Sep 10 21:54:33.660 INFO checking bson-0.10.0 against try#3a2610c2a16575649896925631bf8cec4f4b1961 for pr-54090
Sep 10 21:54:33.660 INFO running: cargo +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets
Sep 10 21:54:33.660 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-7/pr-54090/try#3a2610c2a16575649896925631bf8cec4f4b1961:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-7/try#3a2610c2a16575649896925631bf8cec4f4b1961:/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 +3a2610c2a16575649896925631bf8cec4f4b1961-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 21:54:33.882 INFO blam! b2dcc98493a5b7793d56b89fe6fac39dbb161a68c74b15408fa2078dd229139f
Sep 10 21:54:33.884 INFO running `"docker" "start" "-a" "b2dcc98493a5b7793d56b89fe6fac39dbb161a68c74b15408fa2078dd229139f"`
Sep 10 21:54:34.743 INFO kablam! usermod: no changes
Sep 10 21:54:34.853 INFO kablam!     Checking bson v0.10.0 (file:///source)
Sep 10 21:54:38.498 INFO kablam! warning: unused variable: `tmp`
Sep 10 21:54:38.498 INFO kablam!  --> examples/test.rs:7:9
Sep 10 21:54:38.498 INFO kablam!   |
Sep 10 21:54:38.498 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap(); 
Sep 10 21:54:38.498 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 10 21:54:38.498 INFO kablam!   |
Sep 10 21:54:38.498 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 10 21:54:38.498 INFO kablam! 
Sep 10 21:54:39.326 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 4.57s
Sep 10 21:54:39.358 INFO kablam! su: No module specific data is present
Sep 10 21:54:40.212 INFO running `"docker" "rm" "-f" "b2dcc98493a5b7793d56b89fe6fac39dbb161a68c74b15408fa2078dd229139f"`
Sep 10 21:54:40.294 INFO blam! b2dcc98493a5b7793d56b89fe6fac39dbb161a68c74b15408fa2078dd229139f