Dec 19 19:44:35.197 INFO checking bn2302/mandelbrot against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 19:44:35.197 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/bn2302/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 19:44:35.661 INFO [stdout] 3f174dc15e5a31b5a8cbf23d93f4507052a496963b8a4179c58bc16c768e9e3d
Dec 19 19:44:35.665 INFO running `"docker" "start" "-a" "3f174dc15e5a31b5a8cbf23d93f4507052a496963b8a4179c58bc16c768e9e3d"`
Dec 19 19:44:36.723 INFO [stderr]     Checking png v0.7.0
Dec 19 19:44:37.803 INFO [stderr]     Checking image v0.13.0
Dec 19 19:44:41.609 INFO [stderr]     Checking mandelbrot v0.1.0 (/opt/crater/workdir)
Dec 19 19:44:42.329 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.70s
Dec 19 19:44:42.944 INFO running `"docker" "inspect" "3f174dc15e5a31b5a8cbf23d93f4507052a496963b8a4179c58bc16c768e9e3d"`
Dec 19 19:44:43.196 INFO running `"docker" "rm" "-f" "3f174dc15e5a31b5a8cbf23d93f4507052a496963b8a4179c58bc16c768e9e3d"`
Dec 19 19:44:43.481 INFO [stdout] 3f174dc15e5a31b5a8cbf23d93f4507052a496963b8a4179c58bc16c768e9e3d