[INFO] cloning repository https://github.com/0xsupremedev/auradb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0xsupremedev/auradb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xsupremedev%2Fauradb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xsupremedev%2Fauradb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cf45a55799eaeec3d0df158028372e5a595b7a35
[INFO] checking 0xsupremedev/auradb against try#f77b5bc6c7c84df104f86b0dd01d9490e3923fa8 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xsupremedev%2Fauradb" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
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[INFO] started tweaking git repo https://github.com/0xsupremedev/auradb
[INFO] finished tweaking git repo https://github.com/0xsupremedev/auradb
[INFO] tweaked toml for git repo https://github.com/0xsupremedev/auradb written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/0xsupremedev/auradb on toolchain f77b5bc6c7c84df104f86b0dd01d9490e3923fa8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/0xsupremedev/auradb 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" "+f77b5bc6c7c84df104f86b0dd01d9490e3923fa8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "6f12e365cba5982d016932d74fafa348b8a0a4df72af2f5077d146886b2964c4", kill_on_drop: false }`
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[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]   --> src/api.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub struct AuraEngine {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 66 |     /// Engine configuration
[INFO] [stdout] 67 |     config: Config,
[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 `config` is never read
[INFO] [stdout]   --> src/api.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 65 | pub struct AuraEngine {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 66 |     /// Engine configuration
[INFO] [stdout] 67 |     config: Config,
[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 `operations` and `key_size` are never read
[INFO] [stdout]    --> src/bin/run_all_ycsb_workloads.rs:184:5
[INFO] [stdout]     |
[INFO] [stdout] 182 | struct WorkloadResult {
[INFO] [stdout]     |        -------------- fields in this struct
[INFO] [stdout] 183 |     workload: char,
[INFO] [stdout] 184 |     operations: usize,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 185 |     key_size: usize,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `WorkloadResult` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `black_box`
[INFO] [stdout]  --> benches/benchmarks.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use criterion::{black_box, criterion_group, criterion_main, Criterion};
[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: `AuraEngine`
[INFO] [stdout]  --> benches/benchmarks.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 | use auradb::{AuraEngine, Engine, EngineBuilder};
[INFO] [stdout]   |              ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/full_benchmark.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut db = AuraEngine::new(config).expect("DB init failed");
[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: `i`
[INFO] [stdout]   --> src/bin/full_benchmark.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     for i in 0..(operations / 10) {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]  --> src/bin/rocksdb_comparison.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::Path;
[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: `std::path::Path`
[INFO] [stdout]  --> src/bin/rocksdb_comparison.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::Path;
[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: `AuraEngine`
[INFO] [stdout]  --> examples/basic_usage.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use auradb::{EngineBuilder, AuraEngine};
[INFO] [stdout]   |                             ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `put` found for struct `Batch` in the current scope
[INFO] [stdout]   --> benches/benchmarks.rs:36:19
[INFO] [stdout]    |
[INFO] [stdout] 36 |             batch.put(format!("batch_key_{}", i), format!("batch_value_{}", i));
[INFO] [stdout]    |                   ^^^ method not found in `Batch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `operations` and `key_size` are never read
[INFO] [stdout]    --> src/bin/run_all_ycsb_workloads.rs:184:5
[INFO] [stdout]     |
[INFO] [stdout] 182 | struct WorkloadResult {
[INFO] [stdout]     |        -------------- fields in this struct
[INFO] [stdout] 183 |     workload: char,
[INFO] [stdout] 184 |     operations: usize,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 185 |     key_size: usize,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `WorkloadResult` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> benches/benchmarks.rs:39:32
[INFO] [stdout]     |
[INFO] [stdout]  39 |             engine.write_batch(&batch).unwrap();
[INFO] [stdout]     |                    ----------- ^^^^^^ expected `&[(Vec<u8>, Vec<u8>)]`, found `&Batch`
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    arguments to this method are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&[(Vec<u8>, Vec<u8>)]`
[INFO] [stdout]                found reference `&Batch`
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/api.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub fn write_batch(&self, batch: &[(Vec<u8>, Vec<u8>)]) -> Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> examples/basic_usage.rs:65:24
[INFO] [stdout]     |
[INFO] [stdout]  65 |     engine.write_batch(&batch)?;
[INFO] [stdout]     |            ----------- ^^^^^^ expected `&[(Vec<u8>, Vec<u8>)]`, found `&Batch`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            arguments to this method are incorrect
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&[(Vec<u8>, Vec<u8>)]`
