Dec 19 21:45:57.726 INFO checking Tacklebox/toy-css-parser against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 21:45:57.726 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/Tacklebox/toy-css-parser:/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 21:45:57.896 INFO [stdout] fb6a6ee2b402d8084cc7bc18a28abb7f8522dc855e4f5ed0f4f6e91d8461d2f3
Dec 19 21:45:57.898 INFO running `"docker" "start" "-a" "fb6a6ee2b402d8084cc7bc18a28abb7f8522dc855e4f5ed0f4f6e91d8461d2f3"`
Dec 19 21:45:58.457 INFO [stderr]    Compiling memchr v2.1.0
Dec 19 21:45:59.632 INFO [stderr]     Checking nom v4.1.0
Dec 19 21:46:01.417 INFO [stderr]     Checking parser-exploration v0.1.0 (/opt/crater/workdir)
Dec 19 21:46:01.879 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.44s
Dec 19 21:46:02.129 INFO running `"docker" "inspect" "fb6a6ee2b402d8084cc7bc18a28abb7f8522dc855e4f5ed0f4f6e91d8461d2f3"`
Dec 19 21:46:02.246 INFO running `"docker" "rm" "-f" "fb6a6ee2b402d8084cc7bc18a28abb7f8522dc855e4f5ed0f4f6e91d8461d2f3"`
Dec 19 21:46:02.361 INFO [stdout] fb6a6ee2b402d8084cc7bc18a28abb7f8522dc855e4f5ed0f4f6e91d8461d2f3