[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 master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrelance%2FSolution-v1" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brelance/Solution-v1 on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-6-tc1/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-6-tc1/source/Cargo.toml
[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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ouroboros_macro v0.15.5
[INFO] [stderr]   Downloaded os_pipe v1.1.2
[INFO] [stderr]   Downloaded crossbeam-skiplist v0.1.0
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[INFO] [stderr]   Downloaded moka v0.9.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf3482c0bf34480719048e84a90bf0b9f9dd245ea173be803e146b67f1f05239
[INFO] running `Command { std: "docker" "start" "-a" "bf3482c0bf34480719048e84a90bf0b9f9dd245ea173be803e146b67f1f05239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf3482c0bf34480719048e84a90bf0b9f9dd245ea173be803e146b67f1f05239", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf3482c0bf34480719048e84a90bf0b9f9dd245ea173be803e146b67f1f05239", kill_on_drop: false }`
[INFO] [stdout] bf3482c0bf34480719048e84a90bf0b9f9dd245ea173be803e146b67f1f05239
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc8ee3f14c051a16df273ceebb753153540dfa445c4333087364abe970a73bca
[INFO] running `Command { std: "docker" "start" "-a" "cc8ee3f14c051a16df273ceebb753153540dfa445c4333087364abe970a73bca", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling cfg-if v1.0.0
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[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling rustix v0.36.5
[INFO] [stderr]    Compiling raw-cpuid v10.6.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling crossbeam-skiplist v0.1.0
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
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[INFO] [stderr]    Compiling moka v0.9.6
[INFO] [stderr]    Compiling linux-raw-sys v0.1.4
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling triomphe v0.1.8
[INFO] [stderr]    Compiling tagptr v0.2.0
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling serde_json v1.0.91
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[INFO] [stderr]    Compiling crossbeam-channel v0.5.11
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[INFO] [stderr]    Compiling clap_lex v0.3.0
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling quanta v0.10.1
[INFO] [stderr]    Compiling num_cpus v1.15.0
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[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling os_pipe v1.1.2
[INFO] [stderr]    Compiling console v0.15.2
[INFO] [stderr]    Compiling duct v0.13.6
[INFO] [stderr]    Compiling uuid v1.2.2
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling scheduled-thread-pool v0.2.6
[INFO] [stderr]    Compiling is-terminal v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.195
[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 ouroboros v0.15.5
[INFO] [stderr]    Compiling clap v4.0.32
[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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.31s
[INFO] running `Command { std: "docker" "inspect" "cc8ee3f14c051a16df273ceebb753153540dfa445c4333087364abe970a73bca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc8ee3f14c051a16df273ceebb753153540dfa445c4333087364abe970a73bca", kill_on_drop: false }`
[INFO] [stdout] cc8ee3f14c051a16df273ceebb753153540dfa445c4333087364abe970a73bca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a1a29519f5c550cda680e2f7a9d0e238ff03756537f81a9ad8ad00014622e85b
[INFO] running `Command { std: "docker" "start" "-a" "a1a29519f5c550cda680e2f7a9d0e238ff03756537f81a9ad8ad00014622e85b", kill_on_drop: false }`
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling fastrand v1.8.0
[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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mini-lsm-xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling mini-lsm v0.1.0 (/opt/rustwide/workdir/mini-lsm)
[INFO] [stderr]    Compiling mini-lsm-starter v0.1.0 (/opt/rustwide/workdir/mini-lsm-starter)
[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)]` 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`, `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`, `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)]` 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)]` 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)]` 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)]` 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 74 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `Command { std: "docker" "inspect" "a1a29519f5c550cda680e2f7a9d0e238ff03756537f81a9ad8ad00014622e85b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1a29519f5c550cda680e2f7a9d0e238ff03756537f81a9ad8ad00014622e85b", kill_on_drop: false }`
