[INFO] cloning repository https://github.com/sawlow81wt/mydb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sawlow81wt/mydb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsawlow81wt%2Fmydb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsawlow81wt%2Fmydb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 441c85e44023875315189446e1cb0763ae518f69
[INFO] checking sawlow81wt/mydb against 895980e0290783bb09b1ccf1b11f14eb09b10430 for pr-160186
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsawlow81wt%2Fmydb" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sawlow81wt/mydb
[INFO] finished tweaking git repo https://github.com/sawlow81wt/mydb
[INFO] tweaked toml for git repo https://github.com/sawlow81wt/mydb written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sawlow81wt/mydb on toolchain 895980e0290783bb09b1ccf1b11f14eb09b10430
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sawlow81wt/mydb 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" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6
[INFO] running `Command { std: "docker" "start" "36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6" "/opt/rustwide/cargo-home/bin/cargo" "+895980e0290783bb09b1ccf1b11f14eb09b10430" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking mydb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `RwLock`
[INFO] [stdout]  --> src/transaction/lock_table.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> src/transaction/log_record.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log_manager::LogManager`
[INFO] [stdout]  --> src/transaction/log_record.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     log_manager::LogManager,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::transaction::Transaction`
[INFO] [stdout]  --> src/transaction/log_record.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::transaction::Transaction;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LogRecordTrait` and `transaction::Transaction`
[INFO] [stdout]   --> src/transaction/recovery_manager.rs:10:29
[INFO] [stdout]    |
[INFO] [stdout] 10 |     log_record::{LogRecord, LogRecordTrait},
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^
[INFO] [stdout] 11 |     transaction::Transaction,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RwLock`
[INFO] [stdout]  --> src/transaction/lock_table.rs:2:29
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::{Arc, Mutex, RwLock};
[INFO] [stdout]   |                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]  --> src/transaction/log_record.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log_manager::LogManager`
[INFO] [stdout]  --> src/transaction/log_record.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     log_manager::LogManager,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::transaction::Transaction`
[INFO] [stdout]  --> src/transaction/log_record.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::transaction::Transaction;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LogRecordTrait` and `transaction::Transaction`
[INFO] [stdout]   --> src/transaction/recovery_manager.rs:10:29
[INFO] [stdout]    |
[INFO] [stdout] 10 |     log_record::{LogRecord, LogRecordTrait},
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^
[INFO] [stdout] 11 |     transaction::Transaction,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/transaction/log_record.rs:222:13
[INFO] [stdout]     |
[INFO] [stdout] 222 |             _ => {
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/transaction/log_record.rs:222:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |             LogRecordType::CheckPoint => {
[INFO] [stdout]     |             ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 152 |             LogRecordType::Start => {
[INFO] [stdout]     |             -------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 158 |             LogRecordType::Commit => {
[INFO] [stdout]     |             --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 164 |             LogRecordType::Rollback => {
[INFO] [stdout]     |             ----------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 222 |             _ => {
[INFO] [stdout]     |             ^ ...and 2 other patterns collectively make this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/transaction/log_record.rs:283:13
[INFO] [stdout]     |
[INFO] [stdout] 283 |             _ => todo!(),
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/transaction/log_record.rs:283:13
[INFO] [stdout]     |
[INFO] [stdout] 232 | /             LogRecord::CheckPoint(record)
[INFO] [stdout] 233 | |             | LogRecord::Commit(record)
[INFO] [stdout] 234 | |             | LogRecord::Start(record)
[INFO] [stdout] 235 | |             | LogRecord::Rollback(record) => {
[INFO] [stdout]     | |_________________________________________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 246 |               LogRecord::SetInt(record) => {
[INFO] [stdout]     |               ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 264 |               LogRecord::SetString(record) => {
[INFO] [stdout]     |               ---------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 283 |               _ => todo!(),
[INFO] [stdout]     |               ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `record`
[INFO] [stdout]    --> src/transaction/transaction.rs:188:35
[INFO] [stdout]     |
[INFO] [stdout] 188 |             LogRecord::CheckPoint(record)
[INFO] [stdout]     |                                   ^^^^^^
[INFO] [stdout] 189 |             | LogRecord::Commit(record)
[INFO] [stdout]     |                                 ^^^^^^
[INFO] [stdout] 190 |             | LogRecord::Start(record)
[INFO] [stdout]     |                                ^^^^^^
[INFO] [stdout] 191 |             | LogRecord::Rollback(record) => {
[INFO] [stdout]     |                                   ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 188 ~             LogRecord::CheckPoint(_record)
[INFO] [stdout] 189 ~             | LogRecord::Commit(_record)
[INFO] [stdout] 190 ~             | LogRecord::Start(_record)
[INFO] [stdout] 191 ~             | LogRecord::Rollback(_record) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_TIME` is never used
[INFO] [stdout]   --> src/buffer_manager.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const MAX_TIME: i32 = 10000;
