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[INFO] [stdout] ce5de19464f1b963a1d280b92adfe8ba2d8115c5
[INFO] testing kokodayou2000/rust_learn/ce5de19464f1b963a1d280b92adfe8ba2d8115c5 against master#d933cf483edf1605142ac6899ff32536c0ad8b22 for pr-150933
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkokodayou2000%2Frust_learn" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
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[INFO] finished tweaking git repo https://github.com/kokodayou2000/rust_learn
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[INFO] validating manifest of git repo https://github.com/kokodayou2000/rust_learn on toolchain d933cf483edf1605142ac6899ff32536c0ad8b22
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[INFO] [stdout] warning: unused imports: `Arc`, `LockResult`, and `Mutex`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_3_arc_1.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, LockResult, Mutex};
[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::thread`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_3_arc_1.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::borrow::Cow`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_4_cow_1.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use alloc::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/modules/base/smart_pointer/_2_drop_1.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let a = Person{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ListNode` is more private than the item `add_two_numbers`
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | / pub fn add_two_numbers(
[INFO] [stdout] 17 | |     l1: Option<Box<ListNode>>,
[INFO] [stdout] 18 | |     l2: Option<Box<ListNode>>,
[INFO] [stdout] 19 | | ) -> Option<Box<ListNode>> {
[INFO] [stdout]    | |__________________________^ function `add_two_numbers` is reachable at visibility `pub(in crate::modules::leetcode)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `ListNode` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | struct ListNode {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> src/modules/base/tuple.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Matrix(f32, f32, f32, f32);
[INFO] [stdout]    |        ------ ^^^  ^^^  ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `Matrix` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/modules/base/structure.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Unit` is never constructed
[INFO] [stdout]  --> src/modules/base/structure.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Unit;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/modules/base/structure.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Pair(i32, f32);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/modules/base/structure.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Point {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 17 |     x: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 18 |     y: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `structures_test` is never used
[INFO] [stdout]   --> src/modules/base/structure.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn structures_test() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Centimeters` is never constructed
[INFO] [stdout]  --> src/modules/base/trait_feature/derive.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Centimeters(f64);
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Inches` is never constructed
[INFO] [stdout]  --> src/modules/base/trait_feature/derive.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Inches(i32);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_centimeters` is never used
[INFO] [stdout]   --> src/modules/base/trait_feature/derive.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Inches {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 10 |     fn to_centimeters(&self) -> Centimeters {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Seconds` is never constructed
[INFO] [stdout]   --> src/modules/base/trait_feature/derive.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Seconds(i32);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `task` is never used
[INFO] [stdout]  --> src/modules/base/async_feature/simple_async.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | async fn task() {
[INFO] [stdout]   |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]  --> src/modules/base/smart_pointer/_1_defer_1.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct MyBox<T>(T);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/modules/base/smart_pointer/_2_drop_1.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_drop` is never used
[INFO] [stdout]   --> src/modules/base/smart_pointer/_2_drop_1.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn test_drop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Address` is never constructed
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Address {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/modules/base/smart_pointer/_5_cell_1.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `update_city` and `add_note` are never used
[INFO] [stdout]   --> src/modules/base/smart_pointer/_5_cell_1.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Person {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] 23 |     // 接收 &self，但内部仍然可以修改
