[INFO] cloning repository https://github.com/hiyasame/bplustree-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hiyasame/bplustree-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhiyasame%2Fbplustree-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhiyasame%2Fbplustree-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b84767aa7c12373f25bbd06ecce142fb0d8c282
[INFO] building hiyasame/bplustree-rs against master#ad211ced81509462cdfe4c29ed10f97279a0acae for pr-135216-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhiyasame%2Fbplustree-rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hiyasame/bplustree-rs on toolchain ad211ced81509462cdfe4c29ed10f97279a0acae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hiyasame/bplustree-rs
[INFO] finished tweaking git repo https://github.com/hiyasame/bplustree-rs
[INFO] tweaked toml for git repo https://github.com/hiyasame/bplustree-rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hiyasame/bplustree-rs 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" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded anyhow v1.0.89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b13b6c2348f4ae0ef29acd7479ca63b1e077bc96d35d410960581b4f63e58f0f
[INFO] running `Command { std: "docker" "start" "-a" "b13b6c2348f4ae0ef29acd7479ca63b1e077bc96d35d410960581b4f63e58f0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b13b6c2348f4ae0ef29acd7479ca63b1e077bc96d35d410960581b4f63e58f0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b13b6c2348f4ae0ef29acd7479ca63b1e077bc96d35d410960581b4f63e58f0f", kill_on_drop: false }`
[INFO] [stdout] b13b6c2348f4ae0ef29acd7479ca63b1e077bc96d35d410960581b4f63e58f0f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c53cf023f93d31b24493d94470a793f7f007896655fa40e05cc3949f450c2e7
[INFO] running `Command { std: "docker" "start" "-a" "1c53cf023f93d31b24493d94470a793f7f007896655fa40e05cc3949f450c2e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.89
[INFO] [stderr]    Compiling bplus-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `ret` is never read
[INFO] [stdout]    --> src/tree.rs:233:17
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let mut ret: Option<V> = None;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/tree.rs:231:38
[INFO] [stdout]     |
[INFO] [stdout] 231 |     fn delete_helper(engine: *mut E, parent: &Cell<Option<BlockId>>, block_id: BlockId, key: &K) -> Result<Option<V>> {
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `block_id` is never read
[INFO] [stdout]    --> src/block.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let mut block_id: BlockId = 0;
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BPlusTree` is never constructed
[INFO] [stdout]  --> src/tree.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BPlusTree<K, V, E>
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BPlusTreeNode` is never constructed
[INFO] [stdout]   --> src/tree.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct BPlusTreeNode<K: Ord, V> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `is_leaf`, `new_leaf`, and `new_inner` are never used
[INFO] [stdout]   --> src/tree.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl<K: Ord, V> BPlusTreeNode<K, V> {
[INFO] [stdout]    | ----------------------------------- associated items in this implementation
[INFO] [stdout] 34 |     fn is_leaf(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn new_leaf(way: usize, parent: Option<usize>) -> BPlusTreeNode<K, V> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn new_inner(way: usize) -> BPlusTreeNode<K, V> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/tree.rs:72:12
[INFO] [stdout]     |
[INFO] [stdout] 65  | / impl<K, V, E> BPlusTree<K, V, E>
[INFO] [stdout] 66  | | where
[INFO] [stdout] 67  | |     E: BlockEngine<Item = BPlusTreeNode<K, V>>,
[INFO] [stdout] 68  | |     K: Ord + Clone,
[INFO] [stdout] 69  | |     V: Clone,
[INFO] [stdout]     | |_____________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 72  |       pub fn new(way: usize, mut engine: E) -> BPlusTree<K, V, E> {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 83  |       pub fn search(&self, key: &K) -> Option<V> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87  |       fn search_helper(&self, block_id: BlockId, key: &K) -> Option<V> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |       pub fn insert(&mut self, key: K, value: V) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |       fn insert_helper(
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 221 |       pub fn delete(&mut self, key: &K) -> Result<Option<V>> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 231 |       fn delete_helper(engine: *mut E, parent: &Cell<Option<BlockId>>, block_id: BlockId, key: &K) -> Result<Option<V>> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 261 |       pub fn print_tree(&self) where K : Debug, V : Debug {
