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[INFO] [stdout] warning: unexpected `cfg` condition value: `systemd`
[INFO] [stdout]    --> src/modules.rs:234:11
[INFO] [stdout]     |
[INFO] [stdout] 234 |     #[cfg(feature = "systemd")]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]     |
[INFO] [stdout]     = note: no expected values for `feature`
[INFO] [stdout]     = help: consider adding `systemd` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `html_div`
[INFO] [stdout]    --> src/macros.rs:400:18
[INFO] [stdout]     |
[INFO] [stdout] 400 |     macro_rules! html_div {
[INFO] [stdout]     |                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/testing.rs:282:9
[INFO] [stdout]     |
[INFO] [stdout] 282 |     use super::*;
[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::fmt`
[INFO] [stdout]  --> src/best_practices.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `systemd`
[INFO] [stdout]    --> src/modules.rs:234:11
[INFO] [stdout]     |
[INFO] [stdout] 234 |     #[cfg(feature = "systemd")]
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]     |
[INFO] [stdout]     = note: no expected values for `feature`
[INFO] [stdout]     = help: consider adding `systemd` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `html_div`
[INFO] [stdout]    --> src/macros.rs:400:18
[INFO] [stdout]     |
[INFO] [stdout] 400 |     macro_rules! html_div {
[INFO] [stdout]     |                  ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/best_practices.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::fmt;
[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 variable: `service_name`
[INFO] [stdout]    --> src/error_handling.rs:901:29
[INFO] [stdout]     |
[INFO] [stdout] 901 |     fn handle_payment_error(service_name: &str, message: &str) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_service_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `service_name`
[INFO] [stdout]    --> src/error_handling.rs:901:29
[INFO] [stdout]     |
[INFO] [stdout] 901 |     fn handle_payment_error(service_name: &str, message: &str) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_service_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]    --> src/basics.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 113 |     impl ModernStack {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |         fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]    --> src/basics.rs:186:12
[INFO] [stdout]     |
[INFO] [stdout] 159 |     impl ModernQueue {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 186 |         fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `value`, and `neighbors` are never read
[INFO] [stdout]    --> src/ownership.rs:574:9
[INFO] [stdout]     |
[INFO] [stdout] 573 |     struct GraphNode {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 574 |         id: u32,
[INFO] [stdout]     |         ^^
[INFO] [stdout] 575 |         value: String,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 576 |         neighbors: Vec<Weak<Node>>,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `GraphNode` 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 `add_neighbor` is never used
[INFO] [stdout]    --> src/ownership.rs:590:12
[INFO] [stdout]     |
[INFO] [stdout] 581 |     impl GraphNode {
[INFO] [stdout]     |     -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 590 |         fn add_neighbor(&self, _neighbor: &Node) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `distance` and `travel_time` are never read
[INFO] [stdout]    --> src/types.rs:453:9
[INFO] [stdout]     |
[INFO] [stdout] 452 |     struct Route {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 453 |         distance: f64,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 454 |         travel_time: f64,
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Route` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Drawable` is never used
[INFO] [stdout]    --> src/types.rs:592:11
[INFO] [stdout]     |
[INFO] [stdout] 592 |     trait Drawable {
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Red` is never constructed
[INFO] [stdout]    --> src/types.rs:600:12
[INFO] [stdout]     |
[INFO] [stdout] 600 |     struct Red;
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Blue` is never constructed
[INFO] [stdout]    --> src/types.rs:602:12
[INFO] [stdout]     |
[INFO] [stdout] 602 |     struct Blue;
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RedCircle` is never constructed
[INFO] [stdout]    --> src/types.rs:605:12
[INFO] [stdout]     |
[INFO] [stdout] 605 |     struct RedCircle {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlueRectangle` is never constructed
[INFO] [stdout]    --> src/types.rs:611:12
[INFO] [stdout]     |
[INFO] [stdout] 611 |     struct BlueRectangle {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `disable` is never used
[INFO] [stdout]    --> src/types.rs:721:12
[INFO] [stdout]     |
[INFO] [stdout] 720 |     impl LightSwitch<Enabled> {
[INFO] [stdout]     |     ------------------------- method in this implementation
