[INFO] updating cached repository https://github.com/besok/configdb
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/besok/configdb
[INFO] [stderr]    33f440f..6e28c8c  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6e28c8c10fd38db957764155aa0110e01aed3bad
[INFO] checking besok/configdb against try#662bf71cc5bbfe44a109ab5b7205e12ec319754c for pr-67531
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbesok%2Fconfigdb" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/besok/configdb on toolchain 662bf71cc5bbfe44a109ab5b7205e12ec319754c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+662bf71cc5bbfe44a109ab5b7205e12ec319754c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/besok/configdb
[INFO] finished tweaking git repo https://github.com/besok/configdb
[INFO] tweaked toml for git repo https://github.com/besok/configdb written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/besok/configdb already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+662bf71cc5bbfe44a109ab5b7205e12ec319754c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+662bf71cc5bbfe44a109ab5b7205e12ec319754c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1c4dcd1fa3b3df683cf496429d04cf9e4b9ecf8c41bbf69e64ba777df36eeb74
[INFO] running `"docker" "start" "-a" "1c4dcd1fa3b3df683cf496429d04cf9e4b9ecf8c41bbf69e64ba777df36eeb74"`
[INFO] [stderr]    Compiling libc v0.2.64
[INFO] [stderr]     Checking getrandom v0.1.12
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking cfgdb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::store::memory::skip_list::PrevSearchStep::FromHead`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use crate::store::memory::skip_list::PrevSearchStep::FromHead;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error`, `Formatter`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:16:23
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::fmt::{Debug, Formatter, Error};
[INFO] [stderr]    |                       ^^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::net::Shutdown::Read`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use std::net::Shutdown::Read;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::store::memory::skip_list::PrevSearchStep::FromHead`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use crate::store::memory::skip_list::PrevSearchStep::FromHead;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Error`, `Formatter`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:16:23
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::fmt::{Debug, Formatter, Error};
[INFO] [stderr]    |                       ^^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::net::Shutdown::Read`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use std::net::Shutdown::Read;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `LOCK_FILE`
[INFO] [stderr]   --> src/store/transaction_log.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | static LOCK_FILE: &str = "log.lock";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `IDX_FILE_NAME`
[INFO] [stderr]   --> src/store/transaction_log.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | static IDX_FILE_NAME: &str = "log_idx.cfgdb";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `LOG_FILE_NAME`
[INFO] [stderr]   --> src/store/transaction_log.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | static LOG_FILE_NAME: &str = "log_data.cfgdb";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `BACKUP_EXT`
[INFO] [stderr]   --> src/store/transaction_log.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | static BACKUP_EXT: &str = "cfgdb.bck";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove_files`
[INFO] [stderr]   --> src/store/transaction_log.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     pub fn remove_files(&self) -> io::Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `create_force`
[INFO] [stderr]   --> src/store/transaction_log.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn create_force(dir_str: &str) -> StoreResult<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `create`
[INFO] [stderr]   --> src/store/transaction_log.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn create(dir_str: &str) -> StoreResult<Self> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backup`
[INFO] [stderr]    --> src/store/transaction_log.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn backup(&self) -> StoreResult<()> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `push`
[INFO] [stderr]    --> src/store/transaction_log.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 |     pub fn push(&self, record: &Record) -> StoreResult<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_all_from_end`
[INFO] [stderr]    --> src/store/transaction_log.rs:133:5
[INFO] [stderr]     |
[INFO] [stderr] 133 |     pub fn read_all_from_end(&self, number_from_end: usize) -> StoreResult<Vec<Record>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_from_end`
[INFO] [stderr]    --> src/store/transaction_log.rs:160:5
[INFO] [stderr]     |
[INFO] [stderr] 160 |     pub fn read_from_end(&self, pos_from_end: usize) -> StoreResult<Record> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `size_in_bytes`
