[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 1.90.0 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyuAlize%2FKVStore" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[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-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/RyuAlize/KVStore on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.32
[INFO] [stderr]   Downloaded syn v1.0.81
[INFO] [stderr]   Downloaded quote v1.0.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed683765da30834ff14ebd0606779ef151581cf6d713b70869476ddfd530c939
[INFO] running `Command { std: "docker" "start" "-a" "ed683765da30834ff14ebd0606779ef151581cf6d713b70869476ddfd530c939", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed683765da30834ff14ebd0606779ef151581cf6d713b70869476ddfd530c939", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed683765da30834ff14ebd0606779ef151581cf6d713b70869476ddfd530c939", kill_on_drop: false }`
[INFO] [stdout] ed683765da30834ff14ebd0606779ef151581cf6d713b70869476ddfd530c939
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eafce7e9e1177fc3957539298550f67f3f0ae406ff0d6f68fbe0219c02485e1c
[INFO] running `Command { std: "docker" "start" "-a" "eafce7e9e1177fc3957539298550f67f3f0ae406ff0d6f68fbe0219c02485e1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[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` and `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` and `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(in crate::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(in crate::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(in crate::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: trait `KVStoreEngine` is never used
[INFO] [stdout]  --> src/engine/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait KVStoreEngine<K,V> {
[INFO] [stdout]   |           ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KVPair` is never constructed
[INFO] [stdout]  --> src/engine/array.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct KVPair<K, V>
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `setvalue` are never used
[INFO] [stdout]   --> src/engine/array.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<K, V> KVPair<K,V> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(key: K, value: V) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn setvalue(&mut self, value: V) -> Result<()> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayKVStore` is never constructed
[INFO] [stdout]   --> src/engine/array.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct ArrayKVStore<K, V>{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `contains` are 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 items in this implementation
[INFO] [stdout] 29 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn contains(&self, key: &K) -> Option<usize> {
[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] 
[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] 
[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: enum `Error` is never used
[INFO] [stdout]  --> src/error.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Error{
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]   --> src/error.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]    |          ^^^^^^
[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]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.56s
[INFO] running `Command { std: "docker" "inspect" "eafce7e9e1177fc3957539298550f67f3f0ae406ff0d6f68fbe0219c02485e1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eafce7e9e1177fc3957539298550f67f3f0ae406ff0d6f68fbe0219c02485e1c", kill_on_drop: false }`
[INFO] [stdout] eafce7e9e1177fc3957539298550f67f3f0ae406ff0d6f68fbe0219c02485e1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83a63ea6b2b34c9abc7116d3f0215c8ca73a61977c8f6494705876c736e7abb2
[INFO] running `Command { std: "docker" "start" "-a" "83a63ea6b2b34c9abc7116d3f0215c8ca73a61977c8f6494705876c736e7abb2", kill_on_drop: false }`
[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` and `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` and `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(in crate::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(in crate::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(in crate::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: trait `KVStoreEngine` is never used
[INFO] [stdout]  --> src/engine/mod.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait KVStoreEngine<K,V> {
[INFO] [stdout]   |           ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KVPair` is never constructed
[INFO] [stdout]  --> src/engine/array.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct KVPair<K, V>
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `setvalue` are never used
[INFO] [stdout]   --> src/engine/array.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<K, V> KVPair<K,V> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn new(key: K, value: V) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn setvalue(&mut self, value: V) -> Result<()> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayKVStore` is never constructed
[INFO] [stdout]   --> src/engine/array.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct ArrayKVStore<K, V>{
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `contains` are 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 items in this implementation
[INFO] [stdout] 29 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn contains(&self, key: &K) -> Option<usize> {
[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] 
