[INFO] cloning repository https://github.com/brianshih1/mini-lsm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brianshih1/mini-lsm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianshih1%2Fmini-lsm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianshih1%2Fmini-lsm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74b040a210f2e90a0598ccca980b5345855c01ce
[INFO] testing brianshih1/mini-lsm against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianshih1%2Fmini-lsm" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/brianshih1/mini-lsm
[INFO] finished tweaking git repo https://github.com/brianshih1/mini-lsm
[INFO] tweaked toml for git repo https://github.com/brianshih1/mini-lsm written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brianshih1/mini-lsm on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brianshih1/mini-lsm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8fc2a81383fc5fcd8fce9160106fac53f84eb229c80b41bef2ef15df6b1a087
[INFO] running `Command { std: "docker" "start" "-a" "d8fc2a81383fc5fcd8fce9160106fac53f84eb229c80b41bef2ef15df6b1a087", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8fc2a81383fc5fcd8fce9160106fac53f84eb229c80b41bef2ef15df6b1a087", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8fc2a81383fc5fcd8fce9160106fac53f84eb229c80b41bef2ef15df6b1a087", kill_on_drop: false }`
[INFO] [stdout] d8fc2a81383fc5fcd8fce9160106fac53f84eb229c80b41bef2ef15df6b1a087
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d6112510770f2090b9f636bb6e7127cbc8b61e6b401e058e37bef6ae60e3252
[INFO] running `Command { std: "docker" "start" "-a" "8d6112510770f2090b9f636bb6e7127cbc8b61e6b401e058e37bef6ae60e3252", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling rustix v0.36.5
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling raw-cpuid v10.6.0
[INFO] [stderr]    Compiling crossbeam-skiplist v0.1.0
[INFO] [stderr]    Compiling linux-raw-sys v0.1.4
[INFO] [stderr]    Compiling moka v0.9.6
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling crossbeam-channel v0.5.6
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling triomphe v0.1.8
[INFO] [stderr]    Compiling tagptr v0.2.0
[INFO] [stderr]    Compiling clap_lex v0.3.0
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling uuid v1.2.2
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling quanta v0.10.1
[INFO] [stderr]    Compiling os_pipe v1.1.2
[INFO] [stderr]    Compiling scheduled-thread-pool v0.2.6
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling shared_child v1.0.0
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling arc-swap v1.5.1
[INFO] [stderr]    Compiling console v0.15.2
[INFO] [stderr]    Compiling duct v0.13.6
[INFO] [stderr]    Compiling is-terminal v0.4.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.38
[INFO] [stderr]    Compiling ouroboros_macro v0.15.5
[INFO] [stderr]    Compiling clap_derive v4.0.21
[INFO] [stderr]    Compiling 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-starter v0.1.0 (/opt/rustwide/workdir/mini-lsm-starter)
[INFO] [stdout] warning: unused import: `DerefMut`
[INFO] [stdout]  --> mini-lsm-starter/src/lsm_storage.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::{Bound, DerefMut};
[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: `Error`
[INFO] [stdout]  --> mini-lsm-starter/src/mem_table.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use anyhow::{Error, Ok, Result};
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BytesMut`
[INFO] [stdout]  --> mini-lsm-starter/src/table/builder.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use bytes::{Bytes, BytesMut};
[INFO] [stdout]   |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     block::{self, BlockBuilder},
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Block`
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     block::{Block, BlockIterator},
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Cursor`
[INFO] [stdout]  --> mini-lsm-starter/src/table.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Cursor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufMut`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 | use bytes::{Buf, BufMut, Bytes};
[INFO] [stdout]    |                  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |             self.current.as_mut().unwrap_unchecked().1.next();
[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] 88 |             let _ = self.current.as_mut().unwrap_unchecked().1.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 std::mem::replace(&mut self.current, Some(popped));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 let _ = std::mem::replace(&mut self.current, Some(popped));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |             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] 116 |             let _ = self.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:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |             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] 110 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/mem_table.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         it.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] 67 |         let _ = it.next();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mini-lsm-xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 33.98s
[INFO] running `Command { std: "docker" "inspect" "8d6112510770f2090b9f636bb6e7127cbc8b61e6b401e058e37bef6ae60e3252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d6112510770f2090b9f636bb6e7127cbc8b61e6b401e058e37bef6ae60e3252", kill_on_drop: false }`
[INFO] [stdout] 8d6112510770f2090b9f636bb6e7127cbc8b61e6b401e058e37bef6ae60e3252
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60536fb9002e39329c0f386e272b31b293249ff080a48d66f1f5ed252d7b9eb6
[INFO] running `Command { std: "docker" "start" "-a" "60536fb9002e39329c0f386e272b31b293249ff080a48d66f1f5ed252d7b9eb6", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling fastrand v1.8.0
[INFO] [stdout] warning: unused import: `DerefMut`
