[INFO] cloning repository https://github.com/lurgi/rust-basic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lurgi/rust-basic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flurgi%2Frust-basic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flurgi%2Frust-basic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 533b4cb6b79010c94f3191f5cd3bfcda833b16cf
[INFO] testing lurgi/rust-basic against try#bd7d74411512a3dd3b35d2f699c51dd2557c7e7e+cargoflags=-Zbuild-dir-new-layout for pr-149852-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flurgi%2Frust-basic" "/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/lurgi/rust-basic
[INFO] finished tweaking git repo https://github.com/lurgi/rust-basic
[INFO] tweaked toml for git repo https://github.com/lurgi/rust-basic written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lurgi/rust-basic on toolchain bd7d74411512a3dd3b35d2f699c51dd2557c7e7e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lurgi/rust-basic 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" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 163ec379f2db86e062c0ad214e1ff704065727344c0cd1b08b0869ac7cabf4b4
[INFO] running `Command { std: "docker" "start" "-a" "163ec379f2db86e062c0ad214e1ff704065727344c0cd1b08b0869ac7cabf4b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "163ec379f2db86e062c0ad214e1ff704065727344c0cd1b08b0869ac7cabf4b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "163ec379f2db86e062c0ad214e1ff704065727344c0cd1b08b0869ac7cabf4b4", kill_on_drop: false }`
[INFO] [stdout] 163ec379f2db86e062c0ad214e1ff704065727344c0cd1b08b0869ac7cabf4b4
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "build" "--frozen" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] e5defecaa094a223e547da99ef2340731b0c52692fe9545b359199ab2ace2a7d
[INFO] running `Command { std: "docker" "start" "-a" "e5defecaa094a223e547da99ef2340731b0c52692fe9545b359199ab2ace2a7d", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `thread::sleep`
[INFO] [stdout]   --> src/day15/default_type_params.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 | use std::{ops::Add, thread::sleep};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Not`
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | use std::ops::Not;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::sleep`
[INFO] [stdout]   --> src/day16/parser_struct.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | use std::thread::sleep;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]   --> src/day18/basic_threads.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::time::Duration;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Thread`
[INFO] [stdout]   --> src/day18/mutex_counter.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 | use std::thread::{self, Thread};
[INFO] [stdout]    |                         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]   --> src/day18/producer_consumer.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | use std::fmt::format;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Pending`
[INFO] [stdout]   --> src/day7/todo_system.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 | use std::future::Pending;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn first<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/day20/retry_logic.rs:32:31
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn unreliable_operation(id: u32, fail_count: &mut u32) -> Result<String, String> {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/day6/vehicle.rs:38:22
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Vehicle::Car(str) => 30,
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/day6/vehicle.rs:40:26
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Vehicle::Train { line, station } => 20,
[INFO] [stdout]    |                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `station`
[INFO] [stdout]   --> src/day6/vehicle.rs:40:32
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Vehicle::Train { line, station } => 20,
[INFO] [stdout]    |                                ^^^^^^^ help: try ignoring the field: `station: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/day6/vehicle.rs:48:22
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Vehicle::Car(str) => format!("차종으로 이동"),
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day10_exercises` is never used
[INFO] [stdout]  --> src/day10/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day10_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `FileError` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum FileError {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn read_file(_filename: &str) -> Result<String, FileError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_csv` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn parse_csv(_content: &str) -> Result<Vec<i32>, FileError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_and_parse` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn read_and_parse(_filename: &str) -> Result<Vec<i32>, FileError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_divide_result` is never used
[INFO] [stdout]   --> src/day10/safe_division.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn safe_divide_result(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_divide_option` is never used
[INFO] [stdout]   --> src/day10/safe_division.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn safe_divide_option(_a: i32, _b: i32) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day10/safe_division.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Student` is never constructed
[INFO] [stdout]   --> src/day10/student_registry.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Student {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StudentRegistry` is never constructed
[INFO] [stdout]   --> src/day10/student_registry.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct StudentRegistry {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_student`, `find_by_name`, and `get_grade` are never used
[INFO] [stdout]   --> src/day10/student_registry.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl StudentRegistry {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 45 |     // TODO: new 메서드를 구현하세요
[INFO] [stdout] 46 |     fn new() -> StudentRegistry {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn add_student(&mut self, _student: Student) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn find_by_name(&self, _name: &str) -> Option<&Student> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn get_grade(&self, _name: &str) -> Option<char> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day10/student_registry.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day11_exercises` is never used
[INFO] [stdout]  --> src/day11/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day11_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_add` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn safe_add(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_multiply` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn safe_multiply(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_divide` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn safe_divide(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_formula` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn calculate_formula(_a: i32, _b: i32, _c: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DataError` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 | enum DataError {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_raw_data` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn read_raw_data(_id: u32) -> Result<String, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_numbers` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn parse_numbers(_raw: &str) -> Result<Vec<i32>, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_numbers` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn validate_numbers(_numbers: &[i32]) -> Result<(), DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_average` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn calculate_average(_numbers: &[i32]) -> Result<f64, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_data_pipeline` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn process_data_pipeline(_id: u32) -> Result<f64, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day11/data_pipeline.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RegistrationError` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:41:6
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum RegistrationError {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_email` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn validate_email(_email: &str) -> Result<(), RegistrationError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_password` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn validate_password(_password: &str) -> Result<(), RegistrationError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_age` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn validate_age(_age: u8) -> Result<(), RegistrationError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `register_user` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn register_user(
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day11/user_registration.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day12_exercises` is never used
[INFO] [stdout]  --> src/day12/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day12_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `get`, `remove`, `len`, and `is_empty` are never used
[INFO] [stdout]   --> src/day12/generic_storage.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl<T> Storage<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 43 |     fn new() -> Storage<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn add(&mut self, _item: T) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn get(&self, _index: usize) -> Option<&T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn remove(&mut self, _index: usize) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display_all` is never used
[INFO] [stdout]   --> src/day12/generic_storage.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl<T: std::fmt::Display> Storage<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 74 |     fn display_all(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day12/generic_storage.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_type_and_value` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn print_type_and_value<T: std::fmt::Debug>(_value: T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_last` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_last<T>(_list: &[T]) -> Option<&T> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `swap_pair` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn swap_pair<T>(_pair: (T, T)) -> (T, T) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_index` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn find_index<T: PartialEq>(_list: &[T], _target: &T) -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, `unwrap`, and `map` are never used
[INFO] [stdout]   --> src/day12/wrapper_struct.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl<T> Wrapper<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 38 |     fn new(_value: T) -> Wrapper<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn get(&self) -> &T {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     fn unwrap(self) -> T {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn map<U, F>(self, _f: F) -> Wrapper<U>
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/day12/wrapper_struct.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<T: std::fmt::Display> Wrapper<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 62 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day12/wrapper_struct.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day13_exercises` is never used
[INFO] [stdout]  --> src/day13/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day13_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Product` is never constructed
[INFO] [stdout]   --> src/day13/comparable_product.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Product {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_cheapest` is never used
[INFO] [stdout]   --> src/day13/comparable_product.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn find_cheapest<T: Ord>(items: &[T]) -> &T {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_most_expensive` is never used
[INFO] [stdout]   --> src/day13/comparable_product.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn find_most_expensive<T: Ord>(items: &[T]) -> &T {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/comparable_product.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]   --> src/day13/conditional_methods.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Container<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<T> Container<T> {
[INFO] [stdout]    | -------------------- associated function in this implementation
[INFO] [stdout] 35 |     fn new(value: T) -> Container<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `duplicate` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl<T: Clone> Container<T> {
[INFO] [stdout]    | --------------------------- method in this implementation
[INFO] [stdout] 42 |     fn duplicate(&self) -> (T, T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_greater_than` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl<T: PartialOrd> Container<T> {
[INFO] [stdout]    | -------------------------------- method in this implementation
[INFO] [stdout] 49 |     fn is_greater_than(&self, other: &T) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | impl<T: Display> Container<T> {
[INFO] [stdout]    | ----------------------------- method in this implementation
[INFO] [stdout] 56 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Logger` is never used
[INFO] [stdout]   --> src/day13/logging_system.rs:29:7
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Logger {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConsoleLogger` is never constructed
[INFO] [stdout]   --> src/day13/logging_system.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | struct ConsoleLogger;
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileLogger` is never constructed
[INFO] [stdout]   --> src/day13/logging_system.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct FileLogger {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `log_multiple` is never used
[INFO] [stdout]   --> src/day13/logging_system.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn log_multiple<T: Logger>(logger: &T, messages: &[&str]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/logging_system.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Shape` is never used
[INFO] [stdout]   --> src/day13/shape_trait.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 28 | trait Shape {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/day13/shape_trait.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]   --> src/day13/shape_trait.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Circle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_shape_info` is never used
[INFO] [stdout]   --> src/day13/shape_trait.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn print_shape_info<T: Shape>(shape: &T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/shape_trait.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day14_exercises` is never used
[INFO] [stdout]  --> src/day14/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn run_day14_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `LibraryError` is never used
[INFO] [stdout]   --> src/day14/library_system.rs:54:6
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum LibraryError {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Displayable` is never used
[INFO] [stdout]   --> src/day14/library_system.rs:61:7
[INFO] [stdout]    |
[INFO] [stdout] 61 | trait Displayable {
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Book` is never constructed
[INFO] [stdout]   --> src/day14/library_system.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Book {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Library` is never constructed
[INFO] [stdout]   --> src/day14/library_system.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | struct Library<T: Displayable + Clone> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_book`, `get_book`, `remove_book`, `list_all_books`, and `count` are never used
[INFO] [stdout]    --> src/day14/library_system.rs:94:8
[INFO] [stdout]     |
[INFO] [stdout]  93 | impl<T: Displayable + Clone> Library<T> {
[INFO] [stdout]     | --------------------------------------- associated items in this implementation
[INFO] [stdout]  94 |     fn new() -> Library<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     fn add_book(&mut self, id: u32, book: T) -> Result<(), LibraryError> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn get_book(&self, id: u32) -> Result<&T, LibraryError> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |     fn remove_book(&mut self, id: u32) -> Result<T, LibraryError> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn list_all_books(&self) -> Vec<String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     fn count(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day14/library_system.rs:128:8
[INFO] [stdout]     |
[INFO] [stdout] 128 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `CURRENT_TIME` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | static mut CURRENT_TIME: u64 = 0;
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_current_time` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn get_current_time() -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `advance_time` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn advance_time(seconds: u64) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CacheError` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 | enum CacheError {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Cacheable` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:74:7
[INFO] [stdout]    |
[INFO] [stdout] 74 | trait Cacheable {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CachedValue` is never constructed
[INFO] [stdout]   --> src/day14/cache_system.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct CachedValue<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/day14/cache_system.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 93 | struct Cache<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set`, `get`, `remove`, `clear`, and `size` are never used
[INFO] [stdout]    --> src/day14/cache_system.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl<T: Clone> Cache<T> {
[INFO] [stdout]     | ----------------------- associated items in this implementation
[INFO] [stdout] 100 |     fn new() -> Cache<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn set(&mut self, key: String, value: T, ttl: u64) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     fn get(&self, key: &str) -> Result<T, CacheError> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     fn remove(&mut self, key: &str) -> Result<T, CacheError> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 143 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 147 |     fn size(&self) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day14/cache_system.rs:152:8
[INFO] [stdout]     |
[INFO] [stdout] 152 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day15_exercises` is never used
[INFO] [stdout]  --> src/day15/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day15_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Container` is never used
[INFO] [stdout]   --> src/day15/associated_types_container.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | trait Container {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VecContainer` is never constructed
