[INFO] cloning repository https://github.com/brelance/Solution-v1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brelance/Solution-v1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrelance%2FSolution-v1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrelance%2FSolution-v1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dfacfe55c6ce51ccbc46e4c470e69cf4d12bad37
[INFO] testing brelance/Solution-v1 against beta-2025-09-21 for beta-1.91-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrelance%2FSolution-v1" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-5-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-5-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/brelance/Solution-v1
[INFO] finished tweaking git repo https://github.com/brelance/Solution-v1
[INFO] tweaked toml for git repo https://github.com/brelance/Solution-v1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brelance/Solution-v1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brelance/Solution-v1 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0418a0bfccea5ebd0ff26544877d5e5aa5bb109d007f4197a124c00e55eac325
[INFO] running `Command { std: "docker" "start" "-a" "0418a0bfccea5ebd0ff26544877d5e5aa5bb109d007f4197a124c00e55eac325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0418a0bfccea5ebd0ff26544877d5e5aa5bb109d007f4197a124c00e55eac325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0418a0bfccea5ebd0ff26544877d5e5aa5bb109d007f4197a124c00e55eac325", kill_on_drop: false }`
[INFO] [stdout] 0418a0bfccea5ebd0ff26544877d5e5aa5bb109d007f4197a124c00e55eac325
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b0e77b94f861d02a238fe9bf407cafc13942788d0aafba51eab23aacd8a62d7
[INFO] running `Command { std: "docker" "start" "-a" "1b0e77b94f861d02a238fe9bf407cafc13942788d0aafba51eab23aacd8a62d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]    Compiling rustix v0.36.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling raw-cpuid v10.6.0
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling crossbeam-skiplist v0.1.0
[INFO] [stderr]    Compiling moka v0.9.6
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling uuid v1.2.2
[INFO] [stderr]    Compiling tagptr v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling triomphe v0.1.8
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling clap_lex v0.3.0
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling shared_child v1.0.0
[INFO] [stderr]    Compiling os_pipe v1.1.2
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling arc-swap v1.5.1
[INFO] [stderr]    Compiling ryu v1.0.12
[INFO] [stderr]    Compiling console v0.15.2
[INFO] [stderr]    Compiling duct v0.13.6
[INFO] [stderr]    Compiling crossbeam-channel v0.5.11
[INFO] [stderr]    Compiling scheduled-thread-pool v0.2.6
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling quanta v0.10.1
[INFO] [stderr]    Compiling is-terminal v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.38
[INFO] [stderr]    Compiling ouroboros_macro v0.15.5
[INFO] [stderr]    Compiling clap_derive v4.0.21
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling clap v4.0.32
[INFO] [stderr]    Compiling ouroboros v0.15.5
[INFO] [stderr]    Compiling mini-lsm v0.1.0 (/opt/rustwide/workdir/mini-lsm)
[INFO] [stderr]    Compiling mini-lsm-xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stderr]    Compiling mini-lsm-starter v0.1.0 (/opt/rustwide/workdir/mini-lsm-starter)
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[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::borrow::BorrowMut`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone` and `iter`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{iter, clone};
[INFO] [stdout]   |           ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::debug::as_bytes`
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::debug::as_bytes;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::block::{self, Block};
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `value` is never read
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_storage.rs:65:17
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut value = None;
[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: unused variable: `flush_lock`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let mut flush_table;
[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: `iter`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let mut iter = memtable.scan(lower, upper);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:186:17
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let mut iter = memtable.scan(lower, upper);
[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]    --> mini-lsm-starter/src/lsm_storage.rs:193:17
[INFO] [stdout]     |
[INFO] [stdout] 193 |             let mut iter = match lower {
[INFO] [stdout]     |                 ----^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         flush_table.flush(&mut sst_builder);
[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] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             self.next();
[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] 113 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.blockbuilder.add(key, value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             self.next();
[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] 96 |             let _ = self.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.10s
[INFO] running `Command { std: "docker" "inspect" "1b0e77b94f861d02a238fe9bf407cafc13942788d0aafba51eab23aacd8a62d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b0e77b94f861d02a238fe9bf407cafc13942788d0aafba51eab23aacd8a62d7", kill_on_drop: false }`
[INFO] [stdout] 1b0e77b94f861d02a238fe9bf407cafc13942788d0aafba51eab23aacd8a62d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2596501e8720b13e77adf46077db90b277d4f1c7a151b795c2d6300decda199
[INFO] running `Command { std: "docker" "start" "-a" "f2596501e8720b13e77adf46077db90b277d4f1c7a151b795c2d6300decda199", kill_on_drop: false }`
