Sep 06 09:19:56.741 INFO checking bson-0.13.0 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 09:19:56.741 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 09:19:56.741 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-6/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 09:19:56.914 INFO blam! 77b5ee7fe66783a9829009d1037dda4d43f73f314258900299e38edba4d384d6
Sep 06 09:19:56.916 INFO running `"docker" "start" "-a" "77b5ee7fe66783a9829009d1037dda4d43f73f314258900299e38edba4d384d6"`
Sep 06 09:19:58.142 INFO kablam! usermod: no changes
Sep 06 09:19:58.204 INFO kablam!     Checking bson v0.13.0 (file:///source)
Sep 06 09:20:01.178 INFO kablam! warning: unused variable: `tmp`
Sep 06 09:20:01.178 INFO kablam!  --> examples/test.rs:7:9
Sep 06 09:20:01.178 INFO kablam!   |
Sep 06 09:20:01.178 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap();
Sep 06 09:20:01.178 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 06 09:20:01.178 INFO kablam!   |
Sep 06 09:20:01.178 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 06 09:20:01.178 INFO kablam! 
Sep 06 09:20:03.166 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.01s
Sep 06 09:20:03.192 INFO kablam! su: No module specific data is present
Sep 06 09:20:03.743 INFO running `"docker" "rm" "-f" "77b5ee7fe66783a9829009d1037dda4d43f73f314258900299e38edba4d384d6"`
Sep 06 09:20:03.824 INFO blam! 77b5ee7fe66783a9829009d1037dda4d43f73f314258900299e38edba4d384d6