[INFO] fetching crate study-rust-example 0.1.0...
[INFO] testing study-rust-example-0.1.0 against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] extracting crate study-rust-example 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate study-rust-example 0.1.0
[INFO] finished tweaking crates.io crate study-rust-example 0.1.0
[INFO] tweaked toml for crates.io crate study-rust-example 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate study-rust-example 0.1.0 on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate study-rust-example 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98f789db74b2e05233ffd1bc2d03e30850fabd028b6331a0218f980a728a9f4d
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[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/basic_concept/basic_concept.rs:154:20
[INFO] [stdout]     |
[INFO] [stdout] 154 |         for num in (0..a1.len()) {
[INFO] [stdout]     |                    ^           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 154 -         for num in (0..a1.len()) {
[INFO] [stdout] 154 +         for num in 0..a1.len() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash_map`
[INFO] [stdout]  --> src/common_collection/hash_map_study.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{hash_map, HashMap};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `self`
[INFO] [stdout]  --> src/package_crate_module/package_crate_module.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]  --> src/package_crate_module/package_crate_module.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max64_int`
[INFO] [stdout]   --> src/basic_concept/basic_concept.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let max64_int = 2 ^ 64 - 1;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max64_int`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/basic_concept/basic_concept.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut x: u16 = 10000;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `vec1` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let mut vec1: Vec<i32> = Vec::new();
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `values`
[INFO] [stdout]   --> src/common_collection/vector_study.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let values: [i32; 3] = [12, 23, 43];
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let some_number = Some(5);
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_char`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let some_char = Some('S');
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let number: i32 = 32;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:119:23
[INFO] [stdout]     |
[INFO] [stdout] 119 |             Coin::ETH(str) => 100_0000_0000_0000_0000,
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |             Coin::USDT(str) => 100_0000,
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num1`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let num1: &i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num2`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let num2: &'a i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num3`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let num3: &'a mut i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let s: &'static str = "test 'static";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/iterator_closure/closure_study.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let s = example_closures(String::from("closures."));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut s1 = String::from("hello");
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |             let mut s4 = s3;
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut str = String::from("move_function_study hello");
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let mut int1 = 188;
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_ref`
[INFO] [stdout]    --> src/ownership/ownership.rs:121:19
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stdout]     |                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_ref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string_literal`
[INFO] [stdout]    --> src/ownership/ownership.rs:223:13
[INFO] [stdout]     |
[INFO] [stdout] 223 |         let string_literal = "hello string literal";
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_literal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ownership/ownership.rs:233:13
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let mut source_str = String::from("slice hello");
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let color = Color(32, 34, 43);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let point = Point(23, -23);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `decimal` is never read
[INFO] [stdout]   --> src/common_collection/hash_map_study.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct CoinProerty {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 11 |     decimal: u32,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CoinProerty` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     Int(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 55 -     Int(i32),
[INFO] [stdout] 55 +     Int(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:56:11
[INFO] [stdout]    |
[INFO] [stdout] 56 |     Float(f64),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 56 -     Float(f64),
[INFO] [stdout] 56 +     Float(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:57:10
[INFO] [stdout]    |
[INFO] [stdout] 57 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 57 -     Text(String),
[INFO] [stdout] 57 +     Text(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V6` is never constructed
[INFO] [stdout]  --> src/enum_pattern_match/enum_pattern_match.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     enum IpAddrType {
[INFO] [stdout]   |          ---------- variant in this enum
[INFO] [stdout] 4 |         V4,
[INFO] [stdout] 5 |         V6,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddrType` 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 `ip_addr_type` and `address` are never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  |     struct IpAddr {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 10 |         ip_addr_type: IpAddrType,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 11 |         address: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` 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 `0` is never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |         V4(String),
[INFO] [stdout]    |         -- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -         V4(String),
[INFO] [stdout] 16 +         V4(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V6` is never constructed
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     enum IpAddrEnum {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 16 |         V4(String),
[INFO] [stdout] 17 |         V6(String),
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     enum Message {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:49:15
[INFO] [stdout]    |
