Dec 19 10:39:51.618 INFO checking puzza007/ksero against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 10:39:51.618 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/puzza007/ksero:/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 10:39:51.909 INFO [stdout] bec9c04bb03e30022ab68399a0d2b1be990d4223796c063588a0650adee17a70
Dec 19 10:39:51.914 INFO running `"docker" "start" "-a" "bec9c04bb03e30022ab68399a0d2b1be990d4223796c063588a0650adee17a70"`
Dec 19 10:39:52.627 INFO [stderr]     Checking crossbeam-epoch v0.3.1
Dec 19 10:39:53.126 INFO [stderr]     Checking crossbeam-deque v0.2.0
Dec 19 10:39:53.452 INFO [stderr]     Checking rayon-core v1.4.1
Dec 19 10:39:54.218 INFO [stderr]     Checking rayon v1.0.3
Dec 19 10:39:57.542 INFO [stderr]     Checking ksero v0.1.0 (/opt/crater/workdir)
Dec 19 10:39:58.270 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.71s
Dec 19 10:39:58.693 INFO running `"docker" "inspect" "bec9c04bb03e30022ab68399a0d2b1be990d4223796c063588a0650adee17a70"`
Dec 19 10:39:58.830 INFO running `"docker" "rm" "-f" "bec9c04bb03e30022ab68399a0d2b1be990d4223796c063588a0650adee17a70"`
Dec 19 10:39:58.928 INFO [stdout] bec9c04bb03e30022ab68399a0d2b1be990d4223796c063588a0650adee17a70