[INFO] [stdout] 721 |         fn disable(self) -> LightSwitch<Disabled> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove` is never used
[INFO] [stdout]    --> src/types.rs:827:12
[INFO] [stdout]     |
[INFO] [stdout] 815 |     impl Composite {
[INFO] [stdout]     |     -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 827 |         fn remove(&mut self, index: usize) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]    --> src/types.rs:954:12
[INFO] [stdout]     |
[INFO] [stdout] 954 |     struct Container<T> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, `get`, and `len` are never used
[INFO] [stdout]    --> src/types.rs:960:12
[INFO] [stdout]     |
[INFO] [stdout] 959 |     impl<T> Container<T> {
[INFO] [stdout]     |     -------------------- associated items in this implementation
[INFO] [stdout] 960 |         fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 967 |         fn push(&mut self, item: T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 971 |         fn get(&self, index: usize) -> Option<&T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 975 |         fn len(&self) -> usize {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PublishedState` is never constructed
[INFO] [stdout]     --> src/types.rs:1059:12
[INFO] [stdout]      |
[INFO] [stdout] 1059 |     struct PublishedState;
[INFO] [stdout]      |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_content` is never used
[INFO] [stdout]     --> src/types.rs:1067:12
[INFO] [stdout]      |
[INFO] [stdout] 1066 |     impl SimpleDocument<PublishedState> {
[INFO] [stdout]      |     ----------------------------------- method in this implementation
[INFO] [stdout] 1067 |         fn get_content(&self) -> &str {
[INFO] [stdout]      |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Seconds` is never constructed
[INFO] [stdout]     --> src/types.rs:1160:12
[INFO] [stdout]      |
[INFO] [stdout] 1160 |     struct Seconds(f64);
[INFO] [stdout]      |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_meters` is never used
[INFO] [stdout]     --> src/types.rs:1169:12
[INFO] [stdout]      |
[INFO] [stdout] 1168 |     impl Kilometers {
[INFO] [stdout]      |     --------------- method in this implementation
[INFO] [stdout] 1169 |         fn to_meters(self) -> Meters {
[INFO] [stdout]      |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NetworkError` and `JsonParsingError` are never constructed
[INFO] [stdout]    --> src/error_handling.rs:274:9
[INFO] [stdout]     |
[INFO] [stdout] 270 |     enum NetworkError {
[INFO] [stdout]     |          ------------ variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 274 |         NetworkError(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 275 |         JsonParsingError,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `NetworkError` 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 `fetch_user_data` is never used
[INFO] [stdout]    --> src/error_handling.rs:291:14
[INFO] [stdout]     |
[INFO] [stdout] 291 |     async fn fetch_user_data(user_id: u32) -> Result<String, NetworkError> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_config_file` is never used
[INFO] [stdout]    --> src/error_handling.rs:352:8
[INFO] [stdout]     |
[INFO] [stdout] 352 |     fn read_config_file() -> Result<String, io::Error> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InvalidType` and `FileParseError` are never constructed
[INFO] [stdout]    --> src/error_handling.rs:419:9
[INFO] [stdout]     |
[INFO] [stdout] 417 |     enum ConfigError {
[INFO] [stdout]     |          ----------- variants in this enum
[INFO] [stdout] 418 |         MissingField(String),
[INFO] [stdout] 419 |         InvalidType { field: String, expected: String, actual: String },
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 420 |         InvalidValue { field: String, value: String, reason: String },
[INFO] [stdout] 421 |         FileParseError(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ConfigError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `host`, `port`, `database_url`, and `debug` are never read
[INFO] [stdout]    --> src/error_handling.rs:442:9
[INFO] [stdout]     |
[INFO] [stdout] 441 |     struct AppConfig {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 442 |         host: String,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 443 |         port: u16,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 444 |         database_url: String,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 445 |         debug: bool,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `AppConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `ForbiddenAction` is never constructed
[INFO] [stdout]    --> src/error_handling.rs:543:9
[INFO] [stdout]     |
[INFO] [stdout] 538 |     enum ValidationError {
[INFO] [stdout]     |          --------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 543 |         ForbiddenAction(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ValidationError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `TimeoutError` is never constructed
