Aug 02 04:28:18.861 INFO checking merkle-generator-0.2.0 against 1.27.2+tmplazy for lazy_static-1
Aug 02 04:28:18.861 INFO running: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:28:18.861 INFO creating container for: cargo +1.27.2 check --frozen --all --all-targets
Aug 02 04:28:18.861 INFO running `"docker" "create" "-v" "/tmp/crater.6Pr5rnqU5ECV:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/lazy_static-1/worker-0/1.27.2+tmplazy:/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" "-v" "/home/ec2-user/crater/./work/local/cargo-home/git:/cargo-home/git:rw,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +1.27.2 check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "crater"`
Aug 02 04:28:19.104 INFO blam! 583fabe14fdd4780366f748042c0a6be37a863c0075cc296dd2b2b18191b5059
Aug 02 04:28:19.106 INFO running `"docker" "start" "-a" "583fabe14fdd4780366f748042c0a6be37a863c0075cc296dd2b2b18191b5059"`
Aug 02 04:28:20.171 INFO kablam!     Checking flat-tree v1.1.0
Aug 02 04:28:20.767 INFO kablam!     Checking merkle-generator v0.2.0 (file:///source)
Aug 02 04:28:21.565 INFO kablam! warning: unused variable: `roots`
Aug 02 04:28:21.565 INFO kablam!    --> src/lib.rs:142:26
Aug 02 04:28:21.565 INFO kablam!     |
Aug 02 04:28:21.565 INFO kablam! 142 |     fn leaf(leaf: &Node, roots: &Vec<Node>) -> Vec<u8> {
Aug 02 04:28:21.565 INFO kablam!     |                          ^^^^^ help: consider using `_roots` instead
Aug 02 04:28:21.565 INFO kablam!     |
Aug 02 04:28:21.565 INFO kablam!     = note: #[warn(unused_variables)] on by default
Aug 02 04:28:21.565 INFO kablam! 
Aug 02 04:28:21.653 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.56s
Aug 02 04:28:21.668 INFO kablam! su: No module specific data is present
Aug 02 04:28:22.301 INFO running `"docker" "rm" "-f" "583fabe14fdd4780366f748042c0a6be37a863c0075cc296dd2b2b18191b5059"`
Aug 02 04:28:22.460 INFO blam! 583fabe14fdd4780366f748042c0a6be37a863c0075cc296dd2b2b18191b5059