[INFO] cloning repository https://github.com/nikhilknit/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/nikhilknit/Mini-LSM" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilknit%2FMini-LSM", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilknit%2FMini-LSM'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac119f66af48511b94b95f5b3dde4f902c6d692d
[INFO] testing nikhilknit/Mini-LSM against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilknit%2FMini-LSM" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/nikhilknit/Mini-LSM
[INFO] finished tweaking git repo https://github.com/nikhilknit/Mini-LSM
[INFO] tweaked toml for git repo https://github.com/nikhilknit/Mini-LSM written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/nikhilknit/Mini-LSM on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/nikhilknit/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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 657c23182389ed563b4124f70e9af9b972e7e7616460836f0029e19b08629629
[INFO] running `Command { std: "docker" "start" "-a" "657c23182389ed563b4124f70e9af9b972e7e7616460836f0029e19b08629629", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "657c23182389ed563b4124f70e9af9b972e7e7616460836f0029e19b08629629", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "657c23182389ed563b4124f70e9af9b972e7e7616460836f0029e19b08629629", kill_on_drop: false }`
[INFO] [stdout] 657c23182389ed563b4124f70e9af9b972e7e7616460836f0029e19b08629629
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60d0c5e4dbd73ede7b8a03e67cd32fc23df9940f14ef47a21adb499954d9a372
[INFO] running `Command { std: "docker" "start" "-a" "60d0c5e4dbd73ede7b8a03e67cd32fc23df9940f14ef47a21adb499954d9a372", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling is_terminal_polyfill v1.70.0
[INFO] [stderr]    Compiling anstyle v1.0.7
[INFO] [stderr]    Compiling colorchoice v1.0.1
[INFO] [stderr]    Compiling bitflags v2.5.0
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]    Compiling anstyle-parse v0.2.4
[INFO] [stderr]    Compiling anstyle-query v1.1.0
[INFO] [stderr]    Compiling rustix v0.38.34
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]    Compiling anyhow v1.0.86
[INFO] [stderr]    Compiling clap_lex v0.7.1
[INFO] [stderr]    Compiling syn v2.0.67
[INFO] [stderr]    Compiling either v1.12.0
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling raw-cpuid v10.7.0
[INFO] [stderr]    Compiling nibble_vec v0.1.0
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling moka v0.9.9
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]    Compiling radix_trie v0.2.1
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling anstream v0.6.14
[INFO] [stderr]    Compiling itertools v0.12.1
[INFO] [stderr]    Compiling triomphe v0.1.13
[INFO] [stderr]    Compiling tagptr v0.2.0
[INFO] [stderr]    Compiling farmhash v1.1.5
[INFO] [stderr]    Compiling clap_builder v4.5.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-channel v0.5.13
[INFO] [stderr]    Compiling crossbeam-skiplist v0.1.3
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling nix v0.27.1
[INFO] [stderr]    Compiling quanta v0.11.1
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling os_pipe v1.2.0
[INFO] [stderr]    Compiling shared_child v1.0.0
[INFO] [stderr]    Compiling console v0.15.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling uuid v1.8.0
[INFO] [stderr]    Compiling duct v0.13.7
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling scheduled-thread-pool v0.2.7
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling fd-lock v4.0.2
[INFO] [stderr]    Compiling rustyline v13.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.61
[INFO] [stderr]    Compiling clap_derive v4.5.5
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]    Compiling ouroboros_macro v0.18.4
[INFO] [stderr]    Compiling thiserror v1.0.61
[INFO] [stderr]    Compiling ouroboros v0.18.4
[INFO] [stderr]    Compiling clap v4.5.7
[INFO] [stderr]    Compiling mini-lsm-xtask v0.2.0 (/opt/rustwide/workdir/xtask)
[INFO] [stderr]    Compiling mini-lsm-mvcc v0.2.0 (/opt/rustwide/workdir/mini-lsm-mvcc)
[INFO] [stderr]    Compiling mini-lsm-starter v0.2.0 (/opt/rustwide/workdir/mini-lsm-starter)
[INFO] [stderr]    Compiling mini-lsm v0.2.0 (/opt/rustwide/workdir/mini-lsm)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 332 | /         loop {
[INFO] [stdout] 333 | |             // --- QUICK CHECK: read the current memtable and its size without global mutex ---
[INFO] [stdout] 334 | |             {
[INFO] [stdout] 335 | |                 let state_read = self.state.read(); // RwLock read guard for Arc<LsmStorageState>
[INFO] [stdout] ...   |
[INFO] [stdout] 370 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 371 |
[INFO] [stdout] 372 |           Ok(())
[INFO] [stdout]     |           ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         mut self,
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/block/iterator.rs:60:16
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/concat_iterator.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/key.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/key.rs:94:25
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:377:9
[INFO] [stdout]     |
[INFO] [stdout] 377 |         self.put(_key, TOMBSTONE);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 377 |         let _ = self.put(_key, TOMBSTONE);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:196:12
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/block/iterator.rs:77:16
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/iterators/concat_iterator.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/iterators/merge_iterator.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/key.rs:89:25
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/key.rs:119:25
