Dec 18 03:48:10.275 INFO checking aschampion/test_image_jpeg against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 03:48:10.275 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 03:48:10.520 INFO [stdout] 431018148a89cc0504a6c118c5147c0fca144517f7c012e1bec3bd84fc1b3d5f
Dec 18 03:48:10.522 INFO running `"docker" "start" "-a" "431018148a89cc0504a6c118c5147c0fca144517f7c012e1bec3bd84fc1b3d5f"`
Dec 18 03:48:11.472 INFO [stderr]     Checking num-integer v0.1.36
Dec 18 03:48:11.477 INFO [stderr]     Checking rayon-core v1.4.0
Dec 18 03:48:12.051 INFO [stderr]     Checking num-iter v0.1.35
Dec 18 03:48:12.051 INFO [stderr]     Checking num-rational v0.1.42
Dec 18 03:48:12.701 INFO [stderr]     Checking png v0.11.0
Dec 18 03:48:12.800 INFO [stderr]     Checking rayon v1.0.0
Dec 18 03:48:16.408 INFO [stderr]     Checking jpeg-decoder v0.1.14
Dec 18 03:48:17.629 INFO [stderr]     Checking image v0.18.0
Dec 18 03:48:22.390 INFO [stderr]     Checking test_image_jpeg v0.1.0 (/opt/crater/workdir)
Dec 18 03:48:23.111 INFO [stderr] warning: variable does not need to be mutable
Dec 18 03:48:23.112 INFO [stderr]   --> src/main.rs:24:13
Dec 18 03:48:23.112 INFO [stderr]    |
Dec 18 03:48:23.112 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 18 03:48:23.112 INFO [stderr]    |             ----^^^^^^^
Dec 18 03:48:23.112 INFO [stderr]    |             |
Dec 18 03:48:23.112 INFO [stderr]    |             help: remove this `mut`
Dec 18 03:48:23.112 INFO [stderr]    |
Dec 18 03:48:23.112 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 03:48:23.112 INFO [stderr] 
Dec 18 03:48:23.228 INFO [stderr] warning: variable does not need to be mutable
Dec 18 03:48:23.228 INFO [stderr]   --> src/main.rs:24:13
Dec 18 03:48:23.228 INFO [stderr]    |
Dec 18 03:48:23.228 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 18 03:48:23.228 INFO [stderr]    |             ----^^^^^^^
Dec 18 03:48:23.228 INFO [stderr]    |             |
Dec 18 03:48:23.228 INFO [stderr]    |             help: remove this `mut`
Dec 18 03:48:23.228 INFO [stderr]    |
Dec 18 03:48:23.228 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 03:48:23.228 INFO [stderr] 
Dec 18 03:48:23.280 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.88s
Dec 18 03:48:24.191 INFO running `"docker" "inspect" "431018148a89cc0504a6c118c5147c0fca144517f7c012e1bec3bd84fc1b3d5f"`
Dec 18 03:48:24.595 INFO running `"docker" "rm" "-f" "431018148a89cc0504a6c118c5147c0fca144517f7c012e1bec3bd84fc1b3d5f"`
Dec 18 03:48:24.848 INFO [stdout] 431018148a89cc0504a6c118c5147c0fca144517f7c012e1bec3bd84fc1b3d5f