[INFO] [stdout] 24 |     fn update_city(&self, new_city: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     fn add_note(&self, text: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/modules/examples/code_style.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) struct Person{
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/modules/examples/code_style.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Person {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 6 |     pub(crate) fn new() -> Person {
[INFO] [stdout]   |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `f1` is never used
[INFO] [stdout]   --> src/modules/examples/code_style.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Person{
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 15 |     pub(crate) fn f1(&self){
[INFO] [stdout]    |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `f2` is never used
[INFO] [stdout]   --> src/modules/examples/code_style.rs:21:19
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Person{
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 21 |     pub(crate) fn f2(&self){
[INFO] [stdout]    |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Calculator` is never constructed
[INFO] [stdout]  --> src/modules/examples/fib_calc.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Calculator<'ctx> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `eval` are never used
[INFO] [stdout]   --> src/modules/examples/fib_calc.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<'ctx> Calculator<'ctx> {
[INFO] [stdout]    | --------------------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn new<F>(f: F) -> Self
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn eval(&self, input: i64) -> i64 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Gender` is never used
[INFO] [stdout]  --> src/modules/diff/diff_java.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Gender {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/modules/diff/diff_java.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/modules/diff/diff_java.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Person {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 33 |     // 构造函数
[INFO] [stdout] 34 |     fn new(name: String, gender: Gender) -> Person {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `diff_java_override_to_string` is never used
[INFO] [stdout]   --> src/modules/diff/diff_java.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn diff_java_override_to_string(name: String,gender: Gender) -> Person {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum` is never used
[INFO] [stdout]  --> src/modules/leetcode/_1_two_sum.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ListNode` is never constructed
[INFO] [stdout]  --> src/modules/leetcode/_2_two_add.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct ListNode {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout]  9 |     #[inline]
[INFO] [stdout] 10 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two_numbers` is never used
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn add_two_numbers(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Logger` is never used
[INFO] [stdout]  --> src/modules/advance/log/mod.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub trait Logger: Send + Debug {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConsoleLogger` is never constructed
[INFO] [stdout]  --> src/modules/advance/log/console_logger.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ConsoleLogger {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileLogger` is never constructed
[INFO] [stdout]  --> src/modules/advance/log/file_logger.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct FileLogger {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 01s
[INFO] running `Command { std: "docker" "inspect" "cee8be7e9e0227122d4e66df44c69fffac248aa2a578ed875021aba5aa62a947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cee8be7e9e0227122d4e66df44c69fffac248aa2a578ed875021aba5aa62a947", kill_on_drop: false }`
[INFO] [stdout] cee8be7e9e0227122d4e66df44c69fffac248aa2a578ed875021aba5aa62a947
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+d933cf483edf1605142ac6899ff32536c0ad8b22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1147f605fb6211a89b85940aa6e0dcfb12b8d469d0b57a4c7c3d7aa0ec921cab
[INFO] running `Command { std: "docker" "start" "-a" "1147f605fb6211a89b85940aa6e0dcfb12b8d469d0b57a4c7c3d7aa0ec921cab", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `Arc`, `LockResult`, and `Mutex`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_3_arc_1.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, LockResult, Mutex};
[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::thread`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_3_arc_1.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::borrow::Cow`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_4_cow_1.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use alloc::borrow::Cow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/modules/base/smart_pointer/_2_drop_1.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let a = Person{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ListNode` is more private than the item `add_two_numbers`
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | / pub fn add_two_numbers(
[INFO] [stdout] 17 | |     l1: Option<Box<ListNode>>,
[INFO] [stdout] 18 | |     l2: Option<Box<ListNode>>,
[INFO] [stdout] 19 | | ) -> Option<Box<ListNode>> {
