[INFO] updating cached repository sbwtw/RBTree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sbwtw/RBTree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sbwtw/RBTree" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/sbwtw/RBTree"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/sbwtw/RBTree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sbwtw/RBTree" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/sbwtw/RBTree"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/sbwtw/RBTree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ab8c988a7cb8a70dbbae4e8589e805bafdfc2f49
[INFO] sha for GitHub repo sbwtw/RBTree: ab8c988a7cb8a70dbbae4e8589e805bafdfc2f49
[INFO] validating manifest of sbwtw/RBTree on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sbwtw/RBTree on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sbwtw/RBTree
[INFO] finished frobbing sbwtw/RBTree
[INFO] frobbed toml for sbwtw/RBTree written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/sbwtw/RBTree/Cargo.toml
[INFO] started frobbing sbwtw/RBTree
[INFO] finished frobbing sbwtw/RBTree
[INFO] frobbed toml for sbwtw/RBTree written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/sbwtw/RBTree/Cargo.toml
[INFO] crate sbwtw/RBTree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sbwtw/RBTree against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-2/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/sbwtw/RBTree:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cd9e9ba520e69690e828358ff24441a4f22ca17f644a05864bde2ed8f54bfcbc
[INFO] running `"docker" "start" "-a" "cd9e9ba520e69690e828358ff24441a4f22ca17f644a05864bde2ed8f54bfcbc"`
[INFO] [stderr]     Checking rbtree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:151:1
[INFO] [stderr]     |
[INFO] [stderr] 151 | / ///
[INFO] [stderr] 152 | | ///         123 -> "1234"
[INFO] [stderr] 153 | | ///        /          \
[INFO] [stderr] 154 | | ///  120 -> "120"   126 -> "126"
[INFO] [stderr] 155 | | ///
[INFO] [stderr]     | |___^
[INFO] [stderr] 156 |       assert_eq!(None, tree.get_mut(123));
[INFO] [stderr]     |       ------------------------------------ rustdoc does not generate documentation for macro expansions
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/main.rs:151:1
[INFO] [stderr]     |
[INFO] [stderr] 151 | / ///
[INFO] [stderr] 152 | | ///         123 -> "1234"
[INFO] [stderr] 153 | | ///        /          \
[INFO] [stderr] 154 | | ///  120 -> "120"   126 -> "126"
[INFO] [stderr] 155 | | ///
[INFO] [stderr]     | |___^
[INFO] [stderr] 156 |       assert_eq!(None, tree.get_mut(123));
[INFO] [stderr]     |       ------------------------------------ rustdoc does not generate documentation for macro expansions
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Red,
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Direction`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | enum Direction {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ensure_root_black`
[INFO] [stderr]   --> src/main.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `insert_n`
[INFO] [stderr]   --> src/main.rs:85:1
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_color`
[INFO] [stderr]    --> src/main.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Red,
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Direction`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | enum Direction {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ensure_root_black`
[INFO] [stderr]   --> src/main.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn ensure_root_black<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `insert_n`
[INFO] [stderr]   --> src/main.rs:85:1
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn insert_n<K: KeyTrait, V: ValueTrait>(root: &mut OptNode<K, V>, key: K, value: V) -> Option<V> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_color`
[INFO] [stderr]    --> src/main.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     fn set_color(&mut self, color: RBColor) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "cd9e9ba520e69690e828358ff24441a4f22ca17f644a05864bde2ed8f54bfcbc"`
[INFO] running `"docker" "rm" "-f" "cd9e9ba520e69690e828358ff24441a4f22ca17f644a05864bde2ed8f54bfcbc"`
[INFO] [stdout] cd9e9ba520e69690e828358ff24441a4f22ca17f644a05864bde2ed8f54bfcbc