Dec 19 14:33:57.049 INFO checking kb3udn/guessing_game against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:33:57.049 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/kb3udn/guessing_game:/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 14:33:57.414 INFO [stdout] ca4bf337d4dcb4b4f9ac21a3af08b7323e06d7d1c29741528345d9731fb5eced
Dec 19 14:33:57.422 INFO running `"docker" "start" "-a" "ca4bf337d4dcb4b4f9ac21a3af08b7323e06d7d1c29741528345d9731fb5eced"`
Dec 19 14:33:58.565 INFO [stderr]    Compiling libc v0.2.44
Dec 19 14:34:00.463 INFO [stderr]     Checking rand v0.4.3
Dec 19 14:34:01.876 INFO [stderr]     Checking rand v0.3.22
Dec 19 14:34:02.062 INFO [stderr]     Checking guessing_game v0.1.0 (/opt/crater/workdir)
Dec 19 14:34:02.361 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.82s
Dec 19 14:34:02.742 INFO running `"docker" "inspect" "ca4bf337d4dcb4b4f9ac21a3af08b7323e06d7d1c29741528345d9731fb5eced"`
Dec 19 14:34:02.880 INFO running `"docker" "rm" "-f" "ca4bf337d4dcb4b4f9ac21a3af08b7323e06d7d1c29741528345d9731fb5eced"`
Dec 19 14:34:02.994 INFO [stdout] ca4bf337d4dcb4b4f9ac21a3af08b7323e06d7d1c29741528345d9731fb5eced