[INFO] [stdout]   --> src/day15/associated_types_container.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct VecContainer {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringContainer` is never constructed
[INFO] [stdout]   --> src/day15/associated_types_container.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct StringContainer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_container` is never used
[INFO] [stdout]   --> src/day15/associated_types_container.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn print_container(container: &impl Container) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day15/associated_types_container.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/day15/default_type_params.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Point<T = i32> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/day15/default_type_params.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 32 |     fn new(x: T, y: T) -> Point<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/day15/default_type_params.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl<T: std::fmt::Display> Point<T> {
[INFO] [stdout]    | ----------------------------------- method in this implementation
[INFO] [stdout] 51 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day15/default_type_params.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Notification` is never used
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 39 | trait Notification {
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EmailNotification` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct EmailNotification {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SmsNotification` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct SmsNotification {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PushNotification` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct PushNotification {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NotificationService` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct NotificationService {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_channel`, and `broadcast` are never used
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | impl NotificationService {
[INFO] [stdout]    | ------------------------ associated items in this implementation
[INFO] [stdout] 84 |     fn new() -> NotificationService {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 90 |     fn add_channel(&mut self, channel: Box<dyn Notification>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |     fn broadcast(&self, message: &str) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day15/trait_objects_notification.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Processor` is never used
[INFO] [stdout]   --> src/day15/combined_processor.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 34 | trait Processor {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UppercaseProcessor` is never constructed
[INFO] [stdout]   --> src/day15/combined_processor.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct UppercaseProcessor;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LengthProcessor` is never constructed
[INFO] [stdout]   --> src/day15/combined_processor.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct LengthProcessor;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DoubleProcessor` is never constructed
[INFO] [stdout]   --> src/day15/combined_processor.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct DoubleProcessor;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day15/combined_processor.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day16_exercises` is never used
[INFO] [stdout]  --> src/day16/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day16_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Context<'a, 'b> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `title`, `body`, and `display` are never used
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<'a, 'b> Context<'a, 'b> {
[INFO] [stdout]    | ---------------------------- associated items in this implementation
[INFO] [stdout] 35 |     fn new(title: &'a str, body: &'b str) -> Context<'a, 'b> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn title(&self) -> &'a str {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn body(&self) -> &'b str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_summary` is never used
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn create_summary<'a>(ctx: &Context<'a, '_>) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn first<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `contains_substring` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn contains_substring<'a>(text: &'a str, pattern: &str) -> Option<&'a str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TextSlice` is never constructed
[INFO] [stdout]   --> src/day16/lifetime_struct.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct TextSlice<'a> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `text`, `len`, and `concat` are never used
[INFO] [stdout]   --> src/day16/lifetime_struct.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<'a> TextSlice<'a> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 36 |     fn new(content: &'a str, start: usize, end: usize) -> TextSlice<'a> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn text(&self) -> &str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn concat(&self, other: &str) -> String {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/lifetime_struct.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/day16/parser_struct.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Parser<'a> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `current_char`, `advance`, `remaining`, and `is_finished` are never used
[INFO] [stdout]   --> src/day16/parser_struct.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<'a> Parser<'a> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 39 |     fn new(input: &'a str) -> Parser<'a> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn current_char(&self) -> Option<char> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn advance(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn remaining(&self) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn is_finished(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/parser_struct.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day17_exercises` is never used
[INFO] [stdout]  --> src/day17/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day17_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/day17/box_linked_list.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]   --> src/day17/box_linked_list.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl List {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 37 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn prepend(self, value: i32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/box_linked_list.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Task` is never constructed
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Task {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TaskManager` is never constructed
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct TaskManager {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_task`, `complete_task`, `list_tasks`, and `completed_count` are never used
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl TaskManager {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 54 |     fn new() -> TaskManager {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn add_task(&mut self, id: u32, description: String) -> Rc<RefCell<Task>> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn complete_task(&self, task: &Rc<RefCell<Task>>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn list_tasks(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn completed_count(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Node {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Graph` is never constructed
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Graph {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_node`, `node_count`, and `total_references` are never used
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | impl Graph {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 47 |     fn new() -> Graph {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn add_node(&mut self, value: i32) -> Rc<Node> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn node_count(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn total_references(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/day17/refcell_interior_mutability.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `increment`, `get`, and `reset` are never used
[INFO] [stdout]   --> src/day17/refcell_interior_mutability.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Counter {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 34 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     fn increment(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn get(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn reset(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/refcell_interior_mutability.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day18_exercises` is never used
[INFO] [stdout]  --> src/day18/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day18_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_threads` is never used
[INFO] [stdout]   --> src/day18/basic_threads.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn create_threads(count: u32) -> Vec<thread::JoinHandle<u32>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wait_all` is never used
[INFO] [stdout]   --> src/day18/basic_threads.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn wait_all(handles: Vec<thread::JoinHandle<u32>>) -> Vec<u32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/basic_threads.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Task` is never constructed
[INFO] [stdout]   --> src/day18/channel_messaging.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Task {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TaskResult` is never constructed
[INFO] [stdout]   --> src/day18/channel_messaging.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct TaskResult {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_tasks` is never used
[INFO] [stdout]   --> src/day18/channel_messaging.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn process_tasks(tasks: Vec<Task>) -> Vec<TaskResult> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/channel_messaging.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/day18/mutex_counter.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `increment`, `decrement`, and `get` are never used
[INFO] [stdout]   --> src/day18/mutex_counter.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl Counter {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 39 |     fn new() -> Arc<Counter> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn increment(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn decrement(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn get(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_increments` is never used
[INFO] [stdout]   --> src/day18/mutex_counter.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn parallel_increments(counter: Arc<Counter>, threads: u32, increments_per_thread: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/mutex_counter.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:33:6
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `producer` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn producer(id: u32, tx: mpsc::Sender<Message>, count: u32) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `consumer` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn consumer(rx: mpsc::Receiver<Message>) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_producer_consumer` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn run_producer_consumer(producer_count: u32, messages_per_producer: u32) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day20_exercises` is never used
[INFO] [stdout]  --> src/day20/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day20_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compute` is never used
[INFO] [stdout]   --> src/day20/tokio_spawn_parallel.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 | async fn compute(id: u32, duration_ms: u64) -> u32 {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_compute` is never used
[INFO] [stdout]   --> src/day20/tokio_spawn_parallel.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | async fn parallel_compute(tasks: Vec<(u32, u64)>) -> Vec<u32> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/tokio_spawn_parallel.rs:42:14
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProcessError` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum ProcessError {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_with_validation` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 | async fn process_with_validation(value: i32) -> Result<i32, ProcessError> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_with_timeout` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:52:10
[INFO] [stdout]    |
[INFO] [stdout] 52 | async fn process_with_timeout(value: i32, timeout_ms: u64) -> Result<i32, ProcessError> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_batch` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:66:10
[INFO] [stdout]    |
[INFO] [stdout] 66 | async fn process_batch(values: Vec<i32>) -> Vec<Result<i32, ProcessError>> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:83:14
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ApiResponse` is never constructed
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct ApiResponse {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HttpClient` is never constructed
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct HttpClient;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, and `post` are never used
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | impl HttpClient {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 47 |     fn new() -> HttpClient {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     async fn get(&self, url: &str) -> Result<ApiResponse, String> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     async fn post(&self, url: &str, body: &str) -> Result<ApiResponse, String> {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fetch_multiple` is never used
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:79:10
[INFO] [stdout]    |
[INFO] [stdout] 79 | async fn fetch_multiple(urls: Vec<String>) -> Vec<Result<ApiResponse, String>> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:98:14
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unreliable_operation` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn unreliable_operation(id: u32, fail_count: &mut u32) -> Result<String, String> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `retry_operation` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 | async fn retry_operation<F, Fut, T, E>(
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_with_retry` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:71:10
[INFO] [stdout]    |
[INFO] [stdout] 71 | async fn process_with_retry(id: u32) -> Result<String, String> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:90:14
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `owner` is never read
[INFO] [stdout]   --> src/day5/bank_account.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct BankAccount {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 29 |     // TODO: 필드들을 정의하세요
[INFO] [stdout] 30 |     owner: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BankAccount` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_balance` is never used
[INFO] [stdout]   --> src/day5/bank_account.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl BankAccount {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn get_balance(&self) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/day6/message.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 28 -     Text(String),
[INFO] [stdout] 28 +     Text(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `url`, `width`, and `height` are never read
[INFO] [stdout]   --> src/day6/message.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Image {
[INFO] [stdout]    |     ----- fields in this variant
[INFO] [stdout] 30 |         url: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 31 |         width: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 32 |         height: u32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `url` is never read
[INFO] [stdout]   --> src/day6/message.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     Video {
[INFO] [stdout]    |     ----- field in this variant
[INFO] [stdout] 35 |         url: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_message` is never used
[INFO] [stdout]   --> src/day6/message.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn process_message(msg: &Message) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day7_exercises` is never used
[INFO] [stdout]  --> src/day7/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn run_day7_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TodoStatus` is never used
[INFO] [stdout]   --> src/day7/todo_system.rs:77:6
[INFO] [stdout]    |
[INFO] [stdout] 77 | enum TodoStatus {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Todo` is never constructed
[INFO] [stdout]   --> src/day7/todo_system.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 | struct Todo {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `start`, `complete`, `is_completed`, and `status_text` are never used
[INFO] [stdout]    --> src/day7/todo_system.rs:97:8
[INFO] [stdout]     |
[INFO] [stdout]  95 | impl Todo {
[INFO] [stdout]     | --------- associated items in this implementation
[INFO] [stdout]  96 |     // TODO: new 메서드 구현
[INFO] [stdout]  97 |     fn new(id: u32, title: String, description: String) -> Todo {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn start(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |     fn complete(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     fn is_completed(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     fn status_text(&self) -> &str {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TodoList` is never constructed
[INFO] [stdout]    --> src/day7/todo_system.rs:136:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | struct TodoList {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/day7/todo_system.rs:145:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | impl TodoList {
[INFO] [stdout]     | ------------- associated items in this implementation
[INFO] [stdout] 144 |     // TODO: new 메서드 구현
[INFO] [stdout] 145 |     fn new() -> TodoList {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |     fn add(&mut self, title: String, description: String) -> u32 {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 160 |     fn get(&self, id: u32) -> Option<&Todo> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 165 |     fn get_mut(&mut self, id: u32) -> Option<&mut Todo> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 169 |     fn remove(&mut self, id: u32) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn list_all(&self) -> &Vec<Todo> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 183 |     fn list_by_status(&self, status: TodoStatus) -> Vec<&Todo> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 191 |     fn count_by_status(&self, status: TodoStatus) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day7/todo_system.rs:199:8
[INFO] [stdout]     |
[INFO] [stdout] 199 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day8_exercises` is never used
