Sep 21 03:59:08.642 INFO checking rust-mpfr-0.1.7 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 03:59:08.642 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 03:59:08.642 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-5/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 03:59:08.781 INFO blam! 37b6fe2ef6346697a2f2536c5742006480c22a30a9e62714a12f4bf846b1c047
Sep 21 03:59:08.782 INFO running `"docker" "start" "-a" "37b6fe2ef6346697a2f2536c5742006480c22a30a9e62714a12f4bf846b1c047"`
Sep 21 03:59:09.922 INFO kablam! usermod: no changes
Sep 21 03:59:09.951 INFO kablam!     Checking rust-gmp v0.3.2
Sep 21 03:59:10.334 INFO kablam!     Checking rust-mpfr v0.1.7 (/source)
Sep 21 03:59:10.763 INFO kablam! warning: unused arithmetic operation which must be used
Sep 21 03:59:10.763 INFO kablam!   --> src/test.rs:42:5
Sep 21 03:59:10.763 INFO kablam!    |
Sep 21 03:59:10.763 INFO kablam! 42 |     x / y;
Sep 21 03:59:10.763 INFO kablam!    |     ^^^^^
Sep 21 03:59:10.763 INFO kablam!    |
Sep 21 03:59:10.763 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Sep 21 03:59:10.764 INFO kablam! 
Sep 21 03:59:10.785 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
Sep 21 03:59:10.788 INFO kablam! su: No module specific data is present
Sep 21 03:59:11.396 INFO running `"docker" "rm" "-f" "37b6fe2ef6346697a2f2536c5742006480c22a30a9e62714a12f4bf846b1c047"`
Sep 21 03:59:11.481 INFO blam! 37b6fe2ef6346697a2f2536c5742006480c22a30a9e62714a12f4bf846b1c047