Sep 18 03:04:37.324 INFO checking bson-0.13.0 against try#cfeeefe83c83bceb55d60d7e2be173db7597ed50 for pr-54033
Sep 18 03:04:37.324 INFO running: cargo +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets
Sep 18 03:04:37.324 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54033/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54033/worker-4/try#cfeeefe83c83bceb55d60d7e2be173db7597ed50:/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 +cfeeefe83c83bceb55d60d7e2be173db7597ed50-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 18 03:04:37.453 INFO blam! f62f4326b1914d73920a1eaf7257c02c9aa84f6d4cc7f2850703917df3d77f49
Sep 18 03:04:37.456 INFO running `"docker" "start" "-a" "f62f4326b1914d73920a1eaf7257c02c9aa84f6d4cc7f2850703917df3d77f49"`
Sep 18 03:04:37.992 INFO kablam! usermod: no changes
Sep 18 03:04:38.091 INFO kablam!     Checking bson v0.13.0 (/source)
Sep 18 03:04:42.290 INFO kablam! warning: unused variable: `tmp`
Sep 18 03:04:42.291 INFO kablam!  --> examples/test.rs:7:9
Sep 18 03:04:42.291 INFO kablam!   |
Sep 18 03:04:42.291 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap();
Sep 18 03:04:42.291 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 18 03:04:42.291 INFO kablam!   |
Sep 18 03:04:42.291 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 18 03:04:42.291 INFO kablam! 
Sep 18 03:04:44.314 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.30s
Sep 18 03:04:44.329 INFO kablam! su: No module specific data is present
Sep 18 03:04:45.197 INFO running `"docker" "rm" "-f" "f62f4326b1914d73920a1eaf7257c02c9aa84f6d4cc7f2850703917df3d77f49"`
Sep 18 03:04:45.256 INFO blam! f62f4326b1914d73920a1eaf7257c02c9aa84f6d4cc7f2850703917df3d77f49