Dec 19 21:53:48.841 INFO checking Sigumo/mandelbrot against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 21:53:48.841 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/Sigumo/mandelbrot:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:53:49.216 INFO [stdout] 9d4a4d1a791d92f579514270e106fe24c866d75f4157388c4e4f545a1969c560
Dec 19 21:53:49.218 INFO running `"docker" "start" "-a" "9d4a4d1a791d92f579514270e106fe24c866d75f4157388c4e4f545a1969c560"`
Dec 19 21:53:50.800 INFO [stderr]     Checking png v0.7.0
Dec 19 21:53:52.100 INFO [stderr]     Checking image v0.13.0
Dec 19 21:53:56.069 INFO [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
Dec 19 21:53:57.412 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.78s
Dec 19 21:53:58.490 INFO running `"docker" "inspect" "9d4a4d1a791d92f579514270e106fe24c866d75f4157388c4e4f545a1969c560"`
Dec 19 21:53:58.872 INFO running `"docker" "rm" "-f" "9d4a4d1a791d92f579514270e106fe24c866d75f4157388c4e4f545a1969c560"`
Dec 19 21:53:59.160 INFO [stdout] 9d4a4d1a791d92f579514270e106fe24c866d75f4157388c4e4f545a1969c560