Oct 13 01:00:42.718 INFO checking aschampion/test_image_jpeg against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 01:00:42.718 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-1/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-1/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 13 01:00:43.196 INFO blam! dcaecd2a91e2f7443f957d98cdceffcb04275f97b3e8a1b2173195fc24caf514
Oct 13 01:00:43.199 INFO running `"docker" "start" "-a" "dcaecd2a91e2f7443f957d98cdceffcb04275f97b3e8a1b2173195fc24caf514"`
Oct 13 01:00:44.492 INFO kablam! usermod: no changes
Oct 13 01:00:44.652 INFO kablam!     Checking jpeg-decoder v0.1.14
Oct 13 01:00:46.759 INFO kablam!     Checking image v0.18.0
Oct 13 01:00:52.597 INFO kablam!     Checking test_image_jpeg v0.1.0 (/source)
Oct 13 01:00:55.424 INFO kablam! warning: variable does not need to be mutable
Oct 13 01:00:55.425 INFO kablam!   --> src/main.rs:24:13
Oct 13 01:00:55.426 INFO kablam!    |
Oct 13 01:00:55.427 INFO kablam! 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Oct 13 01:00:55.427 INFO kablam!    |             ----^^^^^^^
Oct 13 01:00:55.428 INFO kablam!    |             |
Oct 13 01:00:55.429 INFO kablam!    |             help: remove this `mut`
Oct 13 01:00:55.429 INFO kablam!    |
Oct 13 01:00:55.430 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 01:00:55.430 INFO kablam! 
Oct 13 01:00:55.609 INFO kablam! warning: variable does not need to be mutable
Oct 13 01:00:55.610 INFO kablam!   --> src/main.rs:24:13
Oct 13 01:00:55.610 INFO kablam!    |
Oct 13 01:00:55.611 INFO kablam! 24 |         let mut encoder = image::png::PNGEncoder::new(&mut writer);
Oct 13 01:00:55.612 INFO kablam!    |             ----^^^^^^^
Oct 13 01:00:55.612 INFO kablam!    |             |
Oct 13 01:00:55.613 INFO kablam!    |             help: remove this `mut`
Oct 13 01:00:55.614 INFO kablam!    |
Oct 13 01:00:55.614 INFO kablam!    = note: #[warn(unused_mut)] on by default
Oct 13 01:00:55.615 INFO kablam! 
Oct 13 01:00:55.657 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 11.14s
Oct 13 01:00:55.670 INFO kablam! su: No module specific data is present
Oct 13 01:00:57.208 INFO running `"docker" "rm" "-f" "dcaecd2a91e2f7443f957d98cdceffcb04275f97b3e8a1b2173195fc24caf514"`
Oct 13 01:00:57.526 INFO blam! dcaecd2a91e2f7443f957d98cdceffcb04275f97b3e8a1b2173195fc24caf514