Dec 19 14:28:23.953 INFO checking kenan-rhoton/rusthammer against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:28:23.953 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/kenan-rhoton/rusthammer:/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 14:28:24.344 INFO [stdout] 1e941c79f333eb7b065428f31843457d2e5520d43f02a8fa1f02074c9e8f34a9
Dec 19 14:28:24.350 INFO running `"docker" "start" "-a" "1e941c79f333eb7b065428f31843457d2e5520d43f02a8fa1f02074c9e8f34a9"`
Dec 19 14:28:25.756 INFO [stderr]    Compiling syn v0.14.0
Dec 19 14:28:31.619 INFO [stderr]    Compiling serde_derive v1.0.62
Dec 19 14:28:45.321 INFO [stderr]     Checking hammer v0.1.0 (/opt/crater/workdir)
Dec 19 14:28:47.022 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.30s
Dec 19 14:28:48.185 INFO running `"docker" "inspect" "1e941c79f333eb7b065428f31843457d2e5520d43f02a8fa1f02074c9e8f34a9"`
Dec 19 14:28:48.506 INFO running `"docker" "rm" "-f" "1e941c79f333eb7b065428f31843457d2e5520d43f02a8fa1f02074c9e8f34a9"`
Dec 19 14:28:48.828 INFO [stdout] 1e941c79f333eb7b065428f31843457d2e5520d43f02a8fa1f02074c9e8f34a9