[INFO] [stdout] a1a29519f5c550cda680e2f7a9d0e238ff03756537f81a9ad8ad00014622e85b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4effd208533197e9cc760a638669025e2283f58a9f8f69868d0e145a1cec239c
[INFO] running `Command { std: "docker" "start" "-a" "4effd208533197e9cc760a638669025e2283f58a9f8f69868d0e145a1cec239c", 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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm-6eedd11412c0bbc9)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stderr] thread 'mem_table::tests::test_memtable_flush' panicked at library/core/src/panicking.rs:219:5:
[INFO] [stdout] test block::tests::test_block_build_single_key ... ok
[INFO] [stderr] unsafe precondition(s) violated: slice::get_unchecked requires that the index is within the slice
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x55c0d12248b5 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stderr]    1:     0x55c0d12248b5 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]    2:     0x55c0d12248b5 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stderr]    3:     0x55c0d12248b5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]    4:     0x55c0d124bfcb - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stderr]    5:     0x55c0d124bfcb - core::fmt::write::h8bcd80919a02be29
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stderr]    6:     0x55c0d1221f2f - std::io::Write::write_fmt::hed769ca6c29434ec
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stderr]    7:     0x55c0d122468e - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]    8:     0x55c0d122468e - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]    9:     0x55c0d12260b9 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stderr]   10:     0x55c0d1225dfd - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:298:9
[INFO] [stderr]   11:     0x55c0d11b5aba - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stderr]   12:     0x55c0d11b5aba - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stderr]   13:     0x55c0d12266bb - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stderr]   14:     0x55c0d12266bb - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stderr]   15:     0x55c0d12263fb - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:656:13
[INFO] [stderr]   16:     0x55c0d1224d79 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stderr]   17:     0x55c0d1226167 - rust_begin_unwind
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stderr]   18:     0x55c0d108a9c0 - core::panicking::panic_nounwind_fmt::runtime::h4b9f1774825d29a1
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:110:18
[INFO] [stderr]   19:     0x55c0d108a9c0 - core::panicking::panic_nounwind_fmt::h7f70629ab29f76f1
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:120:5
[INFO] [stderr]   20:     0x55c0d108aa52 - core::panicking::panic_nounwind::hde0018e2d22904b7
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:219:5
[INFO] [stderr]   21:     0x55c0d114f458 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::precondition_check::h49203962ed79165a
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ub_checks.rs:68:21
[INFO] [stderr]   22:     0x55c0d114f323 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::h8b06a822607e4f68
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ub_checks.rs:75:17
[INFO] [stderr]   23:     0x55c0d10b05d8 - core::slice::<impl [T]>::get_unchecked::hb17c1a82270f1d43
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/slice/mod.rs:686:20
[INFO] [stderr]   24:     0x55c0d10a8ced - <crossbeam_skiplist::base::Tower<K,V> as core::ops::index::Index<usize>>::index::h72d003a99dc7f82d
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:39:18
[INFO] [stderr]   25:     0x55c0d10aeaea - crossbeam_skiplist::base::SkipList<K,V>::search_position::hab2ac9887979f11d
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:781:33
[INFO] [stderr]   26:     0x55c0d10adba9 - crossbeam_skiplist::base::SkipList<K,V>::insert_internal::hd83d48ea07590bfa
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:871:26
[INFO] [stderr]   27:     0x55c0d10af2de - crossbeam_skiplist::base::SkipList<K,V>::insert::hdc4789e3da05901c
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:1085:9
[INFO] [stderr]   28:     0x55c0d10c7b43 - crossbeam_skiplist::map::SkipMap<K,V>::insert::h97f51985ec01d68f