[INFO] [stdout]  --> src/day8/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day8_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |         pub fn add(a: f64, b: f64) -> f64 {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `subtract` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |         pub fn subtract(a: f64, b: f64) -> f64 {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |         pub fn multiply(a: f64, b: f64) -> f64 {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `divide` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:35:16
[INFO] [stdout]    |
[INFO] [stdout] 35 |         pub fn divide(a: f64, b: f64) -> Option<f64> {
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `power` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:44:16
[INFO] [stdout]    |
[INFO] [stdout] 44 |         pub fn power(base: f64, exponent: f64) -> f64 {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square_root` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:48:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |         pub fn square_root(x: f64) -> Option<f64> {
[INFO] [stdout]    |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day8/config_management.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AppConfig` is never constructed
[INFO] [stdout]   --> src/day8/config_management.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub struct AppConfig {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_app_name`, and `enable_debug` are never used
[INFO] [stdout]   --> src/day8/config_management.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |     impl AppConfig {
[INFO] [stdout]    |     -------------- associated items in this implementation
[INFO] [stdout] 37 |         pub fn new(app_name: String, version: String) -> AppConfig {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |         pub fn get_app_name(&self) -> &str {
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         pub fn enable_debug(&mut self) {
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day8/library_system.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Book` is never constructed
[INFO] [stdout]   --> src/day8/library_system.rs:24:20
[INFO] [stdout]    |
[INFO] [stdout] 24 |         pub struct Book {
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_book` is never used
[INFO] [stdout]   --> src/day8/library_system.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |         pub fn create_book(title: String, author: String) -> Book {
[INFO] [stdout]    |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Member` is never constructed
[INFO] [stdout]   --> src/day8/library_system.rs:37:20
[INFO] [stdout]    |
[INFO] [stdout] 37 |         pub struct Member {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_member` is never used
[INFO] [stdout]   --> src/day8/library_system.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |         pub fn create_member(name: String, id: u32) -> Member {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day9_exercises` is never used
[INFO] [stdout]  --> src/day9/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day9_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PhoneBook` is never constructed
[INFO] [stdout]   --> src/day9/phone_book.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct PhoneBook {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `get`, `remove`, and `list_all` are never used
[INFO] [stdout]   --> src/day9/phone_book.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl PhoneBook {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 39 |     // TODO: new 메서드를 구현하세요
[INFO] [stdout] 40 |     fn new() -> PhoneBook {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn add(&mut self, _name: String, _phone: String) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn get(&self, _name: &str) -> Option<&String> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn remove(&mut self, _name: &str) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn list_all(&self) -> Vec<(&String, &String)> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day9/phone_book.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_average` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn calculate_average(_scores: &Vec<i32>) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_highest` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn find_highest(_scores: &Vec<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_lowest` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn find_lowest(_scores: &Vec<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `filter_passing` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn filter_passing(_scores: &Vec<i32>, _passing_score: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_words` is never used
[INFO] [stdout]   --> src/day9/word_frequency.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn count_words(_text: &str) -> HashMap<String, usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_most_frequent` is never used
[INFO] [stdout]   --> src/day9/word_frequency.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn find_most_frequent(_word_counts: &HashMap<String, usize>) -> Option<(String, usize)> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day9/word_frequency.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `Command { std: "docker" "inspect" "e5defecaa094a223e547da99ef2340731b0c52692fe9545b359199ab2ace2a7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5defecaa094a223e547da99ef2340731b0c52692fe9545b359199ab2ace2a7d", kill_on_drop: false }`
[INFO] [stdout] e5defecaa094a223e547da99ef2340731b0c52692fe9545b359199ab2ace2a7d
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "--no-run" "--message-format=json" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] 74114cf8de697d1ced1bae67548c1f8c05278bd8c74777735bc83e3d86bb2fca
[INFO] running `Command { std: "docker" "start" "-a" "74114cf8de697d1ced1bae67548c1f8c05278bd8c74777735bc83e3d86bb2fca", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-basic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `thread::sleep`
[INFO] [stdout]   --> src/day15/default_type_params.rs:22:21
[INFO] [stdout]    |
[INFO] [stdout] 22 | use std::{ops::Add, thread::sleep};
[INFO] [stdout]    |                     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Not`
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | use std::ops::Not;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::sleep`
[INFO] [stdout]   --> src/day16/parser_struct.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | use std::thread::sleep;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]   --> src/day18/basic_threads.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::time::Duration;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Thread`
[INFO] [stdout]   --> src/day18/mutex_counter.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 | use std::thread::{self, Thread};
[INFO] [stdout]    |                         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]   --> src/day18/producer_consumer.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | use std::fmt::format;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Pending`
[INFO] [stdout]   --> src/day7/todo_system.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 | use std::future::Pending;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn first<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/day20/retry_logic.rs:32:31
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn unreliable_operation(id: u32, fail_count: &mut u32) -> Result<String, String> {
[INFO] [stdout]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/day6/vehicle.rs:38:22
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Vehicle::Car(str) => 30,
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line`
[INFO] [stdout]   --> src/day6/vehicle.rs:40:26
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Vehicle::Train { line, station } => 20,
[INFO] [stdout]    |                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `station`
[INFO] [stdout]   --> src/day6/vehicle.rs:40:32
[INFO] [stdout]    |
[INFO] [stdout] 40 |         Vehicle::Train { line, station } => 20,
[INFO] [stdout]    |                                ^^^^^^^ help: try ignoring the field: `station: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/day6/vehicle.rs:48:22
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Vehicle::Car(str) => format!("차종으로 이동"),
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day10_exercises` is never used
[INFO] [stdout]  --> src/day10/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day10_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `FileError` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum FileError {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn read_file(_filename: &str) -> Result<String, FileError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_csv` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn parse_csv(_content: &str) -> Result<Vec<i32>, FileError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_and_parse` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn read_and_parse(_filename: &str) -> Result<Vec<i32>, FileError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day10/file_simulator.rs:64:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_divide_result` is never used
[INFO] [stdout]   --> src/day10/safe_division.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn safe_divide_result(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_divide_option` is never used
[INFO] [stdout]   --> src/day10/safe_division.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn safe_divide_option(_a: i32, _b: i32) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day10/safe_division.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Student` is never constructed
[INFO] [stdout]   --> src/day10/student_registry.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Student {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StudentRegistry` is never constructed
[INFO] [stdout]   --> src/day10/student_registry.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct StudentRegistry {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_student`, `find_by_name`, and `get_grade` are never used
[INFO] [stdout]   --> src/day10/student_registry.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl StudentRegistry {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 45 |     // TODO: new 메서드를 구현하세요
[INFO] [stdout] 46 |     fn new() -> StudentRegistry {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn add_student(&mut self, _student: Student) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn find_by_name(&self, _name: &str) -> Option<&Student> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn get_grade(&self, _name: &str) -> Option<char> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day10/student_registry.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day11_exercises` is never used
[INFO] [stdout]  --> src/day11/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day11_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_add` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn safe_add(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_multiply` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn safe_multiply(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_divide` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn safe_divide(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_formula` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:48:4
[INFO] [stdout]    |
[INFO] [stdout] 48 | fn calculate_formula(_a: i32, _b: i32, _c: i32) -> Result<i32, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day11/calculator_chaining.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `DataError` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 | enum DataError {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_raw_data` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn read_raw_data(_id: u32) -> Result<String, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_numbers` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn parse_numbers(_raw: &str) -> Result<Vec<i32>, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_numbers` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn validate_numbers(_numbers: &[i32]) -> Result<(), DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_average` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn calculate_average(_numbers: &[i32]) -> Result<f64, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_data_pipeline` is never used
[INFO] [stdout]   --> src/day11/data_pipeline.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn process_data_pipeline(_id: u32) -> Result<f64, DataError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day11/data_pipeline.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RegistrationError` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:41:6
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum RegistrationError {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_email` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn validate_email(_email: &str) -> Result<(), RegistrationError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_password` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn validate_password(_password: &str) -> Result<(), RegistrationError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_age` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn validate_age(_age: u8) -> Result<(), RegistrationError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `register_user` is never used
[INFO] [stdout]   --> src/day11/user_registration.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn register_user(
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day11/user_registration.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day12_exercises` is never used
[INFO] [stdout]  --> src/day12/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day12_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `get`, `remove`, `len`, and `is_empty` are never used
[INFO] [stdout]   --> src/day12/generic_storage.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl<T> Storage<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 43 |     fn new() -> Storage<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn add(&mut self, _item: T) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn get(&self, _index: usize) -> Option<&T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn remove(&mut self, _index: usize) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     fn is_empty(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display_all` is never used
[INFO] [stdout]   --> src/day12/generic_storage.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl<T: std::fmt::Display> Storage<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 74 |     fn display_all(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day12/generic_storage.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_type_and_value` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn print_type_and_value<T: std::fmt::Debug>(_value: T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_last` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn get_last<T>(_list: &[T]) -> Option<&T> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `swap_pair` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn swap_pair<T>(_pair: (T, T)) -> (T, T) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_index` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn find_index<T: PartialEq>(_list: &[T], _target: &T) -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day12/generic_utilities.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, `unwrap`, and `map` are never used
[INFO] [stdout]   --> src/day12/wrapper_struct.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl<T> Wrapper<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 38 |     fn new(_value: T) -> Wrapper<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn get(&self) -> &T {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     fn unwrap(self) -> T {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn map<U, F>(self, _f: F) -> Wrapper<U>
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/day12/wrapper_struct.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<T: std::fmt::Display> Wrapper<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 62 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day12/wrapper_struct.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day13_exercises` is never used
[INFO] [stdout]  --> src/day13/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day13_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Product` is never constructed
[INFO] [stdout]   --> src/day13/comparable_product.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Product {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_cheapest` is never used
[INFO] [stdout]   --> src/day13/comparable_product.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn find_cheapest<T: Ord>(items: &[T]) -> &T {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_most_expensive` is never used
[INFO] [stdout]   --> src/day13/comparable_product.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn find_most_expensive<T: Ord>(items: &[T]) -> &T {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/comparable_product.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]   --> src/day13/conditional_methods.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Container<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<T> Container<T> {
[INFO] [stdout]    | -------------------- associated function in this implementation
[INFO] [stdout] 35 |     fn new(value: T) -> Container<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `duplicate` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl<T: Clone> Container<T> {
[INFO] [stdout]    | --------------------------- method in this implementation
[INFO] [stdout] 42 |     fn duplicate(&self) -> (T, T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_greater_than` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | impl<T: PartialOrd> Container<T> {
[INFO] [stdout]    | -------------------------------- method in this implementation
[INFO] [stdout] 49 |     fn is_greater_than(&self, other: &T) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | impl<T: Display> Container<T> {
[INFO] [stdout]    | ----------------------------- method in this implementation
[INFO] [stdout] 56 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/conditional_methods.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Logger` is never used
[INFO] [stdout]   --> src/day13/logging_system.rs:29:7
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Logger {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConsoleLogger` is never constructed
[INFO] [stdout]   --> src/day13/logging_system.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | struct ConsoleLogger;
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileLogger` is never constructed
[INFO] [stdout]   --> src/day13/logging_system.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct FileLogger {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `log_multiple` is never used
[INFO] [stdout]   --> src/day13/logging_system.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn log_multiple<T: Logger>(logger: &T, messages: &[&str]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/logging_system.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Shape` is never used
[INFO] [stdout]   --> src/day13/shape_trait.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 28 | trait Shape {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/day13/shape_trait.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]   --> src/day13/shape_trait.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Circle {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_shape_info` is never used
