[INFO] fetching crate shorterDB 0.1.1...
[INFO] checking shorterDB-0.1.1 against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] extracting crate shorterDB 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate shorterDB 0.1.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate shorterDB 0.1.1
[INFO] tweaked toml for crates.io crate shorterDB 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate shorterDB 0.1.1 on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate shorterDB 0.1.1 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] [stdout] 7c449de22266c1a896c8da8183a57e549700bc55f3f491ad50de2522f2f5b751
[INFO] running `Command { std: "docker" "start" "-a" "7c449de22266c1a896c8da8183a57e549700bc55f3f491ad50de2522f2f5b751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c449de22266c1a896c8da8183a57e549700bc55f3f491ad50de2522f2f5b751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c449de22266c1a896c8da8183a57e549700bc55f3f491ad50de2522f2f5b751", kill_on_drop: false }`
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[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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1afee00340a59be02aa876fe919124d91df7391781f0790a7ad474a62850ecdc
[INFO] running `Command { std: "docker" "start" "-a" "1afee00340a59be02aa876fe919124d91df7391781f0790a7ad474a62850ecdc", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/kv/db.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{fs, io::Read};
[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 import: `self`
[INFO] [stdout]  --> src/kv/sst.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     path::{self, Path, PathBuf},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `Read`
[INFO] [stdout]  --> src/kv/sst.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::{BufReader, Read};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/kv/db.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{fs, io::Read};
[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 import: `self`
[INFO] [stdout]  --> src/kv/sst.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     path::{self, Path, PathBuf},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `Read`
[INFO] [stdout]  --> src/kv/sst.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::{BufReader, Read};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/kv/sst.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut curr_level_size = Vec::new();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/kv/sst.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut curr_level_size = Vec::new();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/kv/sst.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/kv/sst.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         let level = path.clone();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/kv/sst.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/kv/sst.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         let level = path.clone();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]   --> src/kv/sst.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |             for sst in ssts {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]   --> src/kv/sst.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |             for sst in ssts {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/kv/sst.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let mut file = File::create_new(&path_of_kv_file);
[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/kv/sst.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let mut file = File::create_new(&path_of_kv_file);
[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/kv/sst.rs:149:25
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     let mut file = OpenOptions::new()
[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/kv/sst.rs:149:25
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     let mut file = OpenOptions::new()
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]    --> src/kv/sst.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             for sst in ssts {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]    --> src/kv/sst.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             for sst in ssts {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data_dir` is never read
[INFO] [stdout]   --> src/kv/db.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ShorterDB {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub(crate) data_dir: PathBuf,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]    --> src/kv/sst.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout]  26 | impl SST {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 169 |     pub(crate) fn delete(&mut self, key: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/kv/wal.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) struct WAL {
[INFO] [stdout]    |                   --- field in this struct
[INFO] [stdout] 12 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_entries` is never used
[INFO] [stdout]   --> src/kv/wal.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl WAL {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub(crate) fn read_entries(&self) -> io::Result<Vec<WALEntry>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data_dir` is never read
[INFO] [stdout]   --> src/kv/db.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ShorterDB {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub(crate) data_dir: PathBuf,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]    --> src/kv/sst.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout]  26 | impl SST {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 169 |     pub(crate) fn delete(&mut self, key: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/kv/wal.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) struct WAL {
[INFO] [stdout]    |                   --- field in this struct
[INFO] [stdout] 12 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_entries` is never used
[INFO] [stdout]   --> src/kv/wal.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl WAL {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub(crate) fn read_entries(&self) -> io::Result<Vec<WALEntry>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fs::create_dir_all(&data_dir); // Ensure the data directory exists
[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 _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let _ = fs::create_dir_all(&data_dir); // Ensure the data directory exists
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         self.wal.write(&entry);
[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] 67 |         let _ = self.wal.write(&entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         self.wal.write(&tombstone_entry);
[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] 91 |         let _ = self.wal.write(&tombstone_entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/sst.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 create_dir(l0.clone());
[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] 35 |                 let _ = create_dir(l0.clone());
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/kv/sst.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                     file.unwrap().write_all(value);
[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] 153 |                     let _ = file.unwrap().write_all(value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fs::create_dir_all(&data_dir); // Ensure the data directory exists
[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 _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let _ = fs::create_dir_all(&data_dir); // Ensure the data directory exists
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         self.wal.write(&entry);
[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] 67 |         let _ = self.wal.write(&entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         self.wal.write(&tombstone_entry);
[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] 91 |         let _ = self.wal.write(&tombstone_entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/sst.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 create_dir(l0.clone());
