Dec 19 15:18:15.617 INFO checking jearbear/dots against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:18:15.617 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/jearbear/dots:/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 15:18:16.072 INFO [stdout] 4a353f9100eec229fedf30d8521ca14157f1df54d44613e32bc0c82bb87f0181
Dec 19 15:18:16.079 INFO running `"docker" "start" "-a" "4a353f9100eec229fedf30d8521ca14157f1df54d44613e32bc0c82bb87f0181"`
Dec 19 15:18:17.951 INFO [stderr]     Checking dirs v1.0.4
Dec 19 15:18:17.960 INFO [stderr]    Compiling syn v0.15.23
Dec 19 15:18:29.492 INFO [stderr]    Compiling structopt-derive v0.2.14
Dec 19 15:18:33.321 INFO [stderr]     Checking structopt v0.2.14
Dec 19 15:18:33.676 INFO [stderr]     Checking dots v0.1.0 (/opt/crater/workdir)
Dec 19 15:18:35.028 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.20s
Dec 19 15:18:36.066 INFO running `"docker" "inspect" "4a353f9100eec229fedf30d8521ca14157f1df54d44613e32bc0c82bb87f0181"`
Dec 19 15:18:36.395 INFO running `"docker" "rm" "-f" "4a353f9100eec229fedf30d8521ca14157f1df54d44613e32bc0c82bb87f0181"`
Dec 19 15:18:36.804 INFO [stdout] 4a353f9100eec229fedf30d8521ca14157f1df54d44613e32bc0c82bb87f0181