Sep 14 12:05:09.686 INFO checking pairlock-0.1.0 against try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0 for pr-53578-1
Sep 14 12:05:09.686 INFO running: cargo +87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0-alt check --frozen --all --all-targets
Sep 14 12:05:09.686 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53578-1/try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53578-1/worker-2/try#87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0:/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 +87b8e7411c4f1267d0cac0d63fa9c21c943e2ea0-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 14 12:05:09.830 INFO blam! 62d1088b04b36f17477698a558fbd76de7e4b0f767357e72c2819d809ec82ed9
Sep 14 12:05:09.835 INFO running `"docker" "start" "-a" "62d1088b04b36f17477698a558fbd76de7e4b0f767357e72c2819d809ec82ed9"`
Sep 14 12:05:10.840 INFO kablam! usermod: no changes
Sep 14 12:05:10.874 INFO kablam!     Checking pairlock v0.1.0 (file:///source)
Sep 14 12:05:11.514 INFO kablam! warning: unused import: `black_box`
Sep 14 12:05:11.515 INFO kablam!  --> benches/race_detection.rs:3:21
Sep 14 12:05:11.515 INFO kablam!   |
Sep 14 12:05:11.515 INFO kablam! 3 | use test::{Bencher, black_box};
Sep 14 12:05:11.515 INFO kablam!   |                     ^^^^^^^^^
Sep 14 12:05:11.515 INFO kablam!   |
Sep 14 12:05:11.515 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 14 12:05:11.515 INFO kablam! 
Sep 14 12:05:11.758 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
Sep 14 12:05:11.761 INFO kablam! su: No module specific data is present
Sep 14 12:05:12.252 INFO running `"docker" "rm" "-f" "62d1088b04b36f17477698a558fbd76de7e4b0f767357e72c2819d809ec82ed9"`
Sep 14 12:05:12.395 INFO blam! 62d1088b04b36f17477698a558fbd76de7e4b0f767357e72c2819d809ec82ed9