Oct 13 06:13:41.413 INFO checking workerpool-1.1.1 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 06:13:41.413 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-4/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-4/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 13 06:13:41.869 INFO blam! 141844d6faf25863b57d8a4c73eddaa4340fda4baa39666e250fbeebe011005d
Oct 13 06:13:41.872 INFO running `"docker" "start" "-a" "141844d6faf25863b57d8a4c73eddaa4340fda4baa39666e250fbeebe011005d"`
Oct 13 06:13:43.459 INFO kablam! usermod: no changes
Oct 13 06:13:43.548 INFO kablam!     Checking workerpool v1.1.1 (/source)
Oct 13 06:13:44.804 INFO kablam! warning: unused arithmetic operation which must be used
Oct 13 06:13:44.804 INFO kablam!     --> src/lib.rs:1070:46
Oct 13 06:13:44.804 INFO kablam!      |
Oct 13 06:13:44.804 INFO kablam! 1070 |             pool.execute(Thunk::of(move || { 1 + 1; }));
Oct 13 06:13:44.804 INFO kablam!      |                                              ^^^^^
Oct 13 06:13:44.804 INFO kablam!      |
Oct 13 06:13:44.804 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Oct 13 06:13:44.804 INFO kablam! 
Oct 13 06:13:44.848 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
Oct 13 06:13:44.852 INFO kablam! su: No module specific data is present
Oct 13 06:13:45.842 INFO running `"docker" "rm" "-f" "141844d6faf25863b57d8a4c73eddaa4340fda4baa39666e250fbeebe011005d"`
Oct 13 06:13:46.156 INFO blam! 141844d6faf25863b57d8a4c73eddaa4340fda4baa39666e250fbeebe011005d