Dec 19 19:14:41.132 INFO checking cdouglass/morse-practice against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 19:14:41.132 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/cdouglass/morse-practice:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:14:41.355 INFO [stdout] 58d1cab8aa45d89e5783ead9f3c40a88f43c3b212d0a99a069b6085565d8feb8
Dec 19 19:14:41.357 INFO running `"docker" "start" "-a" "58d1cab8aa45d89e5783ead9f3c40a88f43c3b212d0a99a069b6085565d8feb8"`
Dec 19 19:14:42.438 INFO [stderr]     Checking serde v1.0.29
Dec 19 19:14:42.439 INFO [stderr]     Checking rand v0.4.2
Dec 19 19:14:51.915 INFO [stderr]     Checking docopt v0.8.3
Dec 19 19:14:52.970 INFO [stderr]     Checking morse v0.1.0 (/opt/crater/workdir)
Dec 19 19:14:55.310 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.95s
Dec 19 19:14:55.856 INFO running `"docker" "inspect" "58d1cab8aa45d89e5783ead9f3c40a88f43c3b212d0a99a069b6085565d8feb8"`
Dec 19 19:14:55.954 INFO running `"docker" "rm" "-f" "58d1cab8aa45d89e5783ead9f3c40a88f43c3b212d0a99a069b6085565d8feb8"`
Dec 19 19:14:56.203 INFO [stdout] 58d1cab8aa45d89e5783ead9f3c40a88f43c3b212d0a99a069b6085565d8feb8