[INFO] [stdout]    --> src/error_handling.rs:666:9
[INFO] [stdout]     |
[INFO] [stdout] 663 |     enum ResourceError {
[INFO] [stdout]     |          ------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 666 |         TimeoutError,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ResourceError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `price`, `category`, and `stock` are never read
[INFO] [stdout]    --> src/modules.rs:345:17
[INFO] [stdout]     |
[INFO] [stdout] 342 |         pub struct Product {
[INFO] [stdout]     |                    ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 345 |             pub price: f64,
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout] 346 |             pub category: String,
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout] 347 |             pub stock: u32,
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Product` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_by_id` is never used
[INFO] [stdout]    --> src/modules.rs:352:16
[INFO] [stdout]     |
[INFO] [stdout] 351 |         pub trait UserRepository {
[INFO] [stdout]     |                   -------------- method in this trait
[INFO] [stdout] 352 |             fn find_by_id(&self, id: u64) -> Option<User>;
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_by_id` is never used
[INFO] [stdout]    --> src/modules.rs:359:16
[INFO] [stdout]     |
[INFO] [stdout] 358 |         pub trait ProductRepository {
[INFO] [stdout]     |                   ----------------- method in this trait
[INFO] [stdout] 359 |             fn find_by_id(&self, id: u64) -> Option<Product>;
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `product_service` is never read
[INFO] [stdout]    --> src/modules.rs:595:13
[INFO] [stdout]     |
[INFO] [stdout] 593 |         pub struct ApiGateway {
[INFO] [stdout]     |                    ---------- field in this struct
[INFO] [stdout] 594 |             user_service: user_service::UserService,
[INFO] [stdout] 595 |             product_service: product_service::ProductService,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Processing` and `Completed` are never constructed
[INFO] [stdout]    --> src/macros.rs:794:9
[INFO] [stdout]     |
[INFO] [stdout] 792 |     enum SimpleState {
[INFO] [stdout]     |          ----------- variants in this enum
[INFO] [stdout] 793 |         Idle,
[INFO] [stdout] 794 |         Processing,
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 795 |         Completed,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SimpleState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `items` are never read
[INFO] [stdout]    --> src/testing.rs:752:13
[INFO] [stdout]     |
[INFO] [stdout] 751 |     pub struct Order {
[INFO] [stdout]     |                ----- fields in this struct
[INFO] [stdout] 752 |         pub id: u32,
[INFO] [stdout]     |             ^^
[INFO] [stdout] 753 |         pub items: Vec<OrderItem>,
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Order` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `product_id` is never read
[INFO] [stdout]    --> src/testing.rs:760:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |     pub struct OrderItem {
[INFO] [stdout]     |                --------- field in this struct
[INFO] [stdout] 760 |         pub product_id: u32,
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OrderItem` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Cancelled` is never constructed
[INFO] [stdout]    --> src/testing.rs:769:9
[INFO] [stdout]     |
[INFO] [stdout] 766 |     pub enum OrderStatus {
[INFO] [stdout]     |              ----------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 769 |         Cancelled,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OrderStatus` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/advanced_patterns.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct DatabaseConfig {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] 15 |     host: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     port: u16,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 17 |     database: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     username: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 19 |     password: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 20 |     pool_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 21 |     timeout_secs: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DatabaseConfig` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `AppResult` is never used
[INFO] [stdout]   --> src/best_practices.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 |     type AppResult<T> = anyhow::Result<T>;
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `UserNotFound` and `PermissionDenied` are never constructed
[INFO] [stdout]   --> src/best_practices.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     enum BusinessError {
[INFO] [stdout]    |          ------------- variants in this enum
[INFO] [stdout] 21 |         #[error("用户不存在: {0}")]
[INFO] [stdout] 22 |         UserNotFound(String),