[INFO] [stdout]  --> mini-lsm-starter/src/lsm_storage.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::{Bound, DerefMut};
[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: `Error`
[INFO] [stdout]  --> mini-lsm-starter/src/mem_table.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use anyhow::{Error, Ok, Result};
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BytesMut`
[INFO] [stdout]  --> mini-lsm-starter/src/table/builder.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use bytes::{Bytes, BytesMut};
[INFO] [stdout]   |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     block::{self, BlockBuilder},
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Block`
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     block::{Block, BlockIterator},
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Cursor`
[INFO] [stdout]  --> mini-lsm-starter/src/table.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Cursor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufMut`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 | use bytes::{Buf, BufMut, Bytes};
[INFO] [stdout]    |                  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |             self.current.as_mut().unwrap_unchecked().1.next();
[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] 88 |             let _ = self.current.as_mut().unwrap_unchecked().1.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 std::mem::replace(&mut self.current, Some(popped));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 let _ = std::mem::replace(&mut self.current, Some(popped));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |             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] 116 |             let _ = self.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:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |             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] 110 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/mem_table.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         it.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] 67 |         let _ = it.next();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mini-lsm-xtask v0.1.0 (/opt/rustwide/workdir/xtask)
[INFO] [stderr]    Compiling tempfile v3.3.0
[INFO] [stderr]    Compiling mini-lsm-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: `DerefMut`
[INFO] [stdout]  --> mini-lsm-starter/src/lsm_storage.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::ops::{Bound, DerefMut};
[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: `Error`
[INFO] [stdout]  --> mini-lsm-starter/src/mem_table.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 | use anyhow::{Error, Ok, Result};
[INFO] [stdout]   |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BytesMut`
[INFO] [stdout]  --> mini-lsm-starter/src/table/builder.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 | use bytes::{Bytes, BytesMut};
[INFO] [stdout]   |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     block::{self, BlockBuilder},
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Block`
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     block::{Block, BlockIterator},
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Cursor`
[INFO] [stdout]  --> mini-lsm-starter/src/table.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Cursor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufMut`
[INFO] [stdout]   --> mini-lsm-starter/src/table.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 | use bytes::{Buf, BufMut, Bytes};
[INFO] [stdout]    |                  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/merge_iterator_test.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut iter = MergeIterator::create(vec![
[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/iterators/tests/two_merge_iterator_test.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let mut iter = TwoMergeIterator::create(i1, i2).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/iterators/tests/two_merge_iterator_test.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let mut iter = TwoMergeIterator::create(i1, i2).unwrap();
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `as_bytes` is never used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn as_bytes(x: &[u8]) -> Bytes {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |             self.current.as_mut().unwrap_unchecked().1.next();
[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] 88 |             let _ = self.current.as_mut().unwrap_unchecked().1.next();
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:110:17
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 std::mem::replace(&mut self.current, Some(popped));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 let _ = std::mem::replace(&mut self.current, Some(popped));
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |             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] 116 |             let _ = self.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:110:13
[INFO] [stdout]     |
[INFO] [stdout] 110 |             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] 110 |             let _ = self.next();
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> mini-lsm-starter/src/mem_table.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |         it.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] 67 |         let _ = it.next();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.85s
[INFO] running `Command { std: "docker" "inspect" "60536fb9002e39329c0f386e272b31b293249ff080a48d66f1f5ed252d7b9eb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60536fb9002e39329c0f386e272b31b293249ff080a48d66f1f5ed252d7b9eb6", kill_on_drop: false }`
[INFO] [stdout] 60536fb9002e39329c0f386e272b31b293249ff080a48d66f1f5ed252d7b9eb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ab387286b7d458ca0784543805402aa7a62ed1642220bc71c7a66ad9c266f48b
[INFO] running `Command { std: "docker" "start" "-a" "ab387286b7d458ca0784543805402aa7a62ed1642220bc71c7a66ad9c266f48b", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr] warning: unused import: `DerefMut`