[INFO] [stdout]   --> src/day13/shape_trait.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn print_shape_info<T: Shape>(shape: &T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day13/shape_trait.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day14_exercises` is never used
[INFO] [stdout]  --> src/day14/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn run_day14_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `LibraryError` is never used
[INFO] [stdout]   --> src/day14/library_system.rs:54:6
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum LibraryError {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Displayable` is never used
[INFO] [stdout]   --> src/day14/library_system.rs:61:7
[INFO] [stdout]    |
[INFO] [stdout] 61 | trait Displayable {
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Book` is never constructed
[INFO] [stdout]   --> src/day14/library_system.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Book {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Library` is never constructed
[INFO] [stdout]   --> src/day14/library_system.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | struct Library<T: Displayable + Clone> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_book`, `get_book`, `remove_book`, `list_all_books`, and `count` are never used
[INFO] [stdout]    --> src/day14/library_system.rs:94:8
[INFO] [stdout]     |
[INFO] [stdout]  93 | impl<T: Displayable + Clone> Library<T> {
[INFO] [stdout]     | --------------------------------------- associated items in this implementation
[INFO] [stdout]  94 |     fn new() -> Library<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     fn add_book(&mut self, id: u32, book: T) -> Result<(), LibraryError> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn get_book(&self, id: u32) -> Result<&T, LibraryError> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |     fn remove_book(&mut self, id: u32) -> Result<T, LibraryError> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn list_all_books(&self) -> Vec<String> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     fn count(&self) -> usize {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day14/library_system.rs:128:8
[INFO] [stdout]     |
[INFO] [stdout] 128 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `CURRENT_TIME` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | static mut CURRENT_TIME: u64 = 0;
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_current_time` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn get_current_time() -> u64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `advance_time` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn advance_time(seconds: u64) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CacheError` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 | enum CacheError {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Cacheable` is never used
[INFO] [stdout]   --> src/day14/cache_system.rs:74:7
[INFO] [stdout]    |
[INFO] [stdout] 74 | trait Cacheable {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CachedValue` is never constructed
[INFO] [stdout]   --> src/day14/cache_system.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct CachedValue<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/day14/cache_system.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 93 | struct Cache<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set`, `get`, `remove`, `clear`, and `size` are never used
[INFO] [stdout]    --> src/day14/cache_system.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl<T: Clone> Cache<T> {
[INFO] [stdout]     | ----------------------- associated items in this implementation
[INFO] [stdout] 100 |     fn new() -> Cache<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn set(&mut self, key: String, value: T, ttl: u64) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     fn get(&self, key: &str) -> Result<T, CacheError> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     fn remove(&mut self, key: &str) -> Result<T, CacheError> {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 143 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 147 |     fn size(&self) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day14/cache_system.rs:152:8
[INFO] [stdout]     |
[INFO] [stdout] 152 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day15_exercises` is never used
[INFO] [stdout]  --> src/day15/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day15_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Container` is never used
[INFO] [stdout]   --> src/day15/associated_types_container.rs:24:7
[INFO] [stdout]    |
[INFO] [stdout] 24 | trait Container {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VecContainer` is never constructed
[INFO] [stdout]   --> src/day15/associated_types_container.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct VecContainer {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringContainer` is never constructed
[INFO] [stdout]   --> src/day15/associated_types_container.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct StringContainer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_container` is never used
[INFO] [stdout]   --> src/day15/associated_types_container.rs:75:4
[INFO] [stdout]    |
[INFO] [stdout] 75 | fn print_container(container: &impl Container) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day15/associated_types_container.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/day15/default_type_params.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Point<T = i32> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/day15/default_type_params.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 32 |     fn new(x: T, y: T) -> Point<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `display` is never used
[INFO] [stdout]   --> src/day15/default_type_params.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl<T: std::fmt::Display> Point<T> {
[INFO] [stdout]    | ----------------------------------- method in this implementation
[INFO] [stdout] 51 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day15/default_type_params.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Notification` is never used
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 39 | trait Notification {
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EmailNotification` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct EmailNotification {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SmsNotification` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct SmsNotification {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PushNotification` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | struct PushNotification {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NotificationService` is never constructed
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct NotificationService {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_channel`, and `broadcast` are never used
[INFO] [stdout]   --> src/day15/trait_objects_notification.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | impl NotificationService {
[INFO] [stdout]    | ------------------------ associated items in this implementation
[INFO] [stdout] 84 |     fn new() -> NotificationService {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 90 |     fn add_channel(&mut self, channel: Box<dyn Notification>) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94 |     fn broadcast(&self, message: &str) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day15/trait_objects_notification.rs:101:8
[INFO] [stdout]     |
[INFO] [stdout] 101 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Processor` is never used
[INFO] [stdout]   --> src/day15/combined_processor.rs:34:7
[INFO] [stdout]    |
[INFO] [stdout] 34 | trait Processor {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UppercaseProcessor` is never constructed
[INFO] [stdout]   --> src/day15/combined_processor.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | struct UppercaseProcessor;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LengthProcessor` is never constructed
[INFO] [stdout]   --> src/day15/combined_processor.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct LengthProcessor;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DoubleProcessor` is never constructed
[INFO] [stdout]   --> src/day15/combined_processor.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct DoubleProcessor;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day15/combined_processor.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day16_exercises` is never used
[INFO] [stdout]  --> src/day16/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day16_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Context<'a, 'b> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `title`, `body`, and `display` are never used
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<'a, 'b> Context<'a, 'b> {
[INFO] [stdout]    | ---------------------------- associated items in this implementation
[INFO] [stdout] 35 |     fn new(title: &'a str, body: &'b str) -> Context<'a, 'b> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn title(&self) -> &'a str {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn body(&self) -> &'b str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn display(&self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_summary` is never used
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn create_summary<'a>(ctx: &Context<'a, '_>) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/complex_lifetimes.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn first<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `contains_substring` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn contains_substring<'a>(text: &'a str, pattern: &str) -> Option<&'a str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/lifetime_basics.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TextSlice` is never constructed
[INFO] [stdout]   --> src/day16/lifetime_struct.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct TextSlice<'a> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `text`, `len`, and `concat` are never used
[INFO] [stdout]   --> src/day16/lifetime_struct.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl<'a> TextSlice<'a> {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 36 |     fn new(content: &'a str, start: usize, end: usize) -> TextSlice<'a> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn text(&self) -> &str {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn concat(&self, other: &str) -> String {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/lifetime_struct.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/day16/parser_struct.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Parser<'a> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `current_char`, `advance`, `remaining`, and `is_finished` are never used
[INFO] [stdout]   --> src/day16/parser_struct.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<'a> Parser<'a> {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 39 |     fn new(input: &'a str) -> Parser<'a> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn current_char(&self) -> Option<char> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn advance(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn remaining(&self) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn is_finished(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day16/parser_struct.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day17_exercises` is never used
[INFO] [stdout]  --> src/day17/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day17_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/day17/box_linked_list.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stdout]   --> src/day17/box_linked_list.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl List {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 37 |     fn new() -> List {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     fn prepend(self, value: i32) -> List {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn len(&self) -> usize {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn stringify(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/box_linked_list.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Task` is never constructed
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Task {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TaskManager` is never constructed
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct TaskManager {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_task`, `complete_task`, `list_tasks`, and `completed_count` are never used
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl TaskManager {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 54 |     fn new() -> TaskManager {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn add_task(&mut self, id: u32, description: String) -> Rc<RefCell<Task>> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn complete_task(&self, task: &Rc<RefCell<Task>>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 72 |     fn list_tasks(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn completed_count(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/rc_refcell_shared_mutable.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct Node {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Graph` is never constructed
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct Graph {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_node`, `node_count`, and `total_references` are never used
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | impl Graph {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 47 |     fn new() -> Graph {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     fn add_node(&mut self, value: i32) -> Rc<Node> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn node_count(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn total_references(&self) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/rc_shared_data.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/day17/refcell_interior_mutability.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `increment`, `get`, and `reset` are never used
[INFO] [stdout]   --> src/day17/refcell_interior_mutability.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Counter {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 34 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     fn increment(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn get(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     fn reset(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day17/refcell_interior_mutability.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day18_exercises` is never used
[INFO] [stdout]  --> src/day18/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day18_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_threads` is never used
[INFO] [stdout]   --> src/day18/basic_threads.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn create_threads(count: u32) -> Vec<thread::JoinHandle<u32>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wait_all` is never used
[INFO] [stdout]   --> src/day18/basic_threads.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn wait_all(handles: Vec<thread::JoinHandle<u32>>) -> Vec<u32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/basic_threads.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Task` is never constructed
[INFO] [stdout]   --> src/day18/channel_messaging.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Task {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TaskResult` is never constructed
[INFO] [stdout]   --> src/day18/channel_messaging.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct TaskResult {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_tasks` is never used
[INFO] [stdout]   --> src/day18/channel_messaging.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn process_tasks(tasks: Vec<Task>) -> Vec<TaskResult> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/channel_messaging.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/day18/mutex_counter.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `increment`, `decrement`, and `get` are never used
[INFO] [stdout]   --> src/day18/mutex_counter.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl Counter {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 39 |     fn new() -> Arc<Counter> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn increment(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn decrement(&self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     fn get(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_increments` is never used
[INFO] [stdout]   --> src/day18/mutex_counter.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn parallel_increments(counter: Arc<Counter>, threads: u32, increments_per_thread: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/mutex_counter.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:33:6
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `producer` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn producer(id: u32, tx: mpsc::Sender<Message>, count: u32) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `consumer` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn consumer(rx: mpsc::Receiver<Message>) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_producer_consumer` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn run_producer_consumer(producer_count: u32, messages_per_producer: u32) -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day18/producer_consumer.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day20_exercises` is never used
[INFO] [stdout]  --> src/day20/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day20_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `compute` is never used
[INFO] [stdout]   --> src/day20/tokio_spawn_parallel.rs:20:10
[INFO] [stdout]    |
[INFO] [stdout] 20 | async fn compute(id: u32, duration_ms: u64) -> u32 {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parallel_compute` is never used
[INFO] [stdout]   --> src/day20/tokio_spawn_parallel.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | async fn parallel_compute(tasks: Vec<(u32, u64)>) -> Vec<u32> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/tokio_spawn_parallel.rs:42:14
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProcessError` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum ProcessError {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_with_validation` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 | async fn process_with_validation(value: i32) -> Result<i32, ProcessError> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_with_timeout` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:52:10
[INFO] [stdout]    |
[INFO] [stdout] 52 | async fn process_with_timeout(value: i32, timeout_ms: u64) -> Result<i32, ProcessError> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_batch` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:66:10
[INFO] [stdout]    |
[INFO] [stdout] 66 | async fn process_batch(values: Vec<i32>) -> Vec<Result<i32, ProcessError>> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/async_error_handling.rs:83:14
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ApiResponse` is never constructed
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct ApiResponse {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `HttpClient` is never constructed
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct HttpClient;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, and `post` are never used
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | impl HttpClient {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 47 |     fn new() -> HttpClient {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |     async fn get(&self, url: &str) -> Result<ApiResponse, String> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 63 |     async fn post(&self, url: &str, body: &str) -> Result<ApiResponse, String> {
