Dec 19 12:43:53.726 INFO checking mfs/hc against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:43:53.726 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/mfs/hc:/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 12:43:53.876 INFO [stdout] 1e64b9d024e8419f3094a0dd001e24cb107894f833f2fc6a261fe57b3f92313b
Dec 19 12:43:53.879 INFO running `"docker" "start" "-a" "1e64b9d024e8419f3094a0dd001e24cb107894f833f2fc6a261fe57b3f92313b"`
Dec 19 12:43:55.080 INFO [stderr]     Checking atty v0.2.6
Dec 19 12:43:55.080 INFO [stderr]     Checking rand v0.4.2
Dec 19 12:43:55.390 INFO [stderr]     Checking clap v2.29.0
Dec 19 12:44:02.904 INFO [stderr]     Checking hc v0.1.0 (/opt/crater/workdir)
Dec 19 12:44:03.253 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.29s
Dec 19 12:44:03.646 INFO running `"docker" "inspect" "1e64b9d024e8419f3094a0dd001e24cb107894f833f2fc6a261fe57b3f92313b"`
Dec 19 12:44:03.845 INFO running `"docker" "rm" "-f" "1e64b9d024e8419f3094a0dd001e24cb107894f833f2fc6a261fe57b3f92313b"`
Dec 19 12:44:03.945 INFO [stdout] 1e64b9d024e8419f3094a0dd001e24cb107894f833f2fc6a261fe57b3f92313b