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]     |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/mem_table.rs:260:12
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/table/iterator.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/block/iterator.rs:76:16
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm/src/iterators/concat_iterator.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/iterators/merge_iterator.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/key.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/key.rs:94:25
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm/src/mem_table.rs:206:12
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/table/iterator.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3m 03s
[INFO] running `Command { std: "docker" "inspect" "60d0c5e4dbd73ede7b8a03e67cd32fc23df9940f14ef47a21adb499954d9a372", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60d0c5e4dbd73ede7b8a03e67cd32fc23df9940f14ef47a21adb499954d9a372", kill_on_drop: false }`
[INFO] [stdout] 60d0c5e4dbd73ede7b8a03e67cd32fc23df9940f14ef47a21adb499954d9a372
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab5cfaf9c0bf04ce09ae760443e6a1382e9a9945f1d4207bc6bd956102978b1c
[INFO] running `Command { std: "docker" "start" "-a" "ab5cfaf9c0bf04ce09ae760443e6a1382e9a9945f1d4207bc6bd956102978b1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling fastrand v2.1.0
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/block/iterator.rs:77:16
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/iterators/concat_iterator.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/iterators/merge_iterator.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/key.rs:89:25
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/key.rs:119:25
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]     |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/mem_table.rs:260:12
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/table/iterator.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 332 | /         loop {
[INFO] [stdout] 333 | |             // --- QUICK CHECK: read the current memtable and its size without global mutex ---
[INFO] [stdout] 334 | |             {
[INFO] [stdout] 335 | |                 let state_read = self.state.read(); // RwLock read guard for Arc<LsmStorageState>
[INFO] [stdout] ...   |
[INFO] [stdout] 370 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 371 |
[INFO] [stdout] 372 |           Ok(())
[INFO] [stdout]     |           ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         mut self,
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/block/iterator.rs:60:16
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/concat_iterator.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mini-lsm-xtask v0.2.0 (/opt/rustwide/workdir/xtask)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/key.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/key.rs:94:25
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:377:9
[INFO] [stdout]     |
[INFO] [stdout] 377 |         self.put(_key, TOMBSTONE);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 377 |         let _ = self.put(_key, TOMBSTONE);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:196:12
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/block/iterator.rs:76:16
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm/src/iterators/concat_iterator.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/iterators/merge_iterator.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/key.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/key.rs:94:25
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm/src/mem_table.rs:206:12
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/table/iterator.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tempfile v3.10.1
[INFO] [stderr]    Compiling mini-lsm-starter v0.2.0 (/opt/rustwide/workdir/mini-lsm-starter)
[INFO] [stderr]    Compiling mini-lsm-mvcc v0.2.0 (/opt/rustwide/workdir/mini-lsm-mvcc)
[INFO] [stderr]    Compiling mini-lsm v0.2.0 (/opt/rustwide/workdir/mini-lsm)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:372:9
[INFO] [stdout]     |
[INFO] [stdout] 332 | /         loop {
[INFO] [stdout] 333 | |             // --- QUICK CHECK: read the current memtable and its size without global mutex ---
[INFO] [stdout] 334 | |             {
[INFO] [stdout] 335 | |                 let state_read = self.state.read(); // RwLock read guard for Arc<LsmStorageState>
[INFO] [stdout] ...   |
[INFO] [stdout] 370 | |         }
[INFO] [stdout]     | |_________- any code following this expression is unreachable
[INFO] [stdout] 371 |
[INFO] [stdout] 372 |           Ok(())
[INFO] [stdout]     |           ^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> mini-lsm-starter/src/table/builder.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         mut self,
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/block/iterator.rs:60:16
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/concat_iterator.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/key.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/key.rs:94:25
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> mini-lsm-starter/src/lsm_storage.rs:377:9
[INFO] [stdout]     |
[INFO] [stdout] 377 |         self.put(_key, TOMBSTONE);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 377 |         let _ = self.put(_key, TOMBSTONE);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-starter/src/mem_table.rs:196:12
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 196 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/table/iterator.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 60 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-starter/src/tests/harness.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/block/iterator.rs:76:16