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 23 |         #[error("权限不足: {0}")]
[INFO] [stdout] 24 |         PermissionDenied(String),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BusinessError` 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_user_data` is never used
[INFO] [stdout]   --> src/best_practices.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn process_user_data(user_id: &str) -> AppResult<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> src/best_practices.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 201 |     struct Node {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 202 |         value: i32,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a`, `b`, `c`, `d`, and `e` are never read
[INFO] [stdout]    --> src/best_practices.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |     struct UnoptimizedStruct {
[INFO] [stdout]     |            ----------------- fields in this struct
[INFO] [stdout] 231 |         a: u8,    // 1字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 232 |         b: u64,   // 8字节 (需要8字节对齐)
[INFO] [stdout]     |         ^
[INFO] [stdout] 233 |         c: u32,   // 4字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 234 |         d: u16,   // 2字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 235 |         e: u8,    // 1字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ApiError` is never used
[INFO] [stdout]    --> src/best_practices.rs:362:14
[INFO] [stdout]     |
[INFO] [stdout] 362 |     pub enum ApiError {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ApiResult` is never used
[INFO] [stdout]    --> src/best_practices.rs:380:10
[INFO] [stdout]     |
[INFO] [stdout] 380 |     type ApiResult<T> = Result<T, ApiError>;
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Validator` is never used
[INFO] [stdout]    --> src/best_practices.rs:383:15
[INFO] [stdout]     |
[INFO] [stdout] 383 |     pub trait Validator {
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_email_correct_format` is never used
[INFO] [stdout]    --> src/best_practices.rs:428:12
[INFO] [stdout]     |
[INFO] [stdout] 428 |         fn validate_email_correct_format() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_config_functionality` is never used
[INFO] [stdout]    --> src/best_practices.rs:434:12
[INFO] [stdout]     |
[INFO] [stdout] 434 |         fn test_config_functionality() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panics_on_invalid_input` is never used
[INFO] [stdout]    --> src/best_practices.rs:442:12
[INFO] [stdout]     |
[INFO] [stdout] 442 |         fn panics_on_invalid_input() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_first_element` is never used
[INFO] [stdout]   --> src/pitfalls.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn return_first_element() -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]    --> src/pitfalls.rs:257:12
[INFO] [stdout]     |
[INFO] [stdout] 257 |     struct Node {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SafeNode` is never constructed
[INFO] [stdout]    --> src/pitfalls.rs:286:12
[INFO] [stdout]     |
[INFO] [stdout] 286 |     struct SafeNode {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `data` and `metadata` are never read
[INFO] [stdout]    --> src/pitfalls.rs:296:9
[INFO] [stdout]     |
[INFO] [stdout] 295 |     struct LargeData {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 296 |         data: Vec<u8>,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 297 |         metadata: Vec<String>,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]    --> src/basics.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 113 |     impl ModernStack {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |         fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]    --> src/basics.rs:186:12
[INFO] [stdout]     |
[INFO] [stdout] 159 |     impl ModernQueue {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 186 |         fn is_empty(&self) -> bool {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `value`, and `neighbors` are never read
[INFO] [stdout]    --> src/ownership.rs:574:9
[INFO] [stdout]     |
[INFO] [stdout] 573 |     struct GraphNode {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 574 |         id: u32,
[INFO] [stdout]     |         ^^
[INFO] [stdout] 575 |         value: String,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout] 576 |         neighbors: Vec<Weak<Node>>,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `GraphNode` 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 `add_neighbor` is never used
[INFO] [stdout]    --> src/ownership.rs:590:12
[INFO] [stdout]     |
[INFO] [stdout] 581 |     impl GraphNode {
[INFO] [stdout]     |     -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 590 |         fn add_neighbor(&self, _neighbor: &Node) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `distance` and `travel_time` are never read
[INFO] [stdout]    --> src/types.rs:453:9
[INFO] [stdout]     |
