Oct 13 07:28:13.874 INFO checking threading-0.1.2 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 07:28:13.876 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-2/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-2/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 07:28:14.384 INFO blam! 765a1fe10df6f959f351beb1ac4460bfd8b968967ca75aba304b4b7deafad049
Oct 13 07:28:14.388 INFO running `"docker" "start" "-a" "765a1fe10df6f959f351beb1ac4460bfd8b968967ca75aba304b4b7deafad049"`
Oct 13 07:28:16.119 INFO kablam! usermod: no changes
Oct 13 07:28:16.176 INFO kablam!     Checking threading v0.1.2 (/source)
Oct 13 07:28:17.554 INFO kablam! warning: unused arithmetic operation which must be used
Oct 13 07:28:17.554 INFO kablam!    --> src/lib.rs:165:13
Oct 13 07:28:17.554 INFO kablam!     |
Oct 13 07:28:17.554 INFO kablam! 165 |             i * i;
Oct 13 07:28:17.554 INFO kablam!     |             ^^^^^
Oct 13 07:28:17.554 INFO kablam!     |
Oct 13 07:28:17.554 INFO kablam!     = note: #[warn(unused_must_use)] on by default
Oct 13 07:28:17.554 INFO kablam! 
Oct 13 07:28:17.577 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
Oct 13 07:28:17.583 INFO kablam! su: No module specific data is present
Oct 13 07:28:18.176 INFO running `"docker" "rm" "-f" "765a1fe10df6f959f351beb1ac4460bfd8b968967ca75aba304b4b7deafad049"`
Oct 13 07:28:18.453 INFO blam! 765a1fe10df6f959f351beb1ac4460bfd8b968967ca75aba304b4b7deafad049