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/map.rs:375:20
[INFO] [stderr]   29:     0x55c0d10c35c0 - mini_lsm::mem_table::MemTable::put::h3fe398c07f2d1b1c
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table.rs:41:9
[INFO] [stderr]   30:     0x55c0d10c50da - mini_lsm::mem_table::tests::test_memtable_flush::h881865c7d1f24c9b
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:35:5
[INFO] [stderr]   31:     0x55c0d10c5077 - mini_lsm::mem_table::tests::test_memtable_flush::{{closure}}::h1cc2a4fb58502959
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:33:25
[INFO] [stderr]   32:     0x55c0d10d2e76 - core::ops::function::FnOnce::call_once::hc3db97bdc2b9406d
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   33:     0x55c0d11ba49b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   34:     0x55c0d11ba49b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stderr]   35:     0x55c0d11b9ba1 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stderr]   36:     0x55c0d11b9ba1 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stderr]   37:     0x55c0d11b9ba1 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stderr]   38:     0x55c0d11b9ba1 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stderr]   39:     0x55c0d11b9ba1 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stderr]   40:     0x55c0d11b9ba1 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stderr]   41:     0x55c0d11b9ba1 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stderr]   42:     0x55c0d1182564 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stderr]   43:     0x55c0d1182564 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stderr]   44:     0x55c0d1186f92 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stderr]   45:     0x55c0d1186f92 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stderr]   46:     0x55c0d1186f92 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stderr]   47:     0x55c0d1186f92 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stderr]   48:     0x55c0d1186f92 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stderr]   49:     0x55c0d1186f92 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stderr]   50:     0x55c0d1186f92 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   51:     0x55c0d122b56b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stderr]   52:     0x55c0d122b56b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stderr]   53:     0x55c0d122b56b - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stderr]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stderr]   54:     0x7f3803ba9ac3 - <unknown>
[INFO] [stderr]   55:     0x7f3803c3aa04 - __clone
[INFO] [stderr]   56:                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-6eedd11412c0bbc9` (signal: 6, SIGABRT: process abort signal)
[INFO] [stdout] test block::tests::test_block_build_all ... 
[INFO] running `Command { std: "docker" "inspect" "4effd208533197e9cc760a638669025e2283f58a9f8f69868d0e145a1cec239c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4effd208533197e9cc760a638669025e2283f58a9f8f69868d0e145a1cec239c", kill_on_drop: false }`
[INFO] [stdout] 4effd208533197e9cc760a638669025e2283f58a9f8f69868d0e145a1cec239c
[INFO] testing brelance/Solution-v1 against try#b642703cf9526da1e72c0b6755753b939a9c6b6d for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrelance%2FSolution-v1" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brelance/Solution-v1 on toolchain b642703cf9526da1e72c0b6755753b939a9c6b6d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-6-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-6-tc2/source/Cargo.toml
[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" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9ee02141b9eeb4c59a53c88263aad78493d8fbf3b6d17a992d53453abfab502
[INFO] running `Command { std: "docker" "start" "-a" "f9ee02141b9eeb4c59a53c88263aad78493d8fbf3b6d17a992d53453abfab502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9ee02141b9eeb4c59a53c88263aad78493d8fbf3b6d17a992d53453abfab502", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9ee02141b9eeb4c59a53c88263aad78493d8fbf3b6d17a992d53453abfab502", kill_on_drop: false }`
[INFO] [stdout] f9ee02141b9eeb4c59a53c88263aad78493d8fbf3b6d17a992d53453abfab502
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 095d08651c04c0848a73090458576d3a29728d78286ca2a05d9a38f3469bb7f0
[INFO] running `Command { std: "docker" "start" "-a" "095d08651c04c0848a73090458576d3a29728d78286ca2a05d9a38f3469bb7f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[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 smallvec v1.10.0
[INFO] [stderr]    Compiling rustix v0.36.5