[INFO] [stdout]    | |__________________________^ function `add_two_numbers` is reachable at visibility `pub(in crate::modules::leetcode)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `ListNode` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | struct ListNode {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> src/modules/base/tuple.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Matrix(f32, f32, f32, f32);
[INFO] [stdout]    |        ------ ^^^  ^^^  ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `Matrix` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/modules/base/structure.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Unit` is never constructed
[INFO] [stdout]  --> src/modules/base/structure.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Unit;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/modules/base/structure.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Pair(i32, f32);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/modules/base/structure.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Point {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 17 |     x: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 18 |     y: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `structures_test` is never used
[INFO] [stdout]   --> src/modules/base/structure.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn structures_test() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Centimeters` is never constructed
[INFO] [stdout]  --> src/modules/base/trait_feature/derive.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Centimeters(f64);
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Inches` is never constructed
[INFO] [stdout]  --> src/modules/base/trait_feature/derive.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Inches(i32);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_centimeters` is never used
[INFO] [stdout]   --> src/modules/base/trait_feature/derive.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Inches {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 10 |     fn to_centimeters(&self) -> Centimeters {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Seconds` is never constructed
[INFO] [stdout]   --> src/modules/base/trait_feature/derive.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Seconds(i32);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `task` is never used
[INFO] [stdout]  --> src/modules/base/async_feature/simple_async.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | async fn task() {
[INFO] [stdout]   |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]  --> src/modules/base/smart_pointer/_1_defer_1.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct MyBox<T>(T);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/modules/base/smart_pointer/_2_drop_1.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_drop` is never used
[INFO] [stdout]   --> src/modules/base/smart_pointer/_2_drop_1.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn test_drop() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Address` is never constructed
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Address {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/modules/base/smart_pointer/_5_cell_1.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `update_city` and `add_note` are never used
[INFO] [stdout]   --> src/modules/base/smart_pointer/_5_cell_1.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Person {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] 23 |     // 接收 &self，但内部仍然可以修改
[INFO] [stdout] 24 |     fn update_city(&self, new_city: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     fn add_note(&self, text: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/modules/examples/code_style.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) struct Person{
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/modules/examples/code_style.rs:6:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Person {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 6 |     pub(crate) fn new() -> Person {
[INFO] [stdout]   |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `f1` is never used
[INFO] [stdout]   --> src/modules/examples/code_style.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Person{
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 15 |     pub(crate) fn f1(&self){
[INFO] [stdout]    |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `f2` is never used
[INFO] [stdout]   --> src/modules/examples/code_style.rs:21:19
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Person{
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 21 |     pub(crate) fn f2(&self){
[INFO] [stdout]    |                   ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Calculator` is never constructed
[INFO] [stdout]  --> src/modules/examples/fib_calc.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Calculator<'ctx> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `eval` are never used
[INFO] [stdout]   --> src/modules/examples/fib_calc.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<'ctx> Calculator<'ctx> {
[INFO] [stdout]    | --------------------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn new<F>(f: F) -> Self
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn eval(&self, input: i64) -> i64 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Gender` is never used
[INFO] [stdout]  --> src/modules/diff/diff_java.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Gender {