[INFO] [stdout] 452 |     struct Route {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 453 |         distance: f64,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 454 |         travel_time: f64,
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Route` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Drawable` is never used
[INFO] [stdout]    --> src/types.rs:592:11
[INFO] [stdout]     |
[INFO] [stdout] 592 |     trait Drawable {
[INFO] [stdout]     |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Red` is never constructed
[INFO] [stdout]    --> src/types.rs:600:12
[INFO] [stdout]     |
[INFO] [stdout] 600 |     struct Red;
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Blue` is never constructed
[INFO] [stdout]    --> src/types.rs:602:12
[INFO] [stdout]     |
[INFO] [stdout] 602 |     struct Blue;
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RedCircle` is never constructed
[INFO] [stdout]    --> src/types.rs:605:12
[INFO] [stdout]     |
[INFO] [stdout] 605 |     struct RedCircle {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlueRectangle` is never constructed
[INFO] [stdout]    --> src/types.rs:611:12
[INFO] [stdout]     |
[INFO] [stdout] 611 |     struct BlueRectangle {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `disable` is never used
[INFO] [stdout]    --> src/types.rs:721:12
[INFO] [stdout]     |
[INFO] [stdout] 720 |     impl LightSwitch<Enabled> {
[INFO] [stdout]     |     ------------------------- method in this implementation
[INFO] [stdout] 721 |         fn disable(self) -> LightSwitch<Disabled> {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove` is never used
[INFO] [stdout]    --> src/types.rs:827:12
[INFO] [stdout]     |
[INFO] [stdout] 815 |     impl Composite {
[INFO] [stdout]     |     -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 827 |         fn remove(&mut self, index: usize) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Container` is never constructed
[INFO] [stdout]    --> src/types.rs:954:12
[INFO] [stdout]     |
[INFO] [stdout] 954 |     struct Container<T> {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, `get`, and `len` are never used
[INFO] [stdout]    --> src/types.rs:960:12
[INFO] [stdout]     |
[INFO] [stdout] 959 |     impl<T> Container<T> {
[INFO] [stdout]     |     -------------------- associated items in this implementation
[INFO] [stdout] 960 |         fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 967 |         fn push(&mut self, item: T) {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 971 |         fn get(&self, index: usize) -> Option<&T> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 975 |         fn len(&self) -> usize {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PublishedState` is never constructed
[INFO] [stdout]     --> src/types.rs:1059:12
[INFO] [stdout]      |
[INFO] [stdout] 1059 |     struct PublishedState;
[INFO] [stdout]      |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_content` is never used
[INFO] [stdout]     --> src/types.rs:1067:12
[INFO] [stdout]      |
[INFO] [stdout] 1066 |     impl SimpleDocument<PublishedState> {
[INFO] [stdout]      |     ----------------------------------- method in this implementation
[INFO] [stdout] 1067 |         fn get_content(&self) -> &str {
[INFO] [stdout]      |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Seconds` is never constructed
[INFO] [stdout]     --> src/types.rs:1160:12
[INFO] [stdout]      |
[INFO] [stdout] 1160 |     struct Seconds(f64);
[INFO] [stdout]      |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_meters` is never used
[INFO] [stdout]     --> src/types.rs:1169:12
[INFO] [stdout]      |
[INFO] [stdout] 1168 |     impl Kilometers {
[INFO] [stdout]      |     --------------- method in this implementation
[INFO] [stdout] 1169 |         fn to_meters(self) -> Meters {
[INFO] [stdout]      |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NetworkError` and `JsonParsingError` are never constructed
[INFO] [stdout]    --> src/error_handling.rs:274:9
[INFO] [stdout]     |
[INFO] [stdout] 270 |     enum NetworkError {
[INFO] [stdout]     |          ------------ variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 274 |         NetworkError(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 275 |         JsonParsingError,
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `NetworkError` 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 `fetch_user_data` is never used
[INFO] [stdout]    --> src/error_handling.rs:291:14
[INFO] [stdout]     |
[INFO] [stdout] 291 |     async fn fetch_user_data(user_id: u32) -> Result<String, NetworkError> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_config_file` is never used
[INFO] [stdout]    --> src/error_handling.rs:352:8
[INFO] [stdout]     |
[INFO] [stdout] 352 |     fn read_config_file() -> Result<String, io::Error> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `InvalidType` and `FileParseError` are never constructed
[INFO] [stdout]    --> src/error_handling.rs:419:9
[INFO] [stdout]     |
[INFO] [stdout] 417 |     enum ConfigError {
[INFO] [stdout]     |          ----------- variants in this enum