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BufferAbortError` is never used
[INFO] [stdout]   --> src/buffer_manager.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub enum BufferAbortError {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Buffer` is never constructed
[INFO] [stdout]   --> src/buffer_manager.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Buffer {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/buffer_manager.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl Buffer {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 42 |     fn new(block_size: usize) -> Buffer {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn block_id(&self) -> Option<&BlockId> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn set_modified(&mut self, txnum: i32, last_save_number: i32) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn is_pinned(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn modifying_tx(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     fn assign_to_back(&mut self, block_id: BlockId) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     fn flush(&mut self) {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 82 |
[INFO] [stdout] 83 |     fn pin(&mut self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |     fn unpin(&mut self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BufferManager` is never constructed
[INFO] [stdout]   --> src/buffer_manager.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub struct BufferManager {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/buffer_manager.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl BufferManager {
[INFO] [stdout]     | ------------------ associated items in this implementation
[INFO] [stdout] 100 |     pub fn new(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     pub fn available(&self) -> i32 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn flush_all(&mut self, txnum: i32) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 141 |     pub fn unpin(&mut self, buffer: Arc<RwLock<Buffer>>) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     pub fn pin(&mut self, block_id: &BlockId) -> Result<Arc<RwLock<Buffer>>, BufferAbortError> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 155 |     fn try_to_pin(&mut self, block_id: &BlockId) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 167 |     fn find_assignable_block(&self, block_id: &BlockId) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 183 |     fn find_existing_buffer(&self, target_block_id: &BlockId) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 196 |     fn choose_unpinned_buffer(&self) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LockAbortError` is never constructed
[INFO] [stdout]  --> src/error.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct LockAbortError {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/file_manager.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INTGER_BYTES` is never used
[INFO] [stdout]   --> src/file_manager.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub const INTGER_BYTES: usize = 4;
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockId` is never constructed
[INFO] [stdout]   --> src/file_manager.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BlockId {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/file_manager.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl BlockId {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 19 |     fn new(filename: &str, block_number: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]   --> src/file_manager.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Page {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/file_manager.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Page {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 33 |     pub fn new(block_size: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn get_int(&mut self, offset: usize) -> io::Result<i32> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn set_int(&mut self, offset: usize, value: i32) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn get_bytes(&mut self, offset: usize) -> io::Result<Box<[u8]>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn set_bytes(&mut self, offset: usize, value: &[u8]) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn get_string(&mut self, offset: usize) -> io::Result<String> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub fn set_string(&mut self, offset: usize, value: String) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn max_length(strlen: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn contents(&mut self) -> &mut Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileManager` is never constructed
[INFO] [stdout]   --> src/file_manager.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct FileManager {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/file_manager.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl FileManager {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 101 |     pub fn new(directory: String) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     pub fn write(&mut self, block_id: &BlockId, page: &mut Page) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     pub fn read(&mut self, block_id: &BlockId, page: &mut Page) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     fn get_file(&mut self, filename: &String) -> io::Result<File> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |     pub fn length(&mut self, filename: &String) -> anyhow::Result<i32> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 146 |     pub fn append_new_block(&mut self, filename: &String) -> io::Result<BlockId> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 162 |     pub fn last_block_num(&mut self, filename: &String) -> io::Result<usize> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LogManager` is never constructed