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/modules/diff/diff_java.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct Person {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/modules/diff/diff_java.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl Person {
[INFO] [stdout]    | ----------- associated function in this implementation
[INFO] [stdout] 33 |     // 构造函数
[INFO] [stdout] 34 |     fn new(name: String, gender: Gender) -> Person {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `diff_java_override_to_string` is never used
[INFO] [stdout]   --> src/modules/diff/diff_java.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn diff_java_override_to_string(name: String,gender: Gender) -> Person {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum` is never used
[INFO] [stdout]  --> src/modules/leetcode/_1_two_sum.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ListNode` is never constructed
[INFO] [stdout]  --> src/modules/leetcode/_2_two_add.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct ListNode {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout]  9 |     #[inline]
[INFO] [stdout] 10 |     pub fn new(val: i32) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two_numbers` is never used
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn add_two_numbers(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Logger` is never used
[INFO] [stdout]  --> src/modules/advance/log/mod.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub trait Logger: Send + Debug {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ConsoleLogger` is never constructed
[INFO] [stdout]  --> src/modules/advance/log/console_logger.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ConsoleLogger {
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FileLogger` is never constructed
[INFO] [stdout]  --> src/modules/advance/log/file_logger.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct FileLogger {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust_learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `LockResult`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_3_arc_1.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::{Arc, LockResult, Mutex};
[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::sync::Arc`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> src/modules/examples/fib_calc.rs:41:46
[INFO] [stdout]    |
[INFO] [stdout] 41 |     use crate::modules::examples::fib_calc::{self, Calculator};
[INFO] [stdout]    |                                              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/modules/examples/fib_calc.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 |         if (n <= 2) {
[INFO] [stdout]    |            ^      ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 44 -         if (n <= 2) {
[INFO] [stdout] 44 +         if n <= 2  {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/modules/base/smart_pointer/_2_drop_1.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let a = Person{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/modules/base/cloned.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let y = x.clone();          // i32 实现了 Copy，所以几乎零成本
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v2`
[INFO] [stdout]   --> src/modules/base/cloned.rs:15:13
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let v2: Vec<i32> = v.iter().cloned().collect();           // 得到 [1,2,3,4] 的拥有值副本
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v3`
[INFO] [stdout]   --> src/modules/base/cloned.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |         let v3: Vec<i32> = v.iter().map(|&x| x).collect();        // 因为 i32: Copy，所以 &i32 → i32 自动 copy
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v4`
[INFO] [stdout]   --> src/modules/base/cloned.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |         let v4: Vec<i32> = v.iter().map(|x| x.clone()).collect(); // 也能工作，但啰嗦
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `_2_two_add::ListNode` is more private than the item `_2_two_add::add_two_numbers`
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | / pub fn add_two_numbers(
[INFO] [stdout] 17 | |     l1: Option<Box<ListNode>>,
[INFO] [stdout] 18 | |     l2: Option<Box<ListNode>>,
[INFO] [stdout] 19 | | ) -> Option<Box<ListNode>> {
[INFO] [stdout]    | |__________________________^ function `_2_two_add::add_two_numbers` is reachable at visibility `pub(in crate::modules::leetcode)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `_2_two_add::ListNode` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/modules/leetcode/_2_two_add.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout]  3 | struct ListNode {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> src/modules/base/tuple.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Matrix(f32, f32, f32, f32);
[INFO] [stdout]    |        ------ ^^^  ^^^  ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `Matrix` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/modules/base/structure.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Unit` is never constructed
[INFO] [stdout]  --> src/modules/base/structure.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Unit;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/modules/base/structure.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Pair(i32, f32);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/modules/base/structure.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Point {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 17 |     x: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 18 |     y: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `structures_test` is never used
