Nov 29 18:48:50.690 INFO checking sbwtw/RBTree against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 29 18:48:50.690 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-2/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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 29 18:48:51.230 INFO [stdout] f9d2255528fe62f539d2c51cac040f9da438c02f1a0613788eb94c4ac57851bf
Nov 29 18:48:51.232 INFO running `"docker" "start" "-a" "f9d2255528fe62f539d2c51cac040f9da438c02f1a0613788eb94c4ac57851bf"`
Nov 29 18:48:52.452 INFO [stderr] usermod: no changes
Nov 29 18:48:52.496 INFO [stderr]     Checking rbtree v0.1.0 (/source)
Nov 29 18:48:52.948 INFO [stderr] warning: variant is never constructed: `Red`
Nov 29 18:48:52.948 INFO [stderr]  --> src/main.rs:7:5
Nov 29 18:48:52.948 INFO [stderr]   |
Nov 29 18:48:52.948 INFO [stderr] 7 |     Red,
Nov 29 18:48:52.948 INFO [stderr]   |     ^^^
Nov 29 18:48:52.948 INFO [stderr]   |
Nov 29 18:48:52.948 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 29 18:48:52.948 INFO [stderr] 
Nov 29 18:48:52.948 INFO [stderr] warning: enum is never used: `Direction`
Nov 29 18:48:52.948 INFO [stderr]   --> src/main.rs:12:1
Nov 29 18:48:52.948 INFO [stderr]    |
Nov 29 18:48:52.948 INFO [stderr] 12 | enum Direction {
Nov 29 18:48:52.948 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 29 18:48:52.948 INFO [stderr] 
Nov 29 18:48:52.948 INFO [stderr] warning: function is never used: `ensure_root_black`
Nov 29 18:48:52.948 INFO [stderr]   --> src/main.rs:79:1
Nov 29 18:48:52.948 INFO [stderr]    |
Nov 29 18:48:52.948 INFO [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Nov 29 18:48:52.948 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:48:52.948 INFO [stderr] 
Nov 29 18:48:52.949 INFO [stderr] warning: function is never used: `insert_n`
Nov 29 18:48:52.949 INFO [stderr]   --> src/main.rs:85:1
Nov 29 18:48:52.949 INFO [stderr]    |
Nov 29 18:48:52.949 INFO [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Nov 29 18:48:52.949 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:48:52.949 INFO [stderr] 
Nov 29 18:48:52.949 INFO [stderr] warning: method is never used: `set_color`
Nov 29 18:48:52.949 INFO [stderr]    --> src/main.rs:120:5
Nov 29 18:48:52.949 INFO [stderr]     |
Nov 29 18:48:52.949 INFO [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
Nov 29 18:48:52.949 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:48:52.949 INFO [stderr] 
Nov 29 18:48:53.052 INFO [stderr] warning: variant is never constructed: `Red`
Nov 29 18:48:53.052 INFO [stderr]  --> src/main.rs:7:5
Nov 29 18:48:53.052 INFO [stderr]   |
Nov 29 18:48:53.052 INFO [stderr] 7 |     Red,
Nov 29 18:48:53.052 INFO [stderr]   |     ^^^
Nov 29 18:48:53.052 INFO [stderr]   |
Nov 29 18:48:53.052 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 29 18:48:53.052 INFO [stderr] 
Nov 29 18:48:53.052 INFO [stderr] warning: enum is never used: `Direction`
Nov 29 18:48:53.052 INFO [stderr]   --> src/main.rs:12:1
Nov 29 18:48:53.052 INFO [stderr]    |
Nov 29 18:48:53.052 INFO [stderr] 12 | enum Direction {
Nov 29 18:48:53.052 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 29 18:48:53.052 INFO [stderr] 
Nov 29 18:48:53.052 INFO [stderr] warning: function is never used: `ensure_root_black`
Nov 29 18:48:53.052 INFO [stderr]   --> src/main.rs:79:1
Nov 29 18:48:53.052 INFO [stderr]    |
Nov 29 18:48:53.052 INFO [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
Nov 29 18:48:53.052 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:48:53.052 INFO [stderr] 
Nov 29 18:48:53.052 INFO [stderr] warning: function is never used: `insert_n`
Nov 29 18:48:53.052 INFO [stderr]   --> src/main.rs:85:1
Nov 29 18:48:53.052 INFO [stderr]    |
Nov 29 18:48:53.052 INFO [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
Nov 29 18:48:53.052 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:48:53.052 INFO [stderr] 
Nov 29 18:48:53.052 INFO [stderr] warning: method is never used: `set_color`
Nov 29 18:48:53.052 INFO [stderr]    --> src/main.rs:120:5
Nov 29 18:48:53.052 INFO [stderr]     |
Nov 29 18:48:53.052 INFO [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
Nov 29 18:48:53.052 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 18:48:53.052 INFO [stderr] 
Nov 29 18:48:53.072 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
Nov 29 18:48:53.080 INFO [stderr] su: No module specific data is present
Nov 29 18:48:53.668 INFO running `"docker" "inspect" "f9d2255528fe62f539d2c51cac040f9da438c02f1a0613788eb94c4ac57851bf"`
Nov 29 18:48:54.046 INFO running `"docker" "rm" "-f" "f9d2255528fe62f539d2c51cac040f9da438c02f1a0613788eb94c4ac57851bf"`
Nov 29 18:48:54.462 INFO [stdout] f9d2255528fe62f539d2c51cac040f9da438c02f1a0613788eb94c4ac57851bf