[INFO] cloning repository https://github.com/RyuAlize/KVStore
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/RyuAlize/KVStore" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyuAlize%2FKVStore", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyuAlize%2FKVStore'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef119da7a9be61c49067c019f4b35eee6769cc18
[INFO] testing RyuAlize/KVStore against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyuAlize%2FKVStore" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RyuAlize/KVStore on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RyuAlize/KVStore
[INFO] finished tweaking git repo https://github.com/RyuAlize/KVStore
[INFO] tweaked toml for git repo https://github.com/RyuAlize/KVStore written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/RyuAlize/KVStore 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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3fa184b0fe0b6486c429e62b1455b3efd49233e7e9223d22edbf84172256e0ad
[INFO] running `Command { std: "docker" "start" "-a" "3fa184b0fe0b6486c429e62b1455b3efd49233e7e9223d22edbf84172256e0ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fa184b0fe0b6486c429e62b1455b3efd49233e7e9223d22edbf84172256e0ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fa184b0fe0b6486c429e62b1455b3efd49233e7e9223d22edbf84172256e0ad", kill_on_drop: false }`
[INFO] [stdout] 3fa184b0fe0b6486c429e62b1455b3efd49233e7e9223d22edbf84172256e0ad
[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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7979cfd8e50ffcf10464d1606a453c57d56f478d46119a673467e311c9353e32
[INFO] running `Command { std: "docker" "start" "-a" "7979cfd8e50ffcf10464d1606a453c57d56f478d46119a673467e311c9353e32", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling KVStore v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/bptree.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stdout]   --> src/engine/bptree.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stdout]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]  --> src/engine/btnode.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stdout]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryFrom`
[INFO] [stdout]  --> src/engine/btnode.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/engine/btnode.rs:325:85
[INFO] [stdout]     |
[INFO] [stdout] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |                                                                                     ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/page.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/engine/bptree.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/bptree.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut root_node;
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/bptree.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:207:33
[INFO] [stdout]     |
[INFO] [stdout] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:397:24
[INFO] [stdout]     |
[INFO] [stdout] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:504:13
[INFO] [stdout]     |
[INFO] [stdout] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:569:24
[INFO] [stdout]     |
[INFO] [stdout] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:570:25
[INFO] [stdout]     |
[INFO] [stdout] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/engine/page.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             for i in offset..end {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     pub fn remove(
[INFO] [stdout] 153 | |         mut self,
[INFO] [stdout] 154 | |         key: &K,
[INFO] [stdout] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stdout] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stdout] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 | /     pub fn remove<V>(
[INFO] [stdout] 386 | |         mut self,
[INFO] [stdout] 387 | |         key: &K,
[INFO] [stdout] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 392 | |     where
[INFO] [stdout] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stdout]    --> src/engine/btnode.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 | /     pub fn remove_page<V>(
[INFO] [stdout] 412 | |         &mut self,
[INFO] [stdout] 413 | |         page_ptr: PagePtr,
[INFO] [stdout] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | |     where
[INFO] [stdout] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get`, `set`, and `remove` are never used
[INFO] [stdout]   --> src/engine/mod.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub trait KVStoreEngine<K,V> {
[INFO] [stdout]    |           ------------- methods in this trait
[INFO] [stdout] 9  |     fn get(&self, key: &K) -> Result<V>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 10 |     fn set(&mut self, key: K, value: V) -> Result<()>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 11 |     fn remove(&mut self, key: &K) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/engine/array.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<K: PartialEq,V> ArrayKVStore<K,V> {
[INFO] [stdout]    | -------------------------------------- associated function in this implementation
[INFO] [stdout] 29 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BPTree` is never constructed
[INFO] [stdout]   --> src/engine/bptree.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BPTree<K,V> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/bptree.rs:30:12
[INFO] [stdout]     |
[INFO] [stdout] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stdout] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stdout] 29  |   {
[INFO] [stdout] 30  |       pub fn new<P: AsRef<Path>>(path: P, override_max_key_count: Option<u64>) -> Result<Self>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57  |       pub fn set(&mut self, key: K, value: V) -> Result<()> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 71  |       pub fn get(&mut self, key: K) -> Result<V> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |       pub fn remove(&mut self, key: &K) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98  |       pub fn max_key_count(&self) -> u64 {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |       pub fn split_at(&self) -> usize {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |       pub fn next_page_ptr(&mut self) -> PagePtr {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |       fn create_root_node(&mut self) -> Node<K,V> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |       fn create_new_root(&mut self, key: K, new_page_ptr: PagePtr) -> Result<()> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 132 |       pub fn get_pager(&mut self) -> &mut Pager {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 136 |       pub fn set_root(&mut self, new_root_ptr: Option<PagePtr>) {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |       pub fn delete_page(&mut self, ptr: PagePtr){
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |       pub fn print_deleted(&self) {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LEAF_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const LEAF_NODE_TYPE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INNER_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const INNER_NODE_TYPE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const PAGE_PTR_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const KEYS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const VALUES_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const CHILD_PTRS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const PAGE_PTR_OFFSET: usize = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_TYPE_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const NODE_TYPE_OFFSET: usize = PAGE_PTR_LEN; //8
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HAS_NEXT_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const HAS_NEXT_OFFSET: usize = PAGE_PTR_LEN + 1; //9
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NEXT_PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const NEXT_PAGE_PTR_OFFSET: usize = HAS_NEXT_OFFSET + 1;//10
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const KEYS_LEN_OFFSET: usize = NEXT_PAGE_PTR_OFFSET + PAGE_PTR_LEN;//18
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 | const VALUES_LEN_OFFSET: usize = KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | const CHILD_PTRS_LEN_OFFSET: usize =  KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LeafNode` is never constructed
[INFO] [stdout]   --> src/engine/btnode.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct LeafNode<K, V>
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LeafNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:41:12
[INFO] [stdout]     |
[INFO] [stdout] 37  | / impl<K, V> LeafNode<K, V>
[INFO] [stdout] 38  | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 39  | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 40  |   {
[INFO] [stdout] 41  |       pub fn new(page_ptr: PagePtr) -> Self{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59  |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |       pub fn get(&self, key: &K) -> Option<V>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |       fn insert(&mut self, i: usize, key: K, value: V) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       pub fn set(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |       pub fn remove(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |       pub fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 227 |       pub fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChildNodeInfo` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:239:8
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InnerNode` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:249:12
[INFO] [stdout]     |
[INFO] [stdout] 249 | pub struct InnerNode<K>
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InnerNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:259:12
[INFO] [stdout]     |
[INFO] [stdout] 256 | / impl<K> InnerNode<K>
[INFO] [stdout] 257 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 258 |   {
[INFO] [stdout] 259 |       pub fn new(page_ptr: PagePtr) -> Self {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 267 |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 274 |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 303 |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 318 |       pub fn get(&self, key: &K) -> PagePtr {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |       pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 360 |       fn get_child_node_info(&self, key: &K) -> ChildNodeInfo {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 385 |       pub fn remove<V>(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 411 |       pub fn remove_page<V>(
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 498 |       fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 502 |       fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 510 |       fn insert(&mut self, i: usize, key: K, value: PagePtr) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Node` is never used
[INFO] [stdout]    --> src/engine/btnode.rs:517:10
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub enum Node<K, V> {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:526:12
[INFO] [stdout]     |
[INFO] [stdout] 522 | / impl<K, V> Node<K, V>
[INFO] [stdout] 523 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 524 | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 525 |   {
[INFO] [stdout] 526 |       pub fn store_node(self, pager: &mut Pager) -> Result<()>{
[INFO] [stdout]     |              ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 534 |       pub fn load_node(page_ptr: PagePtr, pager: &mut Pager) ->Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 543 |       pub fn get(self, key: &K, pager: &mut Pager) -> Result<Option<V>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 560 |       pub fn set(self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K,PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 567 |       pub fn remove(self, key: &K, bptree: &mut BPTree<K, V>) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 |       pub fn new_leaf(ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self{
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 578 |       pub fn new_inner(ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PagePtr` is never used
[INFO] [stdout]  --> src/engine/page.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub type PagePtr = u64;
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/engine/page.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_key_count` is never used
[INFO] [stdout]   --> src/engine/page.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn max_key_count(size_key: u64, size_value: u64) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_at` is never used
[INFO] [stdout]   --> src/engine/page.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn split_at(max_key_count: u64) -> usize {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Page{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `from_bytes`, `write_bytes_at_offset`, `get_bytes_from_offset`, `get_page_data`, and `get_page_byte` are never used
[INFO] [stdout]   --> src/engine/page.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 24 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn from_bytes(bytes: [u8; PAGE_SIZE]) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn get_page_data(&self) -> [u8; PAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn get_page_byte(&self, pos: usize) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pager` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct Pager {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `open`, `load_page`, `insert_page`, and `append_page` are never used
[INFO] [stdout]    --> src/engine/page.rs:75:12
[INFO] [stdout]     |
[INFO] [stdout] 74  | impl Pager{
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 75  |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self>{
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85  |     pub fn load_page(&mut self, page_ptr: PagePtr) -> Result<Page> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     pub fn insert_page(&mut self, page_ptr: PagePtr, page: &Page) -> Result<()>{
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub fn append_page(&mut self, page: &Page) -> Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `PageSizeNotEnough`, `PageNotFound`, `UnkonwNodeType`, and `RootPageIsNull` are never constructed
[INFO] [stdout]   --> src/error.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum Error{
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9  |     PageSizeNotEnough,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     #[error("Page not found")]
[INFO] [stdout] 11 |     PageNotFound,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     UnkonwNodeType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 18 |     #[error("roo page ptr is null ")]
[INFO] [stdout] 19 |     RootPageIsNull
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `KVStore` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `kvstore`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             self.inner[pos].setvalue(value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 55 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.23s
[INFO] running `Command { std: "docker" "inspect" "7979cfd8e50ffcf10464d1606a453c57d56f478d46119a673467e311c9353e32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7979cfd8e50ffcf10464d1606a453c57d56f478d46119a673467e311c9353e32", kill_on_drop: false }`
[INFO] [stdout] 7979cfd8e50ffcf10464d1606a453c57d56f478d46119a673467e311c9353e32
[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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ef1863b6c00f0c066cf22714b172c0646df08c840c9355f9e4e0c88af951364
[INFO] running `Command { std: "docker" "start" "-a" "6ef1863b6c00f0c066cf22714b172c0646df08c840c9355f9e4e0c88af951364", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/bptree.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stdout]   --> src/engine/bptree.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stdout]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]  --> src/engine/btnode.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stdout]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryFrom`
