdout] 831d4b76abb9e94a1bbe0a9345a9ca1cc82dcede17f8d806e61f29cc59cc66ed