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling lock_api v0.4.9
[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 serde v1.0.195
[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 linux-raw-sys v0.1.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling triomphe v0.1.8
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling tagptr v0.2.0
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling arc-swap v1.5.1
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling ryu v1.0.12
[INFO] [stderr]    Compiling clap_lex v0.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling crossbeam-channel v0.5.11
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling quanta v0.10.1
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling shared_child v1.0.0
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling os_pipe v1.1.2
[INFO] [stderr]    Compiling console v0.15.2
[INFO] [stderr]    Compiling duct v0.13.6
[INFO] [stderr]    Compiling uuid v1.2.2
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling scheduled-thread-pool v0.2.6
[INFO] [stderr]    Compiling is-terminal v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.195
[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 ouroboros v0.15.5
[INFO] [stderr]    Compiling clap v4.0.32
[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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.14s
[INFO] running `Command { std: "docker" "inspect" "095d08651c04c0848a73090458576d3a29728d78286ca2a05d9a38f3469bb7f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "095d08651c04c0848a73090458576d3a29728d78286ca2a05d9a38f3469bb7f0", kill_on_drop: false }`
[INFO] [stdout] 095d08651c04c0848a73090458576d3a29728d78286ca2a05d9a38f3469bb7f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b9e984d4bf992d33db4e508ab7df5917f09374fc23fbb5cdcb0cc2524ac0c75
[INFO] running `Command { std: "docker" "start" "-a" "2b9e984d4bf992d33db4e508ab7df5917f09374fc23fbb5cdcb0cc2524ac0c75", kill_on_drop: false }`
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling fastrand v1.8.0
[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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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 mini-lsm-xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling mini-lsm v0.1.0 (/opt/rustwide/workdir/mini-lsm)
[INFO] [stderr]    Compiling mini-lsm-starter v0.1.0 (/opt/rustwide/workdir/mini-lsm-starter)
[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)]` 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`, `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`, `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)]` 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)]` 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)]` 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)]` 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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 74 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.98s
[INFO] running `Command { std: "docker" "inspect" "2b9e984d4bf992d33db4e508ab7df5917f09374fc23fbb5cdcb0cc2524ac0c75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b9e984d4bf992d33db4e508ab7df5917f09374fc23fbb5cdcb0cc2524ac0c75", kill_on_drop: false }`
[INFO] [stdout] 2b9e984d4bf992d33db4e508ab7df5917f09374fc23fbb5cdcb0cc2524ac0c75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+b642703cf9526da1e72c0b6755753b939a9c6b6d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9f01b15f99fb53221cada8399d908922d922b0406a42de23f02301c0e67b2a56
[INFO] running `Command { std: "docker" "start" "-a" "9f01b15f99fb53221cada8399d908922d922b0406a42de23f02301c0e67b2a56", 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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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)]` 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`, `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)]` 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)]` 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)]` 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)]` 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 0.07s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm-6eedd11412c0bbc9)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test block::tests::test_block_build_single_key ... ok
[INFO] [stderr] thread 'mem_table::tests::test_memtable_flush' panicked at library/core/src/panicking.rs:219:5:
[INFO] [stdout] test block::tests::test_block_build_full ... ok
[INFO] [stderr] unsafe precondition(s) violated: slice::get_unchecked requires that the index is within the slice