[INFO] [stdout] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout]    |         ----- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 49 -         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout] 49 +         Write(()),                 // 包括一个单个的字符串
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     enum Msg {
[INFO] [stdout]    |          --- variants in this enum
[INFO] [stdout] 47 |         Quit,                          // 没有数据关联
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 48 |         Move { x: i32, y: i32 },       // 像struct做的，有命名的字段
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout] 50 |         ChangeColor(i32, i64, String), // 包括几个类型的数据
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ETH` and `USDT` are never constructed
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |     enum Coin {
[INFO] [stdout]     |          ---- variants in this enum
[INFO] [stdout] 109 |         BTC(String),
[INFO] [stdout] 110 |         ETH(String),
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 111 |         USDT(String),
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Coin` 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 `call_panic_self` is never used
[INFO] [stdout]  --> src/error_handle/panic_unrecoverable.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn call_panic_self() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cause_lib_panic` is never used
[INFO] [stdout]  --> src/error_handle/panic_unrecoverable.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn cause_lib_panic() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Score` is never constructed
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Score<'a> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_score` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<'a> Score<'a> {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] 39 |     // [规则3]：因为参数之一是 &self ，所以返回类型获取 &self 的生命周期
[INFO] [stdout] 40 |     fn get_score(&self) -> &i32 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_world` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn first_world(str: &str) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]  --> src/generic_traits_lifetime/traits_study.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Pair<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/generic_traits_lifetime/traits_study.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl<T> Pair<T> {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 8 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/traits_study.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 13 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tweet` is never constructed
[INFO] [stdout]   --> src/generic_traits_lifetime/traits_study.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Tweet {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_closures_study` is never used
[INFO] [stdout]   --> src/iterator_closure/closure_study.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn example_closures_study() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]    --> src/iterator_closure/closure_study.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 114 | struct Rectangle {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 115 |     width: u32,
[INFO] [stdout] 116 |     height: u32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]   --> src/iterator_closure/iterator_process_study.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Shoe {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoe_in_size` is never used
[INFO] [stdout]   --> src/iterator_closure/iterator_process_study.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn shoe_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `modify_str` is never used
[INFO] [stdout]    --> src/ownership/ownership.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `user_id`, `age`, and `active` are never read
[INFO] [stdout]  --> src/struct_related/define_init_struct.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 3 |     user_id: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     user_name: String,
[INFO] [stdout] 5 |     age: u8,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` 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 `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:25:14
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Point(i32, i32);
[INFO] [stdout]    |        ----- ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `coinMap` should have a snake case name
[INFO] [stdout]   --> src/common_collection/hash_map_study.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut coinMap: HashMap<CoinEnum, CoinProerty> = HashMap::new();
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `coin_map`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess_game` is never used
[INFO] [stdout]  --> src/main.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn guess_game() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `socket`
[INFO] [stdout]   --> src/bin/socket_server.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         Ok((socket, addr)) => println!("Got a client: {addr:?}"),
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_socket`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 56s
[INFO] running `Command { std: "docker" "inspect" "aefe868fbe3d9ed61075c9802083dfcca791426e80ac430054d48c5ccebf3565", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aefe868fbe3d9ed61075c9802083dfcca791426e80ac430054d48c5ccebf3565", kill_on_drop: false }`
[INFO] [stdout] aefe868fbe3d9ed61075c9802083dfcca791426e80ac430054d48c5ccebf3565
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 11420f3bc607931f7baf3678e0879da155fd56649d017f22e6b72214c66c5e1f
[INFO] running `Command { std: "docker" "start" "-a" "11420f3bc607931f7baf3678e0879da155fd56649d017f22e6b72214c66c5e1f", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/basic_concept/basic_concept.rs:154:20
[INFO] [stdout]     |
[INFO] [stdout] 154 |         for num in (0..a1.len()) {
[INFO] [stdout]     |                    ^           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 154 -         for num in (0..a1.len()) {
[INFO] [stdout] 154 +         for num in 0..a1.len() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash_map`
[INFO] [stdout]  --> src/common_collection/hash_map_study.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{hash_map, HashMap};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `self`
[INFO] [stdout]  --> src/package_crate_module/package_crate_module.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]  --> src/package_crate_module/package_crate_module.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max64_int`
[INFO] [stdout]   --> src/basic_concept/basic_concept.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let max64_int = 2 ^ 64 - 1;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max64_int`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/basic_concept/basic_concept.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut x: u16 = 10000;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `vec1` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let mut vec1: Vec<i32> = Vec::new();
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `values`
