Sep 06 09:19:57.665 INFO checking bson-0.13.0 against master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6 for pr-53854
Sep 06 09:19:57.665 INFO running: cargo +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets
Sep 06 09:19:57.665 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53854/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-3/master#1c2e17f4e3a2070a7f703f51e29c1c388ef703b6:/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 +1c2e17f4e3a2070a7f703f51e29c1c388ef703b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 09:19:57.791 INFO blam! 6e3e0e97eedfc988450cbbeea300ac05f0d8e5927428f798252679c204e1413c
Sep 06 09:19:57.794 INFO running `"docker" "start" "-a" "6e3e0e97eedfc988450cbbeea300ac05f0d8e5927428f798252679c204e1413c"`
Sep 06 09:19:58.756 INFO kablam! usermod: no changes
Sep 06 09:19:58.843 INFO kablam!     Checking bson v0.13.0 (file:///source)
Sep 06 09:20:02.012 INFO kablam! warning: unused variable: `tmp`
Sep 06 09:20:02.012 INFO kablam!  --> examples/test.rs:7:9
Sep 06 09:20:02.012 INFO kablam!   |
Sep 06 09:20:02.012 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap();
Sep 06 09:20:02.012 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 06 09:20:02.012 INFO kablam!   |
Sep 06 09:20:02.012 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 06 09:20:02.012 INFO kablam! 
Sep 06 09:20:03.654 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 4.88s
Sep 06 09:20:03.665 INFO kablam! su: No module specific data is present
Sep 06 09:20:04.170 INFO running `"docker" "rm" "-f" "6e3e0e97eedfc988450cbbeea300ac05f0d8e5927428f798252679c204e1413c"`
Sep 06 09:20:04.252 INFO blam! 6e3e0e97eedfc988450cbbeea300ac05f0d8e5927428f798252679c204e1413c