[INFO] [stderr] stack backtrace:
[INFO] [stderr]    0:     0x5593bdf9f7f5 - std::backtrace_rs::backtrace::libunwind::trace::he49dc9a9e3164223
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stderr]    1:     0x5593bdf9f7f5 - std::backtrace_rs::backtrace::trace_unsynchronized::h3a3e77c68030aa6b
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stderr]    2:     0x5593bdf9f7f5 - std::sys_common::backtrace::_print_fmt::h9479ad2f99afd5d4
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stderr]    3:     0x5593bdf9f7f5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hfb01aa1fa3fb1821
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stderr]    4:     0x5593bdfc6eab - core::fmt::rt::Argument::fmt::h125e56152abbc1c3
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/rt.rs:165:63
[INFO] [stderr]    5:     0x5593bdfc6eab - core::fmt::write::hb0ab4ff05ccfe741
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/fmt/mod.rs:1169:21
[INFO] [stderr]    6:     0x5593bdf9cdbf - std::io::Write::write_fmt::h456b7988df61daf3
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/io/mod.rs:1835:15
[INFO] [stderr]    7:     0x5593bdf9f5ce - std::sys_common::backtrace::_print::h79ca548f3a2adf4b
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stderr]    8:     0x5593bdf9f5ce - std::sys_common::backtrace::print::h9aebf997b2fea2d3
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stderr]    9:     0x5593bdfa0f39 - std::panicking::default_hook::{{closure}}::h68a0954af2694526
[INFO] [stderr]   10:     0x5593bdfa0d08 - std::panicking::default_hook::h5be50cc6849ffb00
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:298:9
[INFO] [stderr]   11:     0x5593bdf33b2f - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd874405dcbd1d3ed
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stderr]   12:     0x5593bdf33b2f - test::test_main::{{closure}}::h4f26a9df34a84b94
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:137:21
[INFO] [stderr]   13:     0x5593bdfa153b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h00e96d9c62aa9a12
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2036:9
[INFO] [stderr]   14:     0x5593bdfa153b - std::panicking::rust_panic_with_hook::h3c0df6036729334c
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:799:13
[INFO] [stderr]   15:     0x5593bdfa127b - std::panicking::begin_panic_handler::{{closure}}::ha3a21e93c4cfd807
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:656:13
[INFO] [stderr]   16:     0x5593bdf9fcb9 - std::sys_common::backtrace::__rust_end_short_backtrace::h19508a8f8ae71dc9
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stderr]   17:     0x5593bdfa0fe7 - rust_begin_unwind
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:652:5
[INFO] [stderr]   18:     0x5593bde069a0 - core::panicking::panic_nounwind_fmt::runtime::h5a694fc2dbb2d2f2
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:110:18
[INFO] [stderr]   19:     0x5593bde069a0 - core::panicking::panic_nounwind_fmt::hdd1d11fcfd7ed294
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:120:5
[INFO] [stderr]   20:     0x5593bde06a32 - core::panicking::panic_nounwind::h8259b34807f64d0c
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panicking.rs:219:5
[INFO] [stderr]   21:     0x5593bde79648 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::precondition_check::h90f932859d5d4a0d
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ub_checks.rs:68:21
[INFO] [stderr]   22:     0x5593bde79513 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::h9568964fba6b3e1b
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ub_checks.rs:75:17
[INFO] [stderr]   23:     0x5593bdea38e8 - core::slice::<impl [T]>::get_unchecked::h735a5d1c1c2fc96a
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/slice/mod.rs:686:20
[INFO] [stderr]   24:     0x5593bde9b47d - <crossbeam_skiplist::base::Tower<K,V> as core::ops::index::Index<usize>>::index::h022f8f664dc8c924
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:39:18
[INFO] [stderr]   25:     0x5593bdea121a - crossbeam_skiplist::base::SkipList<K,V>::search_position::h2bd3c7b057120927
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:781:33
[INFO] [stderr]   26:     0x5593bdea02d9 - crossbeam_skiplist::base::SkipList<K,V>::insert_internal::hc21daf8302affee1
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:871:26
[INFO] [stderr]   27:     0x5593bdea1a0e - crossbeam_skiplist::base::SkipList<K,V>::insert::heb51df4e89141dab
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/base.rs:1085:9
[INFO] [stderr]   28:     0x5593bdea9e43 - crossbeam_skiplist::map::SkipMap<K,V>::insert::hc94f40d27a452030
