Oct 12 14:16:25.167 INFO checking sbwtw/RBTree against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 14:16:25.169 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-4/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-4/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 12 14:16:25.612 INFO blam! 6d1a976be4d6cbfb40c3605e8da56953c4ee0ddd6f99e6deac2639a68c682a06
Oct 12 14:16:25.613 INFO running `"docker" "start" "-a" "6d1a976be4d6cbfb40c3605e8da56953c4ee0ddd6f99e6deac2639a68c682a06"`
Oct 12 14:16:27.680 INFO kablam! usermod: no changes
Oct 12 14:16:27.744 INFO kablam!     Checking rbtree v0.1.0 (/source)
Oct 12 14:16:28.429 INFO kablam! warning: variant is never constructed: `Red`
Oct 12 14:16:28.429 INFO kablam!  --> src/main.rs:7:5
Oct 12 14:16:28.429 INFO kablam!   |
Oct 12 14:16:28.429 INFO kablam! 7 |     Red,
Oct 12 14:16:28.429 INFO kablam!   |     ^^^
Oct 12 14:16:28.429 INFO kablam!   |
Oct 12 14:16:28.429 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 12 14:16:28.429 INFO kablam! 
Oct 12 14:16:28.429 INFO kablam! warning: enum is never used: `Direction`
Oct 12 14:16:28.429 INFO kablam!   --> src/main.rs:12:1
Oct 12 14:16:28.429 INFO kablam!    |
Oct 12 14:16:28.429 INFO kablam! 12 | enum Direction {
Oct 12 14:16:28.429 INFO kablam!    | ^^^^^^^^^^^^^^
Oct 12 14:16:28.429 INFO kablam! 
Oct 12 14:16:28.429 INFO kablam! warning: function is never used: `ensure_root_black`
Oct 12 14:16:28.429 INFO kablam!   --> src/main.rs:79:1
Oct 12 14:16:28.429 INFO kablam!    |
Oct 12 14:16:28.429 INFO kablam! 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Oct 12 14:16:28.429 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:16:28.429 INFO kablam! 
Oct 12 14:16:28.429 INFO kablam! warning: function is never used: `insert_n`
Oct 12 14:16:28.429 INFO kablam!   --> src/main.rs:85:1
Oct 12 14:16:28.429 INFO kablam!    |
Oct 12 14:16:28.429 INFO kablam! 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Oct 12 14:16:28.429 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:16:28.429 INFO kablam! 
Oct 12 14:16:28.429 INFO kablam! warning: method is never used: `set_color`
Oct 12 14:16:28.429 INFO kablam!    --> src/main.rs:120:5
Oct 12 14:16:28.429 INFO kablam!     |
Oct 12 14:16:28.429 INFO kablam! 120 |     fn set_color(&mut self, color: RBColor) {
Oct 12 14:16:28.429 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:16:28.429 INFO kablam! 
Oct 12 14:16:28.564 INFO kablam! warning: variant is never constructed: `Red`
Oct 12 14:16:28.564 INFO kablam!  --> src/main.rs:7:5
Oct 12 14:16:28.564 INFO kablam!   |
Oct 12 14:16:28.564 INFO kablam! 7 |     Red,
Oct 12 14:16:28.564 INFO kablam!   |     ^^^
Oct 12 14:16:28.564 INFO kablam!   |
Oct 12 14:16:28.564 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 12 14:16:28.564 INFO kablam! 
Oct 12 14:16:28.564 INFO kablam! warning: enum is never used: `Direction`
Oct 12 14:16:28.564 INFO kablam!   --> src/main.rs:12:1
Oct 12 14:16:28.564 INFO kablam!    |
Oct 12 14:16:28.564 INFO kablam! 12 | enum Direction {
Oct 12 14:16:28.564 INFO kablam!    | ^^^^^^^^^^^^^^
Oct 12 14:16:28.564 INFO kablam! 
Oct 12 14:16:28.564 INFO kablam! warning: function is never used: `ensure_root_black`
Oct 12 14:16:28.564 INFO kablam!   --> src/main.rs:79:1
Oct 12 14:16:28.565 INFO kablam!    |
Oct 12 14:16:28.565 INFO kablam! 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Oct 12 14:16:28.565 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:16:28.565 INFO kablam! 
Oct 12 14:16:28.565 INFO kablam! warning: function is never used: `insert_n`
Oct 12 14:16:28.565 INFO kablam!   --> src/main.rs:85:1
Oct 12 14:16:28.565 INFO kablam!    |
Oct 12 14:16:28.565 INFO kablam! 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Oct 12 14:16:28.565 INFO kablam!    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:16:28.565 INFO kablam! 
Oct 12 14:16:28.565 INFO kablam! warning: method is never used: `set_color`
Oct 12 14:16:28.565 INFO kablam!    --> src/main.rs:120:5
Oct 12 14:16:28.565 INFO kablam!     |
Oct 12 14:16:28.565 INFO kablam! 120 |     fn set_color(&mut self, color: RBColor) {
Oct 12 14:16:28.565 INFO kablam!     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 14:16:28.565 INFO kablam! 
Oct 12 14:16:28.616 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
Oct 12 14:16:28.616 INFO kablam! su: No module specific data is present
Oct 12 14:16:29.358 INFO running `"docker" "rm" "-f" "6d1a976be4d6cbfb40c3605e8da56953c4ee0ddd6f99e6deac2639a68c682a06"`
Oct 12 14:16:29.772 INFO blam! 6d1a976be4d6cbfb40c3605e8da56953c4ee0ddd6f99e6deac2639a68c682a06