Sep 06 07:58:08.749 INFO checking difference-2.0.0 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 07:58:08.749 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 07:58:08.749 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-4/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 07:58:09.007 INFO blam! 9ce5e29f4af319e9efd22bb0ab9982233c888f01a4058298fbc6a54e970e562d
Sep 06 07:58:09.008 INFO running `"docker" "start" "-a" "9ce5e29f4af319e9efd22bb0ab9982233c888f01a4058298fbc6a54e970e562d"`
Sep 06 07:58:10.966 INFO kablam! usermod: no changes
Sep 06 07:58:11.089 INFO kablam!     Checking difference v2.0.0 (file:///source)
Sep 06 07:58:12.375 INFO kablam! warning: unknown lint: `needless_pass_by_value`
Sep 06 07:58:12.375 INFO kablam!    --> tests/quickcheck.rs:103:9
Sep 06 07:58:12.375 INFO kablam!     |
Sep 06 07:58:12.375 INFO kablam! 103 | #[allow(needless_pass_by_value)]
Sep 06 07:58:12.375 INFO kablam!     |         ^^^^^^^^^^^^^^^^^^^^^^
Sep 06 07:58:12.375 INFO kablam!     |
Sep 06 07:58:12.375 INFO kablam!     = note: #[warn(unknown_lints)] on by default
Sep 06 07:58:12.376 INFO kablam! 
Sep 06 07:58:14.406 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 3.41s
Sep 06 07:58:14.411 INFO kablam! su: No module specific data is present
Sep 06 07:58:16.145 INFO running `"docker" "rm" "-f" "9ce5e29f4af319e9efd22bb0ab9982233c888f01a4058298fbc6a54e970e562d"`
Sep 06 07:58:16.256 INFO blam! 9ce5e29f4af319e9efd22bb0ab9982233c888f01a4058298fbc6a54e970e562d