[INFO] [stdout]   --> src/common_collection/vector_study.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let values: [i32; 3] = [12, 23, 43];
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let some_number = Some(5);
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_char`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let some_char = Some('S');
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let number: i32 = 32;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:119:23
[INFO] [stdout]     |
[INFO] [stdout] 119 |             Coin::ETH(str) => 100_0000_0000_0000_0000,
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |             Coin::USDT(str) => 100_0000,
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num1`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let num1: &i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num2`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let num2: &'a i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num3`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let num3: &'a mut i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let s: &'static str = "test 'static";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/iterator_closure/closure_study.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let s = example_closures(String::from("closures."));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut s1 = String::from("hello");
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |             let mut s4 = s3;
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut str = String::from("move_function_study hello");
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let mut int1 = 188;
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_ref`
[INFO] [stdout]    --> src/ownership/ownership.rs:121:19
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stdout]     |                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_ref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string_literal`
[INFO] [stdout]    --> src/ownership/ownership.rs:223:13
[INFO] [stdout]     |
[INFO] [stdout] 223 |         let string_literal = "hello string literal";
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_literal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ownership/ownership.rs:233:13
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let mut source_str = String::from("slice hello");
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let color = Color(32, 34, 43);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let point = Point(23, -23);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `decimal` is never read
[INFO] [stdout]   --> src/common_collection/hash_map_study.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct CoinProerty {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 11 |     decimal: u32,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CoinProerty` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     Int(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 55 -     Int(i32),
[INFO] [stdout] 55 +     Int(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:56:11
[INFO] [stdout]    |
[INFO] [stdout] 56 |     Float(f64),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 56 -     Float(f64),
[INFO] [stdout] 56 +     Float(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:57:10
[INFO] [stdout]    |
[INFO] [stdout] 57 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 57 -     Text(String),
[INFO] [stdout] 57 +     Text(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V6` is never constructed
[INFO] [stdout]  --> src/enum_pattern_match/enum_pattern_match.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     enum IpAddrType {
[INFO] [stdout]   |          ---------- variant in this enum
[INFO] [stdout] 4 |         V4,
[INFO] [stdout] 5 |         V6,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddrType` 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 `ip_addr_type` and `address` are never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  |     struct IpAddr {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 10 |         ip_addr_type: IpAddrType,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 11 |         address: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` 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 `0` is never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |         V4(String),
[INFO] [stdout]    |         -- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -         V4(String),
[INFO] [stdout] 16 +         V4(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V6` is never constructed
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     enum IpAddrEnum {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 16 |         V4(String),
[INFO] [stdout] 17 |         V6(String),
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     enum Message {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:49:15
[INFO] [stdout]    |
[INFO] [stdout] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout]    |         ----- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 49 -         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout] 49 +         Write(()),                 // 包括一个单个的字符串
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     enum Msg {
[INFO] [stdout]    |          --- variants in this enum
[INFO] [stdout] 47 |         Quit,                          // 没有数据关联
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 48 |         Move { x: i32, y: i32 },       // 像struct做的，有命名的字段
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout] 50 |         ChangeColor(i32, i64, String), // 包括几个类型的数据
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ETH` and `USDT` are never constructed
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |     enum Coin {
[INFO] [stdout]     |          ---- variants in this enum
[INFO] [stdout] 109 |         BTC(String),
[INFO] [stdout] 110 |         ETH(String),
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 111 |         USDT(String),
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Coin` 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 `call_panic_self` is never used
[INFO] [stdout]  --> src/error_handle/panic_unrecoverable.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn call_panic_self() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cause_lib_panic` is never used
[INFO] [stdout]  --> src/error_handle/panic_unrecoverable.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn cause_lib_panic() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Score` is never constructed
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Score<'a> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_score` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<'a> Score<'a> {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] 39 |     // [规则3]：因为参数之一是 &self ，所以返回类型获取 &self 的生命周期