[INFO] [stdout]                found reference `&Batch`
[INFO] [stdout] note: method defined here
[INFO] [stdout]    --> /opt/rustwide/workdir/src/api.rs:145:12
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub fn write_batch(&self, batch: &[(Vec<u8>, Vec<u8>)]) -> Result<()> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/full_benchmark.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut db = AuraEngine::new(config).expect("DB init failed");
[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] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/bin/full_benchmark.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     for i in 0..(operations / 10) {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `auradb` (example "basic_usage") due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `auradb` (bench "benchmarks") due to 2 previous errors; 2 warnings emitted
[INFO] [stdout] warning: unused variable: `mixed_result`
[INFO] [stdout]   --> src/bin/rocksdb_comparison.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mixed_result = benchmark_read_while_writing(&mut db, args);
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mixed_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `p50_latency_us` and `p99_latency_us` are never read
[INFO] [stdout]   --> src/bin/rocksdb_comparison.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct RocksDBBenchmark {
[INFO] [stdout]    |        ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     p50_latency_us: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 40 |     p99_latency_us: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:218:17
[INFO] [stdout]     |
[INFO] [stdout] 218 |                 cumulative += self.workload.read_modify_write_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:207:17
[INFO] [stdout]     |
[INFO] [stdout] 207 |                 cumulative += self.workload.scan_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:196:17
[INFO] [stdout]     |
[INFO] [stdout] 196 |                 cumulative += self.workload.insert_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:188:17
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 cumulative += self.workload.update_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:178:17
[INFO] [stdout]     |
[INFO] [stdout] 178 |                 cumulative += self.workload.read_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:185:21
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     self.db.put_bytes(key, &value);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     let _ = self.db.put_bytes(key, &value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:193:17
[INFO] [stdout]     |
[INFO] [stdout] 193 |                 self.db.put_bytes(&key, &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] 193 |                 let _ = self.db.put_bytes(&key, &value);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:215:21
[INFO] [stdout]     |
[INFO] [stdout] 215 |                     self.db.put_bytes(key, &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] 215 |                     let _ = self.db.put_bytes(key, &value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mixed_result`
[INFO] [stdout]   --> src/bin/rocksdb_comparison.rs:83:9
[INFO] [stdout]    |
[INFO] [stdout] 83 |     let mixed_result = benchmark_read_while_writing(&mut db, args);
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mixed_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:218:17
[INFO] [stdout]     |
[INFO] [stdout] 218 |                 cumulative += self.workload.read_modify_write_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `p50_latency_us` and `p99_latency_us` are never read
[INFO] [stdout]   --> src/bin/rocksdb_comparison.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct RocksDBBenchmark {
[INFO] [stdout]    |        ---------------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     p50_latency_us: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 40 |     p99_latency_us: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:207:17
[INFO] [stdout]     |
[INFO] [stdout] 207 |                 cumulative += self.workload.scan_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:196:17
[INFO] [stdout]     |
[INFO] [stdout] 196 |                 cumulative += self.workload.insert_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:188:17
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 cumulative += self.workload.update_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative` is never read
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:178:17
[INFO] [stdout]     |
[INFO] [stdout] 178 |                 cumulative += self.workload.read_ratio;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:185:21
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     self.db.put_bytes(key, &value);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 185 |                     let _ = self.db.put_bytes(key, &value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:193:17
[INFO] [stdout]     |
[INFO] [stdout] 193 |                 self.db.put_bytes(&key, &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] 193 |                 let _ = self.db.put_bytes(&key, &value);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/ycsb_benchmark.rs:215:21
[INFO] [stdout]     |
[INFO] [stdout] 215 |                     self.db.put_bytes(key, &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] 215 |                     let _ = self.db.put_bytes(key, &value);
[INFO] [stdout]     |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4d4edac455a4ea1557ef88a2d8caef362ddd0d2f729a6aad2066053cf4078a1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d4edac455a4ea1557ef88a2d8caef362ddd0d2f729a6aad2066053cf4078a1d", kill_on_drop: false }`
[INFO] [stdout] 4d4edac455a4ea1557ef88a2d8caef362ddd0d2f729a6aad2066053cf4078a1d
