Dec 11 22:20:28.289 INFO checking aschampion/test_image_jpeg against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 22:20:28.289 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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 11 22:20:28.445 INFO [stdout] fd9c2eaa3ec1103a0337474057d6ead2ac9db019ea51b35d7d2dbe6967352cdd
Dec 11 22:20:28.447 INFO running `"docker" "start" "-a" "fd9c2eaa3ec1103a0337474057d6ead2ac9db019ea51b35d7d2dbe6967352cdd"`
Dec 11 22:20:29.496 INFO [stderr] usermod: no changes
Dec 11 22:20:29.644 INFO [stderr]     Checking num-integer v0.1.36
Dec 11 22:20:29.644 INFO [stderr]     Checking jpeg-decoder v0.1.14
Dec 11 22:20:30.464 INFO [stderr]     Checking num-iter v0.1.35
Dec 11 22:20:30.464 INFO [stderr]     Checking num-rational v0.1.42
Dec 11 22:20:31.502 INFO [stderr]     Checking png v0.11.0
Dec 11 22:20:33.520 INFO [stderr]     Checking image v0.18.0
Dec 11 22:20:38.831 INFO [stderr]     Checking test_image_jpeg v0.1.0 (/source)
Dec 11 22:20:41.880 INFO [stderr] warning: variable does not need to be mutable
Dec 11 22:20:41.880 INFO [stderr]   --> src/main.rs:24:13
Dec 11 22:20:41.880 INFO [stderr]    |
Dec 11 22:20:41.880 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 11 22:20:41.880 INFO [stderr]    |             ----^^^^^^^
Dec 11 22:20:41.880 INFO [stderr]    |             |
Dec 11 22:20:41.880 INFO [stderr]    |             help: remove this `mut`
Dec 11 22:20:41.880 INFO [stderr]    |
Dec 11 22:20:41.880 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 22:20:41.880 INFO [stderr] 
Dec 11 22:20:41.977 INFO [stderr] warning: variable does not need to be mutable
Dec 11 22:20:41.977 INFO [stderr]   --> src/main.rs:24:13
Dec 11 22:20:41.977 INFO [stderr]    |
Dec 11 22:20:41.977 INFO [stderr] 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Dec 11 22:20:41.977 INFO [stderr]    |             ----^^^^^^^
Dec 11 22:20:41.977 INFO [stderr]    |             |
Dec 11 22:20:41.977 INFO [stderr]    |             help: remove this `mut`
Dec 11 22:20:41.977 INFO [stderr]    |
Dec 11 22:20:41.977 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 22:20:41.977 INFO [stderr] 
Dec 11 22:20:42.004 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.48s
Dec 11 22:20:42.020 INFO [stderr] su: No module specific data is present
Dec 11 22:20:43.210 INFO running `"docker" "inspect" "fd9c2eaa3ec1103a0337474057d6ead2ac9db019ea51b35d7d2dbe6967352cdd"`
Dec 11 22:20:43.534 INFO running `"docker" "rm" "-f" "fd9c2eaa3ec1103a0337474057d6ead2ac9db019ea51b35d7d2dbe6967352cdd"`
Dec 11 22:20:44.008 INFO [stdout] fd9c2eaa3ec1103a0337474057d6ead2ac9db019ea51b35d7d2dbe6967352cdd