[INFO] [stdout] 40 |     fn get_score(&self) -> &i32 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_world` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn first_world(str: &str) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]  --> src/generic_traits_lifetime/traits_study.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Pair<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/generic_traits_lifetime/traits_study.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl<T> Pair<T> {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 8 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/traits_study.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 13 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tweet` is never constructed
[INFO] [stdout]   --> src/generic_traits_lifetime/traits_study.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Tweet {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_closures_study` is never used
[INFO] [stdout]   --> src/iterator_closure/closure_study.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn example_closures_study() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]    --> src/iterator_closure/closure_study.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 114 | struct Rectangle {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 115 |     width: u32,
[INFO] [stdout] 116 |     height: u32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]   --> src/iterator_closure/iterator_process_study.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | struct Shoe {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoe_in_size` is never used
[INFO] [stdout]   --> src/iterator_closure/iterator_process_study.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn shoe_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling study-rust-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `modify_str` is never used
[INFO] [stdout]    --> src/ownership/ownership.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `user_id`, `age`, and `active` are never read
[INFO] [stdout]  --> src/struct_related/define_init_struct.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 3 |     user_id: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     user_name: String,
[INFO] [stdout] 5 |     age: u8,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` 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 `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:25:14
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Point(i32, i32);
[INFO] [stdout]    |        ----- ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `coinMap` should have a snake case name
[INFO] [stdout]   --> src/common_collection/hash_map_study.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut coinMap: HashMap<CoinEnum, CoinProerty> = HashMap::new();
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `coin_map`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `socket`
[INFO] [stdout]   --> src/bin/socket_server.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         Ok((socket, addr)) => println!("Got a client: {addr:?}"),
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_socket`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]    --> src/basic_concept/basic_concept.rs:154:20
[INFO] [stdout]     |
[INFO] [stdout] 154 |         for num in (0..a1.len()) {
[INFO] [stdout]     |                    ^           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 154 -         for num in (0..a1.len()) {
[INFO] [stdout] 154 +         for num in 0..a1.len() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash_map`
[INFO] [stdout]  --> src/common_collection/hash_map_study.rs:1:24
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::{hash_map, HashMap};
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `self`
[INFO] [stdout]  --> src/package_crate_module/package_crate_module.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]  --> src/package_crate_module/package_crate_module.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `guess_game` is never used
[INFO] [stdout]  --> src/main.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn guess_game() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max64_int`
[INFO] [stdout]   --> src/basic_concept/basic_concept.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let max64_int = 2 ^ 64 - 1;
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max64_int`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> src/basic_concept/basic_concept.rs:59:17
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut x: u16 = 10000;
[INFO] [stdout]    |                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `vec1` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:72:13
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let mut vec1: Vec<i32> = Vec::new();
[INFO] [stdout]    |             ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `values`
[INFO] [stdout]   --> src/common_collection/vector_study.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let values: [i32; 3] = [12, 23, 43];
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:78:13
[INFO] [stdout]    |
[INFO] [stdout] 78 |         let some_number = Some(5);
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_char`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:79:13
[INFO] [stdout]    |
[INFO] [stdout] 79 |         let some_char = Some('S');
[INFO] [stdout]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |         let number: i32 = 32;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:119:23
[INFO] [stdout]     |
[INFO] [stdout] 119 |             Coin::ETH(str) => 100_0000_0000_0000_0000,
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |             Coin::USDT(str) => 100_0000,
[INFO] [stdout]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num1`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let num1: &i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num2`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let num2: &'a i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num3`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let num3: &'a mut i32;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let s: &'static str = "test 'static";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/iterator_closure/closure_study.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let s = example_closures(String::from("closures."));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |         let mut s1 = String::from("hello");
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |             let mut s4 = s3;
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let mut str = String::from("move_function_study hello");
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership/ownership.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let mut int1 = 188;
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str_ref`
[INFO] [stdout]    --> src/ownership/ownership.rs:121:19
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stdout]     |                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_ref`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string_literal`
[INFO] [stdout]    --> src/ownership/ownership.rs:223:13
[INFO] [stdout]     |
[INFO] [stdout] 223 |         let string_literal = "hello string literal";
[INFO] [stdout]     |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_literal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ownership/ownership.rs:233:13