[INFO] [stdout]    |              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fetch_multiple` is never used
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:79:10
[INFO] [stdout]    |
[INFO] [stdout] 79 | async fn fetch_multiple(urls: Vec<String>) -> Vec<Result<ApiResponse, String>> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/http_client_simulator.rs:98:14
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unreliable_operation` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn unreliable_operation(id: u32, fail_count: &mut u32) -> Result<String, String> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `retry_operation` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 | async fn retry_operation<F, Fut, T, E>(
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_with_retry` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:71:10
[INFO] [stdout]    |
[INFO] [stdout] 71 | async fn process_with_retry(id: u32) -> Result<String, String> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day20/retry_logic.rs:90:14
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub async fn run() {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_balance` is never used
[INFO] [stdout]   --> src/day5/bank_account.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl BankAccount {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 63 |     fn get_balance(&self) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day7_exercises` is never used
[INFO] [stdout]  --> src/day7/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn run_day7_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TodoStatus` is never used
[INFO] [stdout]   --> src/day7/todo_system.rs:77:6
[INFO] [stdout]    |
[INFO] [stdout] 77 | enum TodoStatus {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Todo` is never constructed
[INFO] [stdout]   --> src/day7/todo_system.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 | struct Todo {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `start`, `complete`, `is_completed`, and `status_text` are never used
[INFO] [stdout]    --> src/day7/todo_system.rs:97:8
[INFO] [stdout]     |
[INFO] [stdout]  95 | impl Todo {
[INFO] [stdout]     | --------- associated items in this implementation
[INFO] [stdout]  96 |     // TODO: new 메서드 구현
[INFO] [stdout]  97 |     fn new(id: u32, title: String, description: String) -> Todo {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 107 |     fn start(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |     fn complete(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     fn is_completed(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     fn status_text(&self) -> &str {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TodoList` is never constructed
[INFO] [stdout]    --> src/day7/todo_system.rs:136:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | struct TodoList {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/day7/todo_system.rs:145:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | impl TodoList {
[INFO] [stdout]     | ------------- associated items in this implementation
[INFO] [stdout] 144 |     // TODO: new 메서드 구현
[INFO] [stdout] 145 |     fn new() -> TodoList {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 152 |     fn add(&mut self, title: String, description: String) -> u32 {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 160 |     fn get(&self, id: u32) -> Option<&Todo> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 165 |     fn get_mut(&mut self, id: u32) -> Option<&mut Todo> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 169 |     fn remove(&mut self, id: u32) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn list_all(&self) -> &Vec<Todo> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 183 |     fn list_by_status(&self, status: TodoStatus) -> Vec<&Todo> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 191 |     fn count_by_status(&self, status: TodoStatus) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]    --> src/day7/todo_system.rs:199:8
[INFO] [stdout]     |
[INFO] [stdout] 199 | pub fn run() {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day8_exercises` is never used
[INFO] [stdout]  --> src/day8/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day8_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |         pub fn add(a: f64, b: f64) -> f64 {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `subtract` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |         pub fn subtract(a: f64, b: f64) -> f64 {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `multiply` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |         pub fn multiply(a: f64, b: f64) -> f64 {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `divide` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:35:16
[INFO] [stdout]    |
[INFO] [stdout] 35 |         pub fn divide(a: f64, b: f64) -> Option<f64> {
[INFO] [stdout]    |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `power` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:44:16
[INFO] [stdout]    |
[INFO] [stdout] 44 |         pub fn power(base: f64, exponent: f64) -> f64 {
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `square_root` is never used
[INFO] [stdout]   --> src/day8/calculator_module.rs:48:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |         pub fn square_root(x: f64) -> Option<f64> {
[INFO] [stdout]    |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day8/config_management.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AppConfig` is never constructed
[INFO] [stdout]   --> src/day8/config_management.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub struct AppConfig {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_app_name`, and `enable_debug` are never used
[INFO] [stdout]   --> src/day8/config_management.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 36 |     impl AppConfig {
[INFO] [stdout]    |     -------------- associated items in this implementation
[INFO] [stdout] 37 |         pub fn new(app_name: String, version: String) -> AppConfig {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |         pub fn get_app_name(&self) -> &str {
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |         pub fn enable_debug(&mut self) {
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day8/library_system.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Book` is never constructed
[INFO] [stdout]   --> src/day8/library_system.rs:24:20
[INFO] [stdout]    |
[INFO] [stdout] 24 |         pub struct Book {
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_book` is never used
[INFO] [stdout]   --> src/day8/library_system.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 |         pub fn create_book(title: String, author: String) -> Book {
[INFO] [stdout]    |                ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Member` is never constructed
[INFO] [stdout]   --> src/day8/library_system.rs:37:20
[INFO] [stdout]    |
[INFO] [stdout] 37 |         pub struct Member {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_member` is never used
[INFO] [stdout]   --> src/day8/library_system.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |         pub fn create_member(name: String, id: u32) -> Member {
[INFO] [stdout]    |                ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_day9_exercises` is never used
[INFO] [stdout]  --> src/day9/mod.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn run_day9_exercises() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PhoneBook` is never constructed
[INFO] [stdout]   --> src/day9/phone_book.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct PhoneBook {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add`, `get`, `remove`, and `list_all` are never used
[INFO] [stdout]   --> src/day9/phone_book.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl PhoneBook {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 39 |     // TODO: new 메서드를 구현하세요
[INFO] [stdout] 40 |     fn new() -> PhoneBook {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn add(&mut self, _name: String, _phone: String) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn get(&self, _name: &str) -> Option<&String> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     fn remove(&mut self, _name: &str) -> bool {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn list_all(&self) -> Vec<(&String, &String)> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day9/phone_book.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_average` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn calculate_average(_scores: &Vec<i32>) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_highest` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn find_highest(_scores: &Vec<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_lowest` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn find_lowest(_scores: &Vec<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `filter_passing` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn filter_passing(_scores: &Vec<i32>, _passing_score: i32) -> Vec<i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day9/student_grades.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_words` is never used
[INFO] [stdout]   --> src/day9/word_frequency.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn count_words(_text: &str) -> HashMap<String, usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_most_frequent` is never used
[INFO] [stdout]   --> src/day9/word_frequency.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn find_most_frequent(_word_counts: &HashMap<String, usize>) -> Option<(String, usize)> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/day9/word_frequency.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn run() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.80s
[INFO] running `Command { std: "docker" "inspect" "74114cf8de697d1ced1bae67548c1f8c05278bd8c74777735bc83e3d86bb2fca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74114cf8de697d1ced1bae67548c1f8c05278bd8c74777735bc83e3d86bb2fca", kill_on_drop: false }`
[INFO] [stdout] 74114cf8de697d1ced1bae67548c1f8c05278bd8c74777735bc83e3d86bb2fca
[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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bd7d74411512a3dd3b35d2f699c51dd2557c7e7e" "test" "--frozen" "-Zbuild-dir-new-layout", kill_on_drop: false }`
[INFO] [stdout] 3fdd25b317bd108249778a2e1bbea451591d30d823f79c4d1053679956e4814d
[INFO] running `Command { std: "docker" "start" "-a" "3fdd25b317bd108249778a2e1bbea451591d30d823f79c4d1053679956e4814d", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `thread::sleep`
[INFO] [stderr]   --> src/day15/default_type_params.rs:22:21
[INFO] [stderr]    |
[INFO] [stderr] 22 | use std::{ops::Add, thread::sleep};
[INFO] [stderr]    |                     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Not`
[INFO] [stderr]   --> src/day15/trait_objects_notification.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | use std::ops::Not;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread::sleep`
[INFO] [stderr]   --> src/day16/parser_struct.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 | use std::thread::sleep;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]   --> src/day18/basic_threads.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | use std::time::Duration;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Thread`
[INFO] [stderr]   --> src/day18/mutex_counter.rs:29:25
[INFO] [stderr]    |
[INFO] [stderr] 29 | use std::thread::{self, Thread};
[INFO] [stderr]    |                         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::format`
[INFO] [stderr]   --> src/day18/producer_consumer.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | use std::fmt::format;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::future::Pending`
[INFO] [stderr]   --> src/day7/todo_system.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 | use std::future::Pending;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/day16/lifetime_basics.rs:25:26
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn first<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stderr]    |                          ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]   --> src/day20/retry_logic.rs:32:31
[INFO] [stderr]    |
[INFO] [stderr] 32 | async fn unreliable_operation(id: u32, fail_count: &mut u32) -> Result<String, String> {
[INFO] [stderr]    |                               ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]   --> src/day6/vehicle.rs:38:22
[INFO] [stderr]    |
[INFO] [stderr] 38 |         Vehicle::Car(str) => 30,
[INFO] [stderr]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `line`
[INFO] [stderr]   --> src/day6/vehicle.rs:40:26
[INFO] [stderr]    |
[INFO] [stderr] 40 |         Vehicle::Train { line, station } => 20,
[INFO] [stderr]    |                          ^^^^ help: try ignoring the field: `line: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `station`
[INFO] [stderr]   --> src/day6/vehicle.rs:40:32
[INFO] [stderr]    |
[INFO] [stderr] 40 |         Vehicle::Train { line, station } => 20,
[INFO] [stderr]    |                                ^^^^^^^ help: try ignoring the field: `station: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]   --> src/day6/vehicle.rs:48:22
[INFO] [stderr]    |
[INFO] [stderr] 48 |         Vehicle::Car(str) => format!("차종으로 이동"),
[INFO] [stderr]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day10_exercises` is never used
[INFO] [stderr]  --> src/day10/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day10_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `FileError` is never used
[INFO] [stderr]   --> src/day10/file_simulator.rs:30:6
[INFO] [stderr]    |
[INFO] [stderr] 30 | enum FileError {
[INFO] [stderr]    |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_file` is never used
[INFO] [stderr]   --> src/day10/file_simulator.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn read_file(_filename: &str) -> Result<String, FileError> {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `parse_csv` is never used
[INFO] [stderr]   --> src/day10/file_simulator.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn parse_csv(_content: &str) -> Result<Vec<i32>, FileError> {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_and_parse` is never used
[INFO] [stderr]   --> src/day10/file_simulator.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn read_and_parse(_filename: &str) -> Result<Vec<i32>, FileError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day10/file_simulator.rs:64:8
[INFO] [stderr]    |
[INFO] [stderr] 64 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `safe_divide_result` is never used
[INFO] [stderr]   --> src/day10/safe_division.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn safe_divide_result(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `safe_divide_option` is never used
[INFO] [stderr]   --> src/day10/safe_division.rs:24:4
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn safe_divide_option(_a: i32, _b: i32) -> Option<i32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day10/safe_division.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Student` is never constructed
[INFO] [stderr]   --> src/day10/student_registry.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | struct Student {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `StudentRegistry` is never constructed
[INFO] [stderr]   --> src/day10/student_registry.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | struct StudentRegistry {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add_student`, `find_by_name`, and `get_grade` are never used
[INFO] [stderr]   --> src/day10/student_registry.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl StudentRegistry {
[INFO] [stderr]    | -------------------- associated items in this implementation
[INFO] [stderr] 45 |     // TODO: new 메서드를 구현하세요
[INFO] [stderr] 46 |     fn new() -> StudentRegistry {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 53 |     fn add_student(&mut self, _student: Student) {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 58 |     fn find_by_name(&self, _name: &str) -> Option<&Student> {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 63 |     fn get_grade(&self, _name: &str) -> Option<char> {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day10/student_registry.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day11_exercises` is never used
[INFO] [stderr]  --> src/day11/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day11_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `safe_add` is never used
[INFO] [stderr]   --> src/day11/calculator_chaining.rs:27:4
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn safe_add(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `safe_multiply` is never used
[INFO] [stderr]   --> src/day11/calculator_chaining.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn safe_multiply(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `safe_divide` is never used
[INFO] [stderr]   --> src/day11/calculator_chaining.rs:39:4
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn safe_divide(_a: i32, _b: i32) -> Result<i32, String> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `calculate_formula` is never used
[INFO] [stderr]   --> src/day11/calculator_chaining.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn calculate_formula(_a: i32, _b: i32, _c: i32) -> Result<i32, String> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day11/calculator_chaining.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `DataError` is never used
[INFO] [stderr]   --> src/day11/data_pipeline.rs:38:6
[INFO] [stderr]    |
[INFO] [stderr] 38 | enum DataError {
[INFO] [stderr]    |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_raw_data` is never used
[INFO] [stderr]   --> src/day11/data_pipeline.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn read_raw_data(_id: u32) -> Result<String, DataError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `parse_numbers` is never used
[INFO] [stderr]   --> src/day11/data_pipeline.rs:67:4
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn parse_numbers(_raw: &str) -> Result<Vec<i32>, DataError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `validate_numbers` is never used
[INFO] [stderr]   --> src/day11/data_pipeline.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn validate_numbers(_numbers: &[i32]) -> Result<(), DataError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `calculate_average` is never used
[INFO] [stderr]   --> src/day11/data_pipeline.rs:85:4
[INFO] [stderr]    |
[INFO] [stderr] 85 | fn calculate_average(_numbers: &[i32]) -> Result<f64, DataError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `process_data_pipeline` is never used
[INFO] [stderr]   --> src/day11/data_pipeline.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 | fn process_data_pipeline(_id: u32) -> Result<f64, DataError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]    --> src/day11/data_pipeline.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 | pub fn run() {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `RegistrationError` is never used
[INFO] [stderr]   --> src/day11/user_registration.rs:41:6
[INFO] [stderr]    |
[INFO] [stderr] 41 | enum RegistrationError {
[INFO] [stderr]    |      ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `validate_email` is never used
[INFO] [stderr]   --> src/day11/user_registration.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn validate_email(_email: &str) -> Result<(), RegistrationError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `validate_password` is never used
[INFO] [stderr]   --> src/day11/user_registration.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn validate_password(_password: &str) -> Result<(), RegistrationError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `validate_age` is never used
[INFO] [stderr]   --> src/day11/user_registration.rs:74:4
