Dec 19 20:50:43.321 INFO checking akxcv/b against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 20:50:43.321 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/akxcv/b:/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 20:50:43.846 INFO [stdout] e9113026b4b057e79c8f0bb0bc276075d031a6b5dee6ac242f74533258f8e394
Dec 19 20:50:43.852 INFO running `"docker" "start" "-a" "e9113026b4b057e79c8f0bb0bc276075d031a6b5dee6ac242f74533258f8e394"`
Dec 19 20:50:44.847 INFO [stderr]     Checking termion v1.5.1
Dec 19 20:50:44.857 INFO [stderr]     Checking serde_yaml v0.8.8
Dec 19 20:50:44.858 INFO [stderr]     Checking env_logger v0.4.3
Dec 19 20:50:46.029 INFO [stderr]     Checking skim v0.5.2
Dec 19 20:50:47.858 INFO [stderr]     Checking b v0.1.0 (/opt/crater/workdir)
Dec 19 20:50:48.916 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.22s
Dec 19 20:50:49.556 INFO running `"docker" "inspect" "e9113026b4b057e79c8f0bb0bc276075d031a6b5dee6ac242f74533258f8e394"`
Dec 19 20:50:49.759 INFO running `"docker" "rm" "-f" "e9113026b4b057e79c8f0bb0bc276075d031a6b5dee6ac242f74533258f8e394"`
Dec 19 20:50:50.000 INFO [stdout] e9113026b4b057e79c8f0bb0bc276075d031a6b5dee6ac242f74533258f8e394