[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 1.93.0 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrelance%2FSolution-v1" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
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[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-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brelance/Solution-v1 on toolchain 1.93.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.93.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brelance/Solution-v1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.93.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+1.93.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa6c2cf0d8573901405a76811a40d75200e5c6d773363045889f92e015f32fe2
[INFO] running `Command { std: "docker" "start" "-a" "aa6c2cf0d8573901405a76811a40d75200e5c6d773363045889f92e015f32fe2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa6c2cf0d8573901405a76811a40d75200e5c6d773363045889f92e015f32fe2", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+1.93.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 127abb6c4b491dfba916f83d0f0ff6a02cdc813dd5d71a9e81718499af5fa8ad
[INFO] running `Command { std: "docker" "start" "-a" "127abb6c4b491dfba916f83d0f0ff6a02cdc813dd5d71a9e81718499af5fa8ad", kill_on_drop: false }`
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[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.6
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[INFO] [stderr]    Compiling parking_lot_core v0.9.5
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[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling memoffset v0.7.1
[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 crossbeam-skiplist v0.1.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling moka v0.9.6
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling crossbeam-channel v0.5.11
[INFO] [stderr]    Compiling triomphe v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling tagptr v0.2.0
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling aliasable v0.1.3
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[INFO] [stderr]    Compiling uuid v1.2.2
[INFO] [stderr]    Compiling duct v0.13.6
[INFO] [stderr]    Compiling parking_lot v0.12.1
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[INFO] [stderr]    Compiling is-terminal v0.4.2
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.38
[INFO] [stderr]    Compiling ouroboros_macro v0.15.5
[INFO] [stderr]    Compiling clap_derive v4.0.21
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[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone` and `iter`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{iter, clone};
[INFO] [stdout]   |           ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::debug::as_bytes`
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::debug::as_bytes;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::block::{self, Block};
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `value` is never read
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_storage.rs:65:25
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut value = None;
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let mut flush_table;
[INFO] [stdout]     |             ----^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `flush_lock`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs: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 variable: `iter`
[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]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             self.next();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.blockbuilder.add(key, value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             self.next();
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 96 |             let _ = self.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.43s
[INFO] running `Command { std: "docker" "inspect" "127abb6c4b491dfba916f83d0f0ff6a02cdc813dd5d71a9e81718499af5fa8ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "127abb6c4b491dfba916f83d0f0ff6a02cdc813dd5d71a9e81718499af5fa8ad", kill_on_drop: false }`
[INFO] [stdout] 127abb6c4b491dfba916f83d0f0ff6a02cdc813dd5d71a9e81718499af5fa8ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+1.93.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50e68e02d3a77ad4da92152a089e85dd6efe4ea5ccb0d97602570a2f889f1bc2
[INFO] running `Command { std: "docker" "start" "-a" "50e68e02d3a77ad4da92152a089e85dd6efe4ea5ccb0d97602570a2f889f1bc2", kill_on_drop: false }`
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone` and `iter`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{iter, clone};
[INFO] [stdout]   |           ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::debug::as_bytes`
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::debug::as_bytes;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::block::{self, Block};
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mini-lsm-xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stdout] warning: value assigned to `value` is never read
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_storage.rs:65:25
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut value = None;
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stdout]     |
[INFO] [stdout] 127 |         let mut flush_table;
[INFO] [stdout]     |             ----^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `flush_lock`
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stdout]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs: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 variable: `iter`
[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]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             self.next();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.blockbuilder.add(key, value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             self.next();
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 96 |             let _ = self.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling mini-lsm-starter v0.1.0 (/opt/rustwide/workdir/mini-lsm-starter)
[INFO] [stderr]    Compiling mini-lsm v0.1.0 (/opt/rustwide/workdir/mini-lsm)
[INFO] [stdout] warning: unused import: `std::collections::BTreeMap`
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     use std::collections::BTreeMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string`
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 128 |     use std::string;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `builder` and `iterators`
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:179:61