[INFO] [stdout]  --> src/engine/btnode.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/engine/btnode.rs:325:85
[INFO] [stdout]     |
[INFO] [stdout] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |                                                                                     ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/page.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/engine/bptree.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/bptree.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut root_node;
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/bptree.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:207:33
[INFO] [stdout]     |
[INFO] [stdout] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:397:24
[INFO] [stdout]     |
[INFO] [stdout] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:504:13
[INFO] [stdout]     |
[INFO] [stdout] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:569:24
[INFO] [stdout]     |
[INFO] [stdout] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:570:25
[INFO] [stdout]     |
[INFO] [stdout] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/engine/page.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             for i in offset..end {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     pub fn remove(
[INFO] [stdout] 153 | |         mut self,
[INFO] [stdout] 154 | |         key: &K,
[INFO] [stdout] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stdout] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stdout] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 | /     pub fn remove<V>(
[INFO] [stdout] 386 | |         mut self,
[INFO] [stdout] 387 | |         key: &K,
[INFO] [stdout] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 392 | |     where
[INFO] [stdout] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stdout]    --> src/engine/btnode.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 | /     pub fn remove_page<V>(
[INFO] [stdout] 412 | |         &mut self,
[INFO] [stdout] 413 | |         page_ptr: PagePtr,
[INFO] [stdout] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | |     where
[INFO] [stdout] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get`, `set`, and `remove` are never used
[INFO] [stdout]   --> src/engine/mod.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub trait KVStoreEngine<K,V> {
[INFO] [stdout]    |           ------------- methods in this trait
[INFO] [stdout] 9  |     fn get(&self, key: &K) -> Result<V>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 10 |     fn set(&mut self, key: K, value: V) -> Result<()>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 11 |     fn remove(&mut self, key: &K) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/engine/array.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<K: PartialEq,V> ArrayKVStore<K,V> {
[INFO] [stdout]    | -------------------------------------- associated function in this implementation
[INFO] [stdout] 29 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BPTree` is never constructed
[INFO] [stdout]   --> src/engine/bptree.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BPTree<K,V> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/bptree.rs:30:12
[INFO] [stdout]     |
[INFO] [stdout] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stdout] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stdout] 29  |   {
[INFO] [stdout] 30  |       pub fn new<P: AsRef<Path>>(path: P, override_max_key_count: Option<u64>) -> Result<Self>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57  |       pub fn set(&mut self, key: K, value: V) -> Result<()> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 71  |       pub fn get(&mut self, key: K) -> Result<V> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |       pub fn remove(&mut self, key: &K) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98  |       pub fn max_key_count(&self) -> u64 {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |       pub fn split_at(&self) -> usize {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |       pub fn next_page_ptr(&mut self) -> PagePtr {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |       fn create_root_node(&mut self) -> Node<K,V> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |       fn create_new_root(&mut self, key: K, new_page_ptr: PagePtr) -> Result<()> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 132 |       pub fn get_pager(&mut self) -> &mut Pager {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 136 |       pub fn set_root(&mut self, new_root_ptr: Option<PagePtr>) {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |       pub fn delete_page(&mut self, ptr: PagePtr){
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |       pub fn print_deleted(&self) {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LEAF_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const LEAF_NODE_TYPE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INNER_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const INNER_NODE_TYPE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const PAGE_PTR_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const KEYS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const VALUES_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const CHILD_PTRS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const PAGE_PTR_OFFSET: usize = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_TYPE_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const NODE_TYPE_OFFSET: usize = PAGE_PTR_LEN; //8
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HAS_NEXT_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const HAS_NEXT_OFFSET: usize = PAGE_PTR_LEN + 1; //9
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NEXT_PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const NEXT_PAGE_PTR_OFFSET: usize = HAS_NEXT_OFFSET + 1;//10
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const KEYS_LEN_OFFSET: usize = NEXT_PAGE_PTR_OFFSET + PAGE_PTR_LEN;//18
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 | const VALUES_LEN_OFFSET: usize = KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | const CHILD_PTRS_LEN_OFFSET: usize =  KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LeafNode` is never constructed
[INFO] [stdout]   --> src/engine/btnode.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct LeafNode<K, V>
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LeafNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:41:12
[INFO] [stdout]     |
[INFO] [stdout] 37  | / impl<K, V> LeafNode<K, V>
[INFO] [stdout] 38  | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 39  | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 40  |   {
[INFO] [stdout] 41  |       pub fn new(page_ptr: PagePtr) -> Self{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59  |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |       pub fn get(&self, key: &K) -> Option<V>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |       fn insert(&mut self, i: usize, key: K, value: V) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       pub fn set(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |       pub fn remove(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |       pub fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 227 |       pub fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChildNodeInfo` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:239:8
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InnerNode` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:249:12
[INFO] [stdout]     |
[INFO] [stdout] 249 | pub struct InnerNode<K>
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InnerNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:259:12
[INFO] [stdout]     |
[INFO] [stdout] 256 | / impl<K> InnerNode<K>
[INFO] [stdout] 257 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 258 |   {
[INFO] [stdout] 259 |       pub fn new(page_ptr: PagePtr) -> Self {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 267 |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 274 |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 303 |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 318 |       pub fn get(&self, key: &K) -> PagePtr {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |       pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 360 |       fn get_child_node_info(&self, key: &K) -> ChildNodeInfo {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 385 |       pub fn remove<V>(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 411 |       pub fn remove_page<V>(
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 498 |       fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 502 |       fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 510 |       fn insert(&mut self, i: usize, key: K, value: PagePtr) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Node` is never used
[INFO] [stdout]    --> src/engine/btnode.rs:517:10
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub enum Node<K, V> {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:526:12
[INFO] [stdout]     |
[INFO] [stdout] 522 | / impl<K, V> Node<K, V>
[INFO] [stdout] 523 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 524 | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 525 |   {
[INFO] [stdout] 526 |       pub fn store_node(self, pager: &mut Pager) -> Result<()>{
[INFO] [stdout]     |              ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 534 |       pub fn load_node(page_ptr: PagePtr, pager: &mut Pager) ->Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 543 |       pub fn get(self, key: &K, pager: &mut Pager) -> Result<Option<V>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 560 |       pub fn set(self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K,PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 567 |       pub fn remove(self, key: &K, bptree: &mut BPTree<K, V>) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 |       pub fn new_leaf(ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self{
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 578 |       pub fn new_inner(ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PagePtr` is never used
[INFO] [stdout]  --> src/engine/page.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub type PagePtr = u64;
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/engine/page.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_key_count` is never used
[INFO] [stdout]   --> src/engine/page.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn max_key_count(size_key: u64, size_value: u64) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_at` is never used
[INFO] [stdout]   --> src/engine/page.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn split_at(max_key_count: u64) -> usize {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Page{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `from_bytes`, `write_bytes_at_offset`, `get_bytes_from_offset`, `get_page_data`, and `get_page_byte` are never used
[INFO] [stdout]   --> src/engine/page.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 24 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn from_bytes(bytes: [u8; PAGE_SIZE]) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn get_page_data(&self) -> [u8; PAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn get_page_byte(&self, pos: usize) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pager` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct Pager {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `open`, `load_page`, `insert_page`, and `append_page` are never used
[INFO] [stdout]    --> src/engine/page.rs:75:12
[INFO] [stdout]     |
[INFO] [stdout] 74  | impl Pager{
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 75  |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self>{
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85  |     pub fn load_page(&mut self, page_ptr: PagePtr) -> Result<Page> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     pub fn insert_page(&mut self, page_ptr: PagePtr, page: &Page) -> Result<()>{
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub fn append_page(&mut self, page: &Page) -> Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `PageSizeNotEnough`, `PageNotFound`, `UnkonwNodeType`, and `RootPageIsNull` are never constructed
[INFO] [stdout]   --> src/error.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum Error{
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9  |     PageSizeNotEnough,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     #[error("Page not found")]
[INFO] [stdout] 11 |     PageNotFound,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     UnkonwNodeType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 18 |     #[error("roo page ptr is null ")]
[INFO] [stdout] 19 |     RootPageIsNull
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `KVStore` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `kvstore`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             self.inner[pos].setvalue(value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling KVStore v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 55 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/engine/array.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     use std::collections::HashMap;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/bptree.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stdout]   --> src/engine/bptree.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stdout]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]  --> src/engine/btnode.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stdout]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryFrom`
[INFO] [stdout]  --> src/engine/btnode.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/engine/btnode.rs:325:85
[INFO] [stdout]     |
[INFO] [stdout] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |                                                                                     ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/page.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/engine/bptree.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/bptree.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut root_node;
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/bptree.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:207:33
[INFO] [stdout]     |
[INFO] [stdout] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:397:24
[INFO] [stdout]     |
[INFO] [stdout] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:504:13
[INFO] [stdout]     |
[INFO] [stdout] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:569:24
[INFO] [stdout]     |
[INFO] [stdout] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:570:25
[INFO] [stdout]     |
[INFO] [stdout] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p1`
[INFO] [stdout]    --> src/engine/btnode.rs:603:13
[INFO] [stdout]     |
[INFO] [stdout] 603 |         let p1 = 15;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p2`
[INFO] [stdout]    --> src/engine/btnode.rs:604:13
[INFO] [stdout]     |
[INFO] [stdout] 604 |         let p2 = 17;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/engine/btnode.rs:616:21
[INFO] [stdout]     |
[INFO] [stdout] 616 |                 Err(e) => {println!("{} is removed", i)}
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/engine/page.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             for i in offset..end {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     pub fn remove(
[INFO] [stdout] 153 | |         mut self,
[INFO] [stdout] 154 | |         key: &K,
[INFO] [stdout] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stdout] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stdout] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 | /     pub fn remove<V>(
[INFO] [stdout] 386 | |         mut self,
[INFO] [stdout] 387 | |         key: &K,
[INFO] [stdout] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 392 | |     where
[INFO] [stdout] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stdout]    --> src/engine/btnode.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 | /     pub fn remove_page<V>(
