Sep 06 03:51:48.612 INFO checking message_verifier-1.1.0 against try#51ff957df5095d92d1d3d4682207ee8b7ad408a8 for pr-53854
Sep 06 03:51:48.612 INFO running: cargo +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets
Sep 06 03:51:48.612 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-5/pr-53854/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53854/worker-5/try#51ff957df5095d92d1d3d4682207ee8b7ad408a8:/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 +51ff957df5095d92d1d3d4682207ee8b7ad408a8-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 06 03:51:48.821 INFO blam! db9e70a4e15a9b372153fd19763acd1084c9d6eab04420b3b67fa71101ae513d
Sep 06 03:51:48.825 INFO running `"docker" "start" "-a" "db9e70a4e15a9b372153fd19763acd1084c9d6eab04420b3b67fa71101ae513d"`
Sep 06 03:51:49.581 INFO kablam! usermod: no changes
Sep 06 03:51:49.654 INFO kablam!     Checking message_verifier v1.1.0 (file:///source)
Sep 06 03:51:50.231 INFO kablam! warning: unused import: `std::str`
Sep 06 03:51:50.231 INFO kablam!    --> src/lib.rs:409:9
Sep 06 03:51:50.231 INFO kablam!     |
Sep 06 03:51:50.231 INFO kablam! 409 |     use std::str;
Sep 06 03:51:50.231 INFO kablam!     |         ^^^^^^^^
Sep 06 03:51:50.231 INFO kablam!     |
Sep 06 03:51:50.232 INFO kablam!     = note: #[warn(unused_imports)] on by default
Sep 06 03:51:50.232 INFO kablam! 
Sep 06 03:51:51.230 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
Sep 06 03:51:51.234 INFO kablam! su: No module specific data is present
Sep 06 03:51:51.748 INFO running `"docker" "rm" "-f" "db9e70a4e15a9b372153fd19763acd1084c9d6eab04420b3b67fa71101ae513d"`
Sep 06 03:51:51.852 INFO blam! db9e70a4e15a9b372153fd19763acd1084c9d6eab04420b3b67fa71101ae513d