Sep 21 00:31:10.243 INFO checking workerpool-1.1.1 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 00:31:10.243 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 00:31:10.243 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-6/master#f7f4c500b46603386e940f116b469c7adc043a6d:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 00:31:10.464 INFO blam! 3d435fed94848d7ca64a54f3adf5cdd567b8f14ddc9a83d00bec85a0925398a2
Sep 21 00:31:10.466 INFO running `"docker" "start" "-a" "3d435fed94848d7ca64a54f3adf5cdd567b8f14ddc9a83d00bec85a0925398a2"`
Sep 21 00:31:11.535 INFO kablam! usermod: no changes
Sep 21 00:31:11.625 INFO kablam!     Checking workerpool v1.1.1 (/source)
Sep 21 00:31:12.498 INFO kablam! warning: unused arithmetic operation which must be used
Sep 21 00:31:12.498 INFO kablam!     --> src/lib.rs:1070:46
Sep 21 00:31:12.498 INFO kablam!      |
Sep 21 00:31:12.498 INFO kablam! 1070 |             pool.execute(Thunk::of(move || { 1 + 1; }));
Sep 21 00:31:12.498 INFO kablam!      |                                              ^^^^^
Sep 21 00:31:12.498 INFO kablam!      |
Sep 21 00:31:12.498 INFO kablam!      = note: #[warn(unused_must_use)] on by default
Sep 21 00:31:12.498 INFO kablam! 
Sep 21 00:31:12.550 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
Sep 21 00:31:12.557 INFO kablam! su: No module specific data is present
Sep 21 00:31:13.490 INFO running `"docker" "rm" "-f" "3d435fed94848d7ca64a54f3adf5cdd567b8f14ddc9a83d00bec85a0925398a2"`
Sep 21 00:31:13.627 INFO blam! 3d435fed94848d7ca64a54f3adf5cdd567b8f14ddc9a83d00bec85a0925398a2