Dec 19 20:18:10.003 INFO checking aschampion/test_image_jpeg against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 20:18:10.003 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/aschampion/test_image_jpeg:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 20:18:10.268 INFO [stdout] 26a5d879894e92eeb4cdb3cc34c699729269ec46c8ab41bea3f75bd74f8957d1
Dec 19 20:18:10.270 INFO running `"docker" "start" "-a" "26a5d879894e92eeb4cdb3cc34c699729269ec46c8ab41bea3f75bd74f8957d1"`
Dec 19 20:18:10.856 INFO [stderr]     Checking rayon v1.0.0
Dec 19 20:18:14.067 INFO [stderr]     Checking jpeg-decoder v0.1.14
Dec 19 20:18:15.470 INFO [stderr]     Checking image v0.18.0
Dec 19 20:18:19.880 INFO [stderr]     Checking test_image_jpeg v0.1.0 (/opt/crater/workdir)
Dec 19 20:18:20.644 INFO [stderr] warning: variable does not need to be mutable
Dec 19 20:18:20.644 INFO [stderr]   --> src/main.rs:24:13
Dec 19 20:18:20.644 INFO [stderr]    |
Dec 19 20:18:20.644 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 19 20:18:20.644 INFO [stderr]    |             ----^^^^^^^
Dec 19 20:18:20.644 INFO [stderr]    |             |
Dec 19 20:18:20.644 INFO [stderr]    |             help: remove this `mut`
Dec 19 20:18:20.644 INFO [stderr]    |
Dec 19 20:18:20.644 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 20:18:20.644 INFO [stderr] 
Dec 19 20:18:21.072 INFO [stderr] warning: variable does not need to be mutable
Dec 19 20:18:21.072 INFO [stderr]   --> src/main.rs:24:13
Dec 19 20:18:21.072 INFO [stderr]    |
Dec 19 20:18:21.072 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 19 20:18:21.072 INFO [stderr]    |             ----^^^^^^^
Dec 19 20:18:21.072 INFO [stderr]    |             |
Dec 19 20:18:21.072 INFO [stderr]    |             help: remove this `mut`
Dec 19 20:18:21.072 INFO [stderr]    |
Dec 19 20:18:21.072 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 20:18:21.072 INFO [stderr] 
Dec 19 20:18:21.119 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.35s
Dec 19 20:18:22.087 INFO running `"docker" "inspect" "26a5d879894e92eeb4cdb3cc34c699729269ec46c8ab41bea3f75bd74f8957d1"`
Dec 19 20:18:22.394 INFO running `"docker" "rm" "-f" "26a5d879894e92eeb4cdb3cc34c699729269ec46c8ab41bea3f75bd74f8957d1"`
Dec 19 20:18:22.780 INFO [stdout] 26a5d879894e92eeb4cdb3cc34c699729269ec46c8ab41bea3f75bd74f8957d1