[INFO] [stderr]    --> src/store/transaction_log.rs:303:5
[INFO] [stderr]     |
[INFO] [stderr] 303 |     pub fn size_in_bytes(&self) -> u32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert_record`
[INFO] [stderr]    --> src/store/transaction_log.rs:307:5
[INFO] [stderr]     |
[INFO] [stderr] 307 |     pub fn insert_record(key: Vec<u8>, val: Vec<u8>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `delete_record`
[INFO] [stderr]    --> src/store/transaction_log.rs:310:5
[INFO] [stderr]     |
[INFO] [stderr] 310 |     pub fn delete_record(key: Vec<u8>, val: Vec<u8>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `lock_record`
[INFO] [stderr]    --> src/store/transaction_log.rs:313:5
[INFO] [stderr]     |
[INFO] [stderr] 313 |     pub fn lock_record(key: Vec<u8>, val: Vec<u8>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `op_from`
[INFO] [stderr]    --> src/store/transaction_log.rs:318:5
[INFO] [stderr]     |
[INFO] [stderr] 318 |     fn op_from(operation: RecordType, key: Vec<u8>, val: Vec<u8>) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `create`
[INFO] [stderr]    --> src/store/transaction_log.rs:331:5
[INFO] [stderr]     |
[INFO] [stderr] 331 |     pub fn create(val: u32) -> Index {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_value`
[INFO] [stderr]    --> src/store/transaction_log.rs:335:5
[INFO] [stderr]     |
[INFO] [stderr] 335 |     pub fn get_value(&self) -> u32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `array_to_bytes`
[INFO] [stderr]    --> src/store/transaction_log.rs:339:5
[INFO] [stderr]     |
[INFO] [stderr] 339 |     pub fn array_to_bytes<T: ToBytes>(idx_array: &Vec<T>) -> Vec<u8> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `from_bytes_array`
[INFO] [stderr]    --> src/store/transaction_log.rs:346:5
[INFO] [stderr]     |
[INFO] [stderr] 346 |     pub fn from_bytes_array(bytes: &[u8]) -> StoreResult<Vec<Index>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `time_now_millis`
[INFO] [stderr]    --> src/store/transaction_log.rs:368:4
[INFO] [stderr]     |
[INFO] [stderr] 368 | fn time_now_millis() -> u128 {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `append_item`
[INFO] [stderr]   --> src/store/files.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn append_item<T: ToBytes>(p: &Path, item: &T) -> io::Result<usize> {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `append_bytes`
[INFO] [stderr]   --> src/store/files.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn append_bytes(p: &Path, bytes: &[u8]) -> io::Result<usize> {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `copy_file`
[INFO] [stderr]   --> src/store/files.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn copy_file(src: &Path, dst: &Path) -> Result<(), LogError> {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_slice`
[INFO] [stderr]   --> src/store/files.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn read_slice<T: FromBytes>(p: &Path, from: u64, number: u64) -> Result<T, LogError> {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_from_end`
[INFO] [stderr]   --> src/store/files.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | pub fn read_from_end<T: FromBytes>(p: &Path, number: u64) -> Result<T, LogError> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_slice_from_end`
[INFO] [stderr]   --> src/store/files.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn read_slice_from_end<T: FromBytes>(p: &Path, from: u64, number: u64) -> Result<T, LogError> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_all_file_bytes`
[INFO] [stderr]   --> src/store/files.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn read_all_file_bytes(p: &Path) -> Result<Vec<u8>, LogError> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_slice_bytes_internally`
[INFO] [stderr]   --> src/store/files.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn read_slice_bytes_internally(from: u64, to: u64, file_size: u64, f: File) -> Result<Vec<u8>, LogError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LevelGenerator`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | struct LevelGenerator {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn new(total: usize) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `random`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn random(&mut self) -> usize {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:53:5
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn new(next: Option<Rc<RefCell<Node<K, V>>>>) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn empty() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `try_upd_head`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:61:5
[INFO] [stderr]    |
[INFO] [stderr] 61 |     fn try_upd_head(&mut self, node: Rc<RefCell<Node<K, V>>>) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `PrevSearchStep`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:86:6
[INFO] [stderr]    |
[INFO] [stderr] 86 | enum PrevSearchStep {
[INFO] [stderr]    |      ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `SearchResult`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:92:6
[INFO] [stderr]    |
[INFO] [stderr] 92 | enum SearchResult<K: Ord + Clone + Debug, V: Clone + Debug> {