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling mini-lsm-xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[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::borrow::BorrowMut`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone` and `iter`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{iter, clone};
[INFO] [stdout]   |           ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::debug::as_bytes`
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::debug::as_bytes;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::block::{self, Block};
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `value` is never read
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_storage.rs:65:17
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut value = None;
[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: unused variable: `flush_lock`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let mut flush_table;
[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: `iter`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let mut iter = memtable.scan(lower, upper);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:186:17
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let mut iter = memtable.scan(lower, upper);
[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]    --> mini-lsm-starter/src/lsm_storage.rs:193:17
[INFO] [stdout]     |
[INFO] [stdout] 193 |             let mut iter = match lower {
[INFO] [stdout]     |                 ----^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         flush_table.flush(&mut sst_builder);
[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] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             self.next();
[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] 113 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.blockbuilder.add(key, value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             self.next();
[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] 96 |             let _ = self.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling mini-lsm-starter v0.1.0 (/opt/rustwide/workdir/mini-lsm-starter)
[INFO] [stderr]    Compiling mini-lsm v0.1.0 (/opt/rustwide/workdir/mini-lsm)
[INFO] [stdout] warning: unused import: `std::collections::BTreeMap`
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     use std::collections::BTreeMap;
[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::string`
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 |     use std::string;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `builder` and `iterators`
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:179:61
[INFO] [stdout]     |
[INFO] [stdout] 179 |     use crate::{block::{BlockIterator, Block, BlockBuilder, builder}, iterators};
[INFO] [stdout]     |                                                             ^^^^^^^   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter`
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:180:15
[INFO] [stdout]     |
[INFO] [stdout] 180 |     use std::{iter, sync::Arc, vec};
[INFO] [stdout]     |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::String`
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:311:13
[INFO] [stdout]     |
[INFO] [stdout] 311 |         use std::string::String;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone` and `iter`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{iter, clone};
[INFO] [stdout]   |           ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::debug::as_bytes`
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::debug::as_bytes;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::block::{self, Block};
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:214:13
[INFO] [stdout]     |
[INFO] [stdout] 214 |         let mut block =  builder.build();
[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]    --> mini-lsm-starter/src/block/iterator.rs:235:13
[INFO] [stdout]     |
[INFO] [stdout] 235 |         let mut block =  builder.build();
[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]    --> mini-lsm-starter/src/block/iterator.rs:254:13
[INFO] [stdout]     |
[INFO] [stdout] 254 |         let mut block =  builder.build();
[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]    --> mini-lsm-starter/src/block.rs:136:13
[INFO] [stdout]     |
[INFO] [stdout] 136 |         let mut block =  builder.build();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |         fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]     |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let mut memtable = MemTable::create();
[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]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[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]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[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]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:142:13
[INFO] [stdout]     |
[INFO] [stdout] 142 |         let mut memtable = MemTable::create();
[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]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:149:13
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[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]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:150:13
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `value` is never read
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_storage.rs:65:17
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut value = None;
[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: unused variable: `flush_lock`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let mut flush_table;
[INFO] [stdout]     |             ----^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:186:21
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let mut iter = memtable.scan(lower, upper);
[INFO] [stdout]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:186:17
[INFO] [stdout]     |
[INFO] [stdout] 186 |             let mut iter = memtable.scan(lower, upper);
[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]    --> mini-lsm-starter/src/lsm_storage.rs:193:17
[INFO] [stdout]     |
[INFO] [stdout] 193 |             let mut iter = match lower {