[INFO] [stdout] 418 |         MissingField(String),
[INFO] [stdout] 419 |         InvalidType { field: String, expected: String, actual: String },
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 420 |         InvalidValue { field: String, value: String, reason: String },
[INFO] [stdout] 421 |         FileParseError(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ConfigError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `host`, `port`, `database_url`, and `debug` are never read
[INFO] [stdout]    --> src/error_handling.rs:442:9
[INFO] [stdout]     |
[INFO] [stdout] 441 |     struct AppConfig {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 442 |         host: String,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 443 |         port: u16,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 444 |         database_url: String,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 445 |         debug: bool,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `AppConfig` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `ForbiddenAction` is never constructed
[INFO] [stdout]    --> src/error_handling.rs:543:9
[INFO] [stdout]     |
[INFO] [stdout] 538 |     enum ValidationError {
[INFO] [stdout]     |          --------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 543 |         ForbiddenAction(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ValidationError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `TimeoutError` is never constructed
[INFO] [stdout]    --> src/error_handling.rs:666:9
[INFO] [stdout]     |
[INFO] [stdout] 663 |     enum ResourceError {
[INFO] [stdout]     |          ------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 666 |         TimeoutError,
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ResourceError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `price`, `category`, and `stock` are never read
[INFO] [stdout]    --> src/modules.rs:345:17
[INFO] [stdout]     |
[INFO] [stdout] 342 |         pub struct Product {
[INFO] [stdout]     |                    ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 345 |             pub price: f64,
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout] 346 |             pub category: String,
[INFO] [stdout]     |                 ^^^^^^^^
[INFO] [stdout] 347 |             pub stock: u32,
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Product` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_by_id` is never used
[INFO] [stdout]    --> src/modules.rs:352:16
[INFO] [stdout]     |
[INFO] [stdout] 351 |         pub trait UserRepository {
[INFO] [stdout]     |                   -------------- method in this trait
[INFO] [stdout] 352 |             fn find_by_id(&self, id: u64) -> Option<User>;
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_by_id` is never used
[INFO] [stdout]    --> src/modules.rs:359:16
[INFO] [stdout]     |
[INFO] [stdout] 358 |         pub trait ProductRepository {
[INFO] [stdout]     |                   ----------------- method in this trait
[INFO] [stdout] 359 |             fn find_by_id(&self, id: u64) -> Option<Product>;
[INFO] [stdout]     |                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `product_service` is never read
[INFO] [stdout]    --> src/modules.rs:595:13
[INFO] [stdout]     |
[INFO] [stdout] 593 |         pub struct ApiGateway {
[INFO] [stdout]     |                    ---------- field in this struct
[INFO] [stdout] 594 |             user_service: user_service::UserService,
[INFO] [stdout] 595 |             product_service: product_service::ProductService,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Processing` and `Completed` are never constructed
[INFO] [stdout]    --> src/macros.rs:794:9
[INFO] [stdout]     |
[INFO] [stdout] 792 |     enum SimpleState {
[INFO] [stdout]     |          ----------- variants in this enum
[INFO] [stdout] 793 |         Idle,
[INFO] [stdout] 794 |         Processing,
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 795 |         Completed,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SimpleState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id` and `items` are never read
[INFO] [stdout]    --> src/testing.rs:752:13
[INFO] [stdout]     |
[INFO] [stdout] 751 |     pub struct Order {
[INFO] [stdout]     |                ----- fields in this struct
[INFO] [stdout] 752 |         pub id: u32,
[INFO] [stdout]     |             ^^
[INFO] [stdout] 753 |         pub items: Vec<OrderItem>,
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Order` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `product_id` is never read
[INFO] [stdout]    --> src/testing.rs:760:13
[INFO] [stdout]     |
[INFO] [stdout] 759 |     pub struct OrderItem {
[INFO] [stdout]     |                --------- field in this struct
[INFO] [stdout] 760 |         pub product_id: u32,
[INFO] [stdout]     |             ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OrderItem` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Cancelled` is never constructed
[INFO] [stdout]    --> src/testing.rs:769:9
