Dec 11 10:05:29.417 INFO checking sbwtw/RBTree against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 10:05:29.417 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/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 +aa9aa79c3c583aab59ac9134542d60a780c35e2e-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"`
Dec 11 10:05:29.720 INFO [stdout] 62989c23ad3cb750775e5bedb25a66033884af239d9d3135b3f7b7e91a1ec745
Dec 11 10:05:29.728 INFO running `"docker" "start" "-a" "62989c23ad3cb750775e5bedb25a66033884af239d9d3135b3f7b7e91a1ec745"`
Dec 11 10:05:30.189 INFO [stderr] usermod: no changes
Dec 11 10:05:30.232 INFO [stderr]     Checking rbtree v0.1.0 (/source)
Dec 11 10:05:30.587 INFO [stderr] warning: variant is never constructed: `Red`
Dec 11 10:05:30.587 INFO [stderr]  --> src/main.rs:7:5
Dec 11 10:05:30.587 INFO [stderr]   |
Dec 11 10:05:30.587 INFO [stderr] 7 |     Red,
Dec 11 10:05:30.587 INFO [stderr]   |     ^^^
Dec 11 10:05:30.587 INFO [stderr]   |
Dec 11 10:05:30.587 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 10:05:30.587 INFO [stderr] 
Dec 11 10:05:30.587 INFO [stderr] warning: enum is never used: `Direction`
Dec 11 10:05:30.587 INFO [stderr]   --> src/main.rs:12:1
Dec 11 10:05:30.587 INFO [stderr]    |
Dec 11 10:05:30.587 INFO [stderr] 12 | enum Direction {
Dec 11 10:05:30.587 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 11 10:05:30.587 INFO [stderr] 
Dec 11 10:05:30.587 INFO [stderr] warning: function is never used: `ensure_root_black`
Dec 11 10:05:30.587 INFO [stderr]   --> src/main.rs:79:1
Dec 11 10:05:30.587 INFO [stderr]    |
Dec 11 10:05:30.587 INFO [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Dec 11 10:05:30.587 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 10:05:30.587 INFO [stderr] 
Dec 11 10:05:30.587 INFO [stderr] warning: function is never used: `insert_n`
Dec 11 10:05:30.587 INFO [stderr]   --> src/main.rs:85:1
Dec 11 10:05:30.588 INFO [stderr]    |
Dec 11 10:05:30.588 INFO [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Dec 11 10:05:30.588 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 10:05:30.588 INFO [stderr] 
Dec 11 10:05:30.588 INFO [stderr] warning: method is never used: `set_color`
Dec 11 10:05:30.588 INFO [stderr]    --> src/main.rs:120:5
Dec 11 10:05:30.588 INFO [stderr]     |
Dec 11 10:05:30.588 INFO [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
Dec 11 10:05:30.588 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 10:05:30.588 INFO [stderr] 
Dec 11 10:05:30.591 INFO [stderr] warning: variant is never constructed: `Red`
Dec 11 10:05:30.591 INFO [stderr]  --> src/main.rs:7:5
Dec 11 10:05:30.591 INFO [stderr]   |
Dec 11 10:05:30.591 INFO [stderr] 7 |     Red,
Dec 11 10:05:30.591 INFO [stderr]   |     ^^^
Dec 11 10:05:30.591 INFO [stderr]   |
Dec 11 10:05:30.591 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 10:05:30.591 INFO [stderr] 
Dec 11 10:05:30.591 INFO [stderr] warning: enum is never used: `Direction`
Dec 11 10:05:30.591 INFO [stderr]   --> src/main.rs:12:1
Dec 11 10:05:30.591 INFO [stderr]    |
Dec 11 10:05:30.591 INFO [stderr] 12 | enum Direction {
Dec 11 10:05:30.591 INFO [stderr]    | ^^^^^^^^^^^^^^
Dec 11 10:05:30.591 INFO [stderr] 
Dec 11 10:05:30.591 INFO [stderr] warning: function is never used: `ensure_root_black`
Dec 11 10:05:30.591 INFO [stderr]   --> src/main.rs:79:1
Dec 11 10:05:30.591 INFO [stderr]    |
Dec 11 10:05:30.591 INFO [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Dec 11 10:05:30.591 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 10:05:30.591 INFO [stderr] 
Dec 11 10:05:30.591 INFO [stderr] warning: function is never used: `insert_n`
Dec 11 10:05:30.591 INFO [stderr]   --> src/main.rs:85:1
Dec 11 10:05:30.591 INFO [stderr]    |
Dec 11 10:05:30.591 INFO [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Dec 11 10:05:30.591 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 10:05:30.591 INFO [stderr] 
Dec 11 10:05:30.591 INFO [stderr] warning: method is never used: `set_color`
Dec 11 10:05:30.591 INFO [stderr]    --> src/main.rs:120:5
Dec 11 10:05:30.591 INFO [stderr]     |
Dec 11 10:05:30.591 INFO [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
Dec 11 10:05:30.591 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 10:05:30.591 INFO [stderr] 
Dec 11 10:05:30.622 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
Dec 11 10:05:30.622 INFO [stderr] su: No module specific data is present
Dec 11 10:05:31.408 INFO running `"docker" "inspect" "62989c23ad3cb750775e5bedb25a66033884af239d9d3135b3f7b7e91a1ec745"`
Dec 11 10:05:31.610 INFO running `"docker" "rm" "-f" "62989c23ad3cb750775e5bedb25a66033884af239d9d3135b3f7b7e91a1ec745"`
Dec 11 10:05:31.932 INFO [stdout] 62989c23ad3cb750775e5bedb25a66033884af239d9d3135b3f7b7e91a1ec745