[INFO] [stdout]   --> src/modules/base/structure.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn structures_test() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/modules/base/trait_feature/derive.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Seconds(i32);
[INFO] [stdout]    |        ------- ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_condition` is never used
[INFO] [stdout]   --> src/modules/base/lifecycle/example_1.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn longest_with_condition<'a, 'b>(s1: &'a str, s2: &'b str, threshold: usize) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/modules/base/smart_pointer/_2_drop_1.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Person {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 2 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `country` is never read
[INFO] [stdout]  --> src/modules/base/smart_pointer/_5_cell_1.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Address {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 8 |     city: String,
[INFO] [stdout] 9 |     country: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Address` 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 `name` is never read
[INFO] [stdout]   --> src/modules/base/smart_pointer/_5_cell_1.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Person {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 14 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Person` 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 `name` is never read
[INFO] [stdout]  --> src/modules/examples/code_style.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) struct Person{
[INFO] [stdout]   |                   ------ field in this struct
[INFO] [stdout] 2 |     pub name: String
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Male` and `Other` are never constructed
[INFO] [stdout]   --> src/modules/diff/diff_java.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum Gender {
[INFO] [stdout]    |      ------ variants in this enum
[INFO] [stdout]  9 |     Male,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 10 |     Female,
[INFO] [stdout] 11 |     Other,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/modules/base/smart_pointer/_3_arc_1.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     handler.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let _ = handler.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.73s
[INFO] running `Command { std: "docker" "inspect" "1147f605fb6211a89b85940aa6e0dcfb12b8d469d0b57a4c7c3d7aa0ec921cab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1147f605fb6211a89b85940aa6e0dcfb12b8d469d0b57a4c7c3d7aa0ec921cab", kill_on_drop: false }`
[INFO] [stdout] 1147f605fb6211a89b85940aa6e0dcfb12b8d469d0b57a4c7c3d7aa0ec921cab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:cfa559dde23f44738f9990739aaa3487d8df3af37eb5df0572f7cf76004a604a" "/opt/rustwide/cargo-home/bin/cargo" "+d933cf483edf1605142ac6899ff32536c0ad8b22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ac9dd30f80d724becb6c863f032973f4bbf65c3cbf2f64e6b432d9ddb246df72
[INFO] running `Command { std: "docker" "start" "-a" "ac9dd30f80d724becb6c863f032973f4bbf65c3cbf2f64e6b432d9ddb246df72", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Arc`, `LockResult`, and `Mutex`
[INFO] [stderr]  --> src/modules/base/smart_pointer/_3_arc_1.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::sync::{Arc, LockResult, Mutex};
[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::thread`
[INFO] [stderr]  --> src/modules/base/smart_pointer/_3_arc_1.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `alloc::borrow::Cow`
[INFO] [stderr]  --> src/modules/base/smart_pointer/_4_cow_1.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use alloc::borrow::Cow;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::Arc`
[INFO] [stderr]  --> src/modules/base/smart_pointer/_5_cell_1.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::sync::Arc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::thread`
[INFO] [stderr]  --> src/modules/base/smart_pointer/_5_cell_1.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::thread;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/modules/base/smart_pointer/_2_drop_1.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let a = Person{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `ListNode` is more private than the item `add_two_numbers`
[INFO] [stderr]   --> src/modules/leetcode/_2_two_add.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | / pub fn add_two_numbers(
[INFO] [stderr] 17 | |     l1: Option<Box<ListNode>>,
[INFO] [stderr] 18 | |     l2: Option<Box<ListNode>>,
[INFO] [stderr] 19 | | ) -> Option<Box<ListNode>> {
[INFO] [stderr]    | |__________________________^ function `add_two_numbers` is reachable at visibility `pub(in crate::modules::leetcode)`
[INFO] [stderr]    |
[INFO] [stderr] note: but type `ListNode` is only usable at visibility `pub(self)`
[INFO] [stderr]   --> src/modules/leetcode/_2_two_add.rs:3:1
[INFO] [stderr]    |
[INFO] [stderr]  3 | struct ListNode {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stderr]   --> src/modules/base/tuple.rs:12:15
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct Matrix(f32, f32, f32, f32);