[INFO] [stdout] 412 | |         &mut self,
[INFO] [stdout] 413 | |         page_ptr: PagePtr,
[INFO] [stdout] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | |     where
[INFO] [stdout] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key_size` and `value_size` are never read
[INFO] [stdout]   --> src/engine/bptree.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BPTree<K,V> {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |     key_size: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     value_size: u64,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `open` and `load_root` are never used
[INFO] [stdout]    --> src/engine/bptree.rs:53:12
[INFO] [stdout]     |
[INFO] [stdout] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stdout] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `write_bytes_at_offset`, and `get_bytes_from_offset` are never used
[INFO] [stdout]   --> src/engine/page.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 24 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `PageSizeNotEnough` is never constructed
[INFO] [stdout]  --> src/error.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Error{
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9 |     PageSizeNotEnough,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             self.inner[pos].setvalue(value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |         kvengine.set(1,2);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let _ = kvengine.set(1,2);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/engine/btnode.rs:593:13
[INFO] [stdout]     |
[INFO] [stdout] 593 |             bptree.set(i, i*10);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 593 |             let _ = bptree.set(i, i*10);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `Command { std: "docker" "inspect" "6ef1863b6c00f0c066cf22714b172c0646df08c840c9355f9e4e0c88af951364", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ef1863b6c00f0c066cf22714b172c0646df08c840c9355f9e4e0c88af951364", kill_on_drop: false }`
[INFO] [stdout] 6ef1863b6c00f0c066cf22714b172c0646df08c840c9355f9e4e0c88af951364
[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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 576e11f9061ec005ffd383a2ed94f660a11c7551dc9104694c66a054d1a2ad23
[INFO] running `Command { std: "docker" "start" "-a" "576e11f9061ec005ffd383a2ed94f660a11c7551dc9104694c66a054d1a2ad23", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/engine/bptree.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                       ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stderr]   --> src/engine/bptree.rs:10:35
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stderr]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stderr]  --> src/engine/btnode.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stderr]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TryFrom`
[INFO] [stderr]  --> src/engine/btnode.rs:8:20
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stderr]   |                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/engine/btnode.rs:325:85
[INFO] [stderr]     |
[INFO] [stderr] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stderr]     |                                                                                     ^                    ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stderr] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/engine/page.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::path::{PathBuf, Path};
[INFO] [stderr]   |                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/engine/bptree.rs:53:33
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/engine/bptree.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let mut root_node;
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/bptree.rs:120:13
[INFO] [stderr]     |
[INFO] [stderr] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:207:33
[INFO] [stderr]     |
[INFO] [stderr] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stderr]     |                           ----^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:229:13
[INFO] [stderr]     |
[INFO] [stderr] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:397:24
[INFO] [stderr]     |
[INFO] [stderr] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stderr]     |                        ----^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:398:25
[INFO] [stderr]     |
[INFO] [stderr] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stderr]     |                         ----^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:504:13
[INFO] [stderr]     |
[INFO] [stderr] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:569:24
[INFO] [stderr]     |
[INFO] [stderr] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stderr]     |                        ----^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:570:25
[INFO] [stderr]     |
[INFO] [stderr] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stderr]     |                         ----^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/engine/page.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 |             for i in offset..end {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stderr]    --> src/engine/btnode.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 152 | /     pub fn remove(
[INFO] [stderr] 153 | |         mut self,
[INFO] [stderr] 154 | |         key: &K,
[INFO] [stderr] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stderr] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stderr] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stderr] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stderr]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stderr]     |
[INFO] [stderr] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stderr]    --> src/engine/btnode.rs:239:1
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stderr]    --> src/engine/btnode.rs:385:5
[INFO] [stderr]     |
[INFO] [stderr] 385 | /     pub fn remove<V>(
[INFO] [stderr] 386 | |         mut self,
[INFO] [stderr] 387 | |         key: &K,
[INFO] [stderr] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stderr] ...   |
[INFO] [stderr] 392 | |     where
[INFO] [stderr] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stderr]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stderr]     |
[INFO] [stderr] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stderr]    --> src/engine/btnode.rs:239:1
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stderr]    --> src/engine/btnode.rs:411:5
[INFO] [stderr]     |
[INFO] [stderr] 411 | /     pub fn remove_page<V>(
[INFO] [stderr] 412 | |         &mut self,
[INFO] [stderr] 413 | |         page_ptr: PagePtr,
[INFO] [stderr] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stderr] ...   |
[INFO] [stderr] 418 | |     where
[INFO] [stderr] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stderr]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stderr]     |
[INFO] [stderr] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stderr]    --> src/engine/btnode.rs:239:1
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `get`, `set`, and `remove` are never used
[INFO] [stderr]   --> src/engine/mod.rs:9:8
[INFO] [stderr]    |
[INFO] [stderr] 8  | pub trait KVStoreEngine<K,V> {
[INFO] [stderr]    |           ------------- methods in this trait
[INFO] [stderr] 9  |     fn get(&self, key: &K) -> Result<V>;
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 10 |     fn set(&mut self, key: K, value: V) -> Result<()>;
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 11 |     fn remove(&mut self, key: &K) -> Result<()>;
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/engine/array.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 28 | impl<K: PartialEq,V> ArrayKVStore<K,V> {
[INFO] [stderr]    | -------------------------------------- associated function in this implementation
[INFO] [stderr] 29 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BPTree` is never constructed
[INFO] [stderr]   --> src/engine/bptree.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub struct BPTree<K,V> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/bptree.rs:30:12
[INFO] [stderr]     |
[INFO] [stderr] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stderr] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stderr] 29  |   {
[INFO] [stderr] 30  |       pub fn new<P: AsRef<Path>>(path: P, override_max_key_count: Option<u64>) -> Result<Self>{
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 57  |       pub fn set(&mut self, key: K, value: V) -> Result<()> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 71  |       pub fn get(&mut self, key: K) -> Result<V> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 87  |       pub fn remove(&mut self, key: &K) -> Result<()> {
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 98  |       pub fn max_key_count(&self) -> u64 {
[INFO] [stderr]     |              ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 102 |       pub fn split_at(&self) -> usize {
[INFO] [stderr]     |              ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 106 |       pub fn next_page_ptr(&mut self) -> PagePtr {
[INFO] [stderr]     |              ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 112 |       fn create_root_node(&mut self) -> Node<K,V> {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 117 |       fn create_new_root(&mut self, key: K, new_page_ptr: PagePtr) -> Result<()> {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stderr]     |          ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 132 |       pub fn get_pager(&mut self) -> &mut Pager {
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 136 |       pub fn set_root(&mut self, new_root_ptr: Option<PagePtr>) {
[INFO] [stderr]     |              ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 140 |       pub fn delete_page(&mut self, ptr: PagePtr){
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 144 |       pub fn print_deleted(&self) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `LEAF_NODE_TYPE` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 | const LEAF_NODE_TYPE: u8 = 0;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `INNER_NODE_TYPE` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 | const INNER_NODE_TYPE: u8 = 1;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `PAGE_PTR_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 | const PAGE_PTR_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `KEYS_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:14:7
[INFO] [stderr]    |
[INFO] [stderr] 14 | const KEYS_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `VALUES_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:15:7
[INFO] [stderr]    |
[INFO] [stderr] 15 | const VALUES_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `CHILD_PTRS_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:16:7
[INFO] [stderr]    |
[INFO] [stderr] 16 | const CHILD_PTRS_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `PAGE_PTR_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:18:7
[INFO] [stderr]    |
[INFO] [stderr] 18 | const PAGE_PTR_OFFSET: usize = 0;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `NODE_TYPE_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:19:7
[INFO] [stderr]    |
[INFO] [stderr] 19 | const NODE_TYPE_OFFSET: usize = PAGE_PTR_LEN; //8
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `HAS_NEXT_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:20:7
[INFO] [stderr]    |
[INFO] [stderr] 20 | const HAS_NEXT_OFFSET: usize = PAGE_PTR_LEN + 1; //9
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `NEXT_PAGE_PTR_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:21:7
[INFO] [stderr]    |
[INFO] [stderr] 21 | const NEXT_PAGE_PTR_OFFSET: usize = HAS_NEXT_OFFSET + 1;//10
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `KEYS_LEN_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:22:7
[INFO] [stderr]    |
[INFO] [stderr] 22 | const KEYS_LEN_OFFSET: usize = NEXT_PAGE_PTR_OFFSET + PAGE_PTR_LEN;//18
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `VALUES_LEN_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:23:7
[INFO] [stderr]    |
[INFO] [stderr] 23 | const VALUES_LEN_OFFSET: usize = KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `CHILD_PTRS_LEN_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:24:7
[INFO] [stderr]    |
[INFO] [stderr] 24 | const CHILD_PTRS_LEN_OFFSET: usize =  KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LeafNode` is never constructed
[INFO] [stderr]   --> src/engine/btnode.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub struct LeafNode<K, V>
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `LeafNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/btnode.rs:41:12
[INFO] [stderr]     |
[INFO] [stderr] 37  | / impl<K, V> LeafNode<K, V>
[INFO] [stderr] 38  | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 39  | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stderr]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stderr] 40  |   {
[INFO] [stderr] 41  |       pub fn new(page_ptr: PagePtr) -> Self{
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 50  |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 59  |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 92  |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 113 |       pub fn get(&self, key: &K) -> Option<V>{
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 120 |       fn insert(&mut self, i: usize, key: K, value: V) {
[INFO] [stderr]     |          ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |       pub fn set(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 152 |       pub fn remove(
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 223 |       pub fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stderr]     |              ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 227 |       pub fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stderr]     |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ChildNodeInfo` is never constructed
[INFO] [stderr]    --> src/engine/btnode.rs:239:8
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `InnerNode` is never constructed
[INFO] [stderr]    --> src/engine/btnode.rs:249:12
[INFO] [stderr]     |
[INFO] [stderr] 249 | pub struct InnerNode<K>
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `InnerNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/btnode.rs:259:12
[INFO] [stderr]     |
[INFO] [stderr] 256 | / impl<K> InnerNode<K>
[INFO] [stderr] 257 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stderr]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stderr] 258 |   {
[INFO] [stderr] 259 |       pub fn new(page_ptr: PagePtr) -> Self {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 267 |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 274 |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 303 |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 318 |       pub fn get(&self, key: &K) -> PagePtr {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 325 |       pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 360 |       fn get_child_node_info(&self, key: &K) -> ChildNodeInfo {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 385 |       pub fn remove<V>(
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 411 |       pub fn remove_page<V>(
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 498 |       fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stderr]     |          ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 502 |       fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 510 |       fn insert(&mut self, i: usize, key: K, value: PagePtr) {
[INFO] [stderr]     |          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Node` is never used
[INFO] [stderr]    --> src/engine/btnode.rs:517:10
[INFO] [stderr]     |
[INFO] [stderr] 517 | pub enum Node<K, V> {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/btnode.rs:526:12
[INFO] [stderr]     |
[INFO] [stderr] 522 | / impl<K, V> Node<K, V>
[INFO] [stderr] 523 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 524 | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stderr]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stderr] 525 |   {
