Sep 01 08:12:26.337 INFO checking rust-mpfr-0.1.7 against master#1114ab684fbad001c4e580326d8eb4d8c4e917d3 for pr-53831
Sep 01 08:12:26.337 INFO running: cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets
Sep 01 08:12:26.337 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53831/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-2/master#1114ab684fbad001c4e580326d8eb4d8c4e917d3:/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=500" "-e" "CMD=cargo +1114ab684fbad001c4e580326d8eb4d8c4e917d3-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 08:12:26.547 INFO blam! 5b10d452d5c1de4aa5fc0a7c1f3f2606e9b673499709921d151c66a4ebdd680c
Sep 01 08:12:26.548 INFO running `"docker" "start" "-a" "5b10d452d5c1de4aa5fc0a7c1f3f2606e9b673499709921d151c66a4ebdd680c"`
Sep 01 08:12:27.295 INFO kablam!     Checking rust-mpfr v0.1.7 (file:///source)
Sep 01 08:12:28.216 INFO kablam! warning: unused arithmetic operation which must be used
Sep 01 08:12:28.216 INFO kablam!   --> src/test.rs:42:5
Sep 01 08:12:28.216 INFO kablam!    |
Sep 01 08:12:28.216 INFO kablam! 42 |     x / y;
Sep 01 08:12:28.217 INFO kablam!    |     ^^^^^
Sep 01 08:12:28.217 INFO kablam!    |
Sep 01 08:12:28.217 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Sep 01 08:12:28.217 INFO kablam! 
Sep 01 08:12:28.235 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
Sep 01 08:12:28.238 INFO kablam! su: No module specific data is present
Sep 01 08:12:28.645 INFO running `"docker" "rm" "-f" "5b10d452d5c1de4aa5fc0a7c1f3f2606e9b673499709921d151c66a4ebdd680c"`
Sep 01 08:12:28.734 INFO blam! 5b10d452d5c1de4aa5fc0a7c1f3f2606e9b673499709921d151c66a4ebdd680c