[INFO] [stderr]    |        ------ ^^^  ^^^  ^^^  ^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        fields in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing these fields
[INFO] [stderr]    = note: `Matrix` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]  --> src/modules/base/structure.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Person {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Unit` is never constructed
[INFO] [stderr]  --> src/modules/base/structure.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct Unit;
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pair` is never constructed
[INFO] [stderr]   --> src/modules/base/structure.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct Pair(i32, f32);
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `x` and `y` are never read
[INFO] [stderr]   --> src/modules/base/structure.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct Point {
[INFO] [stderr]    |        ----- fields in this struct
[INFO] [stderr] 17 |     x: f32,
[INFO] [stderr]    |     ^
[INFO] [stderr] 18 |     y: f32,
[INFO] [stderr]    |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: function `structures_test` is never used
[INFO] [stderr]   --> src/modules/base/structure.rs:29:4
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn structures_test() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Centimeters` is never constructed
[INFO] [stderr]  --> src/modules/base/trait_feature/derive.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Centimeters(f64);
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Inches` is never constructed
[INFO] [stderr]  --> src/modules/base/trait_feature/derive.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Inches(i32);
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `to_centimeters` is never used
[INFO] [stderr]   --> src/modules/base/trait_feature/derive.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr]  9 | impl Inches {
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] 10 |     fn to_centimeters(&self) -> Centimeters {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Seconds` is never constructed
[INFO] [stderr]   --> src/modules/base/trait_feature/derive.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Seconds(i32);
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `task` is never used
[INFO] [stderr]  --> src/modules/base/async_feature/simple_async.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 | async fn task() {
[INFO] [stderr]   |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `MyBox` is never constructed
[INFO] [stderr]  --> src/modules/base/smart_pointer/_1_defer_1.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct MyBox<T>(T);
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]  --> src/modules/base/smart_pointer/_2_drop_1.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Person {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_drop` is never used
[INFO] [stderr]   --> src/modules/base/smart_pointer/_2_drop_1.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn test_drop() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Address` is never constructed
[INFO] [stderr]  --> src/modules/base/smart_pointer/_5_cell_1.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Address {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]   --> src/modules/base/smart_pointer/_5_cell_1.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct Person {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `update_city` and `add_note` are never used
[INFO] [stderr]   --> src/modules/base/smart_pointer/_5_cell_1.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | impl Person {
[INFO] [stderr]    | ----------- methods in this implementation
[INFO] [stderr] 23 |     // 接收 &self，但内部仍然可以修改
[INFO] [stderr] 24 |     fn update_city(&self, new_city: &str) {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 32 |     fn add_note(&self, text: &str) {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]  --> src/modules/examples/code_style.rs:1:19
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub(crate) struct Person{
[INFO] [stderr]   |                   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]  --> src/modules/examples/code_style.rs:6:19
[INFO] [stderr]   |
[INFO] [stderr] 5 | impl Person {
[INFO] [stderr]   | ----------- associated function in this implementation
[INFO] [stderr] 6 |     pub(crate) fn new() -> Person {
[INFO] [stderr]   |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `f1` is never used
[INFO] [stderr]   --> src/modules/examples/code_style.rs:15:19
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl Person{
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] 15 |     pub(crate) fn f1(&self){
[INFO] [stderr]    |                   ^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `f2` is never used
[INFO] [stderr]   --> src/modules/examples/code_style.rs:21:19
[INFO] [stderr]    |
[INFO] [stderr] 20 | impl Person{
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] 21 |     pub(crate) fn f2(&self){
[INFO] [stderr]    |                   ^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Calculator` is never constructed
[INFO] [stderr]  --> src/modules/examples/fib_calc.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Calculator<'ctx> {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `eval` are never used
[INFO] [stderr]   --> src/modules/examples/fib_calc.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl<'ctx> Calculator<'ctx> {