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm/src/iterators/concat_iterator.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/iterators/merge_iterator.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/key.rs:71:25
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/key.rs:94:25
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm/src/mem_table.rs:206:12
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 206 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/table/iterator.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm/src/tests/harness.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/block/iterator.rs:77:16
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn key(&self) -> KeySlice {
[INFO] [stdout]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/iterators/concat_iterator.rs:111:12
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/iterators/merge_iterator.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/key.rs:89:25
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/key.rs:119:25
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stdout]     |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> mini-lsm-mvcc/src/mem_table.rs:260:12
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn key(&self) -> KeySlice {
[INFO] [stdout]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 260 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]     |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/table/iterator.rs:99:12
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> mini-lsm-mvcc/src/tests/harness.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn key(&self) -> KeySlice {
[INFO] [stdout]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |            |
[INFO] [stdout]    |            this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stdout]    |                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 59.88s
[INFO] running `Command { std: "docker" "inspect" "ab5cfaf9c0bf04ce09ae760443e6a1382e9a9945f1d4207bc6bd956102978b1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab5cfaf9c0bf04ce09ae760443e6a1382e9a9945f1d4207bc6bd956102978b1c", kill_on_drop: false }`
[INFO] [stdout] ab5cfaf9c0bf04ce09ae760443e6a1382e9a9945f1d4207bc6bd956102978b1c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 166e1e6b053995bd3102b239d759fb2fe715f0666ef9431f8d7faa2b83518912
[INFO] running `Command { std: "docker" "start" "-a" "166e1e6b053995bd3102b239d759fb2fe715f0666ef9431f8d7faa2b83518912", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:372:9
[INFO] [stderr]     |
[INFO] [stderr] 332 | /         loop {
[INFO] [stderr] 333 | |             // --- QUICK CHECK: read the current memtable and its size without global mutex ---
[INFO] [stderr] 334 | |             {
[INFO] [stderr] 335 | |                 let state_read = self.state.read(); // RwLock read guard for Arc<LsmStorageState>
[INFO] [stderr] ...   |
[INFO] [stderr] 370 | |         }
[INFO] [stderr]     | |_________- any code following this expression is unreachable
[INFO] [stderr] 371 |
[INFO] [stderr] 372 |           Ok(())
[INFO] [stderr]     |           ^^^^^^ unreachable expression
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> mini-lsm-starter/src/table/builder.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |         mut self,
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-starter/src/block/iterator.rs:60:16
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn key(&self) -> KeySlice {
[INFO] [stderr]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                |
[INFO] [stderr]    |                this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                  ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/concat_iterator.rs:49:12
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-starter/src/iterators/merge_iterator.rs:71:12
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 71 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-starter/src/key.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stderr]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-starter/src/key.rs:94:25
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stderr]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> mini-lsm-starter/src/lsm_storage.rs:377:9
[INFO] [stderr]     |
[INFO] [stderr] 377 |         self.put(_key, TOMBSTONE);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 377 |         let _ = self.put(_key, TOMBSTONE);
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> mini-lsm-starter/src/mem_table.rs:196:12
[INFO] [stderr]     |
[INFO] [stderr] 196 |     fn key(&self) -> KeySlice {
[INFO] [stderr]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]     |            |
[INFO] [stderr]     |            this lifetime flows to the output
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 196 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]     |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-starter/src/table/iterator.rs:60:12
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 60 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm/src/block/iterator.rs:76:16
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn key(&self) -> KeySlice {
[INFO] [stderr]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                |
[INFO] [stderr]    |                this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 76 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                  ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> mini-lsm/src/iterators/concat_iterator.rs:111:12
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn key(&self) -> KeySlice {
[INFO] [stderr]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]     |            |