[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]    --> mini-lsm-starter/src/table/builder.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/table/builder.rs:158:9
[INFO] [stdout]     |
[INFO] [stdout] 158 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/table/iterator.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let mut iter = SsTableIterator::create_and_seek_to_first(sst).expect("error");
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         block_builder.add(b"1", b"432");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[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] 132 |         let _ = block_builder.add(b"1", b"432");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |         block_builder.add(b"3", b"432");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let _ = block_builder.add(b"3", b"432");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         block_builder.add(b"2", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 134 |         let _ = block_builder.add(b"2", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:211:9
[INFO] [stdout]     |
[INFO] [stdout] 211 |         builder.add(b"233", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 211 |         let _ = builder.add(b"233", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:212:9
[INFO] [stdout]     |
[INFO] [stdout] 212 |         builder.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let _ = builder.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |         builder.add(b"1", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 230 |         let _ = builder.add(b"1", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |         builder.add(b"2", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 231 |         let _ = builder.add(b"2", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 232 |         builder.add(b"4", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 232 |         let _ = builder.add(b"4", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:233:9
[INFO] [stdout]     |
[INFO] [stdout] 233 |         builder.add(b"5", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let _ = builder.add(b"5", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:234:9
[INFO] [stdout]     |
[INFO] [stdout] 234 |         builder.add(b"8", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let _ = builder.add(b"8", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:248:9
[INFO] [stdout]     |
[INFO] [stdout] 248 |         builder.add(b"key_2", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:249:9
[INFO] [stdout]     |
[INFO] [stdout] 249 |         builder.add(b"key_1", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 249 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:250:9
[INFO] [stdout]     |
[INFO] [stdout] 250 |         builder.add(b"key_8", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 250 |         let _ = builder.add(b"key_8", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:251:9
[INFO] [stdout]     |
[INFO] [stdout] 251 |         builder.add(b"key_4", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 251 |         let _ = builder.add(b"key_4", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:252:9
[INFO] [stdout]     |
[INFO] [stdout] 252 |         builder.add(b"key_5", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 252 |         let _ = builder.add(b"key_5", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |         builder.add(b"key_2", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 283 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:284:9
[INFO] [stdout]     |
[INFO] [stdout] 284 |         builder.add(b"key_1", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 284 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:285:9
[INFO] [stdout]     |
[INFO] [stdout] 285 |         builder.add(b"key_3", b"Hello");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 285 |         let _ = builder.add(b"key_3", b"Hello");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |         builder.add(b"key_8", b"World");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 286 |         let _ = builder.add(b"key_8", b"World");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         builder.add(b"key_4", b"42");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 287 |         let _ = builder.add(b"key_4", b"42");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         builder.add(b"233", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 134 |         let _ = builder.add(b"233", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |         builder.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 135 |         let _ = builder.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |         builder.add(b"233", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let _ = builder.add(b"233", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         builder.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let _ = builder.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |         builder1.add(b"333", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let _ = builder1.add(b"333", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         builder1.add(b"422", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let _ = builder1.add(b"422", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 |         builder2.add(b"733", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let _ = builder2.add(b"733", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         builder2.add(b"922", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let _ = builder2.add(b"922", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |         builder3.add(b"033", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let _ = builder3.add(b"033", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 160 |         builder3.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let _ = builder3.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:133:13
[INFO] [stdout]     |
[INFO] [stdout] 133 |             two_merger_iter.next();
