Dec 19 16:27:38.794 INFO checking gnuvince/ppbert against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 16:27:38.794 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/gnuvince/ppbert:/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 16:27:39.362 INFO [stdout] a4a0f0655f8d50873c3a44cd3d22486e5a6e6d7da0e4f055d054d558675796f6
Dec 19 16:27:39.364 INFO running `"docker" "start" "-a" "a4a0f0655f8d50873c3a44cd3d22486e5a6e6d7da0e4f055d054d558675796f6"`
Dec 19 16:27:42.137 INFO [stderr]     Checking clap v2.32.0
Dec 19 16:27:42.144 INFO [stderr]     Checking num-bigint v0.2.0
Dec 19 16:27:46.972 INFO [stderr]     Checking ppbert v0.8.5 (/opt/crater/workdir)
Dec 19 16:27:50.342 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.35s
Dec 19 16:27:51.158 INFO running `"docker" "inspect" "a4a0f0655f8d50873c3a44cd3d22486e5a6e6d7da0e4f055d054d558675796f6"`
Dec 19 16:27:51.522 INFO running `"docker" "rm" "-f" "a4a0f0655f8d50873c3a44cd3d22486e5a6e6d7da0e4f055d054d558675796f6"`
Dec 19 16:27:52.019 INFO [stdout] a4a0f0655f8d50873c3a44cd3d22486e5a6e6d7da0e4f055d054d558675796f6