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn validate_age(_age: u8) -> Result<(), RegistrationError> {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `register_user` is never used
[INFO] [stderr]   --> src/day11/user_registration.rs:87:4
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn register_user(
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]    --> src/day11/user_registration.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 | pub fn run() {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day12_exercises` is never used
[INFO] [stderr]  --> src/day12/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day12_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add`, `get`, `remove`, `len`, and `is_empty` are never used
[INFO] [stderr]   --> src/day12/generic_storage.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | impl<T> Storage<T> {
[INFO] [stderr]    | ------------------ associated items in this implementation
[INFO] [stderr] 43 |     fn new() -> Storage<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 47 |     fn add(&mut self, _item: T) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 51 |     fn get(&self, _index: usize) -> Option<&T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 55 |     fn remove(&mut self, _index: usize) -> Option<T> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 63 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 67 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `display_all` is never used
[INFO] [stderr]   --> src/day12/generic_storage.rs:74:8
[INFO] [stderr]    |
[INFO] [stderr] 73 | impl<T: std::fmt::Display> Storage<T> {
[INFO] [stderr]    | ------------------------------------- method in this implementation
[INFO] [stderr] 74 |     fn display_all(&self) {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day12/generic_storage.rs:81:8
[INFO] [stderr]    |
[INFO] [stderr] 81 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_type_and_value` is never used
[INFO] [stderr]   --> src/day12/generic_utilities.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn print_type_and_value<T: std::fmt::Debug>(_value: T) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_last` is never used
[INFO] [stderr]   --> src/day12/generic_utilities.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn get_last<T>(_list: &[T]) -> Option<&T> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `swap_pair` is never used
[INFO] [stderr]   --> src/day12/generic_utilities.rs:37:4
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn swap_pair<T>(_pair: (T, T)) -> (T, T) {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_index` is never used
[INFO] [stderr]   --> src/day12/generic_utilities.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn find_index<T: PartialEq>(_list: &[T], _target: &T) -> Option<usize> {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day12/generic_utilities.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `get`, `unwrap`, and `map` are never used
[INFO] [stderr]   --> src/day12/wrapper_struct.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | impl<T> Wrapper<T> {
[INFO] [stderr]    | ------------------ associated items in this implementation
[INFO] [stderr] 38 |     fn new(_value: T) -> Wrapper<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 42 |     fn get(&self) -> &T {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 46 |     fn unwrap(self) -> T {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 50 |     fn map<U, F>(self, _f: F) -> Wrapper<U>
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `display` is never used
[INFO] [stderr]   --> src/day12/wrapper_struct.rs:62:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | impl<T: std::fmt::Display> Wrapper<T> {
[INFO] [stderr]    | ------------------------------------- method in this implementation
[INFO] [stderr] 62 |     fn display(&self) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day12/wrapper_struct.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day13_exercises` is never used
[INFO] [stderr]  --> src/day13/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day13_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Product` is never constructed
[INFO] [stderr]   --> src/day13/comparable_product.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | struct Product {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_cheapest` is never used
[INFO] [stderr]   --> src/day13/comparable_product.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn find_cheapest<T: Ord>(items: &[T]) -> &T {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_most_expensive` is never used
[INFO] [stderr]   --> src/day13/comparable_product.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn find_most_expensive<T: Ord>(items: &[T]) -> &T {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day13/comparable_product.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Container` is never constructed
[INFO] [stderr]   --> src/day13/conditional_methods.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Container<T> {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/day13/conditional_methods.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | impl<T> Container<T> {
[INFO] [stderr]    | -------------------- associated function in this implementation
[INFO] [stderr] 35 |     fn new(value: T) -> Container<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `duplicate` is never used
[INFO] [stderr]   --> src/day13/conditional_methods.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | impl<T: Clone> Container<T> {
[INFO] [stderr]    | --------------------------- method in this implementation
[INFO] [stderr] 42 |     fn duplicate(&self) -> (T, T) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `is_greater_than` is never used
[INFO] [stderr]   --> src/day13/conditional_methods.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | impl<T: PartialOrd> Container<T> {
[INFO] [stderr]    | -------------------------------- method in this implementation
[INFO] [stderr] 49 |     fn is_greater_than(&self, other: &T) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `display` is never used
[INFO] [stderr]   --> src/day13/conditional_methods.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | impl<T: Display> Container<T> {
[INFO] [stderr]    | ----------------------------- method in this implementation
[INFO] [stderr] 56 |     fn display(&self) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day13/conditional_methods.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Logger` is never used
[INFO] [stderr]   --> src/day13/logging_system.rs:29:7
[INFO] [stderr]    |
[INFO] [stderr] 29 | trait Logger {
[INFO] [stderr]    |       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ConsoleLogger` is never constructed
[INFO] [stderr]   --> src/day13/logging_system.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 40 | struct ConsoleLogger;
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `FileLogger` is never constructed
[INFO] [stderr]   --> src/day13/logging_system.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct FileLogger {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `log_multiple` is never used
[INFO] [stderr]   --> src/day13/logging_system.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn log_multiple<T: Logger>(logger: &T, messages: &[&str]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day13/logging_system.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Shape` is never used
[INFO] [stderr]   --> src/day13/shape_trait.rs:28:7
[INFO] [stderr]    |
[INFO] [stderr] 28 | trait Shape {
[INFO] [stderr]    |       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]   --> src/day13/shape_trait.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct Rectangle {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Circle` is never constructed
[INFO] [stderr]   --> src/day13/shape_trait.rs:50:8
[INFO] [stderr]    |
[INFO] [stderr] 50 | struct Circle {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_shape_info` is never used
[INFO] [stderr]   --> src/day13/shape_trait.rs:65:4
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn print_shape_info<T: Shape>(shape: &T) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day13/shape_trait.rs:70:8
[INFO] [stderr]    |
[INFO] [stderr] 70 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day14_exercises` is never used
[INFO] [stderr]  --> src/day14/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run_day14_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `LibraryError` is never used
[INFO] [stderr]   --> src/day14/library_system.rs:54:6
[INFO] [stderr]    |
[INFO] [stderr] 54 | enum LibraryError {
[INFO] [stderr]    |      ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Displayable` is never used
[INFO] [stderr]   --> src/day14/library_system.rs:61:7
[INFO] [stderr]    |
[INFO] [stderr] 61 | trait Displayable {
[INFO] [stderr]    |       ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Book` is never constructed
[INFO] [stderr]   --> src/day14/library_system.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 | struct Book {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Library` is never constructed
[INFO] [stderr]   --> src/day14/library_system.rs:88:8
[INFO] [stderr]    |
[INFO] [stderr] 88 | struct Library<T: Displayable + Clone> {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add_book`, `get_book`, `remove_book`, `list_all_books`, and `count` are never used
[INFO] [stderr]    --> src/day14/library_system.rs:94:8
[INFO] [stderr]     |
[INFO] [stderr]  93 | impl<T: Displayable + Clone> Library<T> {
[INFO] [stderr]     | --------------------------------------- associated items in this implementation
[INFO] [stderr]  94 |     fn new() -> Library<T> {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 100 |     fn add_book(&mut self, id: u32, book: T) -> Result<(), LibraryError> {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 108 |     fn get_book(&self, id: u32) -> Result<&T, LibraryError> {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 112 |     fn remove_book(&mut self, id: u32) -> Result<T, LibraryError> {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 116 |     fn list_all_books(&self) -> Vec<String> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 123 |     fn count(&self) -> usize {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]    --> src/day14/library_system.rs:128:8
[INFO] [stderr]     |
[INFO] [stderr] 128 | pub fn run() {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static `CURRENT_TIME` is never used
[INFO] [stderr]   --> src/day14/cache_system.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 | static mut CURRENT_TIME: u64 = 0;
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_current_time` is never used
[INFO] [stderr]   --> src/day14/cache_system.rs:56:4
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn get_current_time() -> u64 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `advance_time` is never used
[INFO] [stderr]   --> src/day14/cache_system.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn advance_time(seconds: u64) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `CacheError` is never used
[INFO] [stderr]   --> src/day14/cache_system.rs:68:6
[INFO] [stderr]    |
[INFO] [stderr] 68 | enum CacheError {
[INFO] [stderr]    |      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Cacheable` is never used
[INFO] [stderr]   --> src/day14/cache_system.rs:74:7
[INFO] [stderr]    |
[INFO] [stderr] 74 | trait Cacheable {
[INFO] [stderr]    |       ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `CachedValue` is never constructed
[INFO] [stderr]   --> src/day14/cache_system.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 | struct CachedValue<T> {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Cache` is never constructed
[INFO] [stderr]   --> src/day14/cache_system.rs:93:8
[INFO] [stderr]    |
[INFO] [stderr] 93 | struct Cache<T> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `set`, `get`, `remove`, `clear`, and `size` are never used
[INFO] [stderr]    --> src/day14/cache_system.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr]  99 | impl<T: Clone> Cache<T> {
[INFO] [stderr]     | ----------------------- associated items in this implementation
[INFO] [stderr] 100 |     fn new() -> Cache<T> {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 106 |     fn set(&mut self, key: String, value: T, ttl: u64) {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 117 |     fn get(&self, key: &str) -> Result<T, CacheError> {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 130 |     fn remove(&mut self, key: &str) -> Result<T, CacheError> {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 143 |     fn clear(&mut self) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 147 |     fn size(&self) -> usize {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]    --> src/day14/cache_system.rs:152:8
[INFO] [stderr]     |
[INFO] [stderr] 152 | pub fn run() {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day15_exercises` is never used
[INFO] [stderr]  --> src/day15/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day15_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Container` is never used
[INFO] [stderr]   --> src/day15/associated_types_container.rs:24:7
[INFO] [stderr]    |
[INFO] [stderr] 24 | trait Container {
[INFO] [stderr]    |       ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `VecContainer` is never constructed
[INFO] [stderr]   --> src/day15/associated_types_container.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | struct VecContainer {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `StringContainer` is never constructed
[INFO] [stderr]   --> src/day15/associated_types_container.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | struct StringContainer {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_container` is never used
[INFO] [stderr]   --> src/day15/associated_types_container.rs:75:4
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn print_container(container: &impl Container) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day15/associated_types_container.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]   --> src/day15/default_type_params.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct Point<T = i32> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/day15/default_type_params.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl<T> Point<T> {
[INFO] [stderr]    | ---------------- associated function in this implementation
[INFO] [stderr] 32 |     fn new(x: T, y: T) -> Point<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `display` is never used
[INFO] [stderr]   --> src/day15/default_type_params.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 50 | impl<T: std::fmt::Display> Point<T> {
[INFO] [stderr]    | ----------------------------------- method in this implementation
[INFO] [stderr] 51 |     fn display(&self) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day15/default_type_params.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Notification` is never used
[INFO] [stderr]   --> src/day15/trait_objects_notification.rs:39:7
[INFO] [stderr]    |
[INFO] [stderr] 39 | trait Notification {
[INFO] [stderr]    |       ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `EmailNotification` is never constructed
[INFO] [stderr]   --> src/day15/trait_objects_notification.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | struct EmailNotification {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `SmsNotification` is never constructed
[INFO] [stderr]   --> src/day15/trait_objects_notification.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | struct SmsNotification {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `PushNotification` is never constructed
[INFO] [stderr]   --> src/day15/trait_objects_notification.rs:66:8
[INFO] [stderr]    |
[INFO] [stderr] 66 | struct PushNotification {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `NotificationService` is never constructed
[INFO] [stderr]   --> src/day15/trait_objects_notification.rs:78:8
[INFO] [stderr]    |
[INFO] [stderr] 78 | struct NotificationService {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add_channel`, and `broadcast` are never used
[INFO] [stderr]   --> src/day15/trait_objects_notification.rs:84:8
[INFO] [stderr]    |
[INFO] [stderr] 83 | impl NotificationService {
[INFO] [stderr]    | ------------------------ associated items in this implementation
[INFO] [stderr] 84 |     fn new() -> NotificationService {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 90 |     fn add_channel(&mut self, channel: Box<dyn Notification>) {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 94 |     fn broadcast(&self, message: &str) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]    --> src/day15/trait_objects_notification.rs:101:8
[INFO] [stderr]     |
[INFO] [stderr] 101 | pub fn run() {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Processor` is never used
[INFO] [stderr]   --> src/day15/combined_processor.rs:34:7
[INFO] [stderr]    |
[INFO] [stderr] 34 | trait Processor {
[INFO] [stderr]    |       ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `UppercaseProcessor` is never constructed
[INFO] [stderr]   --> src/day15/combined_processor.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | struct UppercaseProcessor;
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `LengthProcessor` is never constructed
[INFO] [stderr]   --> src/day15/combined_processor.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | struct LengthProcessor;
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `DoubleProcessor` is never constructed
[INFO] [stderr]   --> src/day15/combined_processor.rs:68:8
[INFO] [stderr]    |
[INFO] [stderr] 68 | struct DoubleProcessor;
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day15/combined_processor.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day16_exercises` is never used
[INFO] [stderr]  --> src/day16/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day16_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Context` is never constructed
[INFO] [stderr]   --> src/day16/complex_lifetimes.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 28 | struct Context<'a, 'b> {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `title`, `body`, and `display` are never used
[INFO] [stderr]   --> src/day16/complex_lifetimes.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | impl<'a, 'b> Context<'a, 'b> {
[INFO] [stderr]    | ---------------------------- associated items in this implementation
[INFO] [stderr] 35 |     fn new(title: &'a str, body: &'b str) -> Context<'a, 'b> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 |     fn title(&self) -> &'a str {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 43 |     fn body(&self) -> &'b str {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 47 |     fn display(&self) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `create_summary` is never used
[INFO] [stderr]   --> src/day16/complex_lifetimes.rs:53:4
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn create_summary<'a>(ctx: &Context<'a, '_>) -> &'a str {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day16/complex_lifetimes.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest` is never used
[INFO] [stderr]   --> src/day16/lifetime_basics.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first` is never used
[INFO] [stderr]   --> src/day16/lifetime_basics.rs:25:4
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn first<'a>(x: &'a str, y: &str) -> &'a str {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `contains_substring` is never used
[INFO] [stderr]   --> src/day16/lifetime_basics.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn contains_substring<'a>(text: &'a str, pattern: &str) -> Option<&'a str> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day16/lifetime_basics.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TextSlice` is never constructed