[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] 133 |             let _ = two_merger_iter.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:155:13
[INFO] [stdout]     |
[INFO] [stdout] 155 |             two_merger_iter.next();
[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] 155 |             let _ = two_merger_iter.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     iter.next();
[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] 23 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     iter.next();
[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] 26 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     iter.next();
[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] 29 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     iter.next();
[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] 51 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     iter.next();
[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] 54 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     iter.next();
[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] 57 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         flush_table.flush(&mut sst_builder);
[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] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             self.next();
[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] 113 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.blockbuilder.add(key, value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             self.next();
[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] 96 |             let _ = self.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `ssTable` should have a snake case name
[INFO] [stdout]   --> mini-lsm-starter/src/table/tests.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let ssTable = builder.build_for_test(dir.path().join("1.sst")).unwrap();
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case: `ss_table`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 3.95s
[INFO] running `Command { std: "docker" "inspect" "f2596501e8720b13e77adf46077db90b277d4f1c7a151b795c2d6300decda199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2596501e8720b13e77adf46077db90b277d4f1c7a151b795c2d6300decda199", kill_on_drop: false }`
[INFO] [stdout] f2596501e8720b13e77adf46077db90b277d4f1c7a151b795c2d6300decda199
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 98b815342931c88cc27f98ab2af3f6ad41c974f98594e935269ce7e59627c275
[INFO] running `Command { std: "docker" "start" "-a" "98b815342931c88cc27f98ab2af3f6ad41c974f98594e935269ce7e59627c275", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `borrow::Borrow`
[INFO] [stderr]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stderr]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::borrow::BorrowMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `clone` and `iter`
[INFO] [stderr]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::{iter, clone};
[INFO] [stderr]   |           ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::debug::as_bytes`
[INFO] [stderr]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use crate::debug::as_bytes;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stderr]    |
[INFO] [stderr] 15 | use crate::block::{self, Block};
[INFO] [stderr]    |                    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `value` is never read
[INFO] [stderr]   --> mini-lsm-starter/src/lsm_storage.rs:65:17
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let mut value = None;
[INFO] [stderr]    |                 ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `flush_lock`
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stderr]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stderr]     |
[INFO] [stderr] 127 |         let mut flush_table;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `iter`
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:186:21
[INFO] [stderr]     |
[INFO] [stderr] 186 |             let mut iter = memtable.scan(lower, upper);
[INFO] [stderr]     |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:186:17
[INFO] [stderr]     |
[INFO] [stderr] 186 |             let mut iter = memtable.scan(lower, upper);
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:193:17
[INFO] [stderr]     |
[INFO] [stderr] 193 |             let mut iter = match lower {
[INFO] [stderr]     |                 ----^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stderr]     |
[INFO] [stderr] 113 |             self.next();
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 113 |             let _ = self.next();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             self.blockbuilder.add(key, value);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |             self.next();
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 96 |             let _ = self.next();
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::BTreeMap`
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 127 |     use std::collections::BTreeMap;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::string`
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 |     use std::string;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `borrow::Borrow`
[INFO] [stderr]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `builder` and `iterators`
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:179:61
[INFO] [stderr]     |
[INFO] [stderr] 179 |     use crate::{block::{BlockIterator, Block, BlockBuilder, builder}, iterators};
[INFO] [stderr]     |                                                             ^^^^^^^   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `iter`
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:180:15
[INFO] [stderr]     |
[INFO] [stderr] 180 |     use std::{iter, sync::Arc, vec};
[INFO] [stderr]     |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::string::String`
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:311:13
[INFO] [stderr]     |
[INFO] [stderr] 311 |         use std::string::String;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:214:13
[INFO] [stderr]     |
[INFO] [stderr] 214 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:235:13
