Sep 20 05:55:34.351 INFO checking bson-0.13.0 against master#1e21c9a297a9fe668d62887a3a6a4add8e717b17 for pr-54352
Sep 20 05:55:34.351 INFO running: cargo +1e21c9a297a9fe668d62887a3a6a4add8e717b17-alt check --frozen --all --all-targets
Sep 20 05:55:34.351 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-54352/master#1e21c9a297a9fe668d62887a3a6a4add8e717b17:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54352/worker-2/master#1e21c9a297a9fe668d62887a3a6a4add8e717b17:/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 +1e21c9a297a9fe668d62887a3a6a4add8e717b17-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 20 05:55:34.474 INFO blam! 5eb3fb902e0710dd7c243da9fff05c44159aec61821fd3c6c71961b1c84f13f6
Sep 20 05:55:34.479 INFO running `"docker" "start" "-a" "5eb3fb902e0710dd7c243da9fff05c44159aec61821fd3c6c71961b1c84f13f6"`
Sep 20 05:55:35.555 INFO kablam! usermod: no changes
Sep 20 05:55:35.648 INFO kablam!     Checking bson v0.13.0 (/source)
Sep 20 05:55:40.234 INFO kablam! warning: unused variable: `tmp`
Sep 20 05:55:40.234 INFO kablam!  --> examples/test.rs:7:9
Sep 20 05:55:40.234 INFO kablam!   |
Sep 20 05:55:40.234 INFO kablam! 7 |     let tmp = bson::to_bson(&map).unwrap();
Sep 20 05:55:40.234 INFO kablam!   |         ^^^ help: consider using `_tmp` instead
Sep 20 05:55:40.234 INFO kablam!   |
Sep 20 05:55:40.234 INFO kablam!   = note: #[warn(unused_variables)] on by default
Sep 20 05:55:40.234 INFO kablam! 
Sep 20 05:55:41.653 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.08s
Sep 20 05:55:41.661 INFO kablam! su: No module specific data is present
Sep 20 05:55:42.490 INFO running `"docker" "rm" "-f" "5eb3fb902e0710dd7c243da9fff05c44159aec61821fd3c6c71961b1c84f13f6"`
Sep 20 05:55:42.549 INFO blam! 5eb3fb902e0710dd7c243da9fff05c44159aec61821fd3c6c71961b1c84f13f6