[INFO] [stdout]  --> src/log_manager.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct LogManager {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/log_manager.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout]  17 | impl LogManager {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout]  18 |     pub fn new(mut file_manager: FileManager, log_file: String) -> io::Result<Self> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  43 |     pub fn flush_with(&mut self, lsn: i32) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  50 |     pub fn iterator(&mut self) -> io::Result<LogIterator> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  55 |     pub fn append_record(&mut self, log_record: &[u8]) -> io::Result<i32> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  75 |     fn append_new_block(&mut self) -> io::Result<BlockId> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  91 |     fn get_boundary(&mut self) -> i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  95 |     fn set_boundary(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     fn flush(&mut self) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LogIterator` is never constructed
[INFO] [stdout]    --> src/log_manager.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 | pub struct LogIterator {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `move_to_block` are never used
[INFO] [stdout]    --> src/log_manager.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 119 | impl LogIterator {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 120 |     pub fn new(file_manager: Arc<Mutex<FileManager>>, block_id: BlockId) -> io::Result<Self> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn move_to_block(&mut self, block_id: &BlockId) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BufferList` is never constructed
[INFO] [stdout]  --> src/transaction/buffer_list.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct BufferList {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_buffer`, `pin`, `unpin`, and `unpin_all` are never used
[INFO] [stdout]   --> src/transaction/buffer_list.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl BufferList {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 13 |     pub fn new(buffer_manager: Arc<Mutex<BufferManager>>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_buffer(&self, block_id: &BlockId) -> Option<&Arc<RwLock<Buffer>>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn pin(&mut self, block_id: &BlockId) -> anyhow::Result<()> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn unpin(&mut self, block_id: &BlockId) -> anyhow::Result<()> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn unpin_all(&mut self) -> anyhow::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_TIME` is never used
[INFO] [stdout]  --> src/transaction/lock_table.rs:7:7
[INFO] [stdout]   |
[INFO] [stdout] 7 | const MAX_TIME: Duration = Duration::from_secs(10);
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LockTable` is never constructed
[INFO] [stdout]  --> src/transaction/lock_table.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct LockTable {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/transaction/lock_table.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl LockTable {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 22 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     fn slock(&mut self, block_id: &BlockId) -> Result<(), LockAbortError> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     fn xlock(&mut self, block_id: &BlockId) -> Result<(), LockAbortError> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn unlock(&mut self, block_id: &BlockId) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn has_xlock(&self, block_id: &BlockId) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn has_other_slocks(&self, block_id: &BlockId) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     fn get_lock_val(&self, block_id: &BlockId) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConcurrentManager` is never constructed
[INFO] [stdout]   --> src/transaction/lock_table.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub struct ConcurrentManager {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `slock`, `xlock`, `release`, and `has_lock` are never used
[INFO] [stdout]    --> src/transaction/lock_table.rs:83:12
[INFO] [stdout]     |
[INFO] [stdout]  82 | impl ConcurrentManager {
[INFO] [stdout]     | ---------------------- associated items in this implementation
[INFO] [stdout]  83 |     pub fn new(lock_table: Arc<Mutex<LockTable>>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  88 |     pub fn slock(&mut self, block_id: &BlockId) -> anyhow::Result<()> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  96 |     pub fn xlock(&mut self, block_id: &BlockId) -> anyhow::Result<()> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     pub fn release(&mut self) {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |     fn has_lock(&self, block_id: &BlockId) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `LogRecord` is never used
[INFO] [stdout]   --> src/transaction/log_record.rs:47:10
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub enum LogRecord {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `create_checkpoint_record`, `create_start_record`, `create_commit_record`, `create_rollback_record`, `create_set_int_record`, and `create_set_string_record` are never used
[INFO] [stdout]   --> src/transaction/log_record.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl LogRecord {
[INFO] [stdout]    | -------------- associated functions in this implementation
[INFO] [stdout] 57 |     pub fn create_checkpoint_record(txnum: i32) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn create_start_record(txnum: i32) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn create_commit_record(txnum: i32) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |     pub fn create_rollback_record(txnum: i32) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     pub fn create_set_int_record(txnum: i32, offset: i32, value: i32, block_id: BlockId) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     pub fn create_set_string_record(
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `LogRecordTrait` is never used
[INFO] [stdout]    --> src/transaction/log_record.rs:124:11
[INFO] [stdout]     |
[INFO] [stdout] 124 | pub trait LogRecordTrait {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TransactionRecord` is never constructed
[INFO] [stdout]    --> src/transaction/log_record.rs:128:12
[INFO] [stdout]     |
[INFO] [stdout] 128 | pub struct TransactionRecord {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UpdateRecord` is never constructed
[INFO] [stdout]    --> src/transaction/log_record.rs:133:12
[INFO] [stdout]     |
[INFO] [stdout] 133 | pub struct UpdateRecord<T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RecoveryManager` is never constructed