[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] 
[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: enum `Error` is never used
[INFO] [stdout]  --> src/error.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Error{
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]   --> src/error.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub type Result<T> = std::result::Result<T, Error>;
[INFO] [stdout]    |          ^^^^^^
[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: 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` and `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` and `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(in crate::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(in crate::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(in crate::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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "83a63ea6b2b34c9abc7116d3f0215c8ca73a61977c8f6494705876c736e7abb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83a63ea6b2b34c9abc7116d3f0215c8ca73a61977c8f6494705876c736e7abb2", kill_on_drop: false }`
[INFO] [stdout] 83a63ea6b2b34c9abc7116d3f0215c8ca73a61977c8f6494705876c736e7abb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 12d0031dddf020534619ff9094000e79d9f8ae81ce8d24cfefc33ce4ec931230
[INFO] running `Command { std: "docker" "start" "-a" "12d0031dddf020534619ff9094000e79d9f8ae81ce8d24cfefc33ce4ec931230", 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` and `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` and `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(in crate::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(in crate::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(in crate::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: trait `KVStoreEngine` is never used
[INFO] [stderr]  --> src/engine/mod.rs:8:11
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub trait KVStoreEngine<K,V> {
[INFO] [stderr]   |           ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `KVPair` is never constructed
[INFO] [stderr]  --> src/engine/array.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct KVPair<K, V>
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `setvalue` are never used
[INFO] [stderr]   --> src/engine/array.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl<K, V> KVPair<K,V> {
[INFO] [stderr]    | ---------------------- associated items in this implementation
[INFO] [stderr] 11 |     pub fn new(key: K, value: V) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 18 |     pub fn setvalue(&mut self, value: V) -> Result<()> {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ArrayKVStore` is never constructed
[INFO] [stderr]   --> src/engine/array.rs:24:12
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub struct ArrayKVStore<K, V>{
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `contains` are 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 items in this implementation
[INFO] [stderr] 29 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 35 |     pub fn contains(&self, key: &K) -> Option<usize> {
[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] 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] 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: enum `Error` is never used
[INFO] [stderr]  --> src/error.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub enum Error{
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Result` is never used
[INFO] [stderr]   --> src/error.rs:22:10
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub type Result<T> = std::result::Result<T, Error>;
[INFO] [stderr]    |          ^^^^^^
[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: `KVStore` (lib) generated 59 warnings (run `cargo fix --lib -p KVStore` to apply 15 suggestions)
[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 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 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/KVStore-e167672c85456390)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test engine::btnode::test::test_node ... FAILED
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test engine::array::tests::test_kv2 ... ok
[INFO] [stdout] test engine::array::tests::test_kv ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[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] 
[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:     0x614fef3a6442 - std::backtrace_rs::backtrace::libunwind::trace::h2d45396358f41939
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x614fef3a6442 - std::backtrace_rs::backtrace::trace_unsynchronized::hffcefc0b67f1d6e2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x614fef3a6442 - std::sys::backtrace::_print_fmt::hd72f71d23b436b92
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x614fef3a6442 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hdcfcb6d4c8489523
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x614fef3cbe03 - core::fmt::rt::Argument::fmt::h2c56b3114963061a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x614fef3cbe03 - core::fmt::write::h8a494366950f23bb
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/fmt/mod.rs:1468:25
[INFO] [stdout]    6:     0x614fef3a33c3 - std::io::default_write_fmt::h7b8824096454f323
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x614fef3a33c3 - std::io::Write::write_fmt::h4e71294925c334d0
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x614fef3a6292 - std::sys::backtrace::BacktraceLock::print::hb2a626a81e06b2dc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x614fef3a79c9 - std::panicking::default_hook::{{closure}}::h4f78485264f12d10
