Dec 19 12:40:03.506 INFO checking mickjohn/red_or_black against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:40:03.506 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/mickjohn/red_or_black:/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 12:40:03.940 INFO [stdout] c4fac59515df78c8d6fad158341b5d10a3df751952680d445279ffd6b6fdc08e
Dec 19 12:40:03.942 INFO running `"docker" "start" "-a" "c4fac59515df78c8d6fad158341b5d10a3df751952680d445279ffd6b6fdc08e"`
Dec 19 12:40:05.868 INFO [stderr]     Checking mio-extras v2.0.5
Dec 19 12:40:05.868 INFO [stderr]     Checking serde_json v1.0.27
Dec 19 12:40:05.892 INFO [stderr]    Compiling serde_derive v1.0.78
Dec 19 12:40:07.112 INFO [stderr]     Checking ws v0.7.8
Dec 19 12:40:25.401 INFO [stderr]     Checking websocket_red_or_black v0.1.0 (/opt/crater/workdir)
Dec 19 12:40:28.716 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.07s
Dec 19 12:40:30.099 INFO running `"docker" "inspect" "c4fac59515df78c8d6fad158341b5d10a3df751952680d445279ffd6b6fdc08e"`
Dec 19 12:40:30.442 INFO running `"docker" "rm" "-f" "c4fac59515df78c8d6fad158341b5d10a3df751952680d445279ffd6b6fdc08e"`
Dec 19 12:40:30.796 INFO [stdout] c4fac59515df78c8d6fad158341b5d10a3df751952680d445279ffd6b6fdc08e