Sep 21 12:45:59.771 INFO checking bson-0.13.0 against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 21 12:45:59.771 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 21 12:45:59.771 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-7/master#f7f4c500b46603386e940f116b469c7adc043a6d:/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 +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 12:46:00.039 INFO blam! 7eb9414b12d6154f3928a04fb6b13d98cb5574361487272a611a74db69c73c40
Sep 21 12:46:00.041 INFO running `"docker" "start" "-a" "7eb9414b12d6154f3928a04fb6b13d98cb5574361487272a611a74db69c73c40"`
Sep 21 12:46:01.100 INFO kablam! usermod: no changes
Sep 21 12:46:01.310 INFO kablam!     Checking bson v0.13.0 (/source)
Sep 21 12:46:05.433 INFO kablam! warning: unused variable: `tmp`
Sep 21 12:46:05.433 INFO kablam!  --> examples/test.rs:7:9
Sep 21 12:46:05.433 INFO kablam!   |
Sep 21 12:46:05.433 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap();
Sep 21 12:46:05.433 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 21 12:46:05.433 INFO kablam!   |
Sep 21 12:46:05.433 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 21 12:46:05.433 INFO kablam! 
Sep 21 12:46:06.695 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.56s
Sep 21 12:46:06.704 INFO kablam! su: No module specific data is present
Sep 21 12:46:07.578 INFO running `"docker" "rm" "-f" "7eb9414b12d6154f3928a04fb6b13d98cb5574361487272a611a74db69c73c40"`
Sep 21 12:46:07.649 INFO blam! 7eb9414b12d6154f3928a04fb6b13d98cb5574361487272a611a74db69c73c40