[INFO] [stdout]     |
[INFO] [stdout] 179 |     use crate::{block::{BlockIterator, Block, BlockBuilder, builder}, iterators};
[INFO] [stdout]     |                                                             ^^^^^^^   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iter`
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:180:15
[INFO] [stdout]     |
[INFO] [stdout] 180 |     use std::{iter, sync::Arc, vec};
[INFO] [stdout]     |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::String`
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:311:13
[INFO] [stdout]     |
[INFO] [stdout] 311 |         use std::string::String;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone` and `iter`
[INFO] [stdout]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{iter, clone};
[INFO] [stdout]   |           ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::debug::as_bytes`
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::debug::as_bytes;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stdout]    |
[INFO] [stdout] 15 | use crate::block::{self, Block};
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:214:13
[INFO] [stdout]     |
[INFO] [stdout] 214 |         let mut block =  builder.build();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:235:13
[INFO] [stdout]     |
[INFO] [stdout] 235 |         let mut block =  builder.build();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:254:13
[INFO] [stdout]     |
[INFO] [stdout] 254 |         let mut block =  builder.build();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:136:13
[INFO] [stdout]     |
[INFO] [stdout] 136 |         let mut block =  builder.build();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:147:22
[INFO] [stdout]     |
[INFO] [stdout] 147 |         fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]     |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:111:13
[INFO] [stdout]     |
[INFO] [stdout] 111 |         let mut memtable = MemTable::create();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:126:13
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:142:13
[INFO] [stdout]     |
[INFO] [stdout] 142 |         let mut memtable = MemTable::create();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:149:13
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:150:13
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `value` is never read
[INFO] [stdout]   --> mini-lsm-starter/src/lsm_storage.rs:65:25
[INFO] [stdout]    |
[INFO] [stdout] 65 |         let mut value = None;
[INFO] [stdout]    |                         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 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: `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: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 variable: `iter`
[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]     |                 ^^^^^^^^ 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/table/builder.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 143 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/table/builder.rs:158:9
[INFO] [stdout]     |
[INFO] [stdout] 158 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> mini-lsm-starter/src/table/iterator.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         let mut iter = SsTableIterator::create_and_seek_to_first(sst).expect("error");
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         block_builder.add(b"1", b"432");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 132 |         let _ = block_builder.add(b"1", b"432");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:133:9
[INFO] [stdout]     |
[INFO] [stdout] 133 |         block_builder.add(b"3", b"432");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 133 |         let _ = block_builder.add(b"3", b"432");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/builder.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         block_builder.add(b"2", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 134 |         let _ = block_builder.add(b"2", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:211:9
[INFO] [stdout]     |
[INFO] [stdout] 211 |         builder.add(b"233", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 211 |         let _ = builder.add(b"233", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:212:9
[INFO] [stdout]     |
[INFO] [stdout] 212 |         builder.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let _ = builder.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |         builder.add(b"1", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 230 |         let _ = builder.add(b"1", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 231 |         builder.add(b"2", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 231 |         let _ = builder.add(b"2", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 232 |         builder.add(b"4", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 232 |         let _ = builder.add(b"4", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:233:9
[INFO] [stdout]     |
[INFO] [stdout] 233 |         builder.add(b"5", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let _ = builder.add(b"5", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:234:9
[INFO] [stdout]     |
[INFO] [stdout] 234 |         builder.add(b"8", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let _ = builder.add(b"8", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:248:9
[INFO] [stdout]     |
[INFO] [stdout] 248 |         builder.add(b"key_2", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:249:9
[INFO] [stdout]     |
[INFO] [stdout] 249 |         builder.add(b"key_1", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 249 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:250:9
[INFO] [stdout]     |
[INFO] [stdout] 250 |         builder.add(b"key_8", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 250 |         let _ = builder.add(b"key_8", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:251:9
[INFO] [stdout]     |
[INFO] [stdout] 251 |         builder.add(b"key_4", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 251 |         let _ = builder.add(b"key_4", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:252:9
[INFO] [stdout]     |
[INFO] [stdout] 252 |         builder.add(b"key_5", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 252 |         let _ = builder.add(b"key_5", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:283:9
[INFO] [stdout]     |
[INFO] [stdout] 283 |         builder.add(b"key_2", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 283 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:284:9