[INFO] [stderr]     |            this lifetime flows to the output
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]     |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm/src/iterators/merge_iterator.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm/src/key.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stderr]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm/src/key.rs:94:25
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stderr]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> mini-lsm/src/mem_table.rs:206:12
[INFO] [stderr]     |
[INFO] [stderr] 206 |     fn key(&self) -> KeySlice {
[INFO] [stderr]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]     |            |
[INFO] [stderr]     |            this lifetime flows to the output
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 206 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]     |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm/src/table/iterator.rs:99:12
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-mvcc/src/block/iterator.rs:77:16
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn key(&self) -> KeySlice {
[INFO] [stderr]    |                ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                |
[INFO] [stderr]    |                this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                  ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> mini-lsm-mvcc/src/iterators/concat_iterator.rs:111:12
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn key(&self) -> KeySlice {
[INFO] [stderr]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]     |            |
[INFO] [stderr]     |            this lifetime flows to the output
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 111 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]     |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-mvcc/src/iterators/merge_iterator.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-mvcc/src/key.rs:89:25
[INFO] [stderr]    |
[INFO] [stderr] 89 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stderr]    |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 89 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> mini-lsm-mvcc/src/key.rs:119:25
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub fn as_key_slice(&self) -> KeySlice {
[INFO] [stderr]     |                         ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         this lifetime flows to the output
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub fn as_key_slice(&self) -> KeySlice<'_> {
[INFO] [stderr]     |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> mini-lsm-mvcc/src/mem_table.rs:260:12
[INFO] [stderr]     |
[INFO] [stderr] 260 |     fn key(&self) -> KeySlice {
[INFO] [stderr]     |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]     |            |
[INFO] [stderr]     |            this lifetime flows to the output
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 260 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]     |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-mvcc/src/table/iterator.rs:99:12
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 99 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-mvcc/src/tests/harness.rs:76:12
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm-starter/src/tests/harness.rs:76:12
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> mini-lsm/src/tests/harness.rs:76:12
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn key(&self) -> KeySlice {
[INFO] [stderr]    |            ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |            |
[INFO] [stderr]    |            this lifetime flows to the output
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn key(&self) -> KeySlice<'_> {
[INFO] [stderr]    |                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `mini-lsm-starter` (lib) generated 10 warnings (run `cargo fix --lib -p mini-lsm-starter` to apply 1 suggestion)
[INFO] [stderr] warning: `mini-lsm` (lib) generated 7 warnings
[INFO] [stderr] warning: `mini-lsm-mvcc` (lib) generated 7 warnings
[INFO] [stderr] warning: `mini-lsm-mvcc` (lib test) generated 8 warnings (7 duplicates)
[INFO] [stderr] warning: `mini-lsm-starter` (lib test) generated 11 warnings (10 duplicates)
[INFO] [stderr] warning: `mini-lsm` (lib test) generated 8 warnings (7 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm-36f5a712d00c52b2)
[INFO] [stdout] 
[INFO] [stdout] running 56 tests
[INFO] [stdout] test tests::week1_day2::test_task1_empty_memtable_iter ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_1 ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_2 ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_empty ... ok
[INFO] [stdout] test tests::week1_day2::test_task1_memtable_iter ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_error ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_full ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_single_key ... ok
[INFO] [stdout] test tests::week1_day3::test_block_decode ... ok
[INFO] [stdout] test tests::week1_day3::test_block_iterator ... ok
[INFO] [stdout] test tests::week1_day1::test_task1_memtable_overwrite ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_large_1 ... ok
[INFO] [stdout] test tests::week1_day3::test_block_seek_key ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_all ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_build_single_key ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_build_all ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_build_two_blocks ... ok
[INFO] [stdout] test tests::week1_day3::test_block_encode ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_3 ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_4 ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_5 ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_2 ... ok
