Aug 30 11:18:26.882 INFO checking merkle-generator-0.2.0 against try#2d477f9981361618ac78253c28051a66b6cea125 for pr-53707
Aug 30 11:18:26.882 INFO running: cargo +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets
Aug 30 11:18:26.882 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-1/pr-53707/try#2d477f9981361618ac78253c28051a66b6cea125:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53707/worker-1/try#2d477f9981361618ac78253c28051a66b6cea125:/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 +2d477f9981361618ac78253c28051a66b6cea125-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Aug 30 11:18:27.103 INFO blam! cb7c7c611987b52b32feb2be6847c12be54834663f4daca7965e315f643fc37a
Aug 30 11:18:27.105 INFO running `"docker" "start" "-a" "cb7c7c611987b52b32feb2be6847c12be54834663f4daca7965e315f643fc37a"`
Aug 30 11:18:27.896 INFO kablam!     Checking flat-tree v1.1.0
Aug 30 11:18:28.685 INFO kablam!     Checking merkle-generator v0.2.0 (file:///source)
Aug 30 11:18:29.870 INFO kablam! warning: unused variable: `roots`
Aug 30 11:18:29.870 INFO kablam!    --> src/lib.rs:142:26
Aug 30 11:18:29.870 INFO kablam!     |
Aug 30 11:18:29.870 INFO kablam! 142 |     fn leaf(leaf: &Node, roots: &Vec<Node>) -> Vec<u8> {
Aug 30 11:18:29.870 INFO kablam!     |                          ^^^^^ help: consider using `_roots` instead
Aug 30 11:18:29.870 INFO kablam!     |
Aug 30 11:18:29.870 INFO kablam!     = note: #[warn(unused_variables)] on by default
Aug 30 11:18:29.870 INFO kablam! 
Aug 30 11:18:29.956 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 2.13s
Aug 30 11:18:29.959 INFO kablam! su: No module specific data is present
Aug 30 11:18:30.479 INFO running `"docker" "rm" "-f" "cb7c7c611987b52b32feb2be6847c12be54834663f4daca7965e315f643fc37a"`
Aug 30 11:18:30.614 INFO blam! cb7c7c611987b52b32feb2be6847c12be54834663f4daca7965e315f643fc37a