[INFO] [stdout]     |              ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 265 |       fn print_tree_helper(&self, block_id: BlockId, depth: usize) where K : Debug, V : Debug {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `alloc_block`, `alloc_write`, `fetch_read`, `fetch_write`, and `delete` are never used
[INFO] [stdout]   --> src/block.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait BlockEngine {
[INFO] [stdout]    |           ----------- methods in this trait
[INFO] [stdout] 16 |     type Item;
[INFO] [stdout] 17 |     fn alloc_block(&mut self) -> BlockId;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 18 |     fn alloc_write(&mut self, item: Self::Item) -> Result<BlockId> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn fetch_read(&self, block_id: BlockId) -> Result<BlockReadGuard<Self::Item>>;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 26 |     fn fetch_write(&mut self, block_id: BlockId) -> Result<BlockWriteGuard<Self::Item>>;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 27 |     fn delete(&mut self, block_id: BlockId) -> Result<Option<Self::Item>>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/block.rs:148:12
[INFO] [stdout]     |
[INFO] [stdout] 147 | impl <B> MemoryBlockEngine<B> {
[INFO] [stdout]     | ----------------------------- associated function in this implementation
[INFO] [stdout] 148 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "1c53cf023f93d31b24493d94470a793f7f007896655fa40e05cc3949f450c2e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c53cf023f93d31b24493d94470a793f7f007896655fa40e05cc3949f450c2e7", kill_on_drop: false }`
[INFO] [stdout] 1c53cf023f93d31b24493d94470a793f7f007896655fa40e05cc3949f450c2e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+ad211ced81509462cdfe4c29ed10f97279a0acae" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ada959c50cdb0aa715b6c2c7fab60d9c5e82fc4e92cc700f1db6d8db2068c8b5
[INFO] running `Command { std: "docker" "start" "-a" "ada959c50cdb0aa715b6c2c7fab60d9c5e82fc4e92cc700f1db6d8db2068c8b5", kill_on_drop: false }`
[INFO] [stderr]    Compiling bplus-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `ret` is never read
[INFO] [stdout]    --> src/tree.rs:233:17
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let mut ret: Option<V> = None;
[INFO] [stdout]     |                 ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parent`
[INFO] [stdout]    --> src/tree.rs:231:38
[INFO] [stdout]     |
[INFO] [stdout] 231 |     fn delete_helper(engine: *mut E, parent: &Cell<Option<BlockId>>, block_id: BlockId, key: &K) -> Result<Option<V>> {
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `block_id` is never read
[INFO] [stdout]    --> src/block.rs:103:17
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let mut block_id: BlockId = 0;
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `way` is never read
[INFO] [stdout]   --> src/tree.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct BPlusTree<K, V, E>
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 11 |     way: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `prev` is never read
[INFO] [stdout]   --> src/tree.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct BPlusTreeNode<K: Ord, V> {
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 26 |     prev: Option<BlockId>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_leaf` is never used
[INFO] [stdout]   --> src/tree.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl<K: Ord, V> BPlusTreeNode<K, V> {
[INFO] [stdout]    | ----------------------------------- method in this implementation
[INFO] [stdout] 34 |     fn is_leaf(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `delete` and `delete_helper` are never used
[INFO] [stdout]    --> src/tree.rs:221:12
[INFO] [stdout]     |
[INFO] [stdout] 65  | / impl<K, V, E> BPlusTree<K, V, E>
[INFO] [stdout] 66  | | where
[INFO] [stdout] 67  | |     E: BlockEngine<Item = BPlusTreeNode<K, V>>,
[INFO] [stdout] 68  | |     K: Ord + Clone,
[INFO] [stdout] 69  | |     V: Clone,
[INFO] [stdout]     | |_____________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 221 |       pub fn delete(&mut self, key: &K) -> Result<Option<V>> {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 231 |       fn delete_helper(engine: *mut E, parent: &Cell<Option<BlockId>>, block_id: BlockId, key: &K) -> Result<Option<V>> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]   --> src/block.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait BlockEngine {
[INFO] [stdout]    |           ----------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn delete(&mut self, block_id: BlockId) -> Result<Option<Self::Item>>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "ada959c50cdb0aa715b6c2c7fab60d9c5e82fc4e92cc700f1db6d8db2068c8b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ada959c50cdb0aa715b6c2c7fab60d9c5e82fc4e92cc700f1db6d8db2068c8b5", kill_on_drop: false }`
[INFO] [stdout] ada959c50cdb0aa715b6c2c7fab60d9c5e82fc4e92cc700f1db6d8db2068c8b5