[INFO] [stdout]     |
[INFO] [stdout] 284 |         builder.add(b"key_1", b"1");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 284 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:285:9
[INFO] [stdout]     |
[INFO] [stdout] 285 |         builder.add(b"key_3", b"Hello");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 285 |         let _ = builder.add(b"key_3", b"Hello");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:286:9
[INFO] [stdout]     |
[INFO] [stdout] 286 |         builder.add(b"key_8", b"World");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 286 |         let _ = builder.add(b"key_8", b"World");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block/iterator.rs:287:9
[INFO] [stdout]     |
[INFO] [stdout] 287 |         builder.add(b"key_4", b"42");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 287 |         let _ = builder.add(b"key_4", b"42");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:134:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |         builder.add(b"233", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 134 |         let _ = builder.add(b"233", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 135 |         builder.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 135 |         let _ = builder.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |         builder.add(b"233", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let _ = builder.add(b"233", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         builder.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let _ = builder.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 |         builder1.add(b"333", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 149 |         let _ = builder1.add(b"333", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:150:9
[INFO] [stdout]     |
[INFO] [stdout] 150 |         builder1.add(b"422", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 150 |         let _ = builder1.add(b"422", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:154:9
[INFO] [stdout]     |
[INFO] [stdout] 154 |         builder2.add(b"733", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let _ = builder2.add(b"733", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         builder2.add(b"922", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let _ = builder2.add(b"922", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |         builder3.add(b"033", b"233333");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let _ = builder3.add(b"033", b"233333");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/block.rs:160:9
[INFO] [stdout]     |
[INFO] [stdout] 160 |         builder3.add(b"122", b"122222");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let _ = builder3.add(b"122", b"122222");
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:133:13
[INFO] [stdout]     |
[INFO] [stdout] 133 |             two_merger_iter.next();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 133 |             let _ = two_merger_iter.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:155:13
[INFO] [stdout]     |
[INFO] [stdout] 155 |             two_merger_iter.next();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 155 |             let _ = two_merger_iter.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     iter.next();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     iter.next();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     iter.next();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     iter.next();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     iter.next();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:57:5
[INFO] [stdout]    |
[INFO] [stdout] 57 |     iter.next();
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let _ = iter.next();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |         flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stdout]     |
[INFO] [stdout] 113 |             self.next();
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 113 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |             self.blockbuilder.add(key, value);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stdout]    |
[INFO] [stdout] 96 |             self.next();
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 96 |             let _ = self.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `ssTable` should have a snake case name
[INFO] [stdout]   --> mini-lsm-starter/src/table/tests.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let ssTable = builder.build_for_test(dir.path().join("1.sst")).unwrap();
[INFO] [stdout]    |         ^^^^^^^ help: convert the identifier to snake case: `ss_table`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 4.14s
[INFO] running `Command { std: "docker" "inspect" "50e68e02d3a77ad4da92152a089e85dd6efe4ea5ccb0d97602570a2f889f1bc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50e68e02d3a77ad4da92152a089e85dd6efe4ea5ccb0d97602570a2f889f1bc2", kill_on_drop: false }`
[INFO] [stdout] 50e68e02d3a77ad4da92152a089e85dd6efe4ea5ccb0d97602570a2f889f1bc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+1.93.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2faf93ccf51111caf2e642a7beadcd758890705e36106817e513ae51c11fcfcd
[INFO] running `Command { std: "docker" "start" "-a" "2faf93ccf51111caf2e642a7beadcd758890705e36106817e513ae51c11fcfcd", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `borrow::Borrow`
[INFO] [stderr]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stderr]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::borrow::BorrowMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Deref`
[INFO] [stderr]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::Deref;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `clone` and `iter`
[INFO] [stderr]  --> mini-lsm-starter/src/iterators/merge_iterator.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::{iter, clone};
[INFO] [stderr]   |           ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::debug::as_bytes`
[INFO] [stderr]   --> mini-lsm-starter/src/lsm_iterator.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | use crate::debug::as_bytes;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]   --> mini-lsm-starter/src/table.rs:15:20
[INFO] [stderr]    |
[INFO] [stderr] 15 | use crate::block::{self, Block};
[INFO] [stderr]    |                    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `value` is never read
[INFO] [stderr]   --> mini-lsm-starter/src/lsm_storage.rs:65:25
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let mut value = None;
