Dec 19 19:03:13.437 INFO checking chrissharp80/union_find against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:03:13.437 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/chrissharp80/union_find:/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 19:03:13.848 INFO [stdout] b4e1b5d103dbbcdacd53fd76d9d6d7feb7de11f5418809406a8f3f44c0380e3c
Dec 19 19:03:13.850 INFO running `"docker" "start" "-a" "b4e1b5d103dbbcdacd53fd76d9d6d7feb7de11f5418809406a8f3f44c0380e3c"`
Dec 19 19:03:15.272 INFO [stderr]     Checking text_io v0.1.6
Dec 19 19:03:15.592 INFO [stderr]     Checking union_find v0.1.0 (/opt/crater/workdir)
Dec 19 19:03:16.001 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Dec 19 19:03:16.764 INFO running `"docker" "inspect" "b4e1b5d103dbbcdacd53fd76d9d6d7feb7de11f5418809406a8f3f44c0380e3c"`
Dec 19 19:03:17.043 INFO running `"docker" "rm" "-f" "b4e1b5d103dbbcdacd53fd76d9d6d7feb7de11f5418809406a8f3f44c0380e3c"`
Dec 19 19:03:17.364 INFO [stdout] b4e1b5d103dbbcdacd53fd76d9d6d7feb7de11f5418809406a8f3f44c0380e3c