Dec 19 09:14:19.668 INFO checking scrolliris/nib against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 09:14:19.668 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/scrolliris/nib:/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 09:14:20.221 INFO [stdout] 8600013855b4e62d430e7e16d86b305d445cbabfcc37c386e49f3acb4ef75e5e
Dec 19 09:14:20.224 INFO running `"docker" "start" "-a" "8600013855b4e62d430e7e16d86b305d445cbabfcc37c386e49f3acb4ef75e5e"`
Dec 19 09:14:22.500 INFO [stderr]    Compiling syn v0.14.9
Dec 19 09:14:29.412 INFO [stderr]    Compiling structopt-derive v0.2.10
Dec 19 09:14:31.831 INFO [stderr]     Checking structopt v0.2.10
Dec 19 09:14:32.042 INFO [stderr]     Checking nib v0.0.1 (/opt/crater/workdir)
Dec 19 09:14:32.420 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.06s
Dec 19 09:14:32.847 INFO running `"docker" "inspect" "8600013855b4e62d430e7e16d86b305d445cbabfcc37c386e49f3acb4ef75e5e"`
Dec 19 09:14:33.022 INFO running `"docker" "rm" "-f" "8600013855b4e62d430e7e16d86b305d445cbabfcc37c386e49f3acb4ef75e5e"`
Dec 19 09:14:33.312 INFO [stdout] 8600013855b4e62d430e7e16d86b305d445cbabfcc37c386e49f3acb4ef75e5e