Dec 19 18:17:57.202 INFO checking davesque/sierpinski against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 18:17:57.203 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/davesque/sierpinski:/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 18:17:57.738 INFO [stdout] 723c60f7c4e0c2d7fc938ea27a3bdae2e89fa7df19bea240598e9593ac447d98
Dec 19 18:17:57.740 INFO running `"docker" "start" "-a" "723c60f7c4e0c2d7fc938ea27a3bdae2e89fa7df19bea240598e9593ac447d98"`
Dec 19 18:17:59.951 INFO [stderr]     Checking deflate v0.7.4
Dec 19 18:18:00.882 INFO [stderr]     Checking png v0.6.2
Dec 19 18:18:01.980 INFO [stderr]     Checking image v0.12.3
Dec 19 18:18:05.798 INFO [stderr]     Checking sierpinski v0.1.0 (/opt/crater/workdir)
Dec 19 18:18:06.385 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.56s
Dec 19 18:18:07.717 INFO running `"docker" "inspect" "723c60f7c4e0c2d7fc938ea27a3bdae2e89fa7df19bea240598e9593ac447d98"`
Dec 19 18:18:07.982 INFO running `"docker" "rm" "-f" "723c60f7c4e0c2d7fc938ea27a3bdae2e89fa7df19bea240598e9593ac447d98"`
Dec 19 18:18:08.250 INFO [stdout] 723c60f7c4e0c2d7fc938ea27a3bdae2e89fa7df19bea240598e9593ac447d98