Dec 19 10:53:05.649 INFO checking pjo336/grindstone against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 10:53:05.649 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/pjo336/grindstone:/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 10:53:06.151 INFO [stdout] 27383c4cc49b104cda6df4f9ceb404a01621c584d01302b3e859aadb9dc4b7a3
Dec 19 10:53:06.156 INFO running `"docker" "start" "-a" "27383c4cc49b104cda6df4f9ceb404a01621c584d01302b3e859aadb9dc4b7a3"`
Dec 19 10:53:07.624 INFO [stderr]     Checking serde_yaml v0.8.2
Dec 19 10:53:09.102 INFO [stderr]     Checking grindstone v0.1.0 (/opt/crater/workdir)
Dec 19 10:53:09.529 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.98s
Dec 19 10:53:11.060 INFO running `"docker" "inspect" "27383c4cc49b104cda6df4f9ceb404a01621c584d01302b3e859aadb9dc4b7a3"`
Dec 19 10:53:11.379 INFO running `"docker" "rm" "-f" "27383c4cc49b104cda6df4f9ceb404a01621c584d01302b3e859aadb9dc4b7a3"`
Dec 19 10:53:11.756 INFO [stdout] 27383c4cc49b104cda6df4f9ceb404a01621c584d01302b3e859aadb9dc4b7a3