[INFO] [stderr] 526 |       pub fn store_node(self, pager: &mut Pager) -> Result<()>{
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 534 |       pub fn load_node(page_ptr: PagePtr, pager: &mut Pager) ->Result<Self> {
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 543 |       pub fn get(self, key: &K, pager: &mut Pager) -> Result<Option<V>> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 560 |       pub fn set(self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K,PagePtr)>> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 567 |       pub fn remove(self, key: &K, bptree: &mut BPTree<K, V>) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 574 |       pub fn new_leaf(ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self{
[INFO] [stderr]     |              ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 578 |       pub fn new_inner(ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `PagePtr` is never used
[INFO] [stderr]  --> src/engine/page.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub type PagePtr = u64;
[INFO] [stderr]   |          ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `PAGE_SIZE` is never used
[INFO] [stderr]  --> src/engine/page.rs:9:11
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stderr]   |           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `max_key_count` is never used
[INFO] [stderr]   --> src/engine/page.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn max_key_count(size_key: u64, size_value: u64) -> u64 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `split_at` is never used
[INFO] [stderr]   --> src/engine/page.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn split_at(max_key_count: u64) -> usize {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Page` is never constructed
[INFO] [stderr]   --> src/engine/page.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Page{
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `from_bytes`, `write_bytes_at_offset`, `get_bytes_from_offset`, `get_page_data`, and `get_page_byte` are never used
[INFO] [stderr]   --> src/engine/page.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl Page{
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 24 |     pub fn new() -> Self{
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 30 |     pub fn from_bytes(bytes: [u8; PAGE_SIZE]) -> Self {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 60 |     pub fn get_page_data(&self) -> [u8; PAGE_SIZE] {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 64 |     pub fn get_page_byte(&self, pos: usize) -> u8 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pager` is never constructed
[INFO] [stderr]   --> src/engine/page.rs:70:12
[INFO] [stderr]    |
[INFO] [stderr] 70 | pub struct Pager {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `open`, `load_page`, `insert_page`, and `append_page` are never used
[INFO] [stderr]    --> src/engine/page.rs:75:12
[INFO] [stderr]     |
[INFO] [stderr] 74  | impl Pager{
[INFO] [stderr]     | ---------- associated items in this implementation
[INFO] [stderr] 75  |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self>{
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 85  |     pub fn load_page(&mut self, page_ptr: PagePtr) -> Result<Page> {
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 101 |     pub fn insert_page(&mut self, page_ptr: PagePtr, page: &Page) -> Result<()>{
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 115 |     pub fn append_page(&mut self, page: &Page) -> Result<()> {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `PageSizeNotEnough`, `PageNotFound`, `UnkonwNodeType`, and `RootPageIsNull` are never constructed
[INFO] [stderr]   --> src/error.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr] 5  | pub enum Error{
[INFO] [stderr]    |          ----- variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 9  |     PageSizeNotEnough,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 10 |     #[error("Page not found")]
[INFO] [stderr] 11 |     PageNotFound,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 17 |     UnkonwNodeType,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 18 |     #[error("roo page ptr is null ")]
[INFO] [stderr] 19 |     RootPageIsNull
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: crate `KVStore` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = help: convert the identifier to snake case: `kvstore`
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/engine/array.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |             self.inner[pos].setvalue(value);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]   --> src/engine/array.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |     use std::collections::HashMap;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/engine/bptree.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                       ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p1`
[INFO] [stderr]    --> src/engine/btnode.rs:603:13
[INFO] [stderr]     |
[INFO] [stderr] 603 |         let p1 = 15;
[INFO] [stderr]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p2`
[INFO] [stderr]    --> src/engine/btnode.rs:604:13
[INFO] [stderr]     |
[INFO] [stderr] 604 |         let p2 = 17;
[INFO] [stderr]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/engine/btnode.rs:616:21
[INFO] [stderr]     |
[INFO] [stderr] 616 |                 Err(e) => {println!("{} is removed", i)}
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `key_size` and `value_size` are never read
[INFO] [stderr]   --> src/engine/bptree.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub struct BPTree<K,V> {
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 17 |     key_size: u64,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 18 |     value_size: u64,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `open` and `load_root` are never used
[INFO] [stderr]    --> src/engine/bptree.rs:53:12
[INFO] [stderr]     |
[INFO] [stderr] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stderr] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stderr]     |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `write_bytes_at_offset`, and `get_bytes_from_offset` are never used
[INFO] [stderr]   --> src/engine/page.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl Page{
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 24 |     pub fn new() -> Self{
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `PageSizeNotEnough` is never constructed
[INFO] [stderr]  --> src/error.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub enum Error{
[INFO] [stderr]   |          ----- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 9 |     PageSizeNotEnough,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/engine/array.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 |         kvengine.set(1,2);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 84 |         let _ = kvengine.set(1,2);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/engine/btnode.rs:593:13
[INFO] [stderr]     |
[INFO] [stderr] 593 |             bptree.set(i, i*10);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 593 |             let _ = bptree.set(i, i*10);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `KVStore` (lib) generated 55 warnings (run `cargo fix --lib -p KVStore` to apply 15 suggestions)
[INFO] [stderr] warning: `KVStore` (lib test) generated 31 warnings (20 duplicates) (run `cargo fix --lib -p KVStore --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/KVStore-45f6a9e89226b191)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test engine::array::tests::test_kv2 ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test engine::btnode::test::test_node ... FAILED
[INFO] [stdout] test engine::array::tests::test_kv ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- engine::btnode::test::test_node stdout ----
[INFO] [stdout] Error: IOError(Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" })
[INFO] [stdout] 
[INFO] [stdout] ---- engine::array::tests::test_kv stdout ----
[INFO] [stdout] thread 'engine::array::tests::test_kv' panicked at src/engine/array.rs:86:37:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: KeyNotFound
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55e365488985 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x55e365488985 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55e365488985 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55e365488985 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55e3654af72b - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x55e3654af72b - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x55e3654861bf - std::io::Write::write_fmt::h8d0c47c662cad79c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x55e36548875e - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55e36548875e - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55e36548a189 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x55e365489e4e - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x55e3654583ba - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x55e3654583ba - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x55e36548a78b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x55e36548a78b - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x55e36548a504 - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x55e365488e49 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55e36548a237 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x55e3654018b3 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55e365401d06 - core::result::unwrap_failed::h382691b96ca8c13a
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/result.rs:1654:5
[INFO] [stdout]   20:     0x55e365414332 - core::result::Result<T,E>::unwrap::h81318be15e6d1aeb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55e365414332 - KVStore::engine::array::tests::test_kv::h8e37586739a93275
[INFO] [stdout]                                at /opt/rustwide/workdir/src/engine/array.rs:86:20
[INFO] [stdout]   22:     0x55e365414117 - KVStore::engine::array::tests::test_kv::{{closure}}::h166a5229b56767c1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/engine/array.rs:82:17
[INFO] [stdout]   23:     0x55e36540ed46 - core::ops::function::FnOnce::call_once::h75e34dcc482e41cc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55e36545cd9b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55e36545cd9b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stdout]   26:     0x55e36545c4a1 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stdout]   27:     0x55e36545c4a1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x55e36545c4a1 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   29:     0x55e36545c4a1 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   30:     0x55e36545c4a1 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   31:     0x55e36545c4a1 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stdout]   32:     0x55e36545c4a1 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stdout]   33:     0x55e365424e64 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stdout]   34:     0x55e365424e64 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x55e365429892 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   36:     0x55e365429892 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x55e365429892 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   38:     0x55e365429892 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   39:     0x55e365429892 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   40:     0x55e365429892 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   41:     0x55e365429892 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55e36548e97b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   43:     0x55e36548e97b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   44:     0x55e36548e97b - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f644ff6cac3 - <unknown>
[INFO] [stdout]   46:     0x7f644fffda04 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     engine::array::tests::test_kv
[INFO] [stdout]     engine::btnode::test::test_node
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "576e11f9061ec005ffd383a2ed94f660a11c7551dc9104694c66a054d1a2ad23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "576e11f9061ec005ffd383a2ed94f660a11c7551dc9104694c66a054d1a2ad23", kill_on_drop: false }`
[INFO] [stdout] 576e11f9061ec005ffd383a2ed94f660a11c7551dc9104694c66a054d1a2ad23
[INFO] testing RyuAlize/KVStore against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyuAlize%2FKVStore" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/RyuAlize/KVStore on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/RyuAlize/KVStore
[INFO] finished tweaking git repo https://github.com/RyuAlize/KVStore
[INFO] tweaked toml for git repo https://github.com/RyuAlize/KVStore written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/RyuAlize/KVStore 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" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5385833a0087016c36f0f6d58b0d4b12842ca548649564570506091f8eccfc1e
[INFO] running `Command { std: "docker" "start" "-a" "5385833a0087016c36f0f6d58b0d4b12842ca548649564570506091f8eccfc1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5385833a0087016c36f0f6d58b0d4b12842ca548649564570506091f8eccfc1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5385833a0087016c36f0f6d58b0d4b12842ca548649564570506091f8eccfc1e", kill_on_drop: false }`
[INFO] [stdout] 5385833a0087016c36f0f6d58b0d4b12842ca548649564570506091f8eccfc1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8bf40c920670d3b444d0889cd3cfb330270b016a068305afb4eca6c9044627d
[INFO] running `Command { std: "docker" "start" "-a" "b8bf40c920670d3b444d0889cd3cfb330270b016a068305afb4eca6c9044627d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling KVStore v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/bptree.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stdout]   --> src/engine/bptree.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stdout]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]  --> src/engine/btnode.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stdout]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryFrom`
[INFO] [stdout]  --> src/engine/btnode.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/engine/btnode.rs:325:85
[INFO] [stdout]     |
[INFO] [stdout] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |                                                                                     ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/page.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/engine/bptree.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/bptree.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut root_node;
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/bptree.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:207:33
[INFO] [stdout]     |
[INFO] [stdout] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:397:24
[INFO] [stdout]     |
[INFO] [stdout] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:504:13
[INFO] [stdout]     |
[INFO] [stdout] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:569:24
[INFO] [stdout]     |
[INFO] [stdout] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:570:25
[INFO] [stdout]     |
[INFO] [stdout] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/engine/page.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             for i in offset..end {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     pub fn remove(
[INFO] [stdout] 153 | |         mut self,
[INFO] [stdout] 154 | |         key: &K,
[INFO] [stdout] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stdout] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stdout] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 | /     pub fn remove<V>(
[INFO] [stdout] 386 | |         mut self,
[INFO] [stdout] 387 | |         key: &K,
[INFO] [stdout] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 392 | |     where
[INFO] [stdout] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stdout]    --> src/engine/btnode.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 | /     pub fn remove_page<V>(
[INFO] [stdout] 412 | |         &mut self,
[INFO] [stdout] 413 | |         page_ptr: PagePtr,