[INFO] [stderr]     |
[INFO] [stderr] 235 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:254:13
[INFO] [stderr]     |
[INFO] [stderr] 254 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:147:22
[INFO] [stderr]     |
[INFO] [stderr] 147 |         fn eq(&self, other: &Self) -> bool {
[INFO] [stderr]     |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:111:13
[INFO] [stderr]     |
[INFO] [stderr] 111 |         let mut memtable = MemTable::create();
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:125:13
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:142:13
[INFO] [stderr]     |
[INFO] [stderr] 142 |         let mut memtable = MemTable::create();
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:149:13
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:150:13
[INFO] [stderr]     |
[INFO] [stderr] 150 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `flush_lock`
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stderr]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stderr]     |
[INFO] [stderr] 127 |         let mut flush_table;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/table/builder.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/table/builder.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/table/iterator.rs:192:13
[INFO] [stderr]     |
[INFO] [stderr] 192 |         let mut iter = SsTableIterator::create_and_seek_to_first(sst).expect("error");
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:132:9
[INFO] [stderr]     |
[INFO] [stderr] 132 |         block_builder.add(b"1", b"432");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let _ = block_builder.add(b"1", b"432");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |         block_builder.add(b"3", b"432");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 133 |         let _ = block_builder.add(b"3", b"432");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |         block_builder.add(b"2", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 134 |         let _ = block_builder.add(b"2", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:211:9
[INFO] [stderr]     |
[INFO] [stderr] 211 |         builder.add(b"233", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 211 |         let _ = builder.add(b"233", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:212:9
[INFO] [stderr]     |
[INFO] [stderr] 212 |         builder.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let _ = builder.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:230:9
[INFO] [stderr]     |
[INFO] [stderr] 230 |         builder.add(b"1", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 230 |         let _ = builder.add(b"1", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:231:9
[INFO] [stderr]     |
[INFO] [stderr] 231 |         builder.add(b"2", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 231 |         let _ = builder.add(b"2", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         builder.add(b"4", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 232 |         let _ = builder.add(b"4", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:233:9
[INFO] [stderr]     |
[INFO] [stderr] 233 |         builder.add(b"5", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 233 |         let _ = builder.add(b"5", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         builder.add(b"8", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 234 |         let _ = builder.add(b"8", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:248:9
[INFO] [stderr]     |
[INFO] [stderr] 248 |         builder.add(b"key_2", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 248 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:249:9
[INFO] [stderr]     |
[INFO] [stderr] 249 |         builder.add(b"key_1", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 249 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:250:9
[INFO] [stderr]     |
[INFO] [stderr] 250 |         builder.add(b"key_8", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 250 |         let _ = builder.add(b"key_8", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:251:9
[INFO] [stderr]     |
[INFO] [stderr] 251 |         builder.add(b"key_4", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let _ = builder.add(b"key_4", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 |         builder.add(b"key_5", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 252 |         let _ = builder.add(b"key_5", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:283:9
[INFO] [stderr]     |
[INFO] [stderr] 283 |         builder.add(b"key_2", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 283 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:284:9
[INFO] [stderr]     |
[INFO] [stderr] 284 |         builder.add(b"key_1", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 284 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:285:9
[INFO] [stderr]     |
[INFO] [stderr] 285 |         builder.add(b"key_3", b"Hello");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 285 |         let _ = builder.add(b"key_3", b"Hello");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:286:9
[INFO] [stderr]     |
[INFO] [stderr] 286 |         builder.add(b"key_8", b"World");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 286 |         let _ = builder.add(b"key_8", b"World");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:287:9
[INFO] [stderr]     |
[INFO] [stderr] 287 |         builder.add(b"key_4", b"42");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 287 |         let _ = builder.add(b"key_4", b"42");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |         builder.add(b"233", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 134 |         let _ = builder.add(b"233", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |         builder.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let _ = builder.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |         builder.add(b"233", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let _ = builder.add(b"233", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         builder.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let _ = builder.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:149:9