[INFO] [stdout]     |
[INFO] [stdout] 766 |     pub enum OrderStatus {
[INFO] [stdout]     |              ----------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 769 |         Cancelled,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `OrderStatus` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple fields are never read
[INFO] [stdout]   --> src/advanced_patterns.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct DatabaseConfig {
[INFO] [stdout]    |            -------------- fields in this struct
[INFO] [stdout] 15 |     host: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     port: u16,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 17 |     database: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 18 |     username: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 19 |     password: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 20 |     pool_size: usize,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 21 |     timeout_secs: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `DatabaseConfig` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `AppResult` is never used
[INFO] [stdout]   --> src/best_practices.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 |     type AppResult<T> = anyhow::Result<T>;
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `UserNotFound` and `PermissionDenied` are never constructed
[INFO] [stdout]   --> src/best_practices.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     enum BusinessError {
[INFO] [stdout]    |          ------------- variants in this enum
[INFO] [stdout] 21 |         #[error("用户不存在: {0}")]
[INFO] [stdout] 22 |         UserNotFound(String),
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 23 |         #[error("权限不足: {0}")]
[INFO] [stdout] 24 |         PermissionDenied(String),
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BusinessError` 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_user_data` is never used
[INFO] [stdout]   --> src/best_practices.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn process_user_data(user_id: &str) -> AppResult<String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]    --> src/best_practices.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 201 |     struct Node {
[INFO] [stdout]     |            ---- field in this struct
[INFO] [stdout] 202 |         value: i32,
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a`, `b`, `c`, `d`, and `e` are never read
[INFO] [stdout]    --> src/best_practices.rs:231:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |     struct UnoptimizedStruct {
[INFO] [stdout]     |            ----------------- fields in this struct
[INFO] [stdout] 231 |         a: u8,    // 1字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 232 |         b: u64,   // 8字节 (需要8字节对齐)
[INFO] [stdout]     |         ^
[INFO] [stdout] 233 |         c: u32,   // 4字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 234 |         d: u16,   // 2字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 235 |         e: u8,    // 1字节
[INFO] [stdout]     |         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ApiError` is never used
[INFO] [stdout]    --> src/best_practices.rs:362:14
[INFO] [stdout]     |
[INFO] [stdout] 362 |     pub enum ApiError {
[INFO] [stdout]     |              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `ApiResult` is never used
[INFO] [stdout]    --> src/best_practices.rs:380:10
[INFO] [stdout]     |
[INFO] [stdout] 380 |     type ApiResult<T> = Result<T, ApiError>;
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Validator` is never used
[INFO] [stdout]    --> src/best_practices.rs:383:15
[INFO] [stdout]     |
[INFO] [stdout] 383 |     pub trait Validator {
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_first_element` is never used
[INFO] [stdout]   --> src/pitfalls.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn return_first_element() -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]    --> src/pitfalls.rs:257:12
[INFO] [stdout]     |
[INFO] [stdout] 257 |     struct Node {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SafeNode` is never constructed
[INFO] [stdout]    --> src/pitfalls.rs:286:12
[INFO] [stdout]     |
[INFO] [stdout] 286 |     struct SafeNode {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `data` and `metadata` are never read
[INFO] [stdout]    --> src/pitfalls.rs:296:9
[INFO] [stdout]     |
[INFO] [stdout] 295 |     struct LargeData {
[INFO] [stdout]     |            --------- fields in this struct
[INFO] [stdout] 296 |         data: Vec<u8>,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 297 |         metadata: Vec<String>,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 28s
[INFO] running `Command { std: "docker" "inspect" "530153415f89da474c420c37f9321c434a7e201e21b95256d4e76e87569a5dfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "530153415f89da474c420c37f9321c434a7e201e21b95256d4e76e87569a5dfd", kill_on_drop: false }`
[INFO] [stdout] 530153415f89da474c420c37f9321c434a7e201e21b95256d4e76e87569a5dfd
