Sep 14 19:01:30.390 INFO checking bson-0.10.0 against master#90d36fb5905bbe5004f5b465ea14b53d10dae260 for pr-53578-1
Sep 14 19:01:30.390 INFO running: cargo +90d36fb5905bbe5004f5b465ea14b53d10dae260-alt check --frozen --all --all-targets
Sep 14 19:01:30.391 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-53578-1/master#90d36fb5905bbe5004f5b465ea14b53d10dae260:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578-1/worker-4/master#90d36fb5905bbe5004f5b465ea14b53d10dae260:/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 +90d36fb5905bbe5004f5b465ea14b53d10dae260-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 14 19:01:30.563 INFO blam! 7f7e6098fedca9681f2858b7fa0cc1bd25597e2cb58336ac5615390cc30fcd56
Sep 14 19:01:30.567 INFO running `"docker" "start" "-a" "7f7e6098fedca9681f2858b7fa0cc1bd25597e2cb58336ac5615390cc30fcd56"`
Sep 14 19:01:31.811 INFO kablam! usermod: no changes
Sep 14 19:01:32.035 INFO kablam!     Checking bson v0.10.0 (file:///source)
Sep 14 19:01:36.337 INFO kablam! warning: unused variable: `tmp`
Sep 14 19:01:36.337 INFO kablam!  --> examples/test.rs:7:9
Sep 14 19:01:36.337 INFO kablam!   |
Sep 14 19:01:36.337 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap(); 
Sep 14 19:01:36.337 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 14 19:01:36.337 INFO kablam!   |
Sep 14 19:01:36.337 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 14 19:01:36.337 INFO kablam! 
Sep 14 19:01:36.985 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 5.15s
Sep 14 19:01:36.996 INFO kablam! su: No module specific data is present
Sep 14 19:01:37.751 INFO running `"docker" "rm" "-f" "7f7e6098fedca9681f2858b7fa0cc1bd25597e2cb58336ac5615390cc30fcd56"`
Sep 14 19:01:37.836 INFO blam! 7f7e6098fedca9681f2858b7fa0cc1bd25597e2cb58336ac5615390cc30fcd56