Oct 13 12:07:32.406 INFO checking message_verifier-1.1.0 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 12:07:32.406 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-6/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-6/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/source:ro,Z" "-v" "/mnt/big/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +4021bd0b3c5815b087d6db10ce461e7e4854ade7-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Oct 13 12:07:32.677 INFO blam! 4ad74fbfa635774478a897132e8083ac015eb3ecf96ecc50fe0c2cf488b7be05
Oct 13 12:07:32.682 INFO running `"docker" "start" "-a" "4ad74fbfa635774478a897132e8083ac015eb3ecf96ecc50fe0c2cf488b7be05"`
Oct 13 12:07:33.694 INFO kablam! usermod: no changes
Oct 13 12:07:33.774 INFO kablam!     Checking message_verifier v1.1.0 (/source)
Oct 13 12:07:35.644 INFO kablam! warning: unused import: `std::str`
Oct 13 12:07:35.645 INFO kablam!    --> src/lib.rs:409:9
Oct 13 12:07:35.645 INFO kablam!     |
Oct 13 12:07:35.645 INFO kablam! 409 |     use std::str;
Oct 13 12:07:35.645 INFO kablam!     |         ^^^^^^^^
Oct 13 12:07:35.652 INFO kablam!     |
Oct 13 12:07:35.653 INFO kablam!     = note: #[warn(unused_imports)] on by default
Oct 13 12:07:35.653 INFO kablam! 
Oct 13 12:07:40.046 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 6.33s
Oct 13 12:07:40.051 INFO kablam! su: No module specific data is present
Oct 13 12:07:40.860 INFO running `"docker" "rm" "-f" "4ad74fbfa635774478a897132e8083ac015eb3ecf96ecc50fe0c2cf488b7be05"`
Oct 13 12:07:41.116 INFO blam! 4ad74fbfa635774478a897132e8083ac015eb3ecf96ecc50fe0c2cf488b7be05