[INFO] [stdout] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | |     where
[INFO] [stdout] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get`, `set`, and `remove` are never used
[INFO] [stdout]   --> src/engine/mod.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub trait KVStoreEngine<K,V> {
[INFO] [stdout]    |           ------------- methods in this trait
[INFO] [stdout] 9  |     fn get(&self, key: &K) -> Result<V>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 10 |     fn set(&mut self, key: K, value: V) -> Result<()>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 11 |     fn remove(&mut self, key: &K) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/engine/array.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<K: PartialEq,V> ArrayKVStore<K,V> {
[INFO] [stdout]    | -------------------------------------- associated function in this implementation
[INFO] [stdout] 29 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BPTree` is never constructed
[INFO] [stdout]   --> src/engine/bptree.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BPTree<K,V> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/bptree.rs:30:12
[INFO] [stdout]     |
[INFO] [stdout] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stdout] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stdout] 29  |   {
[INFO] [stdout] 30  |       pub fn new<P: AsRef<Path>>(path: P, override_max_key_count: Option<u64>) -> Result<Self>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57  |       pub fn set(&mut self, key: K, value: V) -> Result<()> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 71  |       pub fn get(&mut self, key: K) -> Result<V> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |       pub fn remove(&mut self, key: &K) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98  |       pub fn max_key_count(&self) -> u64 {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |       pub fn split_at(&self) -> usize {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |       pub fn next_page_ptr(&mut self) -> PagePtr {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |       fn create_root_node(&mut self) -> Node<K,V> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |       fn create_new_root(&mut self, key: K, new_page_ptr: PagePtr) -> Result<()> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 132 |       pub fn get_pager(&mut self) -> &mut Pager {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 136 |       pub fn set_root(&mut self, new_root_ptr: Option<PagePtr>) {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |       pub fn delete_page(&mut self, ptr: PagePtr){
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |       pub fn print_deleted(&self) {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LEAF_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const LEAF_NODE_TYPE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INNER_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const INNER_NODE_TYPE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const PAGE_PTR_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const KEYS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const VALUES_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const CHILD_PTRS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const PAGE_PTR_OFFSET: usize = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_TYPE_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const NODE_TYPE_OFFSET: usize = PAGE_PTR_LEN; //8
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HAS_NEXT_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const HAS_NEXT_OFFSET: usize = PAGE_PTR_LEN + 1; //9
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NEXT_PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const NEXT_PAGE_PTR_OFFSET: usize = HAS_NEXT_OFFSET + 1;//10
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const KEYS_LEN_OFFSET: usize = NEXT_PAGE_PTR_OFFSET + PAGE_PTR_LEN;//18
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 | const VALUES_LEN_OFFSET: usize = KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | const CHILD_PTRS_LEN_OFFSET: usize =  KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LeafNode` is never constructed
[INFO] [stdout]   --> src/engine/btnode.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct LeafNode<K, V>
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LeafNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:41:12
[INFO] [stdout]     |
[INFO] [stdout] 37  | / impl<K, V> LeafNode<K, V>
[INFO] [stdout] 38  | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 39  | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 40  |   {
[INFO] [stdout] 41  |       pub fn new(page_ptr: PagePtr) -> Self{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59  |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |       pub fn get(&self, key: &K) -> Option<V>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |       fn insert(&mut self, i: usize, key: K, value: V) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       pub fn set(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |       pub fn remove(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |       pub fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 227 |       pub fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChildNodeInfo` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:239:8
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InnerNode` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:249:12
[INFO] [stdout]     |
[INFO] [stdout] 249 | pub struct InnerNode<K>
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InnerNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:259:12
[INFO] [stdout]     |
[INFO] [stdout] 256 | / impl<K> InnerNode<K>
[INFO] [stdout] 257 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 258 |   {
[INFO] [stdout] 259 |       pub fn new(page_ptr: PagePtr) -> Self {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 267 |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 274 |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 303 |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 318 |       pub fn get(&self, key: &K) -> PagePtr {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |       pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 360 |       fn get_child_node_info(&self, key: &K) -> ChildNodeInfo {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 385 |       pub fn remove<V>(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 411 |       pub fn remove_page<V>(
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 498 |       fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 502 |       fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 510 |       fn insert(&mut self, i: usize, key: K, value: PagePtr) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Node` is never used
[INFO] [stdout]    --> src/engine/btnode.rs:517:10
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub enum Node<K, V> {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:526:12
[INFO] [stdout]     |
[INFO] [stdout] 522 | / impl<K, V> Node<K, V>
[INFO] [stdout] 523 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 524 | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 525 |   {
[INFO] [stdout] 526 |       pub fn store_node(self, pager: &mut Pager) -> Result<()>{
[INFO] [stdout]     |              ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 534 |       pub fn load_node(page_ptr: PagePtr, pager: &mut Pager) ->Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 543 |       pub fn get(self, key: &K, pager: &mut Pager) -> Result<Option<V>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 560 |       pub fn set(self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K,PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 567 |       pub fn remove(self, key: &K, bptree: &mut BPTree<K, V>) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 |       pub fn new_leaf(ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self{
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 578 |       pub fn new_inner(ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PagePtr` is never used
[INFO] [stdout]  --> src/engine/page.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub type PagePtr = u64;
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/engine/page.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_key_count` is never used
[INFO] [stdout]   --> src/engine/page.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn max_key_count(size_key: u64, size_value: u64) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_at` is never used
[INFO] [stdout]   --> src/engine/page.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn split_at(max_key_count: u64) -> usize {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Page{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `from_bytes`, `write_bytes_at_offset`, `get_bytes_from_offset`, `get_page_data`, and `get_page_byte` are never used
[INFO] [stdout]   --> src/engine/page.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 24 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn from_bytes(bytes: [u8; PAGE_SIZE]) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn get_page_data(&self) -> [u8; PAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn get_page_byte(&self, pos: usize) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pager` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct Pager {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `open`, `load_page`, `insert_page`, and `append_page` are never used
[INFO] [stdout]    --> src/engine/page.rs:75:12
[INFO] [stdout]     |
[INFO] [stdout] 74  | impl Pager{
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 75  |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self>{
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85  |     pub fn load_page(&mut self, page_ptr: PagePtr) -> Result<Page> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     pub fn insert_page(&mut self, page_ptr: PagePtr, page: &Page) -> Result<()>{
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub fn append_page(&mut self, page: &Page) -> Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `PageSizeNotEnough`, `PageNotFound`, `UnkonwNodeType`, and `RootPageIsNull` are never constructed
[INFO] [stdout]   --> src/error.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum Error{
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9  |     PageSizeNotEnough,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     #[error("Page not found")]
[INFO] [stdout] 11 |     PageNotFound,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     UnkonwNodeType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 18 |     #[error("roo page ptr is null ")]
[INFO] [stdout] 19 |     RootPageIsNull
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `KVStore` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `kvstore`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             self.inner[pos].setvalue(value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 55 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.30s
[INFO] running `Command { std: "docker" "inspect" "b8bf40c920670d3b444d0889cd3cfb330270b016a068305afb4eca6c9044627d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8bf40c920670d3b444d0889cd3cfb330270b016a068305afb4eca6c9044627d", kill_on_drop: false }`
[INFO] [stdout] b8bf40c920670d3b444d0889cd3cfb330270b016a068305afb4eca6c9044627d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8921a321c590837c4b25ec9976a410f118413e5d8a0e1bf21ef9c12c4faf411
[INFO] running `Command { std: "docker" "start" "-a" "d8921a321c590837c4b25ec9976a410f118413e5d8a0e1bf21ef9c12c4faf411", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/bptree.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stdout]   --> src/engine/bptree.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stdout]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]  --> src/engine/btnode.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stdout]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryFrom`
[INFO] [stdout]  --> src/engine/btnode.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/engine/btnode.rs:325:85
[INFO] [stdout]     |
[INFO] [stdout] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |                                                                                     ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/page.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/engine/bptree.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/bptree.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut root_node;
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/bptree.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:207:33
[INFO] [stdout]     |
[INFO] [stdout] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:397:24
[INFO] [stdout]     |
[INFO] [stdout] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:504:13
[INFO] [stdout]     |
[INFO] [stdout] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:569:24
[INFO] [stdout]     |
[INFO] [stdout] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:570:25
[INFO] [stdout]     |
[INFO] [stdout] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/engine/page.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             for i in offset..end {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     pub fn remove(
[INFO] [stdout] 153 | |         mut self,
[INFO] [stdout] 154 | |         key: &K,
[INFO] [stdout] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stdout] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stdout] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 | /     pub fn remove<V>(
[INFO] [stdout] 386 | |         mut self,
[INFO] [stdout] 387 | |         key: &K,
[INFO] [stdout] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 392 | |     where
[INFO] [stdout] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stdout]    --> src/engine/btnode.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 | /     pub fn remove_page<V>(
[INFO] [stdout] 412 | |         &mut self,
[INFO] [stdout] 413 | |         page_ptr: PagePtr,
[INFO] [stdout] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | |     where
[INFO] [stdout] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get`, `set`, and `remove` are never used
[INFO] [stdout]   --> src/engine/mod.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub trait KVStoreEngine<K,V> {
[INFO] [stdout]    |           ------------- methods in this trait
[INFO] [stdout] 9  |     fn get(&self, key: &K) -> Result<V>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 10 |     fn set(&mut self, key: K, value: V) -> Result<()>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 11 |     fn remove(&mut self, key: &K) -> Result<()>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/engine/array.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<K: PartialEq,V> ArrayKVStore<K,V> {
[INFO] [stdout]    | -------------------------------------- associated function in this implementation
[INFO] [stdout] 29 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BPTree` is never constructed
[INFO] [stdout]   --> src/engine/bptree.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BPTree<K,V> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/bptree.rs:30:12
[INFO] [stdout]     |
[INFO] [stdout] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stdout] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stdout] 29  |   {
[INFO] [stdout] 30  |       pub fn new<P: AsRef<Path>>(path: P, override_max_key_count: Option<u64>) -> Result<Self>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57  |       pub fn set(&mut self, key: K, value: V) -> Result<()> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 71  |       pub fn get(&mut self, key: K) -> Result<V> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |       pub fn remove(&mut self, key: &K) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98  |       pub fn max_key_count(&self) -> u64 {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |       pub fn split_at(&self) -> usize {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |       pub fn next_page_ptr(&mut self) -> PagePtr {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |       fn create_root_node(&mut self) -> Node<K,V> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |       fn create_new_root(&mut self, key: K, new_page_ptr: PagePtr) -> Result<()> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 132 |       pub fn get_pager(&mut self) -> &mut Pager {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 136 |       pub fn set_root(&mut self, new_root_ptr: Option<PagePtr>) {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |       pub fn delete_page(&mut self, ptr: PagePtr){
