Dec 18 12:52:08.895 INFO checking prefixopt-0.4.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 12:52:08.896 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/prefixopt/0.4.0:/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 12:52:09.035 INFO [stdout] 4939d906ceda0fdd74e30b51a8e4a67ae0bb5a09ac0e23b0df47815a65c67256
Dec 18 12:52:09.037 INFO running `"docker" "start" "-a" "4939d906ceda0fdd74e30b51a8e4a67ae0bb5a09ac0e23b0df47815a65c67256"`
Dec 18 12:52:09.787 INFO [stderr]     Checking scopeguard v0.2.0
Dec 18 12:52:09.995 INFO [stderr]     Checking map_in_place v0.1.0
Dec 18 12:52:10.350 INFO [stderr]     Checking prefixopt v0.4.0 (/opt/crater/workdir)
Dec 18 12:52:11.759 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.01s
Dec 18 12:52:12.072 INFO running `"docker" "inspect" "4939d906ceda0fdd74e30b51a8e4a67ae0bb5a09ac0e23b0df47815a65c67256"`
Dec 18 12:52:12.221 INFO running `"docker" "rm" "-f" "4939d906ceda0fdd74e30b51a8e4a67ae0bb5a09ac0e23b0df47815a65c67256"`
Dec 18 12:52:12.451 INFO [stdout] 4939d906ceda0fdd74e30b51a8e4a67ae0bb5a09ac0e23b0df47815a65c67256