[INFO] [stdout] test tests::week1_day1::test_task2_storage_integration ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_seek_key ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_decode ... ok
[INFO] [stdout] test tests::week1_day7::test_task1_bloom_filter ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_iterator ... ok
[INFO] [stdout] test tests::week1_day7::test_task2_sst_decode ... ok
[INFO] [stdout] test tests::week1_day7::test_task3_block_key_compression ... ok
[INFO] [stdout] test tests::week1_day2::test_task3_fused_iterator ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_1 ... ok
[INFO] [stdout] test tests::week1_day2::test_task4_integration ... ok
[INFO] [stdout] test tests::week1_day1::test_task3_storage_integration ... ok
[INFO] [stdout] test tests::week1_day1::test_task4_storage_integration ... ok
[INFO] [stdout] test tests::week1_day5::test_task2_storage_scan ... ok
[INFO] [stdout] test tests::week1_day1::test_task1_memtable_get ... ok
[INFO] [stdout] test tests::week1_day5::test_task3_storage_get ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_large_2 ... ok
[INFO] [stdout] test tests::week1_day1::test_task3_freeze_on_capacity ... ok
[INFO] [stdout] test tests::week1_day6::test_task1_storage_scan ... ok
[INFO] [stdout] test tests::week2_day1::test_task2_concat_iterator ... ok
[INFO] [stdout] test tests::week2_day1::test_task3_integration ... ok
[INFO] [stdout] test tests::week1_day6::test_task1_storage_get ... ok
[INFO] [stdout] test tests::week2_day1::test_task1_full_compaction ... ok
[INFO] [stdout] test tests::week1_day6::test_task3_sst_filter ... ok
[INFO] [stdout] test tests::week2_day6::test_integration_tiered ... ok
[INFO] [stdout] test tests::week2_day5::test_integration_leveled ... ok
[INFO] [stdout] test tests::week2_day5::test_integration_simple ... ok
[INFO] [stdout] test tests::week2_day5::test_integration_tiered ... ok
[INFO] [stdout] test tests::week2_day6::test_integration_simple ... ok
[INFO] [stdout] test tests::week2_day6::test_integration_leveled ... ok
[INFO] [stdout] test tests::week1_day6::test_task2_auto_flush ... ok
[INFO] [stdout] test tests::week2_day5::test_multiple_compacted_ssts_leveled ... ok
[INFO] [stdout] test tests::week2_day4::test_integration ... ok
[INFO] [stdout] test tests::week2_day3::test_integration ... ok
[INFO] [stdout] test tests::week2_day2::test_integration ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 56 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 5.86s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/compaction-simulator.rs (/opt/rustwide/target/debug/deps/compaction_simulator_ref-68e5cb0b003d98e8)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/mini-lsm-cli.rs (/opt/rustwide/target/debug/deps/mini_lsm_cli_ref-d7419610371c7f4e)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/wrapper.rs (/opt/rustwide/target/debug/deps/mini_lsm_wrapper_ref-ac670ef0b5ab36c6)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm_mvcc-4010e4caf4f87a11)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 72 tests
[INFO] [stdout] test tests::week1_day1::test_task1_memtable_get ... ok
[INFO] [stdout] test tests::week1_day1::test_task1_memtable_overwrite ... ok
[INFO] [stdout] test tests::week1_day2::test_task1_memtable_iter ... ok
[INFO] [stdout] test tests::week1_day2::test_task1_empty_memtable_iter ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_empty ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_error ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_1 ... ok
[INFO] [stdout] test tests::week1_day2::test_task2_merge_2 ... ok
[INFO] [stdout] test tests::week1_day2::test_task3_fused_iterator ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_all ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_large_1 ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_large_2 ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_single_key ... ok
[INFO] [stdout] test tests::week1_day3::test_block_decode ... ok
[INFO] [stdout] test tests::week1_day3::test_block_encode ... ok
[INFO] [stdout] test tests::week1_day3::test_block_iterator ... ok
[INFO] [stdout] test tests::week1_day3::test_block_seek_key ... ok
[INFO] [stdout] test tests::week1_day3::test_block_build_full ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_5 ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_1 ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_2 ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_4 ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_build_all ... ok
[INFO] [stdout] test tests::week1_day5::test_task1_merge_3 ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_build_single_key ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_iterator ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_build_two_blocks ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_decode ... ok
[INFO] [stdout] test tests::week1_day4::test_sst_seek_key ... ok
[INFO] [stdout] test tests::week1_day7::test_task1_bloom_filter ... ok
[INFO] [stdout] test tests::week1_day1::test_task2_storage_integration ... ok
[INFO] [stdout] test tests::week1_day7::test_task2_sst_decode ... ok
[INFO] [stdout] test tests::week1_day7::test_task3_block_key_compression ... ok
[INFO] [stdout] test tests::week1_day1::test_task3_storage_integration ... ok
[INFO] [stdout] test tests::week1_day2::test_task4_integration ... ok
[INFO] [stdout] test tests::week1_day1::test_task4_storage_integration ... ok
[INFO] [stdout] test tests::week1_day6::test_task1_storage_get ... ok
[INFO] [stdout] test tests::week1_day5::test_task2_storage_scan ... ok
[INFO] [stdout] test tests::week1_day6::test_task1_storage_scan ... ok
[INFO] [stdout] test tests::week1_day1::test_task3_freeze_on_capacity ... ok