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x614fef3a77fe - std::panicking::default_hook::h2c66fc99e962531d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x614fef36d7e4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb6bd65493727d71a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x614fef36d7e4 - test::test_main_with_exit_callback::{{closure}}::h60217ec76a0ece4a
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x614fef3a849e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h318e4efb8c1a5689
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x614fef3a849e - std::panicking::rust_panic_with_hook::h33ac55f64bbd807d
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x614fef3a816a - std::panicking::begin_panic_handler::{{closure}}::h30e7cb89678a57fe
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x614fef3a6949 - std::sys::backtrace::__rust_end_short_backtrace::hed60f27456c16ced
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:174:18
[INFO] [stdout]   17:     0x614fef3a7dfd - __rustc[de2ca18b4c54d5b8]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x614fef3ca360 - core::panicking::panic_fmt::h62f63d096dd276af
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x614fef3ca726 - core::result::unwrap_failed::h95bc3f5a607b2c95
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1765:5
[INFO] [stdout]   20:     0x614fef3229e7 - core::result::Result<T,E>::unwrap::hfa78cbb770a04bd5
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/result.rs:1167:23
[INFO] [stdout]   21:     0x614fef3229e7 - KVStore::engine::array::tests::test_kv::h38d4d7f5f11d11f1
[INFO] [stdout]                                at /opt/rustwide/workdir/src/engine/array.rs:86:37
[INFO] [stdout]   22:     0x614fef3227b7 - KVStore::engine::array::tests::test_kv::{{closure}}::h5d069121f08be1bc
[INFO] [stdout]                                at /opt/rustwide/workdir/src/engine/array.rs:82:17
[INFO] [stdout]   23:     0x614fef323d56 - core::ops::function::FnOnce::call_once::hd75a4f71b7e30a6e
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   24:     0x614fef37304b - core::ops::function::FnOnce::call_once::h1f9474f1347fff52
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   25:     0x614fef37304b - test::__rust_begin_short_backtrace::ha52ab26e77157f03
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:648:18
[INFO] [stdout]   26:     0x614fef372185 - test::run_test_in_process::{{closure}}::h229c1a11a50b261f
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:74
[INFO] [stdout]   27:     0x614fef372185 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h78821afbf97b39a9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x614fef372185 - std::panicking::catch_unwind::do_call::h53abf3ed5bd32ba3
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x614fef372185 - std::panicking::catch_unwind::h6deb5fe1e91873c9
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x614fef372185 - std::panic::catch_unwind::hea0829b6b565654b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x614fef372185 - test::run_test_in_process::hdc44dfecea3db21b
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:671:27
[INFO] [stdout]   32:     0x614fef372185 - test::run_test::{{closure}}::h0364ba59bf23f652
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:592:43
[INFO] [stdout]   33:     0x614fef335d84 - test::run_test::{{closure}}::h32730b304eec05da
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/test/src/lib.rs:622:41
[INFO] [stdout]   34:     0x614fef335d84 - std::sys::backtrace::__rust_begin_short_backtrace::h177cb952fc54ad2c
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/backtrace.rs:158:18
[INFO] [stdout]   35:     0x614fef33975a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h119d903520007597
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x614fef33975a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hab88401d606702a6
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x614fef33975a - std::panicking::catch_unwind::do_call::h163fe12cca9901c2
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x614fef33975a - std::panicking::catch_unwind::he81557d0e17cc1bc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x614fef33975a - std::panic::catch_unwind::hc2b8e79c20593955
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x614fef33975a - std::thread::Builder::spawn_unchecked_::{{closure}}::hfa6b4978e07815cc
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x614fef33975a - core::ops::function::FnOnce::call_once{{vtable.shim}}::hddcd7484a13fd793
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/core/src/ops/function.rs:253:5
[INFO] [stdout]   42:     0x614fef3ab41f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h5924238c754de3b8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   43:     0x614fef3ab41f - std::sys::pal::unix::thread::Thread::new::thread_start::hb6e99e73da4d28f8
[INFO] [stdout]                                at /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/sys/pal/unix/thread.rs:107:17
[INFO] [stdout]   44:     0x7500f1236aa4 - <unknown>
[INFO] [stdout]   45:     0x7500f12c3a34 - clone
[INFO] [stdout]   46:                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 0.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "12d0031dddf020534619ff9094000e79d9f8ae81ce8d24cfefc33ce4ec931230", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12d0031dddf020534619ff9094000e79d9f8ae81ce8d24cfefc33ce4ec931230", kill_on_drop: false }`
[INFO] [stdout] 12d0031dddf020534619ff9094000e79d9f8ae81ce8d24cfefc33ce4ec931230
