Sep 10 13:20:48.750 INFO checking pairlock-0.1.0 against master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1 for pr-54090
Sep 10 13:20:48.750 INFO running: cargo +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets
Sep 10 13:20:48.750 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-0/pr-54090/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54090/worker-0/master#f50b7758f4dc85dc1c5e38258adaa94213ac6ed1:/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 +f50b7758f4dc85dc1c5e38258adaa94213ac6ed1-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-m" "2G" "crater"`
Sep 10 13:20:48.944 INFO blam! f2699091e9afee559ab074eee1b94e55045b348504d05f8df3b84502044b841f
Sep 10 13:20:48.944 INFO running `"docker" "start" "-a" "f2699091e9afee559ab074eee1b94e55045b348504d05f8df3b84502044b841f"`
Sep 10 13:20:49.919 INFO kablam! usermod: no changes
Sep 10 13:20:49.952 INFO kablam!     Checking pairlock v0.1.0 (file:///source)
Sep 10 13:20:50.778 INFO kablam! warning: unused import: `black_box`
Sep 10 13:20:50.778 INFO kablam!  --> benches/race_detection.rs:3:21
Sep 10 13:20:50.778 INFO kablam!   |
Sep 10 13:20:50.778 INFO kablam! 3 | use test::{Bencher, black_box};
Sep 10 13:20:50.778 INFO kablam!   |                     ^^^^^^^^^
Sep 10 13:20:50.782 INFO kablam!   |
Sep 10 13:20:50.782 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 10 13:20:50.782 INFO kablam! 
Sep 10 13:20:51.101 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
Sep 10 13:20:51.115 INFO kablam! su: No module specific data is present
Sep 10 13:20:51.742 INFO running `"docker" "rm" "-f" "f2699091e9afee559ab074eee1b94e55045b348504d05f8df3b84502044b841f"`
Sep 10 13:20:51.848 INFO blam! f2699091e9afee559ab074eee1b94e55045b348504d05f8df3b84502044b841f