[INFO] [stderr]     |
[INFO] [stderr] 149 |         builder1.add(b"333", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let _ = builder1.add(b"333", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:150:9
[INFO] [stderr]     |
[INFO] [stderr] 150 |         builder1.add(b"422", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 150 |         let _ = builder1.add(b"422", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |         builder2.add(b"733", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 154 |         let _ = builder2.add(b"733", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 |         builder2.add(b"922", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 155 |         let _ = builder2.add(b"922", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:159:9
[INFO] [stderr]     |
[INFO] [stderr] 159 |         builder3.add(b"033", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 159 |         let _ = builder3.add(b"033", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:160:9
[INFO] [stderr]     |
[INFO] [stderr] 160 |         builder3.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 160 |         let _ = builder3.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:133:13
[INFO] [stderr]     |
[INFO] [stderr] 133 |             two_merger_iter.next();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 133 |             let _ = two_merger_iter.next();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:155:13
[INFO] [stderr]     |
[INFO] [stderr] 155 |             two_merger_iter.next();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 155 |             let _ = two_merger_iter.next();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: variable `ssTable` should have a snake case name
[INFO] [stderr]   --> mini-lsm-starter/src/table/tests.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let ssTable = builder.build_for_test(dir.path().join("1.sst")).unwrap();
[INFO] [stderr]    |         ^^^^^^^ help: convert the identifier to snake case: `ss_table`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mini-lsm-starter` (lib) generated 16 warnings (run `cargo fix --lib -p mini-lsm-starter` to apply 9 suggestions)
[INFO] [stderr] warning: `mini-lsm-starter` (lib test) generated 74 warnings (12 duplicates) (run `cargo fix --lib -p mini-lsm-starter --tests` to apply 20 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm-dcd67443e18eee16)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stderr] 
[INFO] [stdout] test block::tests::test_block_build_single_key ... ok
[INFO] [stderr] thread 'mem_table::tests::test_memtable_flush' (39) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:781:33:
[INFO] [stdout] test block::tests::test_block_build_all ... ok
[INFO] [stderr] unsafe precondition(s) violated: slice::get_unchecked requires that the index is within the slice
[INFO] [stderr] 
[INFO] [stderr] This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x6383106f0622 - std::backtrace_rs::backtrace::libunwind::trace::hcab59e1e990fdc24
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]    1:     0x6383106f0622 - std::backtrace_rs::backtrace::trace_unsynchronized::he24cc57f3d2f47b7
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]    2:     0x6383106f0622 - std::sys::backtrace::_print_fmt::hf8d65ede198eeb54
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:66:9
[INFO] [stderr]    3:     0x6383106f0622 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h67edf0e4d33c343c
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:39:26
[INFO] [stderr]    4:     0x638310700e6f - core::fmt::rt::Argument::fmt::hef94184842aeafdd
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/rt.rs:173:76
[INFO] [stderr]    5:     0x638310700e6f - core::fmt::write::hcf0c66b48a8fa606
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/fmt/mod.rs:1468:25
[INFO] [stderr]    6:     0x6383106bc6b1 - std::io::default_write_fmt::h1ecb8c7cfa7da481
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:639:11
[INFO] [stderr]    7:     0x6383106bc6b1 - std::io::Write::write_fmt::h051fe4a9e4fdbf48
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/io/mod.rs:1954:13
[INFO] [stderr]    8:     0x6383106c9222 - std::sys::backtrace::BacktraceLock::print::h07e5435aa717b414
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:42:9
[INFO] [stderr]    9:     0x6383106ce1af - std::panicking::default_hook::{{closure}}::h91001850288db5f7
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:301:27
[INFO] [stderr]   10:     0x6383106ce009 - std::panicking::default_hook::h2346dbb704ef5512
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:328:9
[INFO] [stderr]   11:     0x63831065594e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h18383b2e29377420
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1999:9
[INFO] [stderr]   12:     0x63831065594e - test::test_main_with_exit_callback::{{closure}}::h272d7ef99aef06dc
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:145:21
[INFO] [stderr]   13:     0x6383106ce91f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h6dba6e441651a0d1
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1999:9
[INFO] [stderr]   14:     0x6383106ce91f - std::panicking::panic_with_hook::hd2b063a6090d23a4
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:842:13
[INFO] [stderr]   15:     0x6383106ce696 - std::panicking::panic_handler::{{closure}}::he666d95f139a333e
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:700:13
[INFO] [stderr]   16:     0x6383106c9359 - std::sys::backtrace::__rust_end_short_backtrace::h631ad224854ebee5
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:174:18
[INFO] [stderr]   17:     0x6383106b073d - __rustc[1d67440d6e82e4f]::rust_begin_unwind
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:698:5
[INFO] [stderr]   18:     0x6383107087cd - core::panicking::panic_nounwind_fmt::runtime::hf619e8fd73995337
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panicking.rs:117:22
[INFO] [stderr]   19:     0x6383107087cd - core::panicking::panic_nounwind_fmt::hc177e1bd7a48be0d