[INFO] [stdout]   --> src/transaction/recovery_manager.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct RecoveryManager {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `commit`, `rollback`, `recover`, `set_int`, and `set_string` are never used
[INFO] [stdout]   --> src/transaction/recovery_manager.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl RecoveryManager {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 22 |     pub fn new(
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn commit(&self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     pub fn rollback(&self) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn recover(&self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82 |     pub fn set_int(&self, buf: Arc<RwLock<Buffer>>, offset: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 99 |     pub fn set_string(&self, buf: Arc<RwLock<Buffer>>, offset: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `TXMUN` is never used
[INFO] [stdout]   --> src/transaction/transaction.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | static TXMUN: AtomicUsize = AtomicUsize::new(0);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Transaction` is never constructed
[INFO] [stdout]   --> src/transaction/transaction.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Transaction {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/transaction/transaction.rs:28:12
[INFO] [stdout]     |
[INFO] [stdout]  27 | impl Transaction {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout]  28 |     pub fn new(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  52 |     pub fn commit(&mut self) -> anyhow::Result<()> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  59 |     pub fn rollback(&mut self) -> anyhow::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  79 |     pub fn recover(&mut self) {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |     pub fn pin(&mut self, block_id: &BlockId) -> anyhow::Result<()> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     pub fn unpin(&mut self, block_id: &BlockId) -> anyhow::Result<()> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 110 |     pub fn get_int(&mut self, block_id: &BlockId, offset: i32) -> anyhow::Result<i32> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn get_string(&mut self, block_id: &BlockId, offset: i32) -> anyhow::Result<String> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 132 |     pub fn set_int(
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 154 |     pub fn set_string(
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 176 |     pub fn size(&mut self, filename: String) -> anyhow::Result<i32> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 186 |     pub fn undo(&mut self, log_record: LogRecord) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:195:17
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 self.pin(&record.block_id);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 let _unused = self.pin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:196:17
[INFO] [stdout]     |
[INFO] [stdout] 196 |                 self.set_int(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 196 |                 let _unused = self.set_int(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:197:17
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 self.unpin(&record.block_id);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 let _unused = self.unpin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |                 self.pin(&record.block_id);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 200 |                 let _unused = self.pin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 self.set_string(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 let _unused = self.set_string(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 self.unpin(&record.block_id);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 let _unused = self.unpin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/transaction/log_record.rs:222:13
[INFO] [stdout]     |
[INFO] [stdout] 222 |             _ => {
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/transaction/log_record.rs:222:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |             LogRecordType::CheckPoint => {
[INFO] [stdout]     |             ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 152 |             LogRecordType::Start => {
[INFO] [stdout]     |             -------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 158 |             LogRecordType::Commit => {
[INFO] [stdout]     |             --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 164 |             LogRecordType::Rollback => {
[INFO] [stdout]     |             ----------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 222 |             _ => {
[INFO] [stdout]     |             ^ ...and 2 other patterns collectively make this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/transaction/log_record.rs:283:13
[INFO] [stdout]     |
[INFO] [stdout] 283 |             _ => todo!(),
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/transaction/log_record.rs:283:13
[INFO] [stdout]     |
[INFO] [stdout] 232 | /             LogRecord::CheckPoint(record)
[INFO] [stdout] 233 | |             | LogRecord::Commit(record)
[INFO] [stdout] 234 | |             | LogRecord::Start(record)
[INFO] [stdout] 235 | |             | LogRecord::Rollback(record) => {
[INFO] [stdout]     | |_________________________________________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 246 |               LogRecord::SetInt(record) => {
[INFO] [stdout]     |               ------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 264 |               LogRecord::SetString(record) => {
[INFO] [stdout]     |               ---------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 283 |               _ => todo!(),
[INFO] [stdout]     |               ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `record`
[INFO] [stdout]    --> src/transaction/transaction.rs:188:35
[INFO] [stdout]     |
[INFO] [stdout] 188 |             LogRecord::CheckPoint(record)
[INFO] [stdout]     |                                   ^^^^^^
[INFO] [stdout] 189 |             | LogRecord::Commit(record)
[INFO] [stdout]     |                                 ^^^^^^
[INFO] [stdout] 190 |             | LogRecord::Start(record)
