Aug 30 11:18:30.657 INFO checking merkle-generator-0.2.0 against master#ede55518431154bc761f7b2438cce9078c162700 for pr-53707
Aug 30 11:18:30.657 INFO running: cargo +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets
Aug 30 11:18:30.657 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53707/master#ede55518431154bc761f7b2438cce9078c162700:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-1/master#ede55518431154bc761f7b2438cce9078c162700:/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=500" "-e" "CMD=cargo +ede55518431154bc761f7b2438cce9078c162700-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 11:18:30.859 INFO blam! 1e33c1bad2252f976fcd8b7859d66e97a7eaef862fe0bd95f2e7d82d785e51ce
Aug 30 11:18:30.861 INFO running `"docker" "start" "-a" "1e33c1bad2252f976fcd8b7859d66e97a7eaef862fe0bd95f2e7d82d785e51ce"`
Aug 30 11:18:31.673 INFO kablam!     Checking flat-tree v1.1.0
Aug 30 11:18:32.480 INFO kablam!     Checking merkle-generator v0.2.0 (file:///source)
Aug 30 11:18:33.684 INFO kablam! warning: unused variable: `roots`
Aug 30 11:18:33.684 INFO kablam!    --> src/lib.rs:142:26
Aug 30 11:18:33.684 INFO kablam!     |
Aug 30 11:18:33.684 INFO kablam! 142 |     fn leaf(leaf: &Node, roots: &Vec<Node>) -> Vec<u8> {
Aug 30 11:18:33.684 INFO kablam!     |                          ^^^^^ help: consider using `_roots` instead
Aug 30 11:18:33.684 INFO kablam!     |
Aug 30 11:18:33.684 INFO kablam!     = note: #[warn(unused_variables)] on by default
Aug 30 11:18:33.684 INFO kablam! 
Aug 30 11:18:33.772 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 2.20s
Aug 30 11:18:33.775 INFO kablam! su: No module specific data is present
Aug 30 11:18:34.232 INFO running `"docker" "rm" "-f" "1e33c1bad2252f976fcd8b7859d66e97a7eaef862fe0bd95f2e7d82d785e51ce"`
Aug 30 11:18:34.371 INFO blam! 1e33c1bad2252f976fcd8b7859d66e97a7eaef862fe0bd95f2e7d82d785e51ce