[INFO] cloning repository https://github.com/tcaputi/rust-bplus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tcaputi/rust-bplus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftcaputi%2Frust-bplus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftcaputi%2Frust-bplus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 152425b3cb422f8e83ed76b8a4af6ff2c6e9f5d1
[INFO] testing tcaputi/rust-bplus against master#1f7f8ea0721a3b1eb73e6c6d25cccb371434b320 for pr-154065-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftcaputi%2Frust-bplus" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tcaputi/rust-bplus
[INFO] finished tweaking git repo https://github.com/tcaputi/rust-bplus
[INFO] tweaked toml for git repo https://github.com/tcaputi/rust-bplus written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tcaputi/rust-bplus on toolchain 1f7f8ea0721a3b1eb73e6c6d25cccb371434b320
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tcaputi/rust-bplus already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e84cff5e08b350e2cccea24d7265f2db82cc0d9d407d173e8db7777d288aa46e
[INFO] running `Command { std: "docker" "start" "-a" "e84cff5e08b350e2cccea24d7265f2db82cc0d9d407d173e8db7777d288aa46e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e84cff5e08b350e2cccea24d7265f2db82cc0d9d407d173e8db7777d288aa46e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e84cff5e08b350e2cccea24d7265f2db82cc0d9d407d173e8db7777d288aa46e", kill_on_drop: false }`
[INFO] [stdout] e84cff5e08b350e2cccea24d7265f2db82cc0d9d407d173e8db7777d288aa46e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3b9f9dceda5abad7271b66af531b29577879daa454dfdd1810d729972de4de4
[INFO] running `Command { std: "docker" "start" "-a" "f3b9f9dceda5abad7271b66af531b29577879daa454dfdd1810d729972de4de4", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling bplus_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:75:21
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let mut node = Rc::get_mut(node_rc).unwrap(); /* unwrap the Rc */
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interior`
[INFO] [stdout]   --> src/main.rs:78:41
[INFO] [stdout]    |
[INFO] [stdout] 78 |                     BPlusNode::Interior(ref mut interior) => {
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interior`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree`
[INFO] [stdout]    --> src/main.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let tree: BPlusTree<u64, TestData> = BPlusTree::new();
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `parent`, `keys`, and `values` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct BPlusLeaf<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 17 |     parent: Option<Weak<BPlusInterior<K, V>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 18 |     keys: Vec<K>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 19 |     values: Vec<V>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `parent`, `keys`, and `children` are never read
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct BPlusInterior<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |        ------------- fields in this struct
[INFO] [stdout] 30 |     parent: Option<Weak<BPlusInterior<K, V>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 31 |     keys: Vec<K>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     children: Vec<Rc<BPlusNode<K, V>>>
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Leaf` and `Interior` are never constructed
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | enum BPlusNode<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 40 |     Leaf(BPlusLeaf<K, V>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 41 |     Interior(BPlusInterior<K, V>)
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `root` is never read
[INFO] [stdout]   --> src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct BPlusTree<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 50 |     root: Option<Rc<BPlusNode<K, V>>>
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `insert` is never used
[INFO] [stdout]   --> src/main.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl<K: Ord + Copy, V: Copy> BPlusTree<K, V> {
[INFO] [stdout]    | -------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn insert(&mut self, key: &K, value: &V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/main.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 97 | struct TestData {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 98 |     data: [u64;  4],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TestData` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "f3b9f9dceda5abad7271b66af531b29577879daa454dfdd1810d729972de4de4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3b9f9dceda5abad7271b66af531b29577879daa454dfdd1810d729972de4de4", kill_on_drop: false }`
[INFO] [stdout] f3b9f9dceda5abad7271b66af531b29577879daa454dfdd1810d729972de4de4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb0acb83ccd109d9150c6b44fd14707de5461fac58faa1c3a4f05ac348174dbd
[INFO] running `Command { std: "docker" "start" "-a" "fb0acb83ccd109d9150c6b44fd14707de5461fac58faa1c3a4f05ac348174dbd", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling bplus_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:75:21
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let mut node = Rc::get_mut(node_rc).unwrap(); /* unwrap the Rc */
[INFO] [stdout]    |                     ----^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `interior`
[INFO] [stdout]   --> src/main.rs:78:41
[INFO] [stdout]    |
[INFO] [stdout] 78 |                     BPlusNode::Interior(ref mut interior) => {
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interior`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree`
[INFO] [stdout]    --> src/main.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let tree: BPlusTree<u64, TestData> = BPlusTree::new();
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `parent`, `keys`, and `values` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct BPlusLeaf<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 17 |     parent: Option<Weak<BPlusInterior<K, V>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 18 |     keys: Vec<K>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 19 |     values: Vec<V>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `parent`, `keys`, and `children` are never read
