[INFO] cloning repository https://github.com/mdomans/LFU
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mdomans/LFU" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdomans%2FLFU", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdomans%2FLFU'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0c63537929a09844fee0074849f4578751695002
[INFO] checking mdomans/LFU against try#2278ef25f90817c20d6dd0d2da58a990eb6f53cb for pr-145108-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmdomans%2FLFU" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mdomans/LFU
[INFO] finished tweaking git repo https://github.com/mdomans/LFU
[INFO] tweaked toml for git repo https://github.com/mdomans/LFU written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mdomans/LFU on toolchain 2278ef25f90817c20d6dd0d2da58a990eb6f53cb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mdomans/LFU 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" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fa2a27331fa683133fa5ba4a70eed838ee2c82f580ef90a959d934e8e4899d06
[INFO] running `Command { std: "docker" "start" "-a" "fa2a27331fa683133fa5ba4a70eed838ee2c82f580ef90a959d934e8e4899d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa2a27331fa683133fa5ba4a70eed838ee2c82f580ef90a959d934e8e4899d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa2a27331fa683133fa5ba4a70eed838ee2c82f580ef90a959d934e8e4899d06", kill_on_drop: false }`
[INFO] [stdout] fa2a27331fa683133fa5ba4a70eed838ee2c82f580ef90a959d934e8e4899d06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2278ef25f90817c20d6dd0d2da58a990eb6f53cb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5dd020df65c97ff4a2cd8e209965be9440adb3dc97118c72b65130fb7e7007ff
[INFO] running `Command { std: "docker" "start" "-a" "5dd020df65c97ff4a2cd8e209965be9440adb3dc97118c72b65130fb7e7007ff", kill_on_drop: false }`
[INFO] [stderr]     Checking LFU v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lfu::FrequencyNode`
[INFO] [stdout]    --> src/lib.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |     use super::lfu::FrequencyNode;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashMap` and `HashSet`
[INFO] [stdout]    --> src/lib.rs:146:28
[INFO] [stdout]     |
[INFO] [stdout] 146 |     use std::collections::{HashMap, HashSet};
[INFO] [stdout]     |                            ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]  --> src/lib.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FrequencyNode` is never constructed
[INFO] [stdout]   --> src/lib.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub struct FrequencyNode {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Item` is never constructed
[INFO] [stdout]   --> src/lib.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub struct Item {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     impl Item {
[INFO] [stdout]    |     --------- associated function in this implementation
[INFO] [stdout] 25 |         pub fn new (data: String, key: String, frequency_node: Arc<RefCell<FrequencyNode>>) -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LFU` is never constructed
[INFO] [stdout]   --> src/lib.rs:31:16
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub struct LFU {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |     impl FrequencyNode {
[INFO] [stdout]    |     ------------------ associated function in this implementation
[INFO] [stdout] 38 |         pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<S...
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `delete_item`, `set`, `get`, and `print_stats` are never used
[INFO] [stdout]    --> src/lib.rs:50:16
[INFO] [stdout]     |
[INFO] [stdout]  48 |     impl LFU {
[INFO] [stdout]     |     -------- associated items in this implementation
[INFO] [stdout]  49 |
[INFO] [stdout]  50 |         pub fn new() -> Self {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout]  64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  68 |         pub fn set(&mut self, key: String, data:String) {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         pub fn get(&self, key: String) -> Option<String> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |         pub fn print_stats(&self) {
[INFO] [stdout]     |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `LFU` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `lfu`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]  --> src/lib.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `key` is never read
[INFO] [stdout]   --> src/lib.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub struct Item {
[INFO] [stdout]    |                ---- field in this struct
[INFO] [stdout] 19 |         data: String,
[INFO] [stdout] 20 |         key: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Item` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |     impl FrequencyNode {
[INFO] [stdout]    |     ------------------ associated function in this implementation
[INFO] [stdout] 38 |         pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<S...
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete_item` is never used
[INFO] [stdout]   --> src/lib.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     impl LFU {
[INFO] [stdout]    |     -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Weak`
[INFO] [stdout]  --> src/lib.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     use std::sync::{Arc, Weak};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lfu::FrequencyNode`
[INFO] [stdout]    --> src/lib.rs:145:9
[INFO] [stdout]     |
[INFO] [stdout] 145 |     use super::lfu::FrequencyNode;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HashMap` and `HashSet`
[INFO] [stdout]    --> src/lib.rs:146:28
[INFO] [stdout]     |
[INFO] [stdout] 146 |     use std::collections::{HashMap, HashSet};
[INFO] [stdout]     |                            ^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/lib.rs:64:31
[INFO] [stdout]    |
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |                               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]  --> src/lib.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FrequencyNode` is never constructed
[INFO] [stdout]   --> src/lib.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub struct FrequencyNode {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Item` is never constructed
[INFO] [stdout]   --> src/lib.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub struct Item {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:25:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |     impl Item {
[INFO] [stdout]    |     --------- associated function in this implementation
[INFO] [stdout] 25 |         pub fn new (data: String, key: String, frequency_node: Arc<RefCell<FrequencyNode>>) -> Self {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LFU` is never constructed
[INFO] [stdout]   --> src/lib.rs:31:16
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub struct LFU {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |     impl FrequencyNode {
[INFO] [stdout]    |     ------------------ associated function in this implementation
[INFO] [stdout] 38 |         pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<S...
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `delete_item`, `set`, `get`, and `print_stats` are never used
[INFO] [stdout]    --> src/lib.rs:50:16
[INFO] [stdout]     |
[INFO] [stdout]  48 |     impl LFU {
[INFO] [stdout]     |     -------- associated items in this implementation
[INFO] [stdout]  49 |
[INFO] [stdout]  50 |         pub fn new() -> Self {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout]  64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  68 |         pub fn set(&mut self, key: String, data:String) {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |         pub fn get(&self, key: String) -> Option<String> {
[INFO] [stdout]     |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |         pub fn print_stats(&self) {
[INFO] [stdout]     |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Link` is never used
[INFO] [stdout]  --> src/lib.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     type Link = Option<Box<FrequencyNode>>;
[INFO] [stdout]   |          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `key` is never read
[INFO] [stdout]   --> src/lib.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     pub struct Item {
[INFO] [stdout]    |                ---- field in this struct
[INFO] [stdout] 19 |         data: String,
[INFO] [stdout] 20 |         key: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Item` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:38:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |     impl FrequencyNode {
[INFO] [stdout]    |     ------------------ associated function in this implementation
[INFO] [stdout] 38 |         pub fn new(frequency: i32, prev: Option<Arc<RefCell<FrequencyNode>>>, next: Option<Arc<RefCell<FrequencyNode>>>, items: HashSet<S...
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete_item` is never used
[INFO] [stdout]   --> src/lib.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     impl LFU {
[INFO] [stdout]    |     -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 64 |         fn delete_item(&self, item:Item) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "5dd020df65c97ff4a2cd8e209965be9440adb3dc97118c72b65130fb7e7007ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dd020df65c97ff4a2cd8e209965be9440adb3dc97118c72b65130fb7e7007ff", kill_on_drop: false }`
[INFO] [stdout] 5dd020df65c97ff4a2cd8e209965be9440adb3dc97118c72b65130fb7e7007ff