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/crossbeam-skiplist-0.1.0/src/map.rs:375:20
[INFO] [stderr]   29:     0x5593bde4d030 - mini_lsm::mem_table::MemTable::put::h4a96cbcbcca535e9
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table.rs:41:9
[INFO] [stderr]   30:     0x5593bde4f0aa - mini_lsm::mem_table::tests::test_memtable_flush::hc09fda2ea931c7f8
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:35:5
[INFO] [stderr]   31:     0x5593bde4f047 - mini_lsm::mem_table::tests::test_memtable_flush::{{closure}}::h886414da1d3522f4
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:33:25
[INFO] [stderr]   32:     0x5593bde86bb6 - core::ops::function::FnOnce::call_once::hdf75836608239d47
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   33:     0x5593bdf3844b - core::ops::function::FnOnce::call_once::h18c6bf92212b87a4
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   34:     0x5593bdf3844b - test::__rust_begin_short_backtrace::hdcf0edcfa9080086
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:625:18
[INFO] [stderr]   35:     0x5593bdf37b11 - test::run_test_in_process::{{closure}}::heac2c4eb375d2d10
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:60
[INFO] [stderr]   36:     0x5593bdf37b11 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0289bafc8a1cc004
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stderr]   37:     0x5593bdf37b11 - std::panicking::try::do_call::h5e158f1ad8a5f983
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stderr]   38:     0x5593bdf37b11 - std::panicking::try::hea3411d60321c4de
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stderr]   39:     0x5593bdf37b11 - std::panic::catch_unwind::hafb7bb18bc47bbc7
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stderr]   40:     0x5593bdf37b11 - test::run_test_in_process::h74dd138dc7762d99
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:648:27
[INFO] [stderr]   41:     0x5593bdf37b11 - test::run_test::{{closure}}::h6b390822e63606cf
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:569:43
[INFO] [stderr]   42:     0x5593bdf004e4 - test::run_test::{{closure}}::h6e11dba8131d354b
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/test/src/lib.rs:599:41
[INFO] [stderr]   43:     0x5593bdf004e4 - std::sys_common::backtrace::__rust_begin_short_backtrace::ha71b3541b59bdbbb
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stderr]   44:     0x5593bdf04fb2 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hef92127c5ef9e53c
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:542:17
[INFO] [stderr]   45:     0x5593bdf04fb2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h859c109f9d11c92b
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stderr]   46:     0x5593bdf04fb2 - std::panicking::try::do_call::hbf534c458cd858f0
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:559:40
[INFO] [stderr]   47:     0x5593bdf04fb2 - std::panicking::try::h65c18365a7b9ad90
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panicking.rs:523:19
[INFO] [stderr]   48:     0x5593bdf04fb2 - std::panic::catch_unwind::h21b25d4c69478c39
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/panic.rs:149:14
[INFO] [stderr]   49:     0x5593bdf04fb2 - std::thread::Builder::spawn_unchecked_::{{closure}}::h23335f620275a9bf
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/thread/mod.rs:541:30
[INFO] [stderr]   50:     0x5593bdf04fb2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hb491dc55513e9b7c
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   51:     0x5593bdfa63db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h41b39260afcffdc9
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stderr]   52:     0x5593bdfa63db - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6694c8dc6dd010c4
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/alloc/src/boxed.rs:2022:9
[INFO] [stderr]   53:     0x5593bdfa63db - std::sys::pal::unix::thread::Thread::new::thread_start::hf16038e1c8e19c99
[INFO] [stderr]                                at /rustc/b642703cf9526da1e72c0b6755753b939a9c6b6d/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stderr]   54:     0x7f29a6dd7ac3 - <unknown>
[INFO] [stderr]   55:     0x7f29a6e68a04 - __clone
[INFO] [stderr]   56:                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-6eedd11412c0bbc9` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "9f01b15f99fb53221cada8399d908922d922b0406a42de23f02301c0e67b2a56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f01b15f99fb53221cada8399d908922d922b0406a42de23f02301c0e67b2a56", kill_on_drop: false }`
[INFO] [stdout] 9f01b15f99fb53221cada8399d908922d922b0406a42de23f02301c0e67b2a56