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let mut source_str = String::from("slice hello");
[INFO] [stdout]     |             ----^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let color = Color(32, 34, 43);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let point = Point(23, -23);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `decimal` is never read
[INFO] [stdout]   --> src/common_collection/hash_map_study.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct CoinProerty {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 11 |     decimal: u32,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CoinProerty` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     Int(i32),
[INFO] [stdout]    |     --- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 55 -     Int(i32),
[INFO] [stdout] 55 +     Int(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:56:11
[INFO] [stdout]    |
[INFO] [stdout] 56 |     Float(f64),
[INFO] [stdout]    |     ----- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 56 -     Float(f64),
[INFO] [stdout] 56 +     Float(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/common_collection/vector_study.rs:57:10
[INFO] [stdout]    |
[INFO] [stdout] 57 |     Text(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 57 -     Text(String),
[INFO] [stdout] 57 +     Text(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V6` is never constructed
[INFO] [stdout]  --> src/enum_pattern_match/enum_pattern_match.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     enum IpAddrType {
[INFO] [stdout]   |          ---------- variant in this enum
[INFO] [stdout] 4 |         V4,
[INFO] [stdout] 5 |         V6,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddrType` 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 `ip_addr_type` and `address` are never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  |     struct IpAddr {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 10 |         ip_addr_type: IpAddrType,
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 11 |         address: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` 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 `0` is never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |         V4(String),
[INFO] [stdout]    |         -- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -         V4(String),
[INFO] [stdout] 16 +         V4(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V6` is never constructed
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     enum IpAddrEnum {
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 16 |         V4(String),
[INFO] [stdout] 17 |         V6(String),
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     enum Message {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:49:15
[INFO] [stdout]    |
[INFO] [stdout] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout]    |         ----- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 49 -         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout] 49 +         Write(()),                 // 包括一个单个的字符串
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]   --> src/enum_pattern_match/enum_pattern_match.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     enum Msg {
[INFO] [stdout]    |          --- variants in this enum
[INFO] [stdout] 47 |         Quit,                          // 没有数据关联
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 48 |         Move { x: i32, y: i32 },       // 像struct做的，有命名的字段
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stdout] 50 |         ChangeColor(i32, i64, String), // 包括几个类型的数据
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `ETH` and `USDT` are never constructed
[INFO] [stdout]    --> src/enum_pattern_match/enum_pattern_match.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 108 |     enum Coin {
[INFO] [stdout]     |          ---- variants in this enum
[INFO] [stdout] 109 |         BTC(String),
[INFO] [stdout] 110 |         ETH(String),
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 111 |         USDT(String),
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Coin` 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 `call_panic_self` is never used
[INFO] [stdout]  --> src/error_handle/panic_unrecoverable.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn call_panic_self() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cause_lib_panic` is never used
[INFO] [stdout]  --> src/error_handle/panic_unrecoverable.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn cause_lib_panic() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Score` is never constructed
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Score<'a> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_score` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | impl<'a> Score<'a> {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] 39 |     // [规则3]：因为参数之一是 &self ，所以返回类型获取 &self 的生命周期
[INFO] [stdout] 40 |     fn get_score(&self) -> &i32 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_world` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/lifetime_study.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn first_world(str: &str) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]  --> src/generic_traits_lifetime/traits_study.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Pair<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/generic_traits_lifetime/traits_study.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl<T> Pair<T> {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 8 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/generic_traits_lifetime/traits_study.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 13 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tweet` is never constructed
[INFO] [stdout]   --> src/generic_traits_lifetime/traits_study.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Tweet {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `example_closures_study` is never used
[INFO] [stdout]   --> src/iterator_closure/closure_study.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn example_closures_study() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]    --> src/iterator_closure/closure_study.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 114 | struct Rectangle {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 115 |     width: u32,
[INFO] [stdout] 116 |     height: u32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Rectangle` 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 `modify_str` is never used
[INFO] [stdout]    --> src/ownership/ownership.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `user_id`, `age`, and `active` are never read
[INFO] [stdout]  --> src/struct_related/define_init_struct.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 3 |     user_id: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     user_name: String,
[INFO] [stdout] 5 |     age: u8,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` 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 `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:25:14
