Dec 04 21:10:55.828 INFO checking cdouglass/morse-practice against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 21:10:55.828 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 21:10:56.189 INFO [stdout] 67ca331fb14834971c58d3a29e7debe1e5e9d5d9f9f335e185ba8a86b40ed755
Dec 04 21:10:56.192 INFO running `"docker" "start" "-a" "67ca331fb14834971c58d3a29e7debe1e5e9d5d9f9f335e185ba8a86b40ed755"`
Dec 04 21:10:56.800 INFO [stderr] usermod: no changes
Dec 04 21:10:56.866 INFO [stderr]     Checking rand v0.4.2
Dec 04 21:10:56.866 INFO [stderr]    Compiling serde_derive_internals v0.20.0
Dec 04 21:11:00.399 INFO [stderr]    Compiling serde_derive v1.0.29
Dec 04 21:11:08.152 INFO [stderr]     Checking docopt v0.8.3
Dec 04 21:11:09.771 INFO [stderr]     Checking morse v0.1.0 (/source)
Dec 04 21:11:12.732 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.92s
Dec 04 21:11:12.736 INFO [stderr] su: No module specific data is present
Dec 04 21:11:13.963 INFO running `"docker" "inspect" "67ca331fb14834971c58d3a29e7debe1e5e9d5d9f9f335e185ba8a86b40ed755"`
Dec 04 21:11:14.329 INFO running `"docker" "rm" "-f" "67ca331fb14834971c58d3a29e7debe1e5e9d5d9f9f335e185ba8a86b40ed755"`
Dec 04 21:11:14.621 INFO [stdout] 67ca331fb14834971c58d3a29e7debe1e5e9d5d9f9f335e185ba8a86b40ed755