[INFO] [stderr]  --> mini-lsm-starter/src/lsm_storage.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::ops::{Bound, DerefMut};
[INFO] [stderr]   |                       ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]  --> mini-lsm-starter/src/mem_table.rs:7:14
[INFO] [stderr]   |
[INFO] [stderr] 7 | use anyhow::{Error, Ok, Result};
[INFO] [stderr]   |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BytesMut`
[INFO] [stderr]  --> mini-lsm-starter/src/table/builder.rs:8:20
[INFO] [stderr]   |
[INFO] [stderr] 8 | use bytes::{Bytes, BytesMut};
[INFO] [stderr]   |                    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]   --> mini-lsm-starter/src/table/builder.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |     block::{self, BlockBuilder},
[INFO] [stderr]    |             ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Block`
[INFO] [stderr]   --> mini-lsm-starter/src/table/iterator.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |     block::{Block, BlockIterator},
[INFO] [stderr]    |             ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Cursor`
[INFO] [stderr]  --> mini-lsm-starter/src/table.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::Cursor;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BufMut`
[INFO] [stderr]   --> mini-lsm-starter/src/table.rs:13:18
[INFO] [stderr]    |
[INFO] [stderr] 13 | use bytes::{Buf, BufMut, Bytes};
[INFO] [stderr]    |                  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 |             self.current.as_mut().unwrap_unchecked().1.next();
[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] 88 |             let _ = self.current.as_mut().unwrap_unchecked().1.next();
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:110:17
[INFO] [stderr]     |
[INFO] [stderr] 110 |                 std::mem::replace(&mut self.current, Some(popped));
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 110 |                 let _ = std::mem::replace(&mut self.current, Some(popped));
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/iterators/merge_iterator.rs:116:13
[INFO] [stderr]     |
[INFO] [stderr] 116 |             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] 116 |             let _ = self.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:110:13
[INFO] [stderr]     |
[INFO] [stderr] 110 |             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] 110 |             let _ = self.next();
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> mini-lsm-starter/src/mem_table.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         it.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] 67 |         let _ = it.next();
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/merge_iterator_test.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let mut iter = MergeIterator::create(vec![
[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/iterators/tests/two_merge_iterator_test.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut iter = TwoMergeIterator::create(i1, i2).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/iterators/tests/two_merge_iterator_test.rs:91:9
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let mut iter = TwoMergeIterator::create(i1, i2).unwrap();
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function `as_bytes` is never used
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/tests/two_merge_iterator_test.rs:15:4
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn as_bytes(x: &[u8]) -> Bytes {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mini-lsm-starter` (lib) generated 12 warnings (run `cargo fix --lib -p mini-lsm-starter` to apply 7 suggestions)
[INFO] [stderr] warning: `mini-lsm-starter` (lib test) generated 16 warnings (12 duplicates) (run `cargo fix --lib -p mini-lsm-starter --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm-5e584893664a2ff0)
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test block::tests::test_block_build_full ... ok
[INFO] [stdout] test block::tests::test_block_build_single_key ... ok
[INFO] [stdout] test block::tests::test_block_encode ... ok
[INFO] [stdout] test iterators::tests::merge_iterator_test::test_merge_2 ... ok
[INFO] [stderr] 
[INFO] [stdout] test block::tests::test_block_iterator ... ok
[INFO] [stderr] thread 'mem_table::tests::test_memtable_get' (33) panicked at /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/crossbeam-skiplist-0.1.0/src/base.rs:781:33:
[INFO] [stdout] test block::tests::test_block_decode ... ok
[INFO] [stderr] unsafe precondition(s) violated: slice::get_unchecked requires that the index is within the slice
[INFO] [stdout] test iterators::tests::merge_iterator_test::test_merge_empty ... ok
[INFO] [stderr] 
[INFO] [stdout] test iterators::tests::two_merge_iterator_test::test_merge_2 ... ok
[INFO] [stderr] This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.
[INFO] [stdout] test iterators::tests::two_merge_iterator_test::test_merge_1 ... ok
[INFO] [stderr] stack backtrace:
[INFO] [stdout] test block::tests::test_block_build_all ... ok
[INFO] [stdout] test iterators::tests::merge_iterator_test::test_merge_1 ... ok
[INFO] [stdout] test block::tests::test_block_seek_key ... ok
[INFO] [stderr]    0:     0x56b9a396c9f2 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stderr]    1:     0x56b9a396c9f2 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stderr]    2:     0x56b9a396c9f2 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stderr]    3:     0x56b9a396c9f2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stderr]    4:     0x56b9a397cf8a - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stderr]    5:     0x56b9a397cf8a - core::fmt::write::h952c506e2dbe9cff
[INFO] [stderr]    6:     0x56b9a393a696 - std::io::default_write_fmt::h72db0b4dbd5dcfa2
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stderr]    7:     0x56b9a393a696 - std::io::Write::write_fmt::hb496f2b9b027aa16