[INFO] [stderr]    |                         ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:127:13
[INFO] [stderr]     |
[INFO] [stderr] 127 |         let mut flush_table;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `flush_lock`
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let flush_lock = self.flush_lock.lock();
[INFO] [stderr]     |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_flush_lock`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs: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 variable: `iter`
[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]     |                 ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/mem_table.rs:113:13
[INFO] [stderr]     |
[INFO] [stderr] 113 |             self.next();
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 113 |             let _ = self.next();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/table/builder.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             self.blockbuilder.add(key, value);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 57 |             let _ = self.blockbuilder.add(key, value);
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/table/iterator.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |             self.next();
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 96 |             let _ = self.next();
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::BTreeMap`
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:127:9
[INFO] [stderr]     |
[INFO] [stderr] 127 |     use std::collections::BTreeMap;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::string`
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 |     use std::string;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `borrow::Borrow`
[INFO] [stderr]  --> mini-lsm-starter/src/block/iterator.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{borrow::Borrow, sync::Arc};
[INFO] [stderr]   |           ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `builder` and `iterators`
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:179:61
[INFO] [stderr]     |
[INFO] [stderr] 179 |     use crate::{block::{BlockIterator, Block, BlockBuilder, builder}, iterators};
[INFO] [stderr]     |                                                             ^^^^^^^   ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `iter`
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:180:15
[INFO] [stderr]     |
[INFO] [stderr] 180 |     use std::{iter, sync::Arc, vec};
[INFO] [stderr]     |               ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::string::String`
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:311:13
[INFO] [stderr]     |
[INFO] [stderr] 311 |         use std::string::String;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:214:13
[INFO] [stderr]     |
[INFO] [stderr] 214 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:235:13
[INFO] [stderr]     |
[INFO] [stderr] 235 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:254:13
[INFO] [stderr]     |
[INFO] [stderr] 254 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let mut block =  builder.build();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `other`
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:147:22
[INFO] [stderr]     |
[INFO] [stderr] 147 |         fn eq(&self, other: &Self) -> bool {
[INFO] [stderr]     |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:111:13
[INFO] [stderr]     |
[INFO] [stderr] 111 |         let mut memtable = MemTable::create();
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:125:13
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:142:13
[INFO] [stderr]     |
[INFO] [stderr] 142 |         let mut memtable = MemTable::create();
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:149:13
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let mut mem_iter = memtable.scan(std::ops::Bound::Included(b"1"), std::ops::Bound::Included(b"2"));
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:150:13
[INFO] [stderr]     |
[INFO] [stderr] 150 |         let mut sst_iter = SsTableIterator::create_and_seek_to_first(Arc::new(table))?;
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 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: 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/table/builder.rs:143:9
[INFO] [stderr]     |
[INFO] [stderr] 143 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/table/builder.rs:158:9
[INFO] [stderr]     |
[INFO] [stderr] 158 |     let mut table: SsTable = builder.build(1, None, path).unwrap();
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> mini-lsm-starter/src/table/iterator.rs:192:13
[INFO] [stderr]     |
[INFO] [stderr] 192 |         let mut iter = SsTableIterator::create_and_seek_to_first(sst).expect("error");
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:132:9
[INFO] [stderr]     |
[INFO] [stderr] 132 |         block_builder.add(b"1", b"432");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 132 |         let _ = block_builder.add(b"1", b"432");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:133:9
[INFO] [stderr]     |
[INFO] [stderr] 133 |         block_builder.add(b"3", b"432");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 133 |         let _ = block_builder.add(b"3", b"432");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/builder.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |         block_builder.add(b"2", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 134 |         let _ = block_builder.add(b"2", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:211:9
[INFO] [stderr]     |
[INFO] [stderr] 211 |         builder.add(b"233", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 211 |         let _ = builder.add(b"233", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:212:9
[INFO] [stderr]     |
[INFO] [stderr] 212 |         builder.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 212 |         let _ = builder.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:230:9
[INFO] [stderr]     |
[INFO] [stderr] 230 |         builder.add(b"1", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 230 |         let _ = builder.add(b"1", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:231:9
[INFO] [stderr]     |
[INFO] [stderr] 231 |         builder.add(b"2", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 231 |         let _ = builder.add(b"2", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |         builder.add(b"4", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 232 |         let _ = builder.add(b"4", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:233:9
[INFO] [stderr]     |