[INFO] [stderr]   --> src/day16/lifetime_struct.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 28 | struct TextSlice<'a> {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `text`, `len`, and `concat` are never used
[INFO] [stderr]   --> src/day16/lifetime_struct.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl<'a> TextSlice<'a> {
[INFO] [stderr]    | ---------------------- associated items in this implementation
[INFO] [stderr] 36 |     fn new(content: &'a str, start: usize, end: usize) -> TextSlice<'a> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 44 |     fn text(&self) -> &str {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 48 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 52 |     fn concat(&self, other: &str) -> String {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day16/lifetime_struct.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Parser` is never constructed
[INFO] [stderr]   --> src/day16/parser_struct.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | struct Parser<'a> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `current_char`, `advance`, `remaining`, and `is_finished` are never used
[INFO] [stderr]   --> src/day16/parser_struct.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | impl<'a> Parser<'a> {
[INFO] [stderr]    | ------------------- associated items in this implementation
[INFO] [stderr] 39 |     fn new(input: &'a str) -> Parser<'a> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 43 |     fn current_char(&self) -> Option<char> {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 47 |     fn advance(&mut self) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 51 |     fn remaining(&self) -> &str {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 55 |     fn is_finished(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day16/parser_struct.rs:60:8
[INFO] [stderr]    |
[INFO] [stderr] 60 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day17_exercises` is never used
[INFO] [stderr]  --> src/day17/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day17_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List` is never used
[INFO] [stderr]   --> src/day17/box_linked_list.rs:30:6
[INFO] [stderr]    |
[INFO] [stderr] 30 | enum List {
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `prepend`, `len`, and `stringify` are never used
[INFO] [stderr]   --> src/day17/box_linked_list.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | impl List {
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 37 |     fn new() -> List {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 41 |     fn prepend(self, value: i32) -> List {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 45 |     fn len(&self) -> usize {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 52 |     fn stringify(&self) -> String {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day17/box_linked_list.rs:62:8
[INFO] [stderr]    |
[INFO] [stderr] 62 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Task` is never constructed
[INFO] [stderr]   --> src/day17/rc_refcell_shared_mutable.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | struct Task {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TaskManager` is never constructed
[INFO] [stderr]   --> src/day17/rc_refcell_shared_mutable.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct TaskManager {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add_task`, `complete_task`, `list_tasks`, and `completed_count` are never used
[INFO] [stderr]   --> src/day17/rc_refcell_shared_mutable.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | impl TaskManager {
[INFO] [stderr]    | ---------------- associated items in this implementation
[INFO] [stderr] 54 |     fn new() -> TaskManager {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 58 |     fn add_task(&mut self, id: u32, description: String) -> Rc<RefCell<Task>> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 68 |     fn complete_task(&self, task: &Rc<RefCell<Task>>) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 72 |     fn list_tasks(&self) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 80 |     fn completed_count(&self) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day17/rc_refcell_shared_mutable.rs:88:8
[INFO] [stderr]    |
[INFO] [stderr] 88 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]   --> src/day17/rc_shared_data.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | struct Node {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Graph` is never constructed
[INFO] [stderr]   --> src/day17/rc_shared_data.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | struct Graph {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add_node`, `node_count`, and `total_references` are never used
[INFO] [stderr]   --> src/day17/rc_shared_data.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | impl Graph {
[INFO] [stderr]    | ---------- associated items in this implementation
[INFO] [stderr] 47 |     fn new() -> Graph {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 51 |     fn add_node(&mut self, value: i32) -> Rc<Node> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 57 |     fn node_count(&self) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 61 |     fn total_references(&self) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day17/rc_shared_data.rs:66:8
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Counter` is never constructed
[INFO] [stderr]   --> src/day17/refcell_interior_mutability.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 28 | struct Counter {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `increment`, `get`, and `reset` are never used
[INFO] [stderr]   --> src/day17/refcell_interior_mutability.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl Counter {
[INFO] [stderr]    | ------------ associated items in this implementation
[INFO] [stderr] 34 |     fn new() -> Counter {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 40 |     fn increment(&self) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 45 |     fn get(&self) -> i32 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |     fn reset(&self) {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day17/refcell_interior_mutability.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day18_exercises` is never used
[INFO] [stderr]  --> src/day18/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day18_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `create_threads` is never used
[INFO] [stderr]   --> src/day18/basic_threads.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn create_threads(count: u32) -> Vec<thread::JoinHandle<u32>> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `wait_all` is never used
[INFO] [stderr]   --> src/day18/basic_threads.rs:31:4
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn wait_all(handles: Vec<thread::JoinHandle<u32>>) -> Vec<u32> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day18/basic_threads.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Task` is never constructed
[INFO] [stderr]   --> src/day18/channel_messaging.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Task {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TaskResult` is never constructed
[INFO] [stderr]   --> src/day18/channel_messaging.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | struct TaskResult {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `process_tasks` is never used
[INFO] [stderr]   --> src/day18/channel_messaging.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn process_tasks(tasks: Vec<Task>) -> Vec<TaskResult> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day18/channel_messaging.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Counter` is never constructed
[INFO] [stderr]   --> src/day18/mutex_counter.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | struct Counter {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `increment`, `decrement`, and `get` are never used
[INFO] [stderr]   --> src/day18/mutex_counter.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | impl Counter {
[INFO] [stderr]    | ------------ associated items in this implementation
[INFO] [stderr] 39 |     fn new() -> Arc<Counter> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 45 |     fn increment(&self) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 50 |     fn decrement(&self) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 55 |     fn get(&self) -> i32 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `parallel_increments` is never used
[INFO] [stderr]   --> src/day18/mutex_counter.rs:61:4
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn parallel_increments(counter: Arc<Counter>, threads: u32, increments_per_thread: u32) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day18/mutex_counter.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Message` is never used
[INFO] [stderr]   --> src/day18/producer_consumer.rs:33:6
[INFO] [stderr]    |
[INFO] [stderr] 33 | enum Message {
[INFO] [stderr]    |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `producer` is never used
[INFO] [stderr]   --> src/day18/producer_consumer.rs:39:4
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn producer(id: u32, tx: mpsc::Sender<Message>, count: u32) {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `consumer` is never used
[INFO] [stderr]   --> src/day18/producer_consumer.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn consumer(rx: mpsc::Receiver<Message>) -> Vec<String> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_producer_consumer` is never used
[INFO] [stderr]   --> src/day18/producer_consumer.rs:61:4
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn run_producer_consumer(producer_count: u32, messages_per_producer: u32) -> Vec<String> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day18/producer_consumer.rs:85:8
[INFO] [stderr]    |
[INFO] [stderr] 85 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day20_exercises` is never used
[INFO] [stderr]  --> src/day20/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day20_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `compute` is never used
[INFO] [stderr]   --> src/day20/tokio_spawn_parallel.rs:20:10
[INFO] [stderr]    |
[INFO] [stderr] 20 | async fn compute(id: u32, duration_ms: u64) -> u32 {
[INFO] [stderr]    |          ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `parallel_compute` is never used
[INFO] [stderr]   --> src/day20/tokio_spawn_parallel.rs:26:10
[INFO] [stderr]    |
[INFO] [stderr] 26 | async fn parallel_compute(tasks: Vec<(u32, u64)>) -> Vec<u32> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day20/tokio_spawn_parallel.rs:42:14
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub async fn run() {
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `ProcessError` is never used
[INFO] [stderr]   --> src/day20/async_error_handling.rs:30:6
[INFO] [stderr]    |
[INFO] [stderr] 30 | enum ProcessError {
[INFO] [stderr]    |      ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `process_with_validation` is never used
[INFO] [stderr]   --> src/day20/async_error_handling.rs:37:10
[INFO] [stderr]    |
[INFO] [stderr] 37 | async fn process_with_validation(value: i32) -> Result<i32, ProcessError> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `process_with_timeout` is never used
[INFO] [stderr]   --> src/day20/async_error_handling.rs:52:10
[INFO] [stderr]    |
[INFO] [stderr] 52 | async fn process_with_timeout(value: i32, timeout_ms: u64) -> Result<i32, ProcessError> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `process_batch` is never used
[INFO] [stderr]   --> src/day20/async_error_handling.rs:66:10
[INFO] [stderr]    |
[INFO] [stderr] 66 | async fn process_batch(values: Vec<i32>) -> Vec<Result<i32, ProcessError>> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day20/async_error_handling.rs:83:14
[INFO] [stderr]    |
[INFO] [stderr] 83 | pub async fn run() {
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ApiResponse` is never constructed
[INFO] [stderr]   --> src/day20/http_client_simulator.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | struct ApiResponse {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `HttpClient` is never constructed
[INFO] [stderr]   --> src/day20/http_client_simulator.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 | struct HttpClient;
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `get`, and `post` are never used
[INFO] [stderr]   --> src/day20/http_client_simulator.rs:47:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | impl HttpClient {
[INFO] [stderr]    | --------------- associated items in this implementation
[INFO] [stderr] 47 |     fn new() -> HttpClient {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 51 |     async fn get(&self, url: &str) -> Result<ApiResponse, String> {
[INFO] [stderr]    |              ^^^
[INFO] [stderr] ...
[INFO] [stderr] 63 |     async fn post(&self, url: &str, body: &str) -> Result<ApiResponse, String> {
[INFO] [stderr]    |              ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `fetch_multiple` is never used
[INFO] [stderr]   --> src/day20/http_client_simulator.rs:79:10
[INFO] [stderr]    |
[INFO] [stderr] 79 | async fn fetch_multiple(urls: Vec<String>) -> Vec<Result<ApiResponse, String>> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day20/http_client_simulator.rs:98:14
[INFO] [stderr]    |
[INFO] [stderr] 98 | pub async fn run() {
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `unreliable_operation` is never used
[INFO] [stderr]   --> src/day20/retry_logic.rs:32:10
[INFO] [stderr]    |
[INFO] [stderr] 32 | async fn unreliable_operation(id: u32, fail_count: &mut u32) -> Result<String, String> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `retry_operation` is never used
[INFO] [stderr]   --> src/day20/retry_logic.rs:45:10
[INFO] [stderr]    |
[INFO] [stderr] 45 | async fn retry_operation<F, Fut, T, E>(
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `process_with_retry` is never used
[INFO] [stderr]   --> src/day20/retry_logic.rs:71:10
[INFO] [stderr]    |
[INFO] [stderr] 71 | async fn process_with_retry(id: u32) -> Result<String, String> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day20/retry_logic.rs:90:14
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub async fn run() {
[INFO] [stderr]    |              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_balance` is never used
[INFO] [stderr]   --> src/day5/bank_account.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | impl BankAccount {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 63 |     fn get_balance(&self) -> f64 {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day7_exercises` is never used
[INFO] [stderr]  --> src/day7/mod.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run_day7_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `TodoStatus` is never used
[INFO] [stderr]   --> src/day7/todo_system.rs:77:6
[INFO] [stderr]    |
[INFO] [stderr] 77 | enum TodoStatus {
[INFO] [stderr]    |      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Todo` is never constructed
[INFO] [stderr]   --> src/day7/todo_system.rs:87:8
[INFO] [stderr]    |
[INFO] [stderr] 87 | struct Todo {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `start`, `complete`, `is_completed`, and `status_text` are never used
[INFO] [stderr]    --> src/day7/todo_system.rs:97:8
[INFO] [stderr]     |
[INFO] [stderr]  95 | impl Todo {
[INFO] [stderr]     | --------- associated items in this implementation
[INFO] [stderr]  96 |     // TODO: new 메서드 구현
[INFO] [stderr]  97 |     fn new(id: u32, title: String, description: String) -> Todo {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 107 |     fn start(&mut self) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 112 |     fn complete(&mut self) {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 117 |     fn is_completed(&self) -> bool {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 125 |     fn status_text(&self) -> &str {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `TodoList` is never constructed
[INFO] [stderr]    --> src/day7/todo_system.rs:136:8
[INFO] [stderr]     |
[INFO] [stderr] 136 | struct TodoList {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: multiple associated items are never used
[INFO] [stderr]    --> src/day7/todo_system.rs:145:8
[INFO] [stderr]     |
[INFO] [stderr] 143 | impl TodoList {
[INFO] [stderr]     | ------------- associated items in this implementation
[INFO] [stderr] 144 |     // TODO: new 메서드 구현
[INFO] [stderr] 145 |     fn new() -> TodoList {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 152 |     fn add(&mut self, title: String, description: String) -> u32 {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 160 |     fn get(&self, id: u32) -> Option<&Todo> {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 165 |     fn get_mut(&mut self, id: u32) -> Option<&mut Todo> {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 169 |     fn remove(&mut self, id: u32) -> bool {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 179 |     fn list_all(&self) -> &Vec<Todo> {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 183 |     fn list_by_status(&self, status: TodoStatus) -> Vec<&Todo> {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 191 |     fn count_by_status(&self, status: TodoStatus) -> usize {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]    --> src/day7/todo_system.rs:199:8
[INFO] [stderr]     |
[INFO] [stderr] 199 | pub fn run() {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day8_exercises` is never used
[INFO] [stderr]  --> src/day8/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day8_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day8/calculator_module.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]   --> src/day8/calculator_module.rs:26:16
[INFO] [stderr]    |
[INFO] [stderr] 26 |         pub fn add(a: f64, b: f64) -> f64 {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `subtract` is never used
[INFO] [stderr]   --> src/day8/calculator_module.rs:29:16
[INFO] [stderr]    |
[INFO] [stderr] 29 |         pub fn subtract(a: f64, b: f64) -> f64 {
[INFO] [stderr]    |                ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `multiply` is never used
[INFO] [stderr]   --> src/day8/calculator_module.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |         pub fn multiply(a: f64, b: f64) -> f64 {
[INFO] [stderr]    |                ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `divide` is never used
[INFO] [stderr]   --> src/day8/calculator_module.rs:35:16
[INFO] [stderr]    |
[INFO] [stderr] 35 |         pub fn divide(a: f64, b: f64) -> Option<f64> {
[INFO] [stderr]    |                ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `power` is never used
[INFO] [stderr]   --> src/day8/calculator_module.rs:44:16
[INFO] [stderr]    |
[INFO] [stderr] 44 |         pub fn power(base: f64, exponent: f64) -> f64 {
[INFO] [stderr]    |                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `square_root` is never used
[INFO] [stderr]   --> src/day8/calculator_module.rs:48:16
[INFO] [stderr]    |
[INFO] [stderr] 48 |         pub fn square_root(x: f64) -> Option<f64> {
[INFO] [stderr]    |                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day8/config_management.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `AppConfig` is never constructed
[INFO] [stderr]   --> src/day8/config_management.rs:29:16
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub struct AppConfig {
[INFO] [stderr]    |                ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `get_app_name`, and `enable_debug` are never used
[INFO] [stderr]   --> src/day8/config_management.rs:37:16
[INFO] [stderr]    |
[INFO] [stderr] 36 |     impl AppConfig {
[INFO] [stderr]    |     -------------- associated items in this implementation
[INFO] [stderr] 37 |         pub fn new(app_name: String, version: String) -> AppConfig {
[INFO] [stderr]    |                ^^^
[INFO] [stderr] ...
