Oct 13 07:28:08.959 INFO checking threadpool-1.7.1 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 07:28:08.961 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-1/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-1/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 07:28:09.416 INFO blam! 5a92800ec952134fbc3599405cb94a5395fd5f5f79d8120b07b986be096c133a
Oct 13 07:28:09.418 INFO running `"docker" "start" "-a" "5a92800ec952134fbc3599405cb94a5395fd5f5f79d8120b07b986be096c133a"`
Oct 13 07:28:11.095 INFO kablam! usermod: no changes
Oct 13 07:28:11.153 INFO kablam!     Checking threadpool v1.7.1 (/source)
Oct 13 07:28:12.787 INFO kablam! warning: unused arithmetic operation which must be used
Oct 13 07:28:12.787 INFO kablam!    --> src/lib.rs:815:36
Oct 13 07:28:12.787 INFO kablam!     |
Oct 13 07:28:12.787 INFO kablam! 815 |             pool.execute(move || { 1 + 1; });
Oct 13 07:28:12.787 INFO kablam!     |                                    ^^^^^
Oct 13 07:28:12.788 INFO kablam!     |
Oct 13 07:28:12.788 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Oct 13 07:28:12.788 INFO kablam! 
Oct 13 07:28:12.861 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.75s
Oct 13 07:28:12.864 INFO kablam! su: No module specific data is present
Oct 13 07:28:13.832 INFO running `"docker" "rm" "-f" "5a92800ec952134fbc3599405cb94a5395fd5f5f79d8120b07b986be096c133a"`
Oct 13 07:28:14.103 INFO blam! 5a92800ec952134fbc3599405cb94a5395fd5f5f79d8120b07b986be096c133a