Dec 19 12:28:09.871 INFO checking monjohn/prufen against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:28:09.871 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/monjohn/prufen:/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 12:28:10.182 INFO [stdout] b9c12b2f7120e73e2e19f40d264c92b4b859087f44b6574aa000d27777893085
Dec 19 12:28:10.192 INFO running `"docker" "start" "-a" "b9c12b2f7120e73e2e19f40d264c92b4b859087f44b6574aa000d27777893085"`
Dec 19 12:28:11.058 INFO [stderr]     Checking csv-core v0.1.4
Dec 19 12:28:11.554 INFO [stderr]     Checking csv v1.0.0-beta.5
Dec 19 12:28:12.881 INFO [stderr]     Checking prufen v0.1.2 (/opt/crater/workdir)
Dec 19 12:28:13.544 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.55s
Dec 19 12:28:14.150 INFO running `"docker" "inspect" "b9c12b2f7120e73e2e19f40d264c92b4b859087f44b6574aa000d27777893085"`
Dec 19 12:28:14.394 INFO running `"docker" "rm" "-f" "b9c12b2f7120e73e2e19f40d264c92b4b859087f44b6574aa000d27777893085"`
Dec 19 12:28:14.724 INFO [stdout] b9c12b2f7120e73e2e19f40d264c92b4b859087f44b6574aa000d27777893085