Sep 17 18:14:57.943 INFO checking rust-mpfr-0.1.7 against master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690 for pr-54033
Sep 17 18:14:57.943 INFO running: cargo +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets
Sep 17 18:14:57.943 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54033/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-7/master#cb6d2dfa8923902b0992a1522dc4a45a9d3ba690:/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 +cb6d2dfa8923902b0992a1522dc4a45a9d3ba690-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 17 18:14:58.121 INFO blam! e4c42d2e19f0f63890b823d7595dc58055b84512bef7d1cfb72bde1497aa5ee9
Sep 17 18:14:58.123 INFO running `"docker" "start" "-a" "e4c42d2e19f0f63890b823d7595dc58055b84512bef7d1cfb72bde1497aa5ee9"`
Sep 17 18:14:59.217 INFO kablam! usermod: no changes
Sep 17 18:14:59.262 INFO kablam!     Checking rust-mpfr v0.1.7 (/source)
Sep 17 18:14:59.895 INFO kablam! warning: unused arithmetic operation which must be used
Sep 17 18:14:59.895 INFO kablam!   --> src/test.rs:42:5
Sep 17 18:14:59.895 INFO kablam!    |
Sep 17 18:14:59.895 INFO kablam! 42 |     x / y;
Sep 17 18:14:59.895 INFO kablam!    |     ^^^^^
Sep 17 18:14:59.895 INFO kablam!    |
Sep 17 18:14:59.895 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Sep 17 18:14:59.895 INFO kablam! 
Sep 17 18:14:59.928 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
Sep 17 18:14:59.931 INFO kablam! su: No module specific data is present
Sep 17 18:15:00.939 INFO running `"docker" "rm" "-f" "e4c42d2e19f0f63890b823d7595dc58055b84512bef7d1cfb72bde1497aa5ee9"`
Sep 17 18:15:01.039 INFO blam! e4c42d2e19f0f63890b823d7595dc58055b84512bef7d1cfb72bde1497aa5ee9