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 144 |       pub fn print_deleted(&self) {
[INFO] [stdout]     |              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LEAF_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const LEAF_NODE_TYPE: u8 = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INNER_NODE_TYPE` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const INNER_NODE_TYPE: u8 = 1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const PAGE_PTR_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 | const KEYS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const VALUES_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const CHILD_PTRS_LEN: usize = 8;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const PAGE_PTR_OFFSET: usize = 0;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NODE_TYPE_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const NODE_TYPE_OFFSET: usize = PAGE_PTR_LEN; //8
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HAS_NEXT_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const HAS_NEXT_OFFSET: usize = PAGE_PTR_LEN + 1; //9
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `NEXT_PAGE_PTR_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const NEXT_PAGE_PTR_OFFSET: usize = HAS_NEXT_OFFSET + 1;//10
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `KEYS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const KEYS_LEN_OFFSET: usize = NEXT_PAGE_PTR_OFFSET + PAGE_PTR_LEN;//18
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `VALUES_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:23:7
[INFO] [stdout]    |
[INFO] [stdout] 23 | const VALUES_LEN_OFFSET: usize = KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CHILD_PTRS_LEN_OFFSET` is never used
[INFO] [stdout]   --> src/engine/btnode.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | const CHILD_PTRS_LEN_OFFSET: usize =  KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LeafNode` is never constructed
[INFO] [stdout]   --> src/engine/btnode.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct LeafNode<K, V>
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LeafNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:41:12
[INFO] [stdout]     |
[INFO] [stdout] 37  | / impl<K, V> LeafNode<K, V>
[INFO] [stdout] 38  | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 39  | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 40  |   {
[INFO] [stdout] 41  |       pub fn new(page_ptr: PagePtr) -> Self{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 50  |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59  |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 92  |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |       pub fn get(&self, key: &K) -> Option<V>{
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |       fn insert(&mut self, i: usize, key: K, value: V) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       pub fn set(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |       pub fn remove(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |       pub fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |              ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 227 |       pub fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ChildNodeInfo` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:239:8
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InnerNode` is never constructed
[INFO] [stdout]    --> src/engine/btnode.rs:249:12
[INFO] [stdout]     |
[INFO] [stdout] 249 | pub struct InnerNode<K>
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `InnerNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:259:12
[INFO] [stdout]     |
[INFO] [stdout] 256 | / impl<K> InnerNode<K>
[INFO] [stdout] 257 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 258 |   {
[INFO] [stdout] 259 |       pub fn new(page_ptr: PagePtr) -> Self {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 267 |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 274 |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 303 |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 318 |       pub fn get(&self, key: &K) -> PagePtr {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 325 |       pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 360 |       fn get_child_node_info(&self, key: &K) -> ChildNodeInfo {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 385 |       pub fn remove<V>(
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 411 |       pub fn remove_page<V>(
[INFO] [stdout]     |              ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 498 |       fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 502 |       fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 510 |       fn insert(&mut self, i: usize, key: K, value: PagePtr) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Node` is never used
[INFO] [stdout]    --> src/engine/btnode.rs:517:10
[INFO] [stdout]     |
[INFO] [stdout] 517 | pub enum Node<K, V> {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/engine/btnode.rs:526:12
[INFO] [stdout]     |
[INFO] [stdout] 522 | / impl<K, V> Node<K, V>
[INFO] [stdout] 523 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 524 | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stdout]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stdout] 525 |   {
[INFO] [stdout] 526 |       pub fn store_node(self, pager: &mut Pager) -> Result<()>{
[INFO] [stdout]     |              ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 534 |       pub fn load_node(page_ptr: PagePtr, pager: &mut Pager) ->Result<Self> {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 543 |       pub fn get(self, key: &K, pager: &mut Pager) -> Result<Option<V>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 560 |       pub fn set(self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K,PagePtr)>> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 567 |       pub fn remove(self, key: &K, bptree: &mut BPTree<K, V>) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 574 |       pub fn new_leaf(ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self{
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 578 |       pub fn new_inner(ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PagePtr` is never used
[INFO] [stdout]  --> src/engine/page.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub type PagePtr = u64;
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/engine/page.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `max_key_count` is never used
[INFO] [stdout]   --> src/engine/page.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn max_key_count(size_key: u64, size_value: u64) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_at` is never used
[INFO] [stdout]   --> src/engine/page.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn split_at(max_key_count: u64) -> usize {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Page{
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `from_bytes`, `write_bytes_at_offset`, `get_bytes_from_offset`, `get_page_data`, and `get_page_byte` are never used
[INFO] [stdout]   --> src/engine/page.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 24 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn from_bytes(bytes: [u8; PAGE_SIZE]) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn get_page_data(&self) -> [u8; PAGE_SIZE] {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn get_page_byte(&self, pos: usize) -> u8 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pager` is never constructed
[INFO] [stdout]   --> src/engine/page.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct Pager {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling KVStore v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `open`, `load_page`, `insert_page`, and `append_page` are never used
[INFO] [stdout]    --> src/engine/page.rs:75:12
[INFO] [stdout]     |
[INFO] [stdout] 74  | impl Pager{
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 75  |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self>{
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85  |     pub fn load_page(&mut self, page_ptr: PagePtr) -> Result<Page> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     pub fn insert_page(&mut self, page_ptr: PagePtr, page: &Page) -> Result<()>{
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |     pub fn append_page(&mut self, page: &Page) -> Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `PageSizeNotEnough`, `PageNotFound`, `UnkonwNodeType`, and `RootPageIsNull` are never constructed
[INFO] [stdout]   --> src/error.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 5  | pub enum Error{
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9  |     PageSizeNotEnough,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     #[error("Page not found")]
[INFO] [stdout] 11 |     PageNotFound,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     UnkonwNodeType,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 18 |     #[error("roo page ptr is null ")]
[INFO] [stdout] 19 |     RootPageIsNull
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `KVStore` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `kvstore`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             self.inner[pos].setvalue(value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 55 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/engine/array.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     use std::collections::HashMap;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/bptree.rs:4:23
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stdout]   --> src/engine/bptree.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stdout]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stdout]  --> src/engine/btnode.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stdout]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TryFrom`
[INFO] [stdout]  --> src/engine/btnode.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/engine/btnode.rs:325:85
[INFO] [stdout]     |
[INFO] [stdout] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout]     |                                                                                     ^                    ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stdout] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/engine/page.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{PathBuf, Path};
[INFO] [stdout]   |                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/engine/bptree.rs:53:33
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/engine/bptree.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let mut root_node;
[INFO] [stdout]    |             ----^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/bptree.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:207:33
[INFO] [stdout]     |
[INFO] [stdout] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stdout]     |                           ----^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:229:13
[INFO] [stdout]     |
[INFO] [stdout] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:397:24
[INFO] [stdout]     |
[INFO] [stdout] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:504:13
[INFO] [stdout]     |
[INFO] [stdout] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:569:24
[INFO] [stdout]     |
[INFO] [stdout] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                        ----^^^^^^^^^
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/engine/btnode.rs:570:25
[INFO] [stdout]     |
[INFO] [stdout] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stdout]     |                         ----^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p1`
[INFO] [stdout]    --> src/engine/btnode.rs:603:13
[INFO] [stdout]     |
[INFO] [stdout] 603 |         let p1 = 15;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p2`
[INFO] [stdout]    --> src/engine/btnode.rs:604:13
[INFO] [stdout]     |
[INFO] [stdout] 604 |         let p2 = 17;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/engine/btnode.rs:616:21
[INFO] [stdout]     |
[INFO] [stdout] 616 |                 Err(e) => {println!("{} is removed", i)}
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/engine/page.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             for i in offset..end {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     pub fn remove(
[INFO] [stdout] 153 | |         mut self,
[INFO] [stdout] 154 | |         key: &K,
[INFO] [stdout] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stdout] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stdout] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stdout]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stdout]    --> src/engine/btnode.rs:385:5
[INFO] [stdout]     |
[INFO] [stdout] 385 | /     pub fn remove<V>(
[INFO] [stdout] 386 | |         mut self,
[INFO] [stdout] 387 | |         key: &K,
[INFO] [stdout] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 392 | |     where
[INFO] [stdout] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stdout]    --> src/engine/btnode.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 | /     pub fn remove_page<V>(
[INFO] [stdout] 412 | |         &mut self,
[INFO] [stdout] 413 | |         page_ptr: PagePtr,
[INFO] [stdout] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stdout] ...   |
[INFO] [stdout] 418 | |     where
[INFO] [stdout] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stdout]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stdout]    --> src/engine/btnode.rs:239:1
[INFO] [stdout]     |
[INFO] [stdout] 239 | struct ChildNodeInfo {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key_size` and `value_size` are never read
[INFO] [stdout]   --> src/engine/bptree.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BPTree<K,V> {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |     key_size: u64,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     value_size: u64,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `open` and `load_root` are never used
[INFO] [stdout]    --> src/engine/bptree.rs:53:12
[INFO] [stdout]     |
[INFO] [stdout] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stdout] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stdout]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stdout]     |              ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `write_bytes_at_offset`, and `get_bytes_from_offset` are never used
[INFO] [stdout]   --> src/engine/page.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl Page{
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 24 |     pub fn new() -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `PageSizeNotEnough` is never constructed
[INFO] [stdout]  --> src/error.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Error{
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 9 |     PageSizeNotEnough,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             self.inner[pos].setvalue(value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/engine/array.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |         kvengine.set(1,2);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 84 |         let _ = kvengine.set(1,2);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/engine/btnode.rs:593:13
[INFO] [stdout]     |
[INFO] [stdout] 593 |             bptree.set(i, i*10);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 593 |             let _ = bptree.set(i, i*10);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "d8921a321c590837c4b25ec9976a410f118413e5d8a0e1bf21ef9c12c4faf411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8921a321c590837c4b25ec9976a410f118413e5d8a0e1bf21ef9c12c4faf411", kill_on_drop: false }`
[INFO] [stdout] d8921a321c590837c4b25ec9976a410f118413e5d8a0e1bf21ef9c12c4faf411