[INFO] [stdout]     |                                ^^^^^^
[INFO] [stdout] 191 |             | LogRecord::Rollback(record) => {
[INFO] [stdout]     |                                   ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 188 ~             LogRecord::CheckPoint(_record)
[INFO] [stdout] 189 ~             | LogRecord::Commit(_record)
[INFO] [stdout] 190 ~             | LogRecord::Start(_record)
[INFO] [stdout] 191 ~             | LogRecord::Rollback(_record) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rval`
[INFO] [stdout]    --> src/transaction/transaction.rs:286:13
[INFO] [stdout]     |
[INFO] [stdout] 286 |         let rval = tx4.get_int(&block, 80);
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_rval`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_TIME` is never used
[INFO] [stdout]   --> src/buffer_manager.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const MAX_TIME: i32 = 10000;
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_TIME` is never used
[INFO] [stdout]   --> src/buffer_manager.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const MAX_TIME: i32 = 10000;
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BufferAbortError` is never used
[INFO] [stdout]   --> src/buffer_manager.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub enum BufferAbortError {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Buffer` is never constructed
[INFO] [stdout]   --> src/buffer_manager.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Buffer {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/file_manager.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl BlockId {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 19 |     fn new(filename: &str, block_number: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `length` is never used
[INFO] [stdout]    --> src/file_manager.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl FileManager {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 140 |     pub fn length(&mut self, filename: &String) -> anyhow::Result<i32> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `record_type` is never read
[INFO] [stdout]    --> src/transaction/log_record.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 133 | pub struct UpdateRecord<T> {
[INFO] [stdout]     |            ------------ field in this struct
[INFO] [stdout] 134 |     record_type: LogRecordType,
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_set_int` is never used
[INFO] [stdout]    --> src/transaction/log_record.rs:313:8
[INFO] [stdout]     |
[INFO] [stdout] 313 |     fn test_set_int() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `recover` is never used
[INFO] [stdout]   --> src/transaction/recovery_manager.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl RecoveryManager {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn recover(&self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `file_manager` and `buffer_manager` are never read
[INFO] [stdout]   --> src/transaction/transaction.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Transaction {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 18 |     file_manager: Arc<Mutex<FileManager>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 19 |     log_manager: Arc<Mutex<LogManager>>,
[INFO] [stdout] 20 |     buffer_manager: Arc<Mutex<BufferManager>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `recover` and `size` are never used
[INFO] [stdout]    --> src/transaction/transaction.rs:79:12
[INFO] [stdout]     |
[INFO] [stdout]  27 | impl Transaction {
[INFO] [stdout]     | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  79 |     pub fn recover(&mut self) {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 176 |     pub fn size(&mut self, filename: String) -> anyhow::Result<i32> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/buffer_manager.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl Buffer {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 42 |     fn new(block_size: usize) -> Buffer {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn block_id(&self) -> Option<&BlockId> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn set_modified(&mut self, txnum: i32, last_save_number: i32) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn is_pinned(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn modifying_tx(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 75 |     fn assign_to_back(&mut self, block_id: BlockId) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     fn flush(&mut self) {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 82 |
[INFO] [stdout] 83 |     fn pin(&mut self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |     fn unpin(&mut self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BufferManager` is never constructed
[INFO] [stdout]   --> src/buffer_manager.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub struct BufferManager {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/buffer_manager.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl BufferManager {
[INFO] [stdout]     | ------------------ associated items in this implementation
[INFO] [stdout] 100 |     pub fn new(
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     pub fn available(&self) -> i32 {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn flush_all(&mut self, txnum: i32) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 141 |     pub fn unpin(&mut self, buffer: Arc<RwLock<Buffer>>) {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     pub fn pin(&mut self, block_id: &BlockId) -> Result<Arc<RwLock<Buffer>>, BufferAbortError> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 155 |     fn try_to_pin(&mut self, block_id: &BlockId) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 167 |     fn find_assignable_block(&self, block_id: &BlockId) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 183 |     fn find_existing_buffer(&self, target_block_id: &BlockId) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 196 |     fn choose_unpinned_buffer(&self) -> Option<Arc<RwLock<Buffer>>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PAGE_SIZE` is never used
[INFO] [stdout]  --> src/file_manager.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub const PAGE_SIZE: usize = 4096;
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INTGER_BYTES` is never used
