Dec 19 21:28:56.497 INFO checking UseK/mandelbrot against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 21:28:56.497 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/UseK/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:28:56.924 INFO [stdout] b30a8e0df4ac97436bcb4495812c37cccf6a4314a64836b25811bddd9e46dfdf
Dec 19 21:28:56.930 INFO running `"docker" "start" "-a" "b30a8e0df4ac97436bcb4495812c37cccf6a4314a64836b25811bddd9e46dfdf"`
Dec 19 21:28:58.557 INFO [stderr]     Checking num-bigint v0.1.44
Dec 19 21:29:00.525 INFO [stderr]     Checking num-rational v0.1.42
Dec 19 21:29:01.316 INFO [stderr]     Checking num v0.1.42
Dec 19 21:29:01.700 INFO [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
Dec 19 21:29:02.336 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.85s
Dec 19 21:29:03.286 INFO running `"docker" "inspect" "b30a8e0df4ac97436bcb4495812c37cccf6a4314a64836b25811bddd9e46dfdf"`
Dec 19 21:29:03.606 INFO running `"docker" "rm" "-f" "b30a8e0df4ac97436bcb4495812c37cccf6a4314a64836b25811bddd9e46dfdf"`
Dec 19 21:29:03.877 INFO [stdout] b30a8e0df4ac97436bcb4495812c37cccf6a4314a64836b25811bddd9e46dfdf