[INFO] [stderr] 233 |         builder.add(b"5", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 233 |         let _ = builder.add(b"5", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:234:9
[INFO] [stderr]     |
[INFO] [stderr] 234 |         builder.add(b"8", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 234 |         let _ = builder.add(b"8", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:248:9
[INFO] [stderr]     |
[INFO] [stderr] 248 |         builder.add(b"key_2", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 248 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:249:9
[INFO] [stderr]     |
[INFO] [stderr] 249 |         builder.add(b"key_1", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 249 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:250:9
[INFO] [stderr]     |
[INFO] [stderr] 250 |         builder.add(b"key_8", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 250 |         let _ = builder.add(b"key_8", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:251:9
[INFO] [stderr]     |
[INFO] [stderr] 251 |         builder.add(b"key_4", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let _ = builder.add(b"key_4", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 |         builder.add(b"key_5", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 252 |         let _ = builder.add(b"key_5", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:283:9
[INFO] [stderr]     |
[INFO] [stderr] 283 |         builder.add(b"key_2", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 283 |         let _ = builder.add(b"key_2", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:284:9
[INFO] [stderr]     |
[INFO] [stderr] 284 |         builder.add(b"key_1", b"1");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 284 |         let _ = builder.add(b"key_1", b"1");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:285:9
[INFO] [stderr]     |
[INFO] [stderr] 285 |         builder.add(b"key_3", b"Hello");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 285 |         let _ = builder.add(b"key_3", b"Hello");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:286:9
[INFO] [stderr]     |
[INFO] [stderr] 286 |         builder.add(b"key_8", b"World");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 286 |         let _ = builder.add(b"key_8", b"World");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block/iterator.rs:287:9
[INFO] [stderr]     |
[INFO] [stderr] 287 |         builder.add(b"key_4", b"42");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 287 |         let _ = builder.add(b"key_4", b"42");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:134:9
[INFO] [stderr]     |
[INFO] [stderr] 134 |         builder.add(b"233", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 134 |         let _ = builder.add(b"233", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 |         builder.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 135 |         let _ = builder.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:144:9
[INFO] [stderr]     |
[INFO] [stderr] 144 |         builder.add(b"233", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let _ = builder.add(b"233", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         builder.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let _ = builder.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:149:9
[INFO] [stderr]     |
[INFO] [stderr] 149 |         builder1.add(b"333", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let _ = builder1.add(b"333", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:150:9
[INFO] [stderr]     |
[INFO] [stderr] 150 |         builder1.add(b"422", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 150 |         let _ = builder1.add(b"422", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |         builder2.add(b"733", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 154 |         let _ = builder2.add(b"733", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 |         builder2.add(b"922", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 155 |         let _ = builder2.add(b"922", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:159:9
[INFO] [stderr]     |
[INFO] [stderr] 159 |         builder3.add(b"033", b"233333");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 159 |         let _ = builder3.add(b"033", b"233333");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `BlockBuilder::add` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/block.rs:160:9
[INFO] [stderr]     |
[INFO] [stderr] 160 |         builder3.add(b"122", b"122222");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 160 |         let _ = builder3.add(b"122", b"122222");
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:133:13
[INFO] [stderr]     |
[INFO] [stderr] 133 |             two_merger_iter.next();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 133 |             let _ = two_merger_iter.next();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/two_merge_iterator.rs:155:13
[INFO] [stderr]     |
[INFO] [stderr] 155 |             two_merger_iter.next();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 155 |             let _ = two_merger_iter.next();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     iter.next();
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let _ = iter.next();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:145:9
[INFO] [stderr]     |
[INFO] [stderr] 145 |         flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let _ = flush_table.flush(&mut sst_builder);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: variable `ssTable` should have a snake case name
[INFO] [stderr]   --> mini-lsm-starter/src/table/tests.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let ssTable = builder.build_for_test(dir.path().join("1.sst")).unwrap();
[INFO] [stderr]    |         ^^^^^^^ help: convert the identifier to snake case: `ss_table`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mini-lsm-starter` (lib) generated 16 warnings (run `cargo fix --lib -p mini-lsm-starter` to apply 11 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 22 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm-9a2b717d7694824e)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test block::tests::test_block_build_single_key ... ok
[INFO] [stderr] 
[INFO] [stderr] thread 'mem_table::tests::test_memtable_flush' (40) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:781:33:
[INFO] [stderr] unsafe precondition(s) violated: slice::get_unchecked requires that the index is within the slice
[INFO] [stderr] 
[INFO] [stderr] This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.