[INFO] [stdout]   --> src/file_manager.rs:10:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub const INTGER_BYTES: usize = 4;
[INFO] [stdout]    |           ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockId` is never constructed
[INFO] [stdout]   --> src/file_manager.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct BlockId {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/file_manager.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl BlockId {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 19 |     fn new(filename: &str, block_number: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Page` is never constructed
[INFO] [stdout]   --> src/file_manager.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Page {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/file_manager.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Page {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 33 |     pub fn new(block_size: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub fn get_int(&mut self, offset: usize) -> io::Result<i32> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn set_int(&mut self, offset: usize, value: i32) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn get_bytes(&mut self, offset: usize) -> io::Result<Box<[u8]>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn set_bytes(&mut self, offset: usize, value: &[u8]) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     pub fn get_string(&mut self, offset: usize) -> io::Result<String> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     pub fn set_string(&mut self, offset: usize, value: String) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn max_length(strlen: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 81 |     pub fn contents(&mut self) -> &mut Vec<u8> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileManager` is never constructed
[INFO] [stdout]   --> src/file_manager.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub struct FileManager {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/file_manager.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl FileManager {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 101 |     pub fn new(directory: String) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     pub fn write(&mut self, block_id: &BlockId, page: &mut Page) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     pub fn read(&mut self, block_id: &BlockId, page: &mut Page) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     fn get_file(&mut self, filename: &String) -> io::Result<File> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |     pub fn length(&mut self, filename: &String) -> anyhow::Result<i32> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 146 |     pub fn append_new_block(&mut self, filename: &String) -> io::Result<BlockId> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 162 |     pub fn last_block_num(&mut self, filename: &String) -> io::Result<usize> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LogManager` is never constructed
[INFO] [stdout]  --> src/log_manager.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct LogManager {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/log_manager.rs:18:12
[INFO] [stdout]     |
[INFO] [stdout]  17 | impl LogManager {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout]  18 |     pub fn new(mut file_manager: FileManager, log_file: String) -> io::Result<Self> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout]  43 |     pub fn flush_with(&mut self, lsn: i32) -> io::Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  50 |     pub fn iterator(&mut self) -> io::Result<LogIterator> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  55 |     pub fn append_record(&mut self, log_record: &[u8]) -> io::Result<i32> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  75 |     fn append_new_block(&mut self) -> io::Result<BlockId> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  91 |     fn get_boundary(&mut self) -> i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  95 |     fn set_boundary(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 101 |     fn flush(&mut self) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LogIterator` is never constructed
[INFO] [stdout]    --> src/log_manager.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 | pub struct LogIterator {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `move_to_block` are never used
[INFO] [stdout]    --> src/log_manager.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout] 119 | impl LogIterator {
[INFO] [stdout]     | ---------------- associated items in this implementation
[INFO] [stdout] 120 |     pub fn new(file_manager: Arc<Mutex<FileManager>>, block_id: BlockId) -> io::Result<Self> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn move_to_block(&mut self, block_id: &BlockId) -> io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:195:17
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 self.pin(&record.block_id);
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 195 |                 let _unused = self.pin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:196:17
[INFO] [stdout]     |
[INFO] [stdout] 196 |                 self.set_int(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 196 |                 let _unused = self.set_int(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:197:17
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 self.unpin(&record.block_id);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 197 |                 let _unused = self.unpin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:200:17
[INFO] [stdout]     |
[INFO] [stdout] 200 |                 self.pin(&record.block_id);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 200 |                 let _unused = self.pin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:201:17
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 self.set_string(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 201 |                 let _unused = self.set_string(&record.block_id, record.offset, record.value, false);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:202:17
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 self.unpin(&record.block_id);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 202 |                 let _unused = self.unpin(&record.block_id);