[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] 35 |                 let _ = create_dir(l0.clone());
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/kv/sst.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                     file.unwrap().write_all(value);
[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] 153 |                     let _ = file.unwrap().write_all(value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/kv/db.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{fs, io::Read};
[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 import: `self`
[INFO] [stdout]  --> src/kv/sst.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     path::{self, Path, PathBuf},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `Read`
[INFO] [stdout]  --> src/kv/sst.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::{BufReader, Read};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/kv/db.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{fs, io::Read};
[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 import: `self`
[INFO] [stdout]  --> src/kv/sst.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     path::{self, Path, PathBuf},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `Read`
[INFO] [stdout]  --> src/kv/sst.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::{BufReader, Read};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/kv/db.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{fs, io::Read};
[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 import: `self`
[INFO] [stdout]  --> src/kv/sst.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     path::{self, Path, PathBuf},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `Read`
[INFO] [stdout]  --> src/kv/sst.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::{BufReader, Read};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::Read`
[INFO] [stdout]  --> src/kv/db.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{fs, io::Read};
[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 import: `self`
[INFO] [stdout]  --> src/kv/sst.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     path::{self, Path, PathBuf},
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `Read`
[INFO] [stdout]  --> src/kv/sst.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::{BufReader, Read};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/kv/sst.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut curr_level_size = Vec::new();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/kv/sst.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/kv/sst.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         let level = path.clone();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]   --> src/kv/sst.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |             for sst in ssts {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/kv/sst.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let mut file = File::create_new(&path_of_kv_file);
[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/kv/sst.rs:149:25
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     let mut file = OpenOptions::new()
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]    --> src/kv/sst.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             for sst in ssts {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data_dir` is never read
[INFO] [stdout]   --> src/kv/db.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ShorterDB {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub(crate) data_dir: PathBuf,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]    --> src/kv/sst.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout]  26 | impl SST {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 169 |     pub(crate) fn delete(&mut self, key: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/kv/wal.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) struct WAL {
[INFO] [stdout]    |                   --- field in this struct
[INFO] [stdout] 12 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_entries` is never used
[INFO] [stdout]   --> src/kv/wal.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl WAL {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub(crate) fn read_entries(&self) -> io::Result<Vec<WALEntry>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fs::create_dir_all(&data_dir); // Ensure the data directory exists
[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 _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let _ = fs::create_dir_all(&data_dir); // Ensure the data directory exists
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         self.wal.write(&entry);
[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] 67 |         let _ = self.wal.write(&entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         self.wal.write(&tombstone_entry);
[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] 91 |         let _ = self.wal.write(&tombstone_entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/sst.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 create_dir(l0.clone());
[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] 35 |                 let _ = create_dir(l0.clone());
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/kv/sst.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                     file.unwrap().write_all(value);
[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] 153 |                     let _ = file.unwrap().write_all(value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/kv/sst.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut curr_level_size = Vec::new();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/kv/sst.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/kv/sst.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         let level = path.clone();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]   --> src/kv/sst.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |             for sst in ssts {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/kv/sst.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let mut file = File::create_new(&path_of_kv_file);
[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/kv/sst.rs:149:25
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     let mut file = OpenOptions::new()
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]    --> src/kv/sst.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             for sst in ssts {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data_dir` is never read
[INFO] [stdout]   --> src/kv/db.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ShorterDB {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub(crate) data_dir: PathBuf,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]    --> src/kv/sst.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout]  26 | impl SST {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 169 |     pub(crate) fn delete(&mut self, key: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/kv/wal.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) struct WAL {
[INFO] [stdout]    |                   --- field in this struct
[INFO] [stdout] 12 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_entries` is never used
[INFO] [stdout]   --> src/kv/wal.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl WAL {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub(crate) fn read_entries(&self) -> io::Result<Vec<WALEntry>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fs::create_dir_all(&data_dir); // Ensure the data directory exists
[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 _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let _ = fs::create_dir_all(&data_dir); // Ensure the data directory exists
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         self.wal.write(&entry);
[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] 67 |         let _ = self.wal.write(&entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         self.wal.write(&tombstone_entry);
[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] 91 |         let _ = self.wal.write(&tombstone_entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/sst.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 create_dir(l0.clone());