[INFO] [stderr] stack backtrace:
[INFO] [stdout] test block::tests::test_block_build_all ... ok
[INFO] [stderr]    0:     0x59c67a38ab72 - std::backtrace_rs::backtrace::libunwind::trace::h90e89fac33585832
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]    1:     0x59c67a38ab72 - std::backtrace_rs::backtrace::trace_unsynchronized::heebcf2380a8e7359
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]    2:     0x59c67a38ab72 - std::sys::backtrace::_print_fmt::hdf3e2a22d2f810db
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/sys/backtrace.rs:68:9
[INFO] [stderr]    3:     0x59c67a38ab72 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hac1d885928ba8582
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/sys/backtrace.rs:38:26
[INFO] [stderr]    4:     0x59c67a39ae57 - core::fmt::rt::Argument::fmt::h6901eb7c19abebe8
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]    5:     0x59c67a39ae57 - core::fmt::write::h83ebb4d32483be9e
[INFO] [stderr]    6:     0x59c67a358886 - std::io::default_write_fmt::hdea1c6df292e9097
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/io/mod.rs:639:11
[INFO] [stderr]    7:     0x59c67a358886 - std::io::Write::write_fmt::ha6a1d6c1ea64b2d0
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/io/mod.rs:1994:13
[INFO] [stderr]    8:     0x59c67a3699f9 - std::sys::backtrace::BacktraceLock::print::hcc2e1a3ac996c911
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/sys/backtrace.rs:41:9
[INFO] [stderr]    9:     0x59c67a3699f9 - std::panicking::default_hook::{{closure}}::h8e9c4d1276f0925f
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:292:27
[INFO] [stderr]   10:     0x59c67a369859 - std::panicking::default_hook::h2b2078d38b534dfb
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:319:9
[INFO] [stderr]   11:     0x59c67a2fb14e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h39d051e7dedac6a7
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/alloc/src/boxed.rs:2220:9
[INFO] [stderr]   12:     0x59c67a2fb14e - test::test_main_with_exit_callback::{{closure}}::h4b005fe75814c302
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/test/src/lib.rs:145:21
[INFO] [stderr]   13:     0x59c67a369d22 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hd426070722c13cbf
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/alloc/src/boxed.rs:2220:9
[INFO] [stderr]   14:     0x59c67a369d22 - std::panicking::panic_with_hook::h39b739724e701bfd
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:833:13
[INFO] [stderr]   15:     0x59c67a369aea - std::panicking::panic_handler::{{closure}}::he540c4833054e458
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:691:13
[INFO] [stderr]   16:     0x59c67a364c09 - std::sys::backtrace::__rust_end_short_backtrace::hfa179d89deec8aed
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/sys/backtrace.rs:176:18
[INFO] [stderr]   17:     0x59c67a34ce5d - __rustc[d131491b17107b07]::rust_begin_unwind
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:689:5
[INFO] [stderr]   18:     0x59c67a3a233d - core::panicking::panic_nounwind_fmt::runtime::hdd17ae2c2a7f85df
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/panicking.rs:122:22
[INFO] [stderr]   19:     0x59c67a3a233d - core::panicking::panic_nounwind_fmt::h2987a0c8ccb716e5
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/intrinsics/mod.rs:2449:9
[INFO] [stderr]   20:     0x59c67a234e84 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::precondition_check::h525835079e7a8dc3
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/ub_checks.rs:73:21
[INFO] [stderr]   21:     0x59c67a234e29 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::hc80f24aec77c3b65
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/ub_checks.rs:78:17
[INFO] [stderr]   22:     0x59c67a21ce58 - core::slice::<impl [T]>::get_unchecked::hb259f096a9ae6613
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/slice/mod.rs:645:26
[INFO] [stderr]   23:     0x59c67a249f7d - <crossbeam_skiplist::base::Tower<K,V> as core::ops::index::Index<usize>>::index::h480098fb2e8640de
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:39:32
[INFO] [stderr]   24:     0x59c67a24d264 - crossbeam_skiplist::base::SkipList<K,V>::search_position::h6e1f2b128338ce67
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:781:33
[INFO] [stderr]   25:     0x59c67a24c2cd - crossbeam_skiplist::base::SkipList<K,V>::insert_internal::hf5af2de6df4a6fad
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:871:31
[INFO] [stderr]   26:     0x59c67a24da14 - crossbeam_skiplist::base::SkipList<K,V>::insert::hff7cc566b841f8dd
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:1085:14
[INFO] [stderr]   27:     0x59c67a245a13 - crossbeam_skiplist::map::SkipMap<K,V>::insert::hf332afef64b4cd2c