[INFO] [stderr]    |      ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     fn new(key: K, val: V, level: usize) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_with`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:103:5
[INFO] [stderr]     |
[INFO] [stderr] 103 |     fn new_with(key: K, val: V, level: usize) -> SkipNode<K, V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_under`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     fn set_under(&mut self, under: Option<SkipNode<K, V>>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_under_to_node`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:110:5
[INFO] [stderr]     |
[INFO] [stderr] 110 |     fn set_under_to_node(node: SkipNode<K, V>, under: SkipNode<K, V>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:114:5
[INFO] [stderr]     |
[INFO] [stderr] 114 |     fn value(&self) -> V {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_value`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:118:5
[INFO] [stderr]     |
[INFO] [stderr] 118 |     fn set_value(&mut self, val: V) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn next(node: SkipNode<K, V>) -> Option<SkipNode<K, V>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `prev`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:128:5
[INFO] [stderr]     |
[INFO] [stderr] 128 |     fn prev(node: SkipNode<K, V>) -> Option<SkipNode<K, V>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_next`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:133:5
[INFO] [stderr]     |
[INFO] [stderr] 133 |     fn set_next(node: SkipNode<K, V>, next_node: SkipNode<K, V>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_prev`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 |     fn set_prev(node: SkipNode<K, V>, prev_node: SkipNode<K, V>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compare`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:164:5
[INFO] [stderr]     |
[INFO] [stderr] 164 |     fn compare(&self, key: &K, prev_step: PrevSearchStep) -> SearchResult<K, V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_val_to_node`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:187:5
[INFO] [stderr]     |
[INFO] [stderr] 187 |     fn set_val_to_node(node: SkipNode<K, V>, val: V) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compare_by_key`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:190:5
[INFO] [stderr]     |
[INFO] [stderr] 190 |     fn compare_by_key(left: SkipNode<K, V>, right: SkipNode<K, V>) -> Option<Ordering> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compare_by_level`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:195:5
[INFO] [stderr]     |
[INFO] [stderr] 195 |     fn compare_by_level(left: SkipNode<K, V>, right: SkipNode<K, V>) -> Option<Ordering> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `connect`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:200:5
[INFO] [stderr]     |
[INFO] [stderr] 200 |     fn connect(left: SkipNode<K, V>, right: SkipNode<K, V>) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SkipList`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:209:8
[INFO] [stderr]     |
[INFO] [stderr] 209 | struct SkipList<K: Ord + Clone + Debug, V: Clone + Debug> {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:216:5
[INFO] [stderr]     |
[INFO] [stderr] 216 |     pub fn new() -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `with_capacity`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:219:5
[INFO] [stderr]     |
[INFO] [stderr] 219 |     pub fn with_capacity(exp_cap: usize) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:226:5
[INFO] [stderr]     |
[INFO] [stderr] 226 |     pub fn search(&self, key: &K) -> Option<V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:233:5
[INFO] [stderr]     |
[INFO] [stderr] 233 |     pub fn insert(&mut self, key: K, val: V) -> Option<V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `search_in`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:295:5
[INFO] [stderr]     |
[INFO] [stderr] 295 |     fn search_in(&self, node: Rc<RefCell<Node<K, V>>>, key: &K) -> Option<V> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `first`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:314:5
[INFO] [stderr]     |
[INFO] [stderr] 314 |     fn first(&self) -> Option<Rc<RefCell<Node<K, V>>>> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/store/transaction_log.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         self.close();
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/store/memory/skip_list.rs:19:18
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K: Ord + Clone + Debug, V: Clone + Debug> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]    |                  ^^^   ^^^^^   ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stderr] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K, V: Clone + Debug> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]  --|          --   --
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/store/memory/skip_list.rs:19:42
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K: Ord + Clone + Debug, V: Clone + Debug> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]    |                                          ^^^^^   ^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K: Ord + Clone + Debug, V> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]    |                                --     --
