Dec 18 05:01:55.077 INFO checking UnlawfulMonad/regtest against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 05:01:55.077 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/UnlawfulMonad/regtest:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 05:01:55.921 INFO [stdout] 7f31523ac9e424e5d1e5fe11e15c57efb416a23e191e9b0ff03e2ff2ae938b6e
Dec 18 05:01:55.924 INFO running `"docker" "start" "-a" "7f31523ac9e424e5d1e5fe11e15c57efb416a23e191e9b0ff03e2ff2ae938b6e"`
Dec 18 05:02:02.249 INFO [stderr]     Checking nix v0.5.1
Dec 18 05:02:02.256 INFO [stderr]     Checking regex v1.0.1
Dec 18 05:02:06.516 INFO [stderr]     Checking rustyline v1.0.0
Dec 18 05:02:07.328 INFO [stderr]     Checking regtest v0.3.5 (/opt/crater/workdir)
Dec 18 05:02:08.352 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.22s
Dec 18 05:02:08.998 INFO running `"docker" "inspect" "7f31523ac9e424e5d1e5fe11e15c57efb416a23e191e9b0ff03e2ff2ae938b6e"`
Dec 18 05:02:09.326 INFO running `"docker" "rm" "-f" "7f31523ac9e424e5d1e5fe11e15c57efb416a23e191e9b0ff03e2ff2ae938b6e"`
Dec 18 05:02:09.636 INFO [stdout] 7f31523ac9e424e5d1e5fe11e15c57efb416a23e191e9b0ff03e2ff2ae938b6e