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct BPlusInterior<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |        ------------- fields in this struct
[INFO] [stdout] 30 |     parent: Option<Weak<BPlusInterior<K, V>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 31 |     keys: Vec<K>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     children: Vec<Rc<BPlusNode<K, V>>>
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Leaf` and `Interior` are never constructed
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | enum BPlusNode<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 40 |     Leaf(BPlusLeaf<K, V>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 41 |     Interior(BPlusInterior<K, V>)
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `root` is never read
[INFO] [stdout]   --> src/main.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct BPlusTree<K: Ord + Copy, V: Copy> {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 50 |     root: Option<Rc<BPlusNode<K, V>>>
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `insert` is never used
[INFO] [stdout]   --> src/main.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl<K: Ord + Copy, V: Copy> BPlusTree<K, V> {
[INFO] [stdout]    | -------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn insert(&mut self, key: &K, value: &V) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/main.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 97 | struct TestData {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 98 |     data: [u64;  4],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TestData` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "fb0acb83ccd109d9150c6b44fd14707de5461fac58faa1c3a4f05ac348174dbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb0acb83ccd109d9150c6b44fd14707de5461fac58faa1c3a4f05ac348174dbd", kill_on_drop: false }`
[INFO] [stdout] fb0acb83ccd109d9150c6b44fd14707de5461fac58faa1c3a4f05ac348174dbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1f7f8ea0721a3b1eb73e6c6d25cccb371434b320" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 79133279aa521a361e8c6e888d1ec55f009f83aaa41500a58f95e8d4b433aa4d
[INFO] running `Command { std: "docker" "start" "-a" "79133279aa521a361e8c6e888d1ec55f009f83aaa41500a58f95e8d4b433aa4d", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:75:21
[INFO] [stderr]    |
[INFO] [stderr] 75 |                 let mut node = Rc::get_mut(node_rc).unwrap(); /* unwrap the Rc */
[INFO] [stderr]    |                     ----^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `interior`
[INFO] [stderr]   --> src/main.rs:78:41
[INFO] [stderr]    |
[INFO] [stderr] 78 |                     BPlusNode::Interior(ref mut interior) => {
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_interior`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tree`
[INFO] [stderr]    --> src/main.rs:102:9
[INFO] [stderr]     |
[INFO] [stderr] 102 |     let tree: BPlusTree<u64, TestData> = BPlusTree::new();
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `parent`, `keys`, and `values` are never read
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct BPlusLeaf<K: Ord + Copy, V: Copy> {
[INFO] [stderr]    |        --------- fields in this struct
[INFO] [stderr] 17 |     parent: Option<Weak<BPlusInterior<K, V>>>,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 18 |     keys: Vec<K>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 19 |     values: Vec<V>,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `parent`, `keys`, and `children` are never read
[INFO] [stderr]   --> src/main.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct BPlusInterior<K: Ord + Copy, V: Copy> {
[INFO] [stderr]    |        ------------- fields in this struct
[INFO] [stderr] 30 |     parent: Option<Weak<BPlusInterior<K, V>>>,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 31 |     keys: Vec<K>,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 32 |     children: Vec<Rc<BPlusNode<K, V>>>
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Leaf` and `Interior` are never constructed
[INFO] [stderr]   --> src/main.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 39 | enum BPlusNode<K: Ord + Copy, V: Copy> {
[INFO] [stderr]    |      --------- variants in this enum
[INFO] [stderr] 40 |     Leaf(BPlusLeaf<K, V>),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 41 |     Interior(BPlusInterior<K, V>)
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `root` is never read
[INFO] [stderr]   --> src/main.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct BPlusTree<K: Ord + Copy, V: Copy> {
[INFO] [stderr]    |        --------- field in this struct
[INFO] [stderr] 50 |     root: Option<Rc<BPlusNode<K, V>>>
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `insert` is never used
[INFO] [stderr]   --> src/main.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | impl<K: Ord + Copy, V: Copy> BPlusTree<K, V> {
[INFO] [stderr]    | -------------------------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 59 |     fn insert(&mut self, key: &K, value: &V) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `data` is never read
[INFO] [stderr]   --> src/main.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 97 | struct TestData {
[INFO] [stderr]    |        -------- field in this struct
[INFO] [stderr] 98 |     data: [u64;  4],
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TestData` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `bplus_tree` (bin "bplus_tree" test) generated 9 warnings (run `cargo fix --bin "bplus_tree" -p bplus_tree --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/bplus_tree-6d1a07b8662d9755)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "79133279aa521a361e8c6e888d1ec55f009f83aaa41500a58f95e8d4b433aa4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79133279aa521a361e8c6e888d1ec55f009f83aaa41500a58f95e8d4b433aa4d", kill_on_drop: false }`
[INFO] [stdout] 79133279aa521a361e8c6e888d1ec55f009f83aaa41500a58f95e8d4b433aa4d