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/intrinsics/mod.rs:2435:9
[INFO] [stderr]   20:     0x63831059aeac - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::precondition_check::h262eace339cb623e
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ub_checks.rs:72:21
[INFO] [stderr]   21:     0x63831059acb9 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::h3b5387071cc86b0f
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ub_checks.rs:77:17
[INFO] [stderr]   22:     0x6383105a4868 - core::slice::<impl [T]>::get_unchecked::h1ef70b93de432d57
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/slice/mod.rs:644:26
[INFO] [stderr]   23:     0x63831058208d - <crossbeam_skiplist::base::Tower<K,V> as core::ops::index::Index<usize>>::index::h982eb6480ede46d5
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:39:32
[INFO] [stderr]   24:     0x638310585243 - crossbeam_skiplist::base::SkipList<K,V>::search_position::h46c47c2a695836c3
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:781:33
[INFO] [stderr]   25:     0x6383105842ed - crossbeam_skiplist::base::SkipList<K,V>::insert_internal::hef1feebd0fcc2137
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:871:31
[INFO] [stderr]   26:     0x6383105859ee - crossbeam_skiplist::base::SkipList<K,V>::insert::hd19f2a4af7a63704
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:1085:14
[INFO] [stderr]   27:     0x63831057dcb3 - crossbeam_skiplist::map::SkipMap<K,V>::insert::h8129d97d1759a844
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/map.rs:375:31
[INFO] [stderr]   28:     0x6383105af510 - mini_lsm::mem_table::MemTable::put::he1941177ff57b96b
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table.rs:42:14
[INFO] [stderr]   29:     0x6383105adeea - mini_lsm::mem_table::tests::test_memtable_flush::h44719991061f9ba7
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:35:14
[INFO] [stderr]   30:     0x6383105aecc7 - mini_lsm::mem_table::tests::test_memtable_flush::{{closure}}::h1fe3a2c1adae3192
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:33:25
[INFO] [stderr]   31:     0x6383105f10f6 - core::ops::function::FnOnce::call_once::ha60c40394e92e7d9
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   32:     0x63831065570b - core::ops::function::FnOnce::call_once::h70887edf07a630ba
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   33:     0x63831065570b - test::__rust_begin_short_backtrace::h27763c4cbbdb8601
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:663:18
[INFO] [stderr]   34:     0x63831066b375 - test::run_test_in_process::{{closure}}::h4dc8bc6d5e3924d3
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:686:74
[INFO] [stderr]   35:     0x63831066b375 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h75905e8ffe81974f
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   36:     0x63831066b375 - std::panicking::catch_unwind::do_call::h0bc60366ba66eba5
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stderr]   37:     0x63831066b375 - std::panicking::catch_unwind::hae1ec7bf94407afa
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stderr]   38:     0x63831066b375 - std::panic::catch_unwind::h0f4ff4773d84d3cd
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stderr]   39:     0x63831066b375 - test::run_test_in_process::h03fbc77ae48b3f10
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:686:27
[INFO] [stderr]   40:     0x63831066b375 - test::run_test::{{closure}}::h83476a9c453dc4d3
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:607:43
[INFO] [stderr]   41:     0x638310641b64 - test::run_test::{{closure}}::h515482ad1e7fe7de
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/test/src/lib.rs:637:41
[INFO] [stderr]   42:     0x638310641b64 - std::sys::backtrace::__rust_begin_short_backtrace::hed09f6ac5fe9d647
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/backtrace.rs:158:18
[INFO] [stderr]   43:     0x63831064542a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h988e2cd969319888
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/thread/mod.rs:559:17
[INFO] [stderr]   44:     0x63831064542a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hd70e28dc46ec20be
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   45:     0x63831064542a - std::panicking::catch_unwind::do_call::hdc29e11311eb7655
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:590:40
[INFO] [stderr]   46:     0x63831064542a - std::panicking::catch_unwind::h9e402d6a96fef41c
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panicking.rs:553:19
[INFO] [stderr]   47:     0x63831064542a - std::panic::catch_unwind::h9213c0c54aec70e0
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/panic.rs:359:14
[INFO] [stderr]   48:     0x63831064542a - std::thread::Builder::spawn_unchecked_::{{closure}}::h6262965869ed2b87
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/thread/mod.rs:557:30
[INFO] [stderr]   49:     0x63831064542a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h05c05ed02619e462
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   50:     0x6383106c44bf - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h2044e71c41d3958a
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/alloc/src/boxed.rs:1985:9
[INFO] [stderr]   51:     0x6383106c44bf - std::sys::thread::unix::Thread::new::thread_start::hf277835320aa8e5a
[INFO] [stderr]                                at /rustc/bb624dcb4c8ab987e10c0808d92d76f3b84dd117/library/std/src/sys/thread/unix.rs:126:17
[INFO] [stderr]   52:     0x7e8b3ad10aa4 - <unknown>
[INFO] [stderr]   53:     0x7e8b3ad9da34 - clone
[INFO] [stderr]   54:                0x0 - <unknown>
[INFO] [stderr] thread caused non-unwinding panic. aborting.
[INFO] [stderr] error: test failed, to rerun pass `-p mini-lsm --lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/mini_lsm-dcd67443e18eee16` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "98b815342931c88cc27f98ab2af3f6ad41c974f98594e935269ce7e59627c275", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98b815342931c88cc27f98ab2af3f6ad41c974f98594e935269ce7e59627c275", kill_on_drop: false }`
[INFO] [stdout] 98b815342931c88cc27f98ab2af3f6ad41c974f98594e935269ce7e59627c275