[INFO] [stderr]    | --------------------------- associated items in this implementation
[INFO] [stderr] 12 |     pub fn new<F>(f: F) -> Self
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 |     pub fn eval(&self, input: i64) -> i64 {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Gender` is never used
[INFO] [stderr]  --> src/modules/diff/diff_java.rs:8:6
[INFO] [stderr]   |
[INFO] [stderr] 8 | enum Gender {
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]   --> src/modules/diff/diff_java.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | struct Person {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/modules/diff/diff_java.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | impl Person {
[INFO] [stderr]    | ----------- associated function in this implementation
[INFO] [stderr] 33 |     // 构造函数
[INFO] [stderr] 34 |     fn new(name: String, gender: Gender) -> Person {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `diff_java_override_to_string` is never used
[INFO] [stderr]   --> src/modules/diff/diff_java.rs:46:4
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn diff_java_override_to_string(name: String,gender: Gender) -> Person {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `two_sum` is never used
[INFO] [stderr]  --> src/modules/leetcode/_1_two_sum.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ListNode` is never constructed
[INFO] [stderr]  --> src/modules/leetcode/_2_two_add.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct ListNode {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/modules/leetcode/_2_two_add.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr]  8 | impl ListNode {
[INFO] [stderr]    | ------------- associated function in this implementation
[INFO] [stderr]  9 |     #[inline]
[INFO] [stderr] 10 |     pub fn new(val: i32) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_two_numbers` is never used
[INFO] [stderr]   --> src/modules/leetcode/_2_two_add.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn add_two_numbers(
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Logger` is never used
[INFO] [stderr]  --> src/modules/advance/log/mod.rs:9:11
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub trait Logger: Send + Debug {
[INFO] [stderr]   |           ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ConsoleLogger` is never constructed
[INFO] [stderr]  --> src/modules/advance/log/console_logger.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct ConsoleLogger {
[INFO] [stderr]   |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `FileLogger` is never constructed
[INFO] [stderr]  --> src/modules/advance/log/file_logger.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct FileLogger {
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `LockResult`
[INFO] [stderr]  --> src/modules/base/smart_pointer/_3_arc_1.rs:1:22
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::sync::{Arc, LockResult, Mutex};
[INFO] [stderr]   |                      ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self`
[INFO] [stderr]   --> src/modules/examples/fib_calc.rs:41:46
[INFO] [stderr]    |
[INFO] [stderr] 41 |     use crate::modules::examples::fib_calc::{self, Calculator};
[INFO] [stderr]    |                                              ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/modules/examples/fib_calc.rs:44:12
[INFO] [stderr]    |
[INFO] [stderr] 44 |         if (n <= 2) {
[INFO] [stderr]    |            ^      ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 44 -         if (n <= 2) {
[INFO] [stderr] 44 +         if n <= 2  {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/modules/base/cloned.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let y = x.clone();          // i32 实现了 Copy，所以几乎零成本
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v2`
[INFO] [stderr]   --> src/modules/base/cloned.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let v2: Vec<i32> = v.iter().cloned().collect();           // 得到 [1,2,3,4] 的拥有值副本
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v3`
[INFO] [stderr]   --> src/modules/base/cloned.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |         let v3: Vec<i32> = v.iter().map(|&x| x).collect();        // 因为 i32: Copy，所以 &i32 → i32 自动 copy
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v4`
[INFO] [stderr]   --> src/modules/base/cloned.rs:19:13
[INFO] [stderr]    |
[INFO] [stderr] 19 |         let v4: Vec<i32> = v.iter().map(|x| x.clone()).collect(); // 也能工作，但啰嗦
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_v4`
[INFO] [stderr] 
[INFO] [stderr] warning: type `_2_two_add::ListNode` is more private than the item `_2_two_add::add_two_numbers`
[INFO] [stderr]   --> src/modules/leetcode/_2_two_add.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | / pub fn add_two_numbers(
[INFO] [stderr] 17 | |     l1: Option<Box<ListNode>>,
[INFO] [stderr] 18 | |     l2: Option<Box<ListNode>>,
[INFO] [stderr] 19 | | ) -> Option<Box<ListNode>> {
[INFO] [stderr]    | |__________________________^ function `_2_two_add::add_two_numbers` is reachable at visibility `pub(in crate::modules::leetcode)`
[INFO] [stderr]    |
[INFO] [stderr] note: but type `_2_two_add::ListNode` is only usable at visibility `pub(self)`
[INFO] [stderr]   --> src/modules/leetcode/_2_two_add.rs:3:1
[INFO] [stderr]    |
[INFO] [stderr]  3 | struct ListNode {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/modules/base/trait_feature/derive.rs:18:16
