[INFO] updating cached repository adleroliveira/chip8
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/adleroliveira/chip8
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/adleroliveira/chip8" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/adleroliveira/chip8"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/adleroliveira/chip8'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/adleroliveira/chip8" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/adleroliveira/chip8"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/adleroliveira/chip8'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4b85988fa32912334a0f2b3228baea8f30ea8e62
[INFO] sha for GitHub repo adleroliveira/chip8: 4b85988fa32912334a0f2b3228baea8f30ea8e62
[INFO] validating manifest of adleroliveira/chip8 on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of adleroliveira/chip8 on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing adleroliveira/chip8
[INFO] finished frobbing adleroliveira/chip8
[INFO] frobbed toml for adleroliveira/chip8 written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/adleroliveira/chip8/Cargo.toml
[INFO] started frobbing adleroliveira/chip8
[INFO] finished frobbing adleroliveira/chip8
[INFO] frobbed toml for adleroliveira/chip8 written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/adleroliveira/chip8/Cargo.toml
[INFO] crate adleroliveira/chip8 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking adleroliveira/chip8 against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-2/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/adleroliveira/chip8:/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" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 403f39769beec12d976900fa58ea2ea47ef2519bf5e361de8334ba9f4c9f1675
[INFO] running `"docker" "start" "-a" "403f39769beec12d976900fa58ea2ea47ef2519bf5e361de8334ba9f4c9f1675"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling x11-dl v2.18.0
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking wayland-sys v0.12.5
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking pistoncore-input v0.21.0
[INFO] [stderr]     Checking rusttype v0.4.3
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking wayland-client v0.12.5
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking piston2d-graphics v0.26.0
[INFO] [stderr]     Checking rayon v1.0.2
[INFO] [stderr]     Checking wayland-protocols v0.12.5
[INFO] [stderr]     Checking wayland-kbd v0.13.1
[INFO] [stderr]     Checking pistoncore-window v0.32.0
[INFO] [stderr]     Checking wayland-window v0.13.3
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]     Checking pistoncore-event_loop v0.37.0
[INFO] [stderr]     Checking winit v0.12.0
[INFO] [stderr]     Checking piston v0.37.0
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking glutin v0.14.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.47.0
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.53.0
[INFO] [stderr]     Checking chip8 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/debugger.rs:105:25
[INFO] [stderr]     |
[INFO] [stderr] 105 |                     let mut cpu = self.cpu.lock().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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/debugger.rs:105:25
[INFO] [stderr]     |
[INFO] [stderr] 105 |                     let mut cpu = self.cpu.lock().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 48.45s
[INFO] running `"docker" "inspect" "403f39769beec12d976900fa58ea2ea47ef2519bf5e361de8334ba9f4c9f1675"`
[INFO] running `"docker" "rm" "-f" "403f39769beec12d976900fa58ea2ea47ef2519bf5e361de8334ba9f4c9f1675"`
[INFO] [stdout] 403f39769beec12d976900fa58ea2ea47ef2519bf5e361de8334ba9f4c9f1675