Nov 27 21:01:46.283 INFO checking sbwtw/RBTree against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 27 21:01:46.283 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-3/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 27 21:01:46.712 INFO [stdout] 686ee17506ae72bb5b6b37515ccf2dd8fd783a1abb3dd18546b3400483a8c7b3
Nov 27 21:01:46.712 INFO running `"docker" "start" "-a" "686ee17506ae72bb5b6b37515ccf2dd8fd783a1abb3dd18546b3400483a8c7b3"`
Nov 27 21:01:47.603 INFO [stderr] usermod: no changes
Nov 27 21:01:47.644 INFO [stderr]     Checking rbtree v0.1.0 (/source)
Nov 27 21:01:48.168 INFO [stderr] warning: variant is never constructed: `Red`
Nov 27 21:01:48.168 INFO [stderr]  --> src/main.rs:7:5
Nov 27 21:01:48.168 INFO [stderr]   |
Nov 27 21:01:48.168 INFO [stderr] 7 |     Red,
Nov 27 21:01:48.168 INFO [stderr]   |     ^^^
Nov 27 21:01:48.168 INFO [stderr]   |
Nov 27 21:01:48.168 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 27 21:01:48.168 INFO [stderr] 
Nov 27 21:01:48.168 INFO [stderr] warning: enum is never used: `Direction`
Nov 27 21:01:48.168 INFO [stderr]   --> src/main.rs:12:1
Nov 27 21:01:48.168 INFO [stderr]    |
Nov 27 21:01:48.168 INFO [stderr] 12 | enum Direction {
Nov 27 21:01:48.168 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 27 21:01:48.168 INFO [stderr] 
Nov 27 21:01:48.168 INFO [stderr] warning: function is never used: `ensure_root_black`
Nov 27 21:01:48.168 INFO [stderr]   --> src/main.rs:79:1
Nov 27 21:01:48.168 INFO [stderr]    |
Nov 27 21:01:48.168 INFO [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Nov 27 21:01:48.168 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 21:01:48.168 INFO [stderr] 
Nov 27 21:01:48.168 INFO [stderr] warning: function is never used: `insert_n`
Nov 27 21:01:48.168 INFO [stderr]   --> src/main.rs:85:1
Nov 27 21:01:48.168 INFO [stderr]    |
Nov 27 21:01:48.168 INFO [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Nov 27 21:01:48.168 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 21:01:48.168 INFO [stderr] 
Nov 27 21:01:48.168 INFO [stderr] warning: method is never used: `set_color`
Nov 27 21:01:48.168 INFO [stderr]    --> src/main.rs:120:5
Nov 27 21:01:48.168 INFO [stderr]     |
Nov 27 21:01:48.168 INFO [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
Nov 27 21:01:48.168 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 21:01:48.168 INFO [stderr] 
Nov 27 21:01:48.232 INFO [stderr] warning: variant is never constructed: `Red`
Nov 27 21:01:48.232 INFO [stderr]  --> src/main.rs:7:5
Nov 27 21:01:48.232 INFO [stderr]   |
Nov 27 21:01:48.232 INFO [stderr] 7 |     Red,
Nov 27 21:01:48.232 INFO [stderr]   |     ^^^
Nov 27 21:01:48.232 INFO [stderr]   |
Nov 27 21:01:48.232 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 27 21:01:48.232 INFO [stderr] 
Nov 27 21:01:48.232 INFO [stderr] warning: enum is never used: `Direction`
Nov 27 21:01:48.232 INFO [stderr]   --> src/main.rs:12:1
Nov 27 21:01:48.232 INFO [stderr]    |
Nov 27 21:01:48.232 INFO [stderr] 12 | enum Direction {
Nov 27 21:01:48.232 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 27 21:01:48.232 INFO [stderr] 
Nov 27 21:01:48.232 INFO [stderr] warning: function is never used: `ensure_root_black`
Nov 27 21:01:48.232 INFO [stderr]   --> src/main.rs:79:1
Nov 27 21:01:48.232 INFO [stderr]    |
Nov 27 21:01:48.232 INFO [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Nov 27 21:01:48.232 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 21:01:48.232 INFO [stderr] 
Nov 27 21:01:48.232 INFO [stderr] warning: function is never used: `insert_n`
Nov 27 21:01:48.232 INFO [stderr]   --> src/main.rs:85:1
Nov 27 21:01:48.232 INFO [stderr]    |
Nov 27 21:01:48.232 INFO [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Nov 27 21:01:48.232 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 21:01:48.232 INFO [stderr] 
Nov 27 21:01:48.232 INFO [stderr] warning: method is never used: `set_color`
Nov 27 21:01:48.232 INFO [stderr]    --> src/main.rs:120:5
Nov 27 21:01:48.232 INFO [stderr]     |
Nov 27 21:01:48.232 INFO [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
Nov 27 21:01:48.232 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 21:01:48.232 INFO [stderr] 
Nov 27 21:01:48.265 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
Nov 27 21:01:48.271 INFO [stderr] su: No module specific data is present
Nov 27 21:01:48.634 INFO running `"docker" "inspect" "686ee17506ae72bb5b6b37515ccf2dd8fd783a1abb3dd18546b3400483a8c7b3"`
Nov 27 21:01:48.918 INFO running `"docker" "rm" "-f" "686ee17506ae72bb5b6b37515ccf2dd8fd783a1abb3dd18546b3400483a8c7b3"`
Nov 27 21:01:49.162 INFO [stdout] 686ee17506ae72bb5b6b37515ccf2dd8fd783a1abb3dd18546b3400483a8c7b3