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stderr]    8:     0x56b9a394b999 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stderr]    9:     0x56b9a394b999 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stderr]   10:     0x56b9a394b7f9 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:319:9
[INFO] [stderr]   11:     0x56b9a38db54e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stderr]   12:     0x56b9a38db54e - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stderr]   13:     0x56b9a394bcc2 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stderr]   14:     0x56b9a394bcc2 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stderr]   15:     0x56b9a394ba8a - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:691:13
[INFO] [stderr]   16:     0x56b9a3946b59 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stderr]   17:     0x56b9a392e8ad - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stderr]   18:     0x56b9a39842cd - core::panicking::panic_nounwind_fmt::runtime::hdd333623f60f3530
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:122:22
[INFO] [stderr]   19:     0x56b9a39842cd - core::panicking::panic_nounwind_fmt::ha2bdc0d440fd6df8
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/intrinsics/mod.rs:2432:9
[INFO] [stderr]   20:     0x56b9a3836b24 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::precondition_check::h547e499f13ab4b63
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ub_checks.rs:73:21
[INFO] [stderr]   21:     0x56b9a38369d9 - <usize as core::slice::index::SliceIndex<[T]>>::get_unchecked::ha04811bf0915c778
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ub_checks.rs:78:17
[INFO] [stderr]   22:     0x56b9a3834828 - core::slice::<impl [T]>::get_unchecked::h5066914563771463
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/slice/mod.rs:646:26
[INFO] [stderr]   23:     0x56b9a3854ddd - <crossbeam_skiplist::base::Tower<K,V> as core::ops::index::Index<usize>>::index::h7c770ffaac627187
[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:     0x56b9a3858784 - crossbeam_skiplist::base::SkipList<K,V>::search_position::he7d9a4af7306c13a
[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:     0x56b9a38577ed - crossbeam_skiplist::base::SkipList<K,V>::insert_internal::hc73c703d1ef63ba9
[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:     0x56b9a3858f34 - crossbeam_skiplist::base::SkipList<K,V>::insert::h411f3baf8bfa9e37
[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:     0x56b9a38645f3 - crossbeam_skiplist::map::SkipMap<K,V>::insert::h21b4a5b184f2d95f
[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:     0x56b9a388f5a0 - mini_lsm::mem_table::MemTable::put::ha07b25f8417cf25d
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table.rs:42:14
[INFO] [stderr]   29:     0x56b9a3837584 - mini_lsm::mem_table::tests::test_memtable_get::hdfa9ab6a2da95eea
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:10:14
[INFO] [stderr]   30:     0x56b9a3837b07 - mini_lsm::mem_table::tests::test_memtable_get::{{closure}}::h784bb42540614813
[INFO] [stderr]                                at /opt/rustwide/workdir/mini-lsm/src/mem_table/tests.rs:8:23
[INFO] [stderr]   31:     0x56b9a387f366 - core::ops::function::FnOnce::call_once::h8005236f98f3ec8b
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   32:     0x56b9a38db34b - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   33:     0x56b9a38db34b - test::__rust_begin_short_backtrace::he30322a73a0e9ea6
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18
[INFO] [stderr]   34:     0x56b9a38eed1a - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74
[INFO] [stderr]   35:     0x56b9a38eed1a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   36:     0x56b9a38eed1a - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stderr]   37:     0x56b9a38eed1a - std::panicking::catch_unwind::h54b1de7ceab578bf
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stderr]   38:     0x56b9a38eed1a - std::panic::catch_unwind::h60c29b7a9d0246b1
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stderr]   39:     0x56b9a38eed1a - test::run_test_in_process::h6099b5f871379b13
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27
[INFO] [stderr]   40:     0x56b9a38eed1a - test::run_test::{{closure}}::h926ce0a38281a4c8
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43
[INFO] [stderr]   41:     0x56b9a38c9174 - test::run_test::{{closure}}::h508de21a9afc7140
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41
[INFO] [stderr]   42:     0x56b9a38c9174 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stderr]   43:     0x56b9a38cca32 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stderr]   44:     0x56b9a38cca32 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stderr]   45:     0x56b9a38cca32 - std::panicking::catch_unwind::do_call::h0bba3937b4892238
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stderr]   46:     0x56b9a38cca32 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stderr]   47:     0x56b9a38cca32 - std::panic::catch_unwind::hb2fa05d52ed0124e
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stderr]   48:     0x56b9a38cca32 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stderr]   49:     0x56b9a38cca32 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stderr]   50:     0x56b9a3941d3f - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stderr]   51:     0x56b9a3941d3f - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stderr]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stderr]   52:     0x78c5ff596aa4 - <unknown>
[INFO] [stderr]   53:     0x78c5ff623a64 - 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-5e584893664a2ff0` (signal: 6, SIGABRT: process abort signal)
[INFO] [stdout] test iterators::tests::two_merge_iterator_test::test_merge_4 ... 
[INFO] running `Command { std: "docker" "inspect" "ab387286b7d458ca0784543805402aa7a62ed1642220bc71c7a66ad9c266f48b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab387286b7d458ca0784543805402aa7a62ed1642220bc71c7a66ad9c266f48b", kill_on_drop: false }`
[INFO] [stdout] ab387286b7d458ca0784543805402aa7a62ed1642220bc71c7a66ad9c266f48b