[INFO] [stdout] test tests::week1_day5::test_task3_storage_get ... ok
[INFO] [stdout] test tests::week3_day1::test_sst_build_multi_version_hard ... ok
[INFO] [stdout] test tests::week2_day1::test_task2_concat_iterator ... ok
[INFO] [stdout] test tests::week3_day1::test_sst_build_multi_version_simple ... ok
[INFO] [stdout] test tests::week1_day6::test_task3_sst_filter ... ok
[INFO] [stdout] test tests::week3_day3::test_task2_memtable_mvcc ... ok
[INFO] [stdout] test tests::week3_day3::test_task3_sst_ts ... ok
[INFO] [stdout] test tests::week3_day4::test_task1_watermark ... ok
[INFO] [stdout] test tests::week3_day4::test_task2_snapshot_watermark ... ok
[INFO] [stdout] test tests::week2_day1::test_task3_integration ... ok
[INFO] [stdout] test tests::week3_day3::test_task2_lsm_iterator_mvcc ... ok
[INFO] [stdout] test tests::week3_day5::test_txn_integration ... ok
[INFO] [stdout] test tests::week3_day6::test_serializable_1 ... ok
[INFO] [stdout] test tests::week3_day6::test_serializable_2 ... ok
[INFO] [stdout] test tests::week2_day1::test_task1_full_compaction ... ok
[INFO] [stdout] test tests::week3_day6::test_serializable_4_scan ... ok
[INFO] [stdout] test tests::week3_day6::test_serializable_3_ts_range ... ok
[INFO] [stdout] test tests::week3_day6::test_serializable_5_read_only ... ok
[INFO] [stdout] test tests::week3_day4::test_task3_mvcc_compaction ... ok
[INFO] [stdout] test tests::week3_day7::test_task3_mvcc_compaction ... ok
[INFO] [stdout] test tests::week2_day6::test_integration_leveled ... ok
[INFO] [stdout] test tests::week2_day5::test_integration_leveled ... ok
[INFO] [stdout] test tests::week2_day5::test_integration_tiered ... ok
[INFO] [stdout] test tests::week2_day6::test_integration_tiered ... ok
[INFO] [stdout] test tests::week2_day6::test_integration_simple ... ok
[INFO] [stdout] test tests::week2_day5::test_integration_simple ... ok
[INFO] [stdout] test tests::week1_day6::test_task2_auto_flush ... ok
[INFO] [stdout] test tests::week2_day5::test_multiple_compacted_ssts_leveled ... ok
[INFO] [stdout] test tests::week2_day2::test_integration ... ok
[INFO] [stdout] test tests::week2_day4::test_integration ... ok
[INFO] [stdout] test tests::week2_day3::test_integration ... ok
[INFO] [stdout] test tests::week3_day2::test_task3_compaction_integration ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 72 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 5.77s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/compaction-simulator.rs (/opt/rustwide/target/debug/deps/compaction_simulator_mvcc_ref-b031921efd48283e)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/mini-lsm-cli.rs (/opt/rustwide/target/debug/deps/mini_lsm_cli_mvcc_ref-3ca7312ee28056c3)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/wrapper.rs (/opt/rustwide/target/debug/deps/mini_lsm_wrapper_mvcc_ref-7feb608afaa14b7b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mini_lsm_starter-67ad69acc31fbb6a)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::week1_day1::test_task1_memtable_get ... ok
[INFO] [stdout] test tests::week1_day1::test_task1_memtable_overwrite ... ok
[INFO] [stdout] test tests::week1_day1::test_task3_freeze_on_capacity ... ok
[INFO] [stdout] test tests::week1_day1::test_task2_storage_integration ... ok
[INFO] [stdout] test tests::week1_day1::test_task3_storage_integration ... FAILED
[INFO] [stdout] test tests::week1_day1::test_task4_storage_integration ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- tests::week1_day1::test_task3_storage_integration stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::week1_day1::test_task3_storage_integration' panicked at mini-lsm-starter/src/tests/week1_day1.rs:111:5:
[INFO] [stdout] wrong order of memtables?
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5976cd7da5d2 - std::backtrace_rs::backtrace::libunwind::trace::h73a647620bf1c49d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5976cd7da5d2 - std::backtrace_rs::backtrace::trace_unsynchronized::hd4d513ed96cb3cb1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5976cd7da5d2 - std::sys::backtrace::_print_fmt::h61bb95f7476aafa5
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5976cd7da5d2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha2e7e3a01df69042
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5976cd800233 - core::fmt::rt::Argument::fmt::hf14163372f0f9a76
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5976cd800233 - core::fmt::write::h7cb8f63788cd01d2
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/mod.rs:1465:25
[INFO] [stdout]    6:     0x5976cd7d7133 - std::io::default_write_fmt::h9ed739ccee8a150c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5976cd7d7133 - std::io::Write::write_fmt::h1c0a32da913b32f1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5976cd7da422 - std::sys::backtrace::BacktraceLock::print::h3ec4d7883eb25e61
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5976cd7dbbec - std::panicking::default_hook::{{closure}}::h29548987efd832cb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5976cd7dba42 - std::panicking::default_hook::ha25170a15c643514
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5976cd7987f4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h562adeecbf43c420
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5976cd7987f4 - test::test_main_with_exit_callback::{{closure}}::h97dd2a879d27e0e4
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5976cd7dc6cb - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7e85cbdbda26fdb7
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5976cd7dc6cb - std::panicking::rust_panic_with_hook::h0d81afcd829aa24b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5976cd7dc366 - std::panicking::begin_panic_handler::{{closure}}::hc84a33f1202346cf
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:699:13