[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] 35 |                 let _ = create_dir(l0.clone());
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/kv/sst.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                     file.unwrap().write_all(value);
[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] 153 |                     let _ = file.unwrap().write_all(value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/kv/sst.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut curr_level_size = Vec::new();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/kv/sst.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 let mut curr_level_size = Vec::new();
[INFO] [stdout]    |                     ----^^^^^^^^^^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/kv/sst.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/kv/sst.rs:50:17
[INFO] [stdout]    |
[INFO] [stdout] 50 |             Err(e) => {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/kv/sst.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         let level = path.clone();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level`
[INFO] [stdout]   --> src/kv/sst.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |                         let level = path.clone();
[INFO] [stdout]    |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_level`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]   --> src/kv/sst.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |             for sst in ssts {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]   --> src/kv/sst.rs:90:17
[INFO] [stdout]    |
[INFO] [stdout] 90 |             for sst in ssts {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/kv/sst.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let mut file = File::create_new(&path_of_kv_file);
[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/kv/sst.rs:140:17
[INFO] [stdout]     |
[INFO] [stdout] 140 |             let mut file = File::create_new(&path_of_kv_file);
[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/kv/sst.rs:149:25
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     let mut file = OpenOptions::new()
[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/kv/sst.rs:149:25
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     let mut file = OpenOptions::new()
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]    --> src/kv/sst.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             for sst in ssts {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sst`
[INFO] [stdout]    --> src/kv/sst.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             for sst in ssts {
[INFO] [stdout]     |                 ^^^ help: if this is intentional, prefix it with an underscore: `_sst`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data_dir` is never read
[INFO] [stdout]   --> src/kv/db.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ShorterDB {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub(crate) data_dir: PathBuf,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `data_dir` is never read
[INFO] [stdout]   --> src/kv/db.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ShorterDB {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub(crate) data_dir: PathBuf,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]    --> src/kv/sst.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout]  26 | impl SST {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 169 |     pub(crate) fn delete(&mut self, key: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/kv/wal.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) struct WAL {
[INFO] [stdout]    |                   --- field in this struct
[INFO] [stdout] 12 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_entries` is never used
[INFO] [stdout]   --> src/kv/wal.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl WAL {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub(crate) fn read_entries(&self) -> io::Result<Vec<WALEntry>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DelRequest` is never constructed
[INFO] [stdout]   --> /opt/rustwide/target/debug/build/shorterDB-ec97767ec2544fe9/out/commands.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct DelRequest {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete` is never used
[INFO] [stdout]    --> src/kv/sst.rs:169:19
[INFO] [stdout]     |
[INFO] [stdout]  26 | impl SST {
[INFO] [stdout]     | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 169 |     pub(crate) fn delete(&mut self, key: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]   --> src/kv/wal.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) struct WAL {
[INFO] [stdout]    |                   --- field in this struct
[INFO] [stdout] 12 |     path: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `read_entries` is never used
[INFO] [stdout]   --> src/kv/wal.rs:32:19
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl WAL {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub(crate) fn read_entries(&self) -> io::Result<Vec<WALEntry>> {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DelRequest` is never constructed
[INFO] [stdout]   --> /opt/rustwide/target/debug/build/shorterDB-ec97767ec2544fe9/out/commands.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct DelRequest {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fs::create_dir_all(&data_dir); // Ensure the data directory exists
[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 _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let _ = fs::create_dir_all(&data_dir); // Ensure the data directory exists
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         self.wal.write(&entry);
[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] 67 |         let _ = self.wal.write(&entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         fs::create_dir_all(&data_dir); // Ensure the data directory exists
[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 _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 21 |         let _ = fs::create_dir_all(&data_dir); // Ensure the data directory exists
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         self.wal.write(&tombstone_entry);
[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] 91 |         let _ = self.wal.write(&tombstone_entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         self.wal.write(&entry);
[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] 67 |         let _ = self.wal.write(&entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/sst.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 create_dir(l0.clone());
[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] 35 |                 let _ = create_dir(l0.clone());
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/kv/sst.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                     file.unwrap().write_all(value);
[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] 153 |                     let _ = file.unwrap().write_all(value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/db.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         self.wal.write(&tombstone_entry);
[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] 91 |         let _ = self.wal.write(&tombstone_entry);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/kv/sst.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |                 create_dir(l0.clone());
[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] 35 |                 let _ = create_dir(l0.clone());
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]    --> src/kv/sst.rs:153:21
[INFO] [stdout]     |
[INFO] [stdout] 153 |                     file.unwrap().write_all(value);
[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] 153 |                     let _ = file.unwrap().write_all(value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 18s
[INFO] running `Command { std: "docker" "inspect" "1afee00340a59be02aa876fe919124d91df7391781f0790a7ad474a62850ecdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1afee00340a59be02aa876fe919124d91df7391781f0790a7ad474a62850ecdc", kill_on_drop: false }`
[INFO] [stdout] 1afee00340a59be02aa876fe919124d91df7391781f0790a7ad474a62850ecdc
