Dec 04 22:21:07.896 INFO checking aschampion/test_image_jpeg against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 22:21:07.896 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 22:21:08.142 INFO [stdout] d32f7b1bc5c3a9849a9040327808d506e7ee39f5a4e63f75e5bb92965ade0f9c
Dec 04 22:21:08.144 INFO running `"docker" "start" "-a" "d32f7b1bc5c3a9849a9040327808d506e7ee39f5a4e63f75e5bb92965ade0f9c"`
Dec 04 22:21:08.619 INFO [stderr] usermod: no changes
Dec 04 22:21:08.730 INFO [stderr]     Checking rayon v1.0.0
Dec 04 22:21:12.631 INFO [stderr]     Checking jpeg-decoder v0.1.14
Dec 04 22:21:14.400 INFO [stderr]     Checking image v0.18.0
Dec 04 22:21:19.939 INFO [stderr]     Checking test_image_jpeg v0.1.0 (/source)
Dec 04 22:21:22.438 INFO [stderr] warning: variable does not need to be mutable
Dec 04 22:21:22.438 INFO [stderr]   --> src/main.rs:24:13
Dec 04 22:21:22.438 INFO [stderr]    |
Dec 04 22:21:22.438 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 04 22:21:22.438 INFO [stderr]    |             ----^^^^^^^
Dec 04 22:21:22.438 INFO [stderr]    |             |
Dec 04 22:21:22.438 INFO [stderr]    |             help: remove this `mut`
Dec 04 22:21:22.438 INFO [stderr]    |
Dec 04 22:21:22.438 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 22:21:22.438 INFO [stderr] 
Dec 04 22:21:22.727 INFO [stderr] warning: variable does not need to be mutable
Dec 04 22:21:22.727 INFO [stderr]   --> src/main.rs:24:13
Dec 04 22:21:22.727 INFO [stderr]    |
Dec 04 22:21:22.727 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 04 22:21:22.727 INFO [stderr]    |             ----^^^^^^^
Dec 04 22:21:22.727 INFO [stderr]    |             |
Dec 04 22:21:22.727 INFO [stderr]    |             help: remove this `mut`
Dec 04 22:21:22.727 INFO [stderr]    |
Dec 04 22:21:22.727 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 04 22:21:22.727 INFO [stderr] 
Dec 04 22:21:22.747 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.10s
Dec 04 22:21:22.749 INFO [stderr] su: No module specific data is present
Dec 04 22:21:24.177 INFO running `"docker" "inspect" "d32f7b1bc5c3a9849a9040327808d506e7ee39f5a4e63f75e5bb92965ade0f9c"`
Dec 04 22:21:24.553 INFO running `"docker" "rm" "-f" "d32f7b1bc5c3a9849a9040327808d506e7ee39f5a4e63f75e5bb92965ade0f9c"`
Dec 04 22:21:24.871 INFO [stdout] d32f7b1bc5c3a9849a9040327808d506e7ee39f5a4e63f75e5bb92965ade0f9c