[INFO] [stdout]   16:     0x5976cd7daac9 - std::sys::backtrace::__rust_end_short_backtrace::h373067a14f6c59aa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x5976cd7dc02d - __rustc[beb0385846a06d21]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5976cd7fed80 - core::panicking::panic_fmt::ha33fa2ae772efba9
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5976cd74bf3b - mini_lsm_starter::tests::week1_day1::test_task3_storage_integration::h73b92d10d6c7f8b9
[INFO] [stdout]                                at /opt/rustwide/workdir/mini-lsm-starter/src/tests/week1_day1.rs:111:5
[INFO] [stdout]   20:     0x5976cd74bf3b - mini_lsm_starter::tests::week1_day1::test_task3_storage_integration::{{closure}}::h86a89ce5e774920c
[INFO] [stdout]                                at /opt/rustwide/workdir/mini-lsm-starter/src/tests/week1_day1.rs:90:36
[INFO] [stdout]   21:     0x5976cd74bf3b - core::ops::function::FnOnce::call_once::h33f6dc8608928d88
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x5976cd79df2b - core::ops::function::FnOnce::call_once::hf84b9c3d864a6959
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x5976cd79df2b - test::__rust_begin_short_backtrace::h5724e31441c16fcb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:648:18
[INFO] [stdout]   24:     0x5976cd79d16e - test::run_test_in_process::{{closure}}::hbc28c9aa91793d7d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:74
[INFO] [stdout]   25:     0x5976cd79d16e - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc17b0e238c0f8f3e
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x5976cd79d16e - std::panicking::catch_unwind::do_call::hcdbce0d6dd6c83ce
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   27:     0x5976cd79d16e - std::panicking::catch_unwind::h9477967ceea044e8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   28:     0x5976cd79d16e - std::panic::catch_unwind::h616a2e249da12e16
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   29:     0x5976cd79d16e - test::run_test_in_process::h2758deb0f2e54430
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:27
[INFO] [stdout]   30:     0x5976cd79d16e - test::run_test::{{closure}}::habe5cd2564b18aaa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:592:43
[INFO] [stdout]   31:     0x5976cd760d14 - test::run_test::{{closure}}::h9a0a6928f1a15421
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:622:41
[INFO] [stdout]   32:     0x5976cd760d14 - std::sys::backtrace::__rust_begin_short_backtrace::hd68b5332434a22ca
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   33:     0x5976cd7646ba - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h264ddcc3098eacae
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   34:     0x5976cd7646ba - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9fa39489749d6f3c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x5976cd7646ba - std::panicking::catch_unwind::do_call::hb9a1944b9f85100f
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   36:     0x5976cd7646ba - std::panicking::catch_unwind::h0c6f100786c0dad8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   37:     0x5976cd7646ba - std::panic::catch_unwind::hf6084e2723385823
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   38:     0x5976cd7646ba - std::thread::Builder::spawn_unchecked_::{{closure}}::hf0af58ce658143ad
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   39:     0x5976cd7646ba - core::ops::function::FnOnce::call_once{{vtable.shim}}::h88a14f9b2e79f9de
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x5976cd7df907 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf31256ba38644b65
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   41:     0x5976cd7df907 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h100ad77f3448041b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   42:     0x5976cd7df907 - std::sys::pal::unix::thread::Thread::new::thread_start::h1a22ded422ce395b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   43:     0x7c5fcbe63aa4 - <unknown>
[INFO] [stdout]   44:     0x7c5fcbef0a34 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- tests::week1_day1::test_task4_storage_integration stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'tests::week1_day1::test_task4_storage_integration' panicked at mini-lsm-starter/src/tests/week1_day1.rs:165:44:
[INFO] [stdout] called `Option::unwrap()` on a `None` value
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5976cd7da5d2 - std::backtrace_rs::backtrace::libunwind::trace::h73a647620bf1c49d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5976cd7da5d2 - std::backtrace_rs::backtrace::trace_unsynchronized::hd4d513ed96cb3cb1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5976cd7da5d2 - std::sys::backtrace::_print_fmt::h61bb95f7476aafa5
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x5976cd7da5d2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha2e7e3a01df69042
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x5976cd800233 - core::fmt::rt::Argument::fmt::hf14163372f0f9a76
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x5976cd800233 - core::fmt::write::h7cb8f63788cd01d2
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/mod.rs:1465:25
[INFO] [stdout]    6:     0x5976cd7d7133 - std::io::default_write_fmt::h9ed739ccee8a150c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5976cd7d7133 - std::io::Write::write_fmt::h1c0a32da913b32f1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x5976cd7da422 - std::sys::backtrace::BacktraceLock::print::h3ec4d7883eb25e61
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x5976cd7dbbec - std::panicking::default_hook::{{closure}}::h29548987efd832cb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x5976cd7dba42 - std::panicking::default_hook::ha25170a15c643514