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bcb4d18818c0bbd1ab5756c446b5f41c68ca617be02a63656e3829c9ec73d59c
[INFO] running `Command { std: "docker" "start" "-a" "bcb4d18818c0bbd1ab5756c446b5f41c68ca617be02a63656e3829c9ec73d59c", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/engine/bptree.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                       ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `InnerNode`, `LeafNode`
[INFO] [stderr]   --> src/engine/bptree.rs:10:35
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::engine::btnode::{Node, InnerNode, LeafNode};
[INFO] [stderr]    |                                   ^^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Deserializer`, `Serializer`
[INFO] [stderr]  --> src/engine/btnode.rs:3:15
[INFO] [stderr]   |
[INFO] [stderr] 3 | use bincode::{Serializer, Deserializer};
[INFO] [stderr]   |               ^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TryFrom`
[INFO] [stderr]  --> src/engine/btnode.rs:8:20
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::convert::{TryFrom, TryInto};
[INFO] [stderr]   |                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/engine/btnode.rs:325:85
[INFO] [stderr]     |
[INFO] [stderr] 325 |     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stderr]     |                                                                                     ^                    ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 325 -     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stderr] 325 +     pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>>
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/engine/page.rs:3:17
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::path::{PathBuf, Path};
[INFO] [stderr]   |                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]   --> src/engine/bptree.rs:53:33
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]    |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/engine/bptree.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let mut root_node;
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/bptree.rs:120:13
[INFO] [stderr]     |
[INFO] [stderr] 120 |         let mut new_root: Node<K,V> = Node::new_inner(self.root_ptr.unwrap(), &[key], &[old_root_ptr, new_page_ptr]);
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:207:33
[INFO] [stderr]     |
[INFO] [stderr] 207 | ...                   let mut node = LeafNode::new(path_info.rsibling.unwrap())
[INFO] [stderr]     |                           ----^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:229:13
[INFO] [stderr]     |
[INFO] [stderr] 229 |         let mut node = Self::from(next_ptr, &self.keys[split_at..], &self.values[split_at..], self.next);
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:397:24
[INFO] [stderr]     |
[INFO] [stderr] 397 |             Node::Leaf(mut leaf_node) => leaf_node.remove(key, Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stderr]     |                        ----^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:398:25
[INFO] [stderr]     |
[INFO] [stderr] 398 |             Node::Inner(mut inner_node) => inner_node.remove(key,Some(&mut self), Some(&child_info), bptree)?,
[INFO] [stderr]     |                         ----^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:504:13
[INFO] [stderr]     |
[INFO] [stderr] 504 |         let mut node = Self::from(next_ptr, &self.keys[split_at+1..], &self.childptrs[split_at+1..]);
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:569:24
[INFO] [stderr]     |
[INFO] [stderr] 569 |             Self::Leaf(mut leaf_node) => leaf_node.remove(key, None, None, bptree),
[INFO] [stderr]     |                        ----^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/engine/btnode.rs:570:25
[INFO] [stderr]     |
[INFO] [stderr] 570 |             Self::Inner(mut inner_node) => inner_node.remove(key, None, None, bptree),
[INFO] [stderr]     |                         ----^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/engine/page.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 |             for i in offset..end {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: type `ChildNodeInfo` is more private than the item `LeafNode::<K, V>::remove`
[INFO] [stderr]    --> src/engine/btnode.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 152 | /     pub fn remove(
[INFO] [stderr] 153 | |         mut self,
[INFO] [stderr] 154 | |         key: &K,
[INFO] [stderr] 155 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stderr] 156 | |         path_info: Option<&ChildNodeInfo>,
[INFO] [stderr] 157 | |         bptree: &mut BPTree<K, V>,
[INFO] [stderr] 158 | |     ) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stderr]     | |_____________________________________________^ method `LeafNode::<K, V>::remove` is reachable at visibility `pub(engine)`
[INFO] [stderr]     |
[INFO] [stderr] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stderr]    --> src/engine/btnode.rs:239:1
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove`
[INFO] [stderr]    --> src/engine/btnode.rs:385:5
[INFO] [stderr]     |
[INFO] [stderr] 385 | /     pub fn remove<V>(
[INFO] [stderr] 386 | |         mut self,
[INFO] [stderr] 387 | |         key: &K,
[INFO] [stderr] 388 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stderr] ...   |
[INFO] [stderr] 392 | |     where
[INFO] [stderr] 393 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stderr]     | |________________________________________________________________^ method `InnerNode::<K>::remove` is reachable at visibility `pub(engine)`
[INFO] [stderr]     |
[INFO] [stderr] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stderr]    --> src/engine/btnode.rs:239:1
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `ChildNodeInfo` is more private than the item `InnerNode::<K>::remove_page`
[INFO] [stderr]    --> src/engine/btnode.rs:411:5
[INFO] [stderr]     |
[INFO] [stderr] 411 | /     pub fn remove_page<V>(
[INFO] [stderr] 412 | |         &mut self,
[INFO] [stderr] 413 | |         page_ptr: PagePtr,
[INFO] [stderr] 414 | |         parent: Option<&mut InnerNode<K>>,
[INFO] [stderr] ...   |
[INFO] [stderr] 418 | |     where
[INFO] [stderr] 419 | |         V: Debug + Clone + Ord  +  Serialize + DeserializeOwned,
[INFO] [stderr]     | |________________________________________________________________^ method `InnerNode::<K>::remove_page` is reachable at visibility `pub(engine)`
[INFO] [stderr]     |
[INFO] [stderr] note: but type `ChildNodeInfo` is only usable at visibility `pub(self)`
[INFO] [stderr]    --> src/engine/btnode.rs:239:1
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `get`, `set`, and `remove` are never used
[INFO] [stderr]   --> src/engine/mod.rs:9:8
[INFO] [stderr]    |
[INFO] [stderr] 8  | pub trait KVStoreEngine<K,V> {
[INFO] [stderr]    |           ------------- methods in this trait
[INFO] [stderr] 9  |     fn get(&self, key: &K) -> Result<V>;
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 10 |     fn set(&mut self, key: K, value: V) -> Result<()>;
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 11 |     fn remove(&mut self, key: &K) -> Result<()>;
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/engine/array.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 28 | impl<K: PartialEq,V> ArrayKVStore<K,V> {
[INFO] [stderr]    | -------------------------------------- associated function in this implementation
[INFO] [stderr] 29 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `BPTree` is never constructed
[INFO] [stderr]   --> src/engine/bptree.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub struct BPTree<K,V> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/bptree.rs:30:12
[INFO] [stderr]     |
[INFO] [stderr] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stderr] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stderr] 29  |   {
[INFO] [stderr] 30  |       pub fn new<P: AsRef<Path>>(path: P, override_max_key_count: Option<u64>) -> Result<Self>{
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 57  |       pub fn set(&mut self, key: K, value: V) -> Result<()> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 71  |       pub fn get(&mut self, key: K) -> Result<V> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 87  |       pub fn remove(&mut self, key: &K) -> Result<()> {
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 98  |       pub fn max_key_count(&self) -> u64 {
[INFO] [stderr]     |              ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 102 |       pub fn split_at(&self) -> usize {
[INFO] [stderr]     |              ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 106 |       pub fn next_page_ptr(&mut self) -> PagePtr {
[INFO] [stderr]     |              ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 112 |       fn create_root_node(&mut self) -> Node<K,V> {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 117 |       fn create_new_root(&mut self, key: K, new_page_ptr: PagePtr) -> Result<()> {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stderr]     |          ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 132 |       pub fn get_pager(&mut self) -> &mut Pager {
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 136 |       pub fn set_root(&mut self, new_root_ptr: Option<PagePtr>) {
[INFO] [stderr]     |              ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 140 |       pub fn delete_page(&mut self, ptr: PagePtr){
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 144 |       pub fn print_deleted(&self) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `LEAF_NODE_TYPE` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 | const LEAF_NODE_TYPE: u8 = 0;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `INNER_NODE_TYPE` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 | const INNER_NODE_TYPE: u8 = 1;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `PAGE_PTR_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 | const PAGE_PTR_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `KEYS_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:14:7
[INFO] [stderr]    |
[INFO] [stderr] 14 | const KEYS_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `VALUES_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:15:7
[INFO] [stderr]    |
[INFO] [stderr] 15 | const VALUES_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `CHILD_PTRS_LEN` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:16:7
[INFO] [stderr]    |
[INFO] [stderr] 16 | const CHILD_PTRS_LEN: usize = 8;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `PAGE_PTR_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:18:7
[INFO] [stderr]    |
[INFO] [stderr] 18 | const PAGE_PTR_OFFSET: usize = 0;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `NODE_TYPE_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:19:7
[INFO] [stderr]    |
[INFO] [stderr] 19 | const NODE_TYPE_OFFSET: usize = PAGE_PTR_LEN; //8
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `HAS_NEXT_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:20:7
[INFO] [stderr]    |
[INFO] [stderr] 20 | const HAS_NEXT_OFFSET: usize = PAGE_PTR_LEN + 1; //9
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `NEXT_PAGE_PTR_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:21:7
[INFO] [stderr]    |
[INFO] [stderr] 21 | const NEXT_PAGE_PTR_OFFSET: usize = HAS_NEXT_OFFSET + 1;//10
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `KEYS_LEN_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:22:7
[INFO] [stderr]    |
[INFO] [stderr] 22 | const KEYS_LEN_OFFSET: usize = NEXT_PAGE_PTR_OFFSET + PAGE_PTR_LEN;//18
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `VALUES_LEN_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:23:7
[INFO] [stderr]    |
[INFO] [stderr] 23 | const VALUES_LEN_OFFSET: usize = KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `CHILD_PTRS_LEN_OFFSET` is never used
[INFO] [stderr]   --> src/engine/btnode.rs:24:7
[INFO] [stderr]    |
[INFO] [stderr] 24 | const CHILD_PTRS_LEN_OFFSET: usize =  KEYS_LEN_OFFSET + KEYS_LEN;//26
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LeafNode` is never constructed
[INFO] [stderr]   --> src/engine/btnode.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub struct LeafNode<K, V>
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `LeafNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/btnode.rs:41:12
[INFO] [stderr]     |
[INFO] [stderr] 37  | / impl<K, V> LeafNode<K, V>
[INFO] [stderr] 38  | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 39  | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stderr]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stderr] 40  |   {
[INFO] [stderr] 41  |       pub fn new(page_ptr: PagePtr) -> Self{
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 50  |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 59  |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 92  |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 113 |       pub fn get(&self, key: &K) -> Option<V>{
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 120 |       fn insert(&mut self, i: usize, key: K, value: V) {
[INFO] [stderr]     |          ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |       pub fn set(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K, PagePtr)>> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 152 |       pub fn remove(
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 223 |       pub fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stderr]     |              ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 227 |       pub fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stderr]     |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ChildNodeInfo` is never constructed
[INFO] [stderr]    --> src/engine/btnode.rs:239:8
[INFO] [stderr]     |
[INFO] [stderr] 239 | struct ChildNodeInfo {
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `InnerNode` is never constructed
[INFO] [stderr]    --> src/engine/btnode.rs:249:12
[INFO] [stderr]     |
[INFO] [stderr] 249 | pub struct InnerNode<K>
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `InnerNode` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/btnode.rs:259:12
[INFO] [stderr]     |
[INFO] [stderr] 256 | / impl<K> InnerNode<K>
[INFO] [stderr] 257 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stderr]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stderr] 258 |   {
[INFO] [stderr] 259 |       pub fn new(page_ptr: PagePtr) -> Self {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 267 |       pub fn from(page_ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 274 |       pub fn store_node_to_page(&self, pager: &mut Pager) -> Result<()> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 303 |       pub fn load_node_from_page(mut self, page: Page) -> Result<Self> {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 318 |       pub fn get(&self, key: &K) -> PagePtr {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 325 |       pub fn set<V>(&mut self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<(Option<(K, PagePtr)>)>
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 360 |       fn get_child_node_info(&self, key: &K) -> ChildNodeInfo {
[INFO] [stderr]     |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 385 |       pub fn remove<V>(
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 411 |       pub fn remove_page<V>(
[INFO] [stderr]     |              ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 498 |       fn is_full(&self, max_key_cout: u64) -> bool {
[INFO] [stderr]     |          ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 502 |       fn split(&mut self, next_ptr: PagePtr, split_at: usize) -> Result<(K, Self)> {
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 510 |       fn insert(&mut self, i: usize, key: K, value: PagePtr) {
[INFO] [stderr]     |          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Node` is never used
[INFO] [stderr]    --> src/engine/btnode.rs:517:10
[INFO] [stderr]     |
[INFO] [stderr] 517 | pub enum Node<K, V> {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/engine/btnode.rs:526:12
[INFO] [stderr]     |
[INFO] [stderr] 522 | / impl<K, V> Node<K, V>
[INFO] [stderr] 523 | |     where K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 524 | |           V: Debug + Clone + Ord + Serialize + DeserializeOwned