[INFO] [stderr]                                at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/map.rs:375:31
[INFO] [stderr]   28:     0x59c67a299130 - mini_lsm::mem_table::MemTable::put::h836323707c4c992a
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table.rs:42:14
[INFO] [stderr]   29:     0x59c67a27430a - mini_lsm::mem_table::tests::test_memtable_flush::h70befe8eea6bddcf
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:35:14
[INFO] [stderr]   30:     0x59c67a2750c7 - mini_lsm::mem_table::tests::test_memtable_flush::{{closure}}::h15f4e2e7f4f2ca62
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:33:25
[INFO] [stderr]   31:     0x59c67a2a4a86 - core::ops::function::FnOnce::call_once::hca0ec8cd7103341a
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   32:     0x59c67a2faf7b - core::ops::function::FnOnce::call_once::h0217b30cfdee2e67
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   33:     0x59c67a2faf7b - test::__rust_begin_short_backtrace::h6d98714a1e28f556
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/test/src/lib.rs:663:18
[INFO] [stderr]   34:     0x59c67a30e90a - test::run_test_in_process::{{closure}}::he2c70d2634d3a3cc
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/test/src/lib.rs:686:74
[INFO] [stderr]   35:     0x59c67a30e90a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h40a0a825bcf17fdd
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   36:     0x59c67a30e90a - std::panicking::catch_unwind::do_call::h6c8eb5dd6e7b5975
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:581:40
[INFO] [stderr]   37:     0x59c67a30e90a - std::panicking::catch_unwind::h55455eac2972ad1e
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:544:19
[INFO] [stderr]   38:     0x59c67a30e90a - std::panic::catch_unwind::h0025465150a5e558
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panic.rs:359:14
[INFO] [stderr]   39:     0x59c67a30e90a - test::run_test_in_process::hb61e682f9b630fbc
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/test/src/lib.rs:686:27
[INFO] [stderr]   40:     0x59c67a30e90a - test::run_test::{{closure}}::hc2c2a7a38ab176e2
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/test/src/lib.rs:607:43
[INFO] [stderr]   41:     0x59c67a2e8ba4 - test::run_test::{{closure}}::ha91867b85cd2a911
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/test/src/lib.rs:637:41
[INFO] [stderr]   42:     0x59c67a2e8ba4 - std::sys::backtrace::__rust_begin_short_backtrace::ha00a9fe02049c339
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/sys/backtrace.rs:160:18
[INFO] [stderr]   43:     0x59c67a2ec4d2 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::hd629fba9153dfb55
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/thread/lifecycle.rs:92:13
[INFO] [stderr]   44:     0x59c67a2ec4d2 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4189018816a5c5d9
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   45:     0x59c67a2ec4d2 - std::panicking::catch_unwind::do_call::hf9fcdbca3c2e9877
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:581:40
[INFO] [stderr]   46:     0x59c67a2ec4d2 - std::panicking::catch_unwind::h97b92d88631c7c64
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panicking.rs:544:19
[INFO] [stderr]   47:     0x59c67a2ec4d2 - std::panic::catch_unwind::ha77cdbb68e725e5e
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/panic.rs:359:14
[INFO] [stderr]   48:     0x59c67a2ec4d2 - std::thread::lifecycle::spawn_unchecked::{{closure}}::h511f05bc1a132253
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/thread/lifecycle.rs:90:26
[INFO] [stderr]   49:     0x59c67a2ec4d2 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6b68b31e9b685cb8
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   50:     0x59c67a36028f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h22a27d165e4e871d
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/alloc/src/boxed.rs:2206:9
[INFO] [stderr]   51:     0x59c67a36028f - std::sys::thread::unix::Thread::new::thread_start::h45cc87bb053add0f
[INFO] [stderr]                                at /rustc/254b59607d4417e9dffbc307138ae5c86280fe4c/library/std/src/sys/thread/unix.rs:118:17
[INFO] [stderr]   52:     0x759fddda8aa4 - <unknown>
[INFO] [stderr]   53:     0x759fdde35a64 - clone
[INFO] [stderr]   54:                0x0 - <unknown>
[INFO] [stderr] thread caused non-unwinding panic. aborting.
[INFO] [stderr] error: test failed, to rerun pass `-p mini-lsm --lib`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/mini_lsm-9a2b717d7694824e` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "2faf93ccf51111caf2e642a7beadcd758890705e36106817e513ae51c11fcfcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2faf93ccf51111caf2e642a7beadcd758890705e36106817e513ae51c11fcfcd", kill_on_drop: false }`
[INFO] [stdout] 2faf93ccf51111caf2e642a7beadcd758890705e36106817e513ae51c11fcfcd