[INFO] [stderr] 45 |         pub fn get_app_name(&self) -> &str {
[INFO] [stderr]    |                ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 49 |         pub fn enable_debug(&mut self) {
[INFO] [stderr]    |                ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day8/library_system.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Book` is never constructed
[INFO] [stderr]   --> src/day8/library_system.rs:24:20
[INFO] [stderr]    |
[INFO] [stderr] 24 |         pub struct Book {
[INFO] [stderr]    |                    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `create_book` is never used
[INFO] [stderr]   --> src/day8/library_system.rs:29:16
[INFO] [stderr]    |
[INFO] [stderr] 29 |         pub fn create_book(title: String, author: String) -> Book {
[INFO] [stderr]    |                ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Member` is never constructed
[INFO] [stderr]   --> src/day8/library_system.rs:37:20
[INFO] [stderr]    |
[INFO] [stderr] 37 |         pub struct Member {
[INFO] [stderr]    |                    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `create_member` is never used
[INFO] [stderr]   --> src/day8/library_system.rs:42:16
[INFO] [stderr]    |
[INFO] [stderr] 42 |         pub fn create_member(name: String, id: u32) -> Member {
[INFO] [stderr]    |                ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run_day9_exercises` is never used
[INFO] [stderr]  --> src/day9/mod.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn run_day9_exercises() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `PhoneBook` is never constructed
[INFO] [stderr]   --> src/day9/phone_book.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | struct PhoneBook {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add`, `get`, `remove`, and `list_all` are never used
[INFO] [stderr]   --> src/day9/phone_book.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | impl PhoneBook {
[INFO] [stderr]    | -------------- associated items in this implementation
[INFO] [stderr] 39 |     // TODO: new 메서드를 구현하세요
[INFO] [stderr] 40 |     fn new() -> PhoneBook {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 47 |     fn add(&mut self, _name: String, _phone: String) {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 52 |     fn get(&self, _name: &str) -> Option<&String> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 57 |     fn remove(&mut self, _name: &str) -> bool {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 62 |     fn list_all(&self) -> Vec<(&String, &String)> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day9/phone_book.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `calculate_average` is never used
[INFO] [stderr]   --> src/day9/student_grades.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn calculate_average(_scores: &Vec<i32>) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_highest` is never used
[INFO] [stderr]   --> src/day9/student_grades.rs:36:4
[INFO] [stderr]    |
[INFO] [stderr] 36 | fn find_highest(_scores: &Vec<i32>) -> Option<i32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_lowest` is never used
[INFO] [stderr]   --> src/day9/student_grades.rs:51:4
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn find_lowest(_scores: &Vec<i32>) -> Option<i32> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `filter_passing` is never used
[INFO] [stderr]   --> src/day9/student_grades.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn filter_passing(_scores: &Vec<i32>, _passing_score: i32) -> Vec<i32> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day9/student_grades.rs:77:8
[INFO] [stderr]    |
[INFO] [stderr] 77 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `count_words` is never used
[INFO] [stderr]   --> src/day9/word_frequency.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn count_words(_text: &str) -> HashMap<String, usize> {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `find_most_frequent` is never used
[INFO] [stderr]   --> src/day9/word_frequency.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn find_most_frequent(_word_counts: &HashMap<String, usize>) -> Option<(String, usize)> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/day9/word_frequency.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-basic` (bin "rust-basic" test) generated 217 warnings (run `cargo fix --bin "rust-basic" -p rust-basic --tests` to apply 13 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/build/rust-basic/9bc421015845b9c0/deps/rust_basic-9bc421015845b9c0)
[INFO] [stdout] 
[INFO] [stdout] running 26 tests
[INFO] [stdout] test day5::bank_account::tests::test_account_creation ... ok
[INFO] [stdout] test day5::bank_account::tests::test_deposit ... ok
[INFO] [stdout] test day5::bank_account::tests::test_insufficient_balance ... ok
[INFO] [stdout] test day5::bank_account::tests::test_withdraw ... ok
[INFO] [stdout] test day5::book::tests::test_book_borrow ... ok
[INFO] [stdout] test day5::book::tests::test_book_creation ... ok
[INFO] [stdout] test day5::point::tests::test_distance_to ... ok
[INFO] [stdout] test day6::calculator::tests::test_add ... ok
[INFO] [stdout] test day5::point::tests::test_point_creation ... ok
[INFO] [stdout] test day6::calculator::tests::test_divide_by_zero ... ok
[INFO] [stdout] test day6::calculator::tests::test_divide ... ok
[INFO] [stdout] test day5::book::tests::test_book_description ... ok
[INFO] [stdout] test day6::calculator::tests::test_multiply ... ok
[INFO] [stdout] test day6::message::tests::test_filter_long_videos ... ok
[INFO] [stdout] test day6::calculator::tests::test_subtract ... ok
[INFO] [stdout] test day6::message::tests::test_process_image ... ok
[INFO] [stdout] test day6::message::tests::test_process_text ... ok
[INFO] [stdout] test day6::vehicle::tests::test_bicycle_travel_time ... ok
[INFO] [stdout] test day6::vehicle::tests::test_car_describe ... ok
[INFO] [stdout] test day6::vehicle::tests::test_car_travel_time ... ok
[INFO] [stdout] test day6::vehicle::tests::test_train_travel_time ... ok
[INFO] [stdout] test day6::vehicle::tests::test_bicycle_describe ... ok
[INFO] [stdout] test day5::book::tests::test_book_return ... ok
[INFO] [stdout] test day5::point::tests::test_distance_from_origin ... ok
[INFO] [stdout] test day6::message::tests::test_process_video ... ok
[INFO] [stdout] test day6::vehicle::tests::test_train_describe ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- day6::vehicle::tests::test_train_describe stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'day6::vehicle::tests::test_train_describe' (41) panicked at src/day6/vehicle.rs:106:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: "노선 1호선의 역삼역역에서 기차로 이동"
[INFO] [stdout]  right: "노선 1호선의 역삼역에서 기차로 이동"
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x611628f0d562 - std[840933623431fd06]::backtrace_rs::backtrace::libunwind::trace
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x611628f0d562 - std[840933623431fd06]::backtrace_rs::backtrace::trace_unsynchronized::<std[840933623431fd06]::sys::backtrace::_print_fmt::{closure#1}>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x611628f0d562 - std[840933623431fd06]::sys::backtrace::_print_fmt
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x611628f0d562 - <<std[840933623431fd06]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[8f93d80df273fe75]::fmt::Display>::fmt
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x611628f221da - <core[8f93d80df273fe75]::fmt::rt::Argument>::fmt
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x611628f221da - core[8f93d80df273fe75]::fmt::write
[INFO] [stdout]    6:     0x611628f12396 - std[840933623431fd06]::io::default_write_fmt::<alloc[40b2bae28975ac47]::vec::Vec<u8>>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x611628f12396 - <alloc[40b2bae28975ac47]::vec::Vec<u8> as std[840933623431fd06]::io::Write>::write_fmt
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x611628eeba2f - <std[840933623431fd06]::sys::backtrace::BacktraceLock>::print
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x611628eeba2f - std[840933623431fd06]::panicking::default_hook::{closure#0}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x611628f05899 - std[840933623431fd06]::panicking::default_hook
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x611628ea078e - <alloc[40b2bae28975ac47]::boxed::Box<dyn for<'a, 'b> core[8f93d80df273fe75]::ops::function::Fn<(&'a std[840933623431fd06]::panic::PanicHookInfo<'b>,), Output = ()> + core[8f93d80df273fe75]::marker::Sync + core[8f93d80df273fe75]::marker::Send> as core[8f93d80df273fe75]::ops::function::Fn<(&std[840933623431fd06]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x611628ea078e - test[2f1252070343a163]::test_main_with_exit_callback::<test[2f1252070343a163]::test_main::{closure#0}>::{closure#0}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x611628f05a52 - <alloc[40b2bae28975ac47]::boxed::Box<dyn for<'a, 'b> core[8f93d80df273fe75]::ops::function::Fn<(&'a std[840933623431fd06]::panic::PanicHookInfo<'b>,), Output = ()> + core[8f93d80df273fe75]::marker::Sync + core[8f93d80df273fe75]::marker::Send> as core[8f93d80df273fe75]::ops::function::Fn<(&std[840933623431fd06]::panic::PanicHookInfo,)>>::call
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x611628f05a52 - std[840933623431fd06]::panicking::panic_with_hook
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x611628eebae8 - std[840933623431fd06]::panicking::panic_handler::{closure#0}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x611628ee34b9 - std[840933623431fd06]::sys::backtrace::__rust_end_short_backtrace::<std[840933623431fd06]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x611628eec93d - __rustc[5b4a0c6d8cc4a177]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x611628f228ac - core[8f93d80df273fe75]::panicking::panic_fmt
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x611628f22763 - core[8f93d80df273fe75]::panicking::assert_failed_inner
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/panicking.rs:439:17
[INFO] [stdout]   20:     0x611628e93e72 - core[8f93d80df273fe75]::panicking::assert_failed::<alloc[40b2bae28975ac47]::string::String, &str>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/panicking.rs:394:5
[INFO] [stdout]   21:     0x611628e92867 - rust_basic[fc3a03e6df41ca5d]::day6::vehicle::tests::test_train_describe
[INFO] [stdout]                                at /opt/rustwide/workdir/src/day6/vehicle.rs:106:9
[INFO] [stdout]   22:     0x611628e92077 - rust_basic[fc3a03e6df41ca5d]::day6::vehicle::tests::test_train_describe::{closure#0}
[INFO] [stdout]                                at /opt/rustwide/workdir/src/day6/vehicle.rs:100:29
[INFO] [stdout]   23:     0x611628e90a16 - <rust_basic[fc3a03e6df41ca5d]::day6::vehicle::tests::test_train_describe::{closure#0} as core[8f93d80df273fe75]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x611628e94b3b - <fn() -> core[8f93d80df273fe75]::result::Result<(), alloc[40b2bae28975ac47]::string::String> as core[8f93d80df273fe75]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x611628e94b3b - test[2f1252070343a163]::__rust_begin_short_backtrace::<core[8f93d80df273fe75]::result::Result<(), alloc[40b2bae28975ac47]::string::String>, fn() -> core[8f93d80df273fe75]::result::Result<(), alloc[40b2bae28975ac47]::string::String>>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x611628ea139a - test[2f1252070343a163]::run_test_in_process::{closure#0}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x611628ea139a - <core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<test[2f1252070343a163]::run_test_in_process::{closure#0}> as core[8f93d80df273fe75]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x611628ea139a - std[840933623431fd06]::panicking::catch_unwind::do_call::<core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<test[2f1252070343a163]::run_test_in_process::{closure#0}>, core[8f93d80df273fe75]::result::Result<(), alloc[40b2bae28975ac47]::string::String>>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x611628ea139a - std[840933623431fd06]::panicking::catch_unwind::<core[8f93d80df273fe75]::result::Result<(), alloc[40b2bae28975ac47]::string::String>, core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<test[2f1252070343a163]::run_test_in_process::{closure#0}>>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x611628ea139a - std[840933623431fd06]::panic::catch_unwind::<core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<test[2f1252070343a163]::run_test_in_process::{closure#0}>, core[8f93d80df273fe75]::result::Result<(), alloc[40b2bae28975ac47]::string::String>>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x611628ea139a - test[2f1252070343a163]::run_test_in_process
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x611628ea139a - test[2f1252070343a163]::run_test::{closure#0}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x611628e9b864 - test[2f1252070343a163]::run_test::{closure#1}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x611628e9b864 - std[840933623431fd06]::sys::backtrace::__rust_begin_short_backtrace::<test[2f1252070343a163]::run_test::{closure#1}, ()>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x611628ea3e92 - std[840933623431fd06]::thread::lifecycle::spawn_unchecked::<test[2f1252070343a163]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x611628ea3e92 - <core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<std[840933623431fd06]::thread::lifecycle::spawn_unchecked<test[2f1252070343a163]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}> as core[8f93d80df273fe75]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x611628ea3e92 - std[840933623431fd06]::panicking::catch_unwind::do_call::<core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<std[840933623431fd06]::thread::lifecycle::spawn_unchecked<test[2f1252070343a163]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x611628ea3e92 - std[840933623431fd06]::panicking::catch_unwind::<(), core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<std[840933623431fd06]::thread::lifecycle::spawn_unchecked<test[2f1252070343a163]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x611628ea3e92 - std[840933623431fd06]::panic::catch_unwind::<core[8f93d80df273fe75]::panic::unwind_safe::AssertUnwindSafe<std[840933623431fd06]::thread::lifecycle::spawn_unchecked<test[2f1252070343a163]::run_test::{closure#1}, ()>::{closure#1}::{closure#0}>, ()>
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x611628ea3e92 - std[840933623431fd06]::thread::lifecycle::spawn_unchecked::<test[2f1252070343a163]::run_test::{closure#1}, ()>::{closure#1}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x611628ea3e92 - <std[840933623431fd06]::thread::lifecycle::spawn_unchecked<test[2f1252070343a163]::run_test::{closure#1}, ()>::{closure#1} as core[8f93d80df273fe75]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x611628f0ce0f - <alloc[40b2bae28975ac47]::boxed::Box<dyn core[8f93d80df273fe75]::ops::function::FnOnce<(), Output = ()> + core[8f93d80df273fe75]::marker::Send> as core[8f93d80df273fe75]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   43:     0x611628f0ce0f - <std[840933623431fd06]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]                                at /rustc/bd7d74411512a3dd3b35d2f699c51dd2557c7e7e/library/std/src/sys/thread/unix.rs:119:17
[INFO] [stdout]   44:     0x7b3abc7b1aa4 - <unknown>
[INFO] [stdout]   45:     0x7b3abc83ea64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     day6::vehicle::tests::test_train_describe
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 25 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rust-basic`
[INFO] running `Command { std: "docker" "inspect" "3fdd25b317bd108249778a2e1bbea451591d30d823f79c4d1053679956e4814d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fdd25b317bd108249778a2e1bbea451591d30d823f79c4d1053679956e4814d", kill_on_drop: false }`
[INFO] [stdout] 3fdd25b317bd108249778a2e1bbea451591d30d823f79c4d1053679956e4814d