[INFO] [stdout]     |                 +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/transaction/transaction.rs:244:31
[INFO] [stdout]     |
[INFO] [stdout] 244 |             filename: filename.clone().to_string(),
[INFO] [stdout]     |                               ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:248:9
[INFO] [stdout]     |
[INFO] [stdout] 248 |         tx1.pin(&block);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 248 |         let _unused = tx1.pin(&block);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:249:9
[INFO] [stdout]     |
[INFO] [stdout] 249 |         tx1.set_int(&block, 80, 1, false);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 249 |         let _unused = tx1.set_int(&block, 80, 1, false);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:250:9
[INFO] [stdout]     |
[INFO] [stdout] 250 |         tx1.set_string(&block, 40, "one".to_string(), false);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 250 |         let _unused = tx1.set_string(&block, 40, "one".to_string(), false);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:251:9
[INFO] [stdout]     |
[INFO] [stdout] 251 |         tx1.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 251 |         let _unused = tx1.commit();
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:259:9
[INFO] [stdout]     |
[INFO] [stdout] 259 |         tx2.pin(&block);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 259 |         let _unused = tx2.pin(&block);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:265:9
[INFO] [stdout]     |
[INFO] [stdout] 265 |         tx2.set_int(&block, 80, new_ival, false);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 265 |         let _unused = tx2.set_int(&block, 80, new_ival, false);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:266:9
[INFO] [stdout]     |
[INFO] [stdout] 266 |         tx2.set_string(&block, 40, new_sval.to_string(), false);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 266 |         let _unused = tx2.set_string(&block, 40, new_sval.to_string(), false);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:267:9
[INFO] [stdout]     |
[INFO] [stdout] 267 |         tx2.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 267 |         let _unused = tx2.commit();
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:275:9
[INFO] [stdout]     |
[INFO] [stdout] 275 |         tx3.pin(&block);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 275 |         let _unused = tx3.pin(&block);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:276:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |         tx3.set_int(&block, 80, 9999, false);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 276 |         let _unused = tx3.set_int(&block, 80, 9999, false);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 277 |         tx3.rollback();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 277 |         let _unused = tx3.rollback();
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:285:9
[INFO] [stdout]     |
[INFO] [stdout] 285 |         tx4.pin(&block);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 285 |         let _unused = tx4.pin(&block);
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/transaction/transaction.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         tx4.commit();
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _unused = ...` to ignore the resulting value without dropping it immediately
[INFO] [stdout]     |
[INFO] [stdout] 287 |         let _unused = tx4.commit();
[INFO] [stdout]     |         +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_TIME` is never used
[INFO] [stdout]   --> src/buffer_manager.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const MAX_TIME: i32 = 10000;
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `txnum` and `last_save_numbder` are never read
[INFO] [stdout]   --> src/buffer_manager.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct Buffer {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 24 |     txnum: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 25 |     last_save_numbder: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `block_id`, `set_modified`, and `modifying_tx` are never used
[INFO] [stdout]   --> src/buffer_manager.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl Buffer {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn block_id(&self) -> Option<&BlockId> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 60 |     pub fn set_modified(&mut self, txnum: i32, last_save_number: i32) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71 |     pub fn modifying_tx(&self) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `log_manager` is never read
[INFO] [stdout]   --> src/buffer_manager.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub struct BufferManager {
[INFO] [stdout]    |            ------------- field in this struct
[INFO] [stdout] 93 |     file_manager: Arc<Mutex<FileManager>>,
[INFO] [stdout] 94 |     log_manager: Arc<Mutex<LogManager>>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `flush_all` is never used
[INFO] [stdout]    --> src/buffer_manager.rs:120:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl BufferManager {
[INFO] [stdout]     | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 120 |     pub fn flush_all(&mut self, txnum: i32) {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/file_manager.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl BlockId {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 19 |     fn new(filename: &str, block_number: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `length` is never used
[INFO] [stdout]    --> src/file_manager.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl FileManager {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 140 |     pub fn length(&mut self, filename: &String) -> anyhow::Result<i32> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `flush_with` is never used
[INFO] [stdout]   --> src/log_manager.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl LogManager {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 43 |     pub fn flush_with(&mut self, lsn: i32) -> io::Result<()> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.88s
[INFO] running `Command { std: "docker" "inspect" "36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6", kill_on_drop: false }`
[INFO] [stdout] 36a1193c64fb91b72aa7506206dc8be0ea5ed301778df6d07d8e7301292649b6
