Sep 19 19:12:00.324 INFO checking rust-mpfr-0.1.7 against master#ff6422d7a392acfc8af28994d65af2bbaecea4f6 for pr-54346
Sep 19 19:12:00.324 INFO running: cargo +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets
Sep 19 19:12:00.324 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54346/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-6/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/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 +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 19:12:00.507 INFO blam! a259eb7ddfdc58e4e0748ffccc663798c37870fc6d1b3a8f7f59126381e8455a
Sep 19 19:12:00.510 INFO running `"docker" "start" "-a" "a259eb7ddfdc58e4e0748ffccc663798c37870fc6d1b3a8f7f59126381e8455a"`
Sep 19 19:12:01.615 INFO kablam! usermod: no changes
Sep 19 19:12:01.646 INFO kablam!     Checking rust-mpfr v0.1.7 (/source)
Sep 19 19:12:02.099 INFO kablam! warning: unused arithmetic operation which must be used
Sep 19 19:12:02.099 INFO kablam!   --> src/test.rs:42:5
Sep 19 19:12:02.099 INFO kablam!    |
Sep 19 19:12:02.099 INFO kablam! 42 |     x / y;
Sep 19 19:12:02.099 INFO kablam!    |     ^^^^^
Sep 19 19:12:02.099 INFO kablam!    |
Sep 19 19:12:02.099 INFO kablam!    = note: #[warn(unused_must_use)] on by default
Sep 19 19:12:02.099 INFO kablam! 
Sep 19 19:12:02.121 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
Sep 19 19:12:02.124 INFO kablam! su: No module specific data is present
Sep 19 19:12:02.572 INFO running `"docker" "rm" "-f" "a259eb7ddfdc58e4e0748ffccc663798c37870fc6d1b3a8f7f59126381e8455a"`
Sep 19 19:12:02.662 INFO blam! a259eb7ddfdc58e4e0748ffccc663798c37870fc6d1b3a8f7f59126381e8455a