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `BACKUP_EXT`
[INFO] [stderr]   --> src/store/transaction_log.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | static BACKUP_EXT: &str = "cfgdb.bck";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `backup`
[INFO] [stderr]    --> src/store/transaction_log.rs:106:5
[INFO] [stderr]     |
[INFO] [stderr] 106 |     pub fn backup(&self) -> StoreResult<()> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `copy_file`
[INFO] [stderr]   --> src/store/files.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn copy_file(src: &Path, dst: &Path) -> Result<(), LogError> {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/store/memory/skip_list.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn empty() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:114:5
[INFO] [stderr]     |
[INFO] [stderr] 114 |     fn value(&self) -> V {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set_val_to_node`
[INFO] [stderr]    --> src/store/memory/skip_list.rs:187:5
[INFO] [stderr]     |
[INFO] [stderr] 187 |     fn set_val_to_node(node: SkipNode<K, V>, val: V) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/store/transaction_log.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |         self.close();
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/transaction_log.rs:401:13
[INFO] [stderr]     |
[INFO] [stderr] 401 |             t_log.remove_files();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/transaction_log.rs:433:13
[INFO] [stderr]     |
[INFO] [stderr] 433 |             t_log.remove_files();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/transaction_log.rs:457:13
[INFO] [stderr]     |
[INFO] [stderr] 457 |             t_log.remove_files();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/transaction_log.rs:475:13
[INFO] [stderr]     |
[INFO] [stderr] 475 |             t_log.remove_files();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |         append_item(p, &Index::create(1));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:118:9
[INFO] [stderr]     |
[INFO] [stderr] 118 |         append_item(p, &Index::create(2));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:119:9
[INFO] [stderr]     |
[INFO] [stderr] 119 |         append_item(p, &Index::create(3));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:120:9
[INFO] [stderr]     |
[INFO] [stderr] 120 |         append_item(p, &Index::create(4));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:121:9
[INFO] [stderr]     |
[INFO] [stderr] 121 |         append_item(p, &Index::create(5));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:176:9
[INFO] [stderr]     |
[INFO] [stderr] 176 |         append_item(idx_file, &Index::create(insert_rec.size_in_bytes()));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:177:9
[INFO] [stderr]     |
[INFO] [stderr] 177 |         append_item(idx_file, &Index::create(delete_rec.size_in_bytes()));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |         append_item(idx_file, &Index::create(lock_rec.size_in_bytes()));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |         append_item(log_file, &insert_rec);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |         append_item(log_file, &delete_rec);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/store/files.rs:182:9
[INFO] [stderr]     |
[INFO] [stderr] 182 |         append_item(log_file, &lock_rec);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/store/memory/skip_list.rs:19:18
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K: Ord + Clone + Debug, V: Clone + Debug> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]    |                  ^^^   ^^^^^   ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stderr] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K, V: Clone + Debug> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]  --|          --   --
[INFO] [stderr] 
[INFO] [stderr] warning: bounds on generic parameters are not enforced in type aliases
[INFO] [stderr]   --> src/store/memory/skip_list.rs:19:42
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K: Ord + Clone + Debug, V: Clone + Debug> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]    |                                          ^^^^^   ^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: the bound will not be checked when the type alias is used, and should be removed
[INFO] [stderr]    |
[INFO] [stderr] 19 | type SkipNode<K: Ord + Clone + Debug, V> = Rc<RefCell<Node<K, V>>>;
[INFO] [stderr]    |                                --     --
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/store/memory/skip_list.rs:403:30
[INFO] [stderr]     |
[INFO] [stderr] 403 |             assert_eq!(true, gen.random() >= 0)
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.31s
[INFO] running `"docker" "inspect" "1c4dcd1fa3b3df683cf496429d04cf9e4b9ecf8c41bbf69e64ba777df36eeb74"`
[INFO] running `"docker" "rm" "-f" "1c4dcd1fa3b3df683cf496429d04cf9e4b9ecf8c41bbf69e64ba777df36eeb74"`
[INFO] [stdout] 1c4dcd1fa3b3df683cf496429d04cf9e4b9ecf8c41bbf69e64ba777df36eeb74