Dec 19 10:31:27.269 INFO checking r2p2/rust-mandelbrot against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 10:31:27.269 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/r2p2/rust-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 10:31:27.772 INFO [stdout] f0c60c15b431576421fab3547270b7bf23855aca37c3fd752d21b14e40187c77
Dec 19 10:31:27.780 INFO running `"docker" "start" "-a" "f0c60c15b431576421fab3547270b7bf23855aca37c3fd752d21b14e40187c77"`
Dec 19 10:31:29.656 INFO [stderr]     Checking num-bigint v0.1.40
Dec 19 10:31:31.533 INFO [stderr]     Checking num-rational v0.1.39
Dec 19 10:31:32.022 INFO [stderr]     Checking image v0.15.0
Dec 19 10:31:32.023 INFO [stderr]     Checking num v0.1.40
Dec 19 10:31:36.110 INFO [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
Dec 19 10:31:36.784 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.27s
Dec 19 10:31:38.001 INFO running `"docker" "inspect" "f0c60c15b431576421fab3547270b7bf23855aca37c3fd752d21b14e40187c77"`
Dec 19 10:31:38.384 INFO running `"docker" "rm" "-f" "f0c60c15b431576421fab3547270b7bf23855aca37c3fd752d21b14e40187c77"`
Dec 19 10:31:38.680 INFO [stdout] f0c60c15b431576421fab3547270b7bf23855aca37c3fd752d21b14e40187c77