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x5976cd7987f4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h562adeecbf43c420
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x5976cd7987f4 - test::test_main_with_exit_callback::{{closure}}::h97dd2a879d27e0e4
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5976cd7dc6cb - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7e85cbdbda26fdb7
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x5976cd7dc6cb - std::panicking::rust_panic_with_hook::h0d81afcd829aa24b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x5976cd7dc366 - std::panicking::begin_panic_handler::{{closure}}::hc84a33f1202346cf
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:699:13
[INFO] [stdout]   16:     0x5976cd7daac9 - std::sys::backtrace::__rust_end_short_backtrace::h373067a14f6c59aa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x5976cd7dc02d - __rustc[beb0385846a06d21]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x5976cd7fed80 - core::panicking::panic_fmt::ha33fa2ae772efba9
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x5976cd7fedec - core::panicking::panic::hd2a569f4f37f7e10
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:145:5
[INFO] [stdout]   20:     0x5976cd7fecf9 - core::option::unwrap_failed::ha14784b3b8a80e23
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/option.rs:2072:5
[INFO] [stdout]   21:     0x5976cd74e3df - core::option::Option<T>::unwrap::h9065d0e5201174f9
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/option.rs:1005:21
[INFO] [stdout]   22:     0x5976cd74e3df - mini_lsm_starter::tests::week1_day1::test_task4_storage_integration::he714a464463f95c0
[INFO] [stdout]   23:     0x5976cd74e3df - mini_lsm_starter::tests::week1_day1::test_task4_storage_integration::{{closure}}::h7f4cef2dd6c2dd80
[INFO] [stdout]                                at /opt/rustwide/workdir/mini-lsm-starter/src/tests/week1_day1.rs:140:36
[INFO] [stdout]   24:     0x5976cd74e3df - core::ops::function::FnOnce::call_once::he160b86ee9abd84c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x5976cd79df2b - core::ops::function::FnOnce::call_once::hf84b9c3d864a6959
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x5976cd79df2b - test::__rust_begin_short_backtrace::h5724e31441c16fcb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:648:18
[INFO] [stdout]   27:     0x5976cd79d16e - test::run_test_in_process::{{closure}}::hbc28c9aa91793d7d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:74
[INFO] [stdout]   28:     0x5976cd79d16e - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc17b0e238c0f8f3e
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   29:     0x5976cd79d16e - std::panicking::catch_unwind::do_call::hcdbce0d6dd6c83ce
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   30:     0x5976cd79d16e - std::panicking::catch_unwind::h9477967ceea044e8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   31:     0x5976cd79d16e - std::panic::catch_unwind::h616a2e249da12e16
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   32:     0x5976cd79d16e - test::run_test_in_process::h2758deb0f2e54430
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:27
[INFO] [stdout]   33:     0x5976cd79d16e - test::run_test::{{closure}}::habe5cd2564b18aaa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:592:43
[INFO] [stdout]   34:     0x5976cd760d14 - test::run_test::{{closure}}::h9a0a6928f1a15421
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:622:41
[INFO] [stdout]   35:     0x5976cd760d14 - std::sys::backtrace::__rust_begin_short_backtrace::hd68b5332434a22ca
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   36:     0x5976cd7646ba - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h264ddcc3098eacae
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   37:     0x5976cd7646ba - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9fa39489749d6f3c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   38:     0x5976cd7646ba - std::panicking::catch_unwind::do_call::hb9a1944b9f85100f
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   39:     0x5976cd7646ba - std::panicking::catch_unwind::h0c6f100786c0dad8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   40:     0x5976cd7646ba - std::panic::catch_unwind::hf6084e2723385823
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   41:     0x5976cd7646ba - std::thread::Builder::spawn_unchecked_::{{closure}}::hf0af58ce658143ad
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   42:     0x5976cd7646ba - core::ops::function::FnOnce::call_once{{vtable.shim}}::h88a14f9b2e79f9de
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   43:     0x5976cd7df907 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf31256ba38644b65
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   44:     0x5976cd7df907 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h100ad77f3448041b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   45:     0x5976cd7df907 - std::sys::pal::unix::thread::Thread::new::thread_start::h1a22ded422ce395b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   46:     0x7c5fcbe63aa4 - <unknown>
[INFO] [stdout]   47:     0x7c5fcbef0a34 - clone
[INFO] [stdout]   48:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     tests::week1_day1::test_task3_storage_integration
[INFO] [stdout]     tests::week1_day1::test_task4_storage_integration
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 4 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `-p mini-lsm-starter --lib`
[INFO] running `Command { std: "docker" "inspect" "166e1e6b053995bd3102b239d759fb2fe715f0666ef9431f8d7faa2b83518912", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "166e1e6b053995bd3102b239d759fb2fe715f0666ef9431f8d7faa2b83518912", kill_on_drop: false }`
[INFO] [stdout] 166e1e6b053995bd3102b239d759fb2fe715f0666ef9431f8d7faa2b83518912