[INFO] [stderr]    |
[INFO] [stderr] 18 | struct Seconds(i32);
[INFO] [stderr]    |        ------- ^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        field in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing this field
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest_with_condition` is never used
[INFO] [stderr]   --> src/modules/base/lifecycle/example_1.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn longest_with_condition<'a, 'b>(s1: &'a str, s2: &'b str, threshold: usize) -> &'a str {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `name` is never read
[INFO] [stderr]  --> src/modules/base/smart_pointer/_2_drop_1.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct Person {
[INFO] [stderr]   |        ------ field in this struct
[INFO] [stderr] 2 |     name: String,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `country` is never read
[INFO] [stderr]  --> src/modules/base/smart_pointer/_5_cell_1.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Address {
[INFO] [stderr]   |        ------- field in this struct
[INFO] [stderr] 8 |     city: String,
[INFO] [stderr] 9 |     country: String,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Address` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `name` is never read
[INFO] [stderr]   --> src/modules/base/smart_pointer/_5_cell_1.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct Person {
[INFO] [stderr]    |        ------ field in this struct
[INFO] [stderr] 14 |     name: String,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `name` is never read
[INFO] [stderr]  --> src/modules/examples/code_style.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub(crate) struct Person{
[INFO] [stderr]   |                   ------ field in this struct
[INFO] [stderr] 2 |     pub name: String
[INFO] [stderr]   |         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Male` and `Other` are never constructed
[INFO] [stderr]   --> src/modules/diff/diff_java.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr]  8 | enum Gender {
[INFO] [stderr]    |      ------ variants in this enum
[INFO] [stderr]  9 |     Male,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 10 |     Female,
[INFO] [stderr] 11 |     Other,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/modules/base/smart_pointer/_3_arc_1.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     handler.join();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let _ = handler.join();
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_learn` (lib) generated 41 warnings (run `cargo fix --lib -p rust_learn` to apply 6 suggestions)
[INFO] [stderr] warning: `rust_learn` (lib test) generated 25 warnings (9 duplicates) (run `cargo fix --lib -p rust_learn --tests` to apply 7 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.42s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_learn-d8f1a2cd2a051655)
[INFO] [stdout] 
[INFO] [stdout] running 19 tests
[INFO] [stdout] test modules::base::async_feature::semaphore_ep1::tests::t2 ... ok
[INFO] [stdout] test modules::base::lifecycle::example_1::tests::t2 ... ok
[INFO] [stdout] test modules::base::smart_pointer::_1_defer_1::defer_test_fn_1 ... ok
[INFO] [stdout] test modules::base::smart_pointer::_2_drop_1::it_works ... ok
[INFO] [stdout] test modules::base::lifecycle::example_1::tests::t1 ... ok
[INFO] [stdout] test modules::base::smart_pointer::_3_arc_1::example_1_mut ... ok
[INFO] [stdout] test modules::base::trait_feature::derive::tests::t1 ... ok
[INFO] [stdout] test modules::base::smart_pointer::_3_arc_1::example_1_un_mut ... ok
[INFO] [stdout] test modules::base::smart_pointer::_4_cow_1::cow_test1 ... ok
[INFO] [stdout] test modules::base::smart_pointer::_5_cell_1::test_refcell_meaningful ... ok
[INFO] [stdout] test modules::diff::diff_java::tests::t1 ... ok
[INFO] [stdout] test modules::examples::fib_calc::tests::it_works ... ok
[INFO] [stdout] test modules::leetcode::_1_two_sum::test ... ok
[INFO] [stdout] test modules::leetcode::_2_two_add::tests::test_add_two_numbers ... ok
[INFO] [stdout] test modules::advance::log::tests::test_console_logger_via_box ... ok
[INFO] [stdout] test modules::advance::log::tests::test_file_logger_via_box ... ok
[INFO] [stdout] test modules::base::cloned::tests::test_cloned ... ok
[INFO] [stdout] test modules::examples::code_style::t1 ... ok
[INFO] [stdout] test modules::base::async_feature::simple_async::tests::t1 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 19 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_learn-04629e816d59a52b)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running tests/base_tests.rs (/opt/rustwide/target/debug/deps/base_tests-f668086e58439371)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running tests/examples_tests.rs (/opt/rustwide/target/debug/deps/examples_tests-80795e851a4f4e08)
[INFO] [stdout] test test_array ... ok
[INFO] [stdout] test test_tuple ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] error: test failed, to rerun pass `--test examples_tests`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/examples_tests-80795e851a4f4e08` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "ac9dd30f80d724becb6c863f032973f4bbf65c3cbf2f64e6b432d9ddb246df72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac9dd30f80d724becb6c863f032973f4bbf65c3cbf2f64e6b432d9ddb246df72", kill_on_drop: false }`
[INFO] [stdout] ac9dd30f80d724becb6c863f032973f4bbf65c3cbf2f64e6b432d9ddb246df72