Dec 19 08:05:49.519 INFO checking steveklabnik/adventure2 against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 08:05:49.519 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/steveklabnik/adventure2:/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 08:05:49.986 INFO [stdout] d2c3d8c09d256e98fbba0b1ce02c330b78e4038769d085d26049f3ef6d52297d
Dec 19 08:05:49.988 INFO running `"docker" "start" "-a" "d2c3d8c09d256e98fbba0b1ce02c330b78e4038769d085d26049f3ef6d52297d"`
Dec 19 08:05:51.728 INFO [stderr]    Compiling syn v0.15.12
Dec 19 08:06:01.228 INFO [stderr]    Compiling serde_derive v1.0.80
Dec 19 08:06:16.806 INFO [stderr]     Checking adventure v0.1.0 (/opt/crater/workdir)
Dec 19 08:06:17.642 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.03s
Dec 19 08:06:19.803 INFO running `"docker" "inspect" "d2c3d8c09d256e98fbba0b1ce02c330b78e4038769d085d26049f3ef6d52297d"`
Dec 19 08:06:20.182 INFO running `"docker" "rm" "-f" "d2c3d8c09d256e98fbba0b1ce02c330b78e4038769d085d26049f3ef6d52297d"`
Dec 19 08:06:20.508 INFO [stdout] d2c3d8c09d256e98fbba0b1ce02c330b78e4038769d085d26049f3ef6d52297d