Sep 06 00:51:07.861 INFO checking rust-mpfr-0.1.7 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 00:51:07.861 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 00:51:07.861 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-6/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 00:51:08.028 INFO blam! 4a113b9f0ce46052cdf367751894d3f44dedf908701aa6e8bddf0427ab2da61a
Sep 06 00:51:08.030 INFO running `"docker" "start" "-a" "4a113b9f0ce46052cdf367751894d3f44dedf908701aa6e8bddf0427ab2da61a"`
Sep 06 00:51:08.775 INFO kablam! usermod: no changes
Sep 06 00:51:08.811 INFO kablam!     Checking rust-gmp v0.3.2
Sep 06 00:51:09.246 INFO kablam!     Checking rust-mpfr v0.1.7 (file:///source)
Sep 06 00:51:09.754 INFO kablam! warning: unused arithmetic operation which must be used
Sep 06 00:51:09.754 INFO kablam!   --> src/test.rs:42:5
Sep 06 00:51:09.754 INFO kablam!    |
Sep 06 00:51:09.754 INFO kablam! 42 |     x / y;
Sep 06 00:51:09.754 INFO kablam!    |     ^^^^^
Sep 06 00:51:09.754 INFO kablam!    |
Sep 06 00:51:09.754 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Sep 06 00:51:09.754 INFO kablam! 
Sep 06 00:51:09.780 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
Sep 06 00:51:09.782 INFO kablam! su: No module specific data is present
Sep 06 00:51:10.264 INFO running `"docker" "rm" "-f" "4a113b9f0ce46052cdf367751894d3f44dedf908701aa6e8bddf0427ab2da61a"`
Sep 06 00:51:10.352 INFO blam! 4a113b9f0ce46052cdf367751894d3f44dedf908701aa6e8bddf0427ab2da61a