Sep 04 22:42:32.865 INFO checking bson-0.13.0 against master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c for pr-53893
Sep 04 22:42:32.865 INFO running: cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets
Sep 04 22:42:32.866 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-53893/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53893/worker-3/master#28bcffead74d5e17c6cb1f7de432e37f93a6b50c:/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=500" "-e" "CMD=cargo +28bcffead74d5e17c6cb1f7de432e37f93a6b50c-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 04 22:42:33.045 INFO blam! d8f1c73605fc0714eca9c61e1695d522e25591f8a0ca17fefa995bdc19be9c6a
Sep 04 22:42:33.048 INFO running `"docker" "start" "-a" "d8f1c73605fc0714eca9c61e1695d522e25591f8a0ca17fefa995bdc19be9c6a"`
Sep 04 22:42:33.828 INFO kablam!     Checking bson v0.13.0 (file:///source)
Sep 04 22:42:42.609 INFO kablam! warning: unused variable: `tmp`
Sep 04 22:42:42.609 INFO kablam!  --> examples/test.rs:7:9
Sep 04 22:42:42.609 INFO kablam!   |
Sep 04 22:42:42.609 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap();
Sep 04 22:42:42.609 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 04 22:42:42.618 INFO kablam!   |
Sep 04 22:42:42.619 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 04 22:42:42.619 INFO kablam! 
Sep 04 22:42:44.871 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 11.15s
Sep 04 22:42:44.902 INFO kablam! su: No module specific data is present
Sep 04 22:42:45.414 INFO running `"docker" "rm" "-f" "d8f1c73605fc0714eca9c61e1695d522e25591f8a0ca17fefa995bdc19be9c6a"`
Sep 04 22:42:45.571 INFO blam! d8f1c73605fc0714eca9c61e1695d522e25591f8a0ca17fefa995bdc19be9c6a