Dec 19 20:18:10.001 INFO checking aschampion/test_image_jpeg against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 20:18:10.001 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 20:18:10.224 INFO [stdout] 73c7f287cfc98edf88bb0ecdf9c88a113e094bfca8b78e88c36e72a2b62b7d4d
Dec 19 20:18:10.226 INFO running `"docker" "start" "-a" "73c7f287cfc98edf88bb0ecdf9c88a113e094bfca8b78e88c36e72a2b62b7d4d"`
Dec 19 20:18:10.820 INFO [stderr]     Checking image v0.18.0
Dec 19 20:18:15.168 INFO [stderr]     Checking test_image_jpeg v0.1.0 (/opt/crater/workdir)
Dec 19 20:18:16.000 INFO [stderr] warning: variable does not need to be mutable
Dec 19 20:18:16.000 INFO [stderr]   --> src/main.rs:24:13
Dec 19 20:18:16.000 INFO [stderr]    |
Dec 19 20:18:16.000 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 19 20:18:16.000 INFO [stderr]    |             ----^^^^^^^
Dec 19 20:18:16.000 INFO [stderr]    |             |
Dec 19 20:18:16.000 INFO [stderr]    |             help: remove this `mut`
Dec 19 20:18:16.001 INFO [stderr]    |
Dec 19 20:18:16.001 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 20:18:16.001 INFO [stderr] 
Dec 19 20:18:16.153 INFO [stderr] warning: variable does not need to be mutable
Dec 19 20:18:16.153 INFO [stderr]   --> src/main.rs:24:13
Dec 19 20:18:16.154 INFO [stderr]    |
Dec 19 20:18:16.154 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 19 20:18:16.154 INFO [stderr]    |             ----^^^^^^^
Dec 19 20:18:16.155 INFO [stderr]    |             |
Dec 19 20:18:16.155 INFO [stderr]    |             help: remove this `mut`
Dec 19 20:18:16.155 INFO [stderr]    |
Dec 19 20:18:16.155 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 20:18:16.156 INFO [stderr] 
Dec 19 20:18:16.183 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.43s
Dec 19 20:18:17.944 INFO running `"docker" "inspect" "73c7f287cfc98edf88bb0ecdf9c88a113e094bfca8b78e88c36e72a2b62b7d4d"`
Dec 19 20:18:18.286 INFO running `"docker" "rm" "-f" "73c7f287cfc98edf88bb0ecdf9c88a113e094bfca8b78e88c36e72a2b62b7d4d"`
Dec 19 20:18:18.656 INFO [stdout] 73c7f287cfc98edf88bb0ecdf9c88a113e094bfca8b78e88c36e72a2b62b7d4d