[INFO] [stderr]     | |_______________________________________________________________- associated items in this implementation
[INFO] [stderr] 525 |   {
[INFO] [stderr] 526 |       pub fn store_node(self, pager: &mut Pager) -> Result<()>{
[INFO] [stderr]     |              ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 534 |       pub fn load_node(page_ptr: PagePtr, pager: &mut Pager) ->Result<Self> {
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 543 |       pub fn get(self, key: &K, pager: &mut Pager) -> Result<Option<V>> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 560 |       pub fn set(self, key: K, value: V, bptree: &mut BPTree<K, V>) -> Result<Option<(K,PagePtr)>> {
[INFO] [stderr]     |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 567 |       pub fn remove(self, key: &K, bptree: &mut BPTree<K, V>) -> Result<(Option<V>, Option<PagePtr>)> {
[INFO] [stderr]     |              ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 574 |       pub fn new_leaf(ptr: PagePtr, keys: &[K], entries: &[V], next: Option<PagePtr>) -> Self{
[INFO] [stderr]     |              ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 578 |       pub fn new_inner(ptr: PagePtr, keys: &[K], entries: &[PagePtr]) -> Self {
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `PagePtr` is never used
[INFO] [stderr]  --> src/engine/page.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub type PagePtr = u64;
[INFO] [stderr]   |          ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `PAGE_SIZE` is never used
[INFO] [stderr]  --> src/engine/page.rs:9:11
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stderr]   |           ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `max_key_count` is never used
[INFO] [stderr]   --> src/engine/page.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn max_key_count(size_key: u64, size_value: u64) -> u64 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `split_at` is never used
[INFO] [stderr]   --> src/engine/page.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn split_at(max_key_count: u64) -> usize {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Page` is never constructed
[INFO] [stderr]   --> src/engine/page.rs:19:12
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Page{
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `from_bytes`, `write_bytes_at_offset`, `get_bytes_from_offset`, `get_page_data`, and `get_page_byte` are never used
[INFO] [stderr]   --> src/engine/page.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl Page{
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 24 |     pub fn new() -> Self{
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 30 |     pub fn from_bytes(bytes: [u8; PAGE_SIZE]) -> Self {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 60 |     pub fn get_page_data(&self) -> [u8; PAGE_SIZE] {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 64 |     pub fn get_page_byte(&self, pos: usize) -> u8 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pager` is never constructed
[INFO] [stderr]   --> src/engine/page.rs:70:12
[INFO] [stderr]    |
[INFO] [stderr] 70 | pub struct Pager {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `open`, `load_page`, `insert_page`, and `append_page` are never used
[INFO] [stderr]    --> src/engine/page.rs:75:12
[INFO] [stderr]     |
[INFO] [stderr] 74  | impl Pager{
[INFO] [stderr]     | ---------- associated items in this implementation
[INFO] [stderr] 75  |     pub fn open<P: AsRef<Path>>(path: P) -> Result<Self>{
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 85  |     pub fn load_page(&mut self, page_ptr: PagePtr) -> Result<Page> {
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 101 |     pub fn insert_page(&mut self, page_ptr: PagePtr, page: &Page) -> Result<()>{
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 115 |     pub fn append_page(&mut self, page: &Page) -> Result<()> {
[INFO] [stderr]     |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `PageSizeNotEnough`, `PageNotFound`, `UnkonwNodeType`, and `RootPageIsNull` are never constructed
[INFO] [stderr]   --> src/error.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr] 5  | pub enum Error{
[INFO] [stderr]    |          ----- variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 9  |     PageSizeNotEnough,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 10 |     #[error("Page not found")]
[INFO] [stderr] 11 |     PageNotFound,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 17 |     UnkonwNodeType,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 18 |     #[error("roo page ptr is null ")]
[INFO] [stderr] 19 |     RootPageIsNull
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: crate `KVStore` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = help: convert the identifier to snake case: `kvstore`
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/engine/array.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |             self.inner[pos].setvalue(value);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 54 |             let _ = self.inner[pos].setvalue(value);
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]   --> src/engine/array.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |     use std::collections::HashMap;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PathBuf`
[INFO] [stderr]  --> src/engine/bptree.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                       ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p1`
[INFO] [stderr]    --> src/engine/btnode.rs:603:13
[INFO] [stderr]     |
[INFO] [stderr] 603 |         let p1 = 15;
[INFO] [stderr]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p2`
[INFO] [stderr]    --> src/engine/btnode.rs:604:13
[INFO] [stderr]     |
[INFO] [stderr] 604 |         let p2 = 17;
[INFO] [stderr]     |             ^^ help: if this is intentional, prefix it with an underscore: `_p2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/engine/btnode.rs:616:21
[INFO] [stderr]     |
[INFO] [stderr] 616 |                 Err(e) => {println!("{} is removed", i)}
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `key_size` and `value_size` are never read
[INFO] [stderr]   --> src/engine/bptree.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub struct BPTree<K,V> {
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 17 |     key_size: u64,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 18 |     value_size: u64,
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `open` and `load_root` are never used
[INFO] [stderr]    --> src/engine/bptree.rs:53:12
[INFO] [stderr]     |
[INFO] [stderr] 26  | / impl<K, V> BPTree<K,V>
[INFO] [stderr] 27  | |     where  K: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr] 28  | |            V: Debug + Clone + Ord + Serialize + DeserializeOwned,
[INFO] [stderr]     | |_________________________________________________________________- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 53  |       pub fn open<P: AsRef<Path>>(path: P) -> Result<Self> {
[INFO] [stderr]     |              ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |       fn load_root(&mut self) -> Result<Node<K, V>> {
[INFO] [stderr]     |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `write_bytes_at_offset`, and `get_bytes_from_offset` are never used
[INFO] [stderr]   --> src/engine/page.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 23 | impl Page{
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 24 |     pub fn new() -> Self{
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 36 |     pub fn write_bytes_at_offset(&mut self, offset: usize, value: &[u8]) -> Result<()>{
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |     pub fn get_bytes_from_offset(&self, offset: usize, size: usize) -> Result<&[u8]> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `PageSizeNotEnough` is never constructed
[INFO] [stderr]  --> src/error.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub enum Error{
[INFO] [stderr]   |          ----- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 9 |     PageSizeNotEnough,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/engine/array.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 |         kvengine.set(1,2);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 84 |         let _ = kvengine.set(1,2);
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/engine/btnode.rs:593:13
[INFO] [stderr]     |
[INFO] [stderr] 593 |             bptree.set(i, i*10);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 593 |             let _ = bptree.set(i, i*10);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `KVStore` (lib) generated 55 warnings (run `cargo fix --lib -p KVStore` to apply 15 suggestions)
[INFO] [stderr] warning: `KVStore` (lib test) generated 31 warnings (20 duplicates) (run `cargo fix --lib -p KVStore --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/KVStore-45f6a9e89226b191)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test engine::array::tests::test_kv2 ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test engine::btnode::test::test_node ... FAILED
[INFO] [stdout] test engine::array::tests::test_kv ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- engine::btnode::test::test_node stdout ----
[INFO] [stdout] Error: IOError(Os { code: 30, kind: ReadOnlyFilesystem, message: "Read-only file system" })
[INFO] [stdout] 
[INFO] [stdout] ---- engine::array::tests::test_kv stdout ----
[INFO] [stdout] thread 'engine::array::tests::test_kv' panicked at src/engine/array.rs:86:37:
[INFO] [stdout] called `Result::unwrap()` on an `Err` value: KeyNotFound
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55a5303b09d5 - std::backtrace_rs::backtrace::libunwind::trace::he49dc9a9e3164223
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x55a5303b09d5 - std::backtrace_rs::backtrace::trace_unsynchronized::h3a3e77c68030aa6b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x55a5303b09d5 - std::sys_common::backtrace::_print_fmt::h9479ad2f99afd5d4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x55a5303b09d5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfb01aa1fa3fb1821
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x55a5303d771b - core::fmt::rt::Argument::fmt::h125e56152abbc1c3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x55a5303d771b - core::fmt::write::hb0ab4ff05ccfe741
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x55a5303ae2bf - std::io::Write::write_fmt::hea6336dbf2fa00b8
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x55a5303b07ae - std::sys_common::backtrace::_print::h79ca548f3a2adf4b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x55a5303b07ae - std::sys_common::backtrace::print::h9aebf997b2fea2d3
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x55a5303b2119 - std::panicking::default_hook::{{closure}}::h68a0954af2694526
[INFO] [stdout]   10:     0x55a5303b1e6c - std::panicking::default_hook::h5be50cc6849ffb00
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x55a53038043f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd874405dcbd1d3ed
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x55a53038043f - test::test_main::{{closure}}::h4f26a9df34a84b94
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x55a5303b271b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h00e96d9c62aa9a12
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x55a5303b271b - std::panicking::rust_panic_with_hook::h3c0df6036729334c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x55a5303b2494 - std::panicking::begin_panic_handler::{{closure}}::ha3a21e93c4cfd807
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:664:13
[INFO] [stdout]   16:     0x55a5303b0e99 - std::sys_common::backtrace::__rust_end_short_backtrace::h19508a8f8ae71dc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x55a5303b21c7 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x55a530329893 - core::panicking::panic_fmt::h2ba8af99174d83ea
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x55a530329ce6 - core::result::unwrap_failed::h52f3bbb78b59f71d
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/result.rs:1654:5
[INFO] [stdout]   20:     0x55a5303360c2 - core::result::Result<T,E>::unwrap::hf8745b9baf99cb5c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/result.rs:1077:23
[INFO] [stdout]   21:     0x55a5303360c2 - KVStore::engine::array::tests::test_kv::h97c21499ed1b88f6
[INFO] [stdout]                                at /opt/rustwide/workdir/src/engine/array.rs:86:20
[INFO] [stdout]   22:     0x55a530335ea7 - KVStore::engine::array::tests::test_kv::{{closure}}::hf3d418f808c549f9
[INFO] [stdout]                                at /opt/rustwide/workdir/src/engine/array.rs:82:17
[INFO] [stdout]   23:     0x55a5303317b6 - core::ops::function::FnOnce::call_once::h25140f9ffd91bc85
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55a530384d5b - core::ops::function::FnOnce::call_once::h18c6bf92212b87a4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55a530384d5b - test::__rust_begin_short_backtrace::hdcf0edcfa9080086
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:625:18
[INFO] [stdout]   26:     0x55a530384421 - test::run_test_in_process::{{closure}}::heac2c4eb375d2d10
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:60
[INFO] [stdout]   27:     0x55a530384421 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0289bafc8a1cc004
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x55a530384421 - std::panicking::try::do_call::h5e158f1ad8a5f983
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   29:     0x55a530384421 - std::panicking::try::hea3411d60321c4de
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   30:     0x55a530384421 - std::panic::catch_unwind::hafb7bb18bc47bbc7
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   31:     0x55a530384421 - test::run_test_in_process::h74dd138dc7762d99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:27
[INFO] [stdout]   32:     0x55a530384421 - test::run_test::{{closure}}::h6b390822e63606cf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:569:43
[INFO] [stdout]   33:     0x55a53034cdf4 - test::run_test::{{closure}}::h6e11dba8131d354b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:599:41
[INFO] [stdout]   34:     0x55a53034cdf4 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha71b3541b59bdbbb
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   35:     0x55a5303518c2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hef92127c5ef9e53c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   36:     0x55a5303518c2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h859c109f9d11c92b
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x55a5303518c2 - std::panicking::try::do_call::hbf534c458cd858f0
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stdout]   38:     0x55a5303518c2 - std::panicking::try::h65c18365a7b9ad90
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stdout]   39:     0x55a5303518c2 - std::panic::catch_unwind::h21b25d4c69478c39
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stdout]   40:     0x55a5303518c2 - std::thread::Builder::spawn_unchecked_::{{closure}}::h23335f620275a9bf
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   41:     0x55a5303518c2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb491dc55513e9b7c
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55a5303b68fb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h41b39260afcffdc9
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   43:     0x55a5303b68fb - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6694c8dc6dd010c4
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   44:     0x55a5303b68fb - std::sys::pal::unix::thread::Thread::new::thread_start::hf16038e1c8e19c99
[INFO] [stdout]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7f40e03bcac3 - <unknown>
[INFO] [stdout]   46:     0x7f40e044da04 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     engine::array::tests::test_kv
[INFO] [stdout]     engine::btnode::test::test_node
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "bcb4d18818c0bbd1ab5756c446b5f41c68ca617be02a63656e3829c9ec73d59c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcb4d18818c0bbd1ab5756c446b5f41c68ca617be02a63656e3829c9ec73d59c", kill_on_drop: false }`
[INFO] [stdout] bcb4d18818c0bbd1ab5756c446b5f41c68ca617be02a63656e3829c9ec73d59c
