Sep 21 06:00:11.484 INFO checking pairlock-0.1.0 against try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6 for pr-54394
Sep 21 06:00:11.484 INFO running: cargo +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets
Sep 21 06:00:11.484 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-3/pr-54394/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-3/try#f1a3f05968ed2a674e09b6efa4ad9df90816e2b6:/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 +f1a3f05968ed2a674e09b6efa4ad9df90816e2b6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 21 06:00:11.631 INFO blam! 8f5aab2569b02cda9bb21d0494d98bde65b03dfeb7f2e863e059574f60b3bdff
Sep 21 06:00:11.633 INFO running `"docker" "start" "-a" "8f5aab2569b02cda9bb21d0494d98bde65b03dfeb7f2e863e059574f60b3bdff"`
Sep 21 06:00:12.360 INFO kablam! usermod: no changes
Sep 21 06:00:12.398 INFO kablam!     Checking pairlock v0.1.0 (/source)
Sep 21 06:00:12.994 INFO kablam! warning: unused import: `black_box`
Sep 21 06:00:12.994 INFO kablam!  --> benches/race_detection.rs:3:21
Sep 21 06:00:12.994 INFO kablam!   |
Sep 21 06:00:12.994 INFO kablam! 3 | use test::{Bencher, black_box};
Sep 21 06:00:12.994 INFO kablam!   |                     ^^^^^^^^^
Sep 21 06:00:12.994 INFO kablam!   |
Sep 21 06:00:12.994 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 21 06:00:12.994 INFO kablam! 
Sep 21 06:00:13.338 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
Sep 21 06:00:13.343 INFO kablam! su: No module specific data is present
Sep 21 06:00:13.850 INFO running `"docker" "rm" "-f" "8f5aab2569b02cda9bb21d0494d98bde65b03dfeb7f2e863e059574f60b3bdff"`
Sep 21 06:00:13.946 INFO blam! 8f5aab2569b02cda9bb21d0494d98bde65b03dfeb7f2e863e059574f60b3bdff