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/struct_related/define_init_struct.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 | struct Point(i32, i32);
[INFO] [stdout]    |        ----- ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `coinMap` should have a snake case name
[INFO] [stdout]   --> src/common_collection/hash_map_study.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut coinMap: HashMap<CoinEnum, CoinProerty> = HashMap::new();
[INFO] [stdout]    |             ^^^^^^^ help: convert the identifier to snake case: `coin_map`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "11420f3bc607931f7baf3678e0879da155fd56649d017f22e6b72214c66c5e1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11420f3bc607931f7baf3678e0879da155fd56649d017f22e6b72214c66c5e1f", kill_on_drop: false }`
[INFO] [stdout] 11420f3bc607931f7baf3678e0879da155fd56649d017f22e6b72214c66c5e1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bb8b134b8c3274583cfc97afe5a8f669fbca65810e094a13470ede8092b04499
[INFO] running `Command { std: "docker" "start" "-a" "bb8b134b8c3274583cfc97afe5a8f669fbca65810e094a13470ede8092b04499", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stderr]    --> src/basic_concept/basic_concept.rs:154:20
[INFO] [stderr]     |
[INFO] [stderr] 154 |         for num in (0..a1.len()) {
[INFO] [stderr]     |                    ^           ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 154 -         for num in (0..a1.len()) {
[INFO] [stderr] 154 +         for num in 0..a1.len() {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `hash_map`
[INFO] [stderr]  --> src/common_collection/hash_map_study.rs:1:24
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::{hash_map, HashMap};
[INFO] [stderr]   |                        ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Write` and `self`
[INFO] [stderr]  --> src/package_crate_module/package_crate_module.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{self, Write};
[INFO] [stderr]   |               ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::*`
[INFO] [stderr]  --> src/package_crate_module/package_crate_module.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::collections::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `max64_int`
[INFO] [stderr]   --> src/basic_concept/basic_concept.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let max64_int = 2 ^ 64 - 1;
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max64_int`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> src/basic_concept/basic_concept.rs:59:17
[INFO] [stderr]    |
[INFO] [stderr] 59 |         let mut x: u16 = 10000;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `vec1` is never read
[INFO] [stderr]   --> src/common_collection/vector_study.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |     let mut vec1: Vec<i32> = Vec::new();
[INFO] [stderr]    |             ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `values`
[INFO] [stderr]   --> src/common_collection/vector_study.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let values: [i32; 3] = [12, 23, 43];
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_number`
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:78:13
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let some_number = Some(5);
[INFO] [stderr]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_char`
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:79:13
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let some_char = Some('S');
[INFO] [stderr]    |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `number`
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |         let number: i32 = 32;
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]    --> src/enum_pattern_match/enum_pattern_match.rs:119:23
[INFO] [stderr]     |
[INFO] [stderr] 119 |             Coin::ETH(str) => 100_0000_0000_0000_0000,
[INFO] [stderr]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]    --> src/enum_pattern_match/enum_pattern_match.rs:120:24
[INFO] [stderr]     |
[INFO] [stderr] 120 |             Coin::USDT(str) => 100_0000,
[INFO] [stderr]     |                        ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num1`
[INFO] [stderr]   --> src/generic_traits_lifetime/lifetime_study.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let num1: &i32;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num2`
[INFO] [stderr]   --> src/generic_traits_lifetime/lifetime_study.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let num2: &'a i32;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num3`
[INFO] [stderr]   --> src/generic_traits_lifetime/lifetime_study.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |     let num3: &'a mut i32;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/generic_traits_lifetime/lifetime_study.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let s: &'static str = "test 'static";
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/iterator_closure/closure_study.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let s = example_closures(String::from("closures."));
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ownership/ownership.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |         let mut s1 = String::from("hello");
[INFO] [stderr]    |             ----^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ownership/ownership.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 55 |             let mut s4 = s3;
[INFO] [stderr]    |                 ----^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ownership/ownership.rs:69:13
[INFO] [stderr]    |
[INFO] [stderr] 69 |         let mut str = String::from("move_function_study hello");
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/ownership/ownership.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let mut int1 = 188;
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str_ref`
[INFO] [stderr]    --> src/ownership/ownership.rs:121:19
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stderr]     |                   ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_ref`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `string_literal`
[INFO] [stderr]    --> src/ownership/ownership.rs:223:13
[INFO] [stderr]     |
[INFO] [stderr] 223 |         let string_literal = "hello string literal";
[INFO] [stderr]     |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_string_literal`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ownership/ownership.rs:233:13
[INFO] [stderr]     |
[INFO] [stderr] 233 |         let mut source_str = String::from("slice hello");
[INFO] [stderr]     |             ----^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `color`
[INFO] [stderr]   --> src/struct_related/define_init_struct.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let color = Color(32, 34, 43);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `point`
[INFO] [stderr]   --> src/struct_related/define_init_struct.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let point = Point(23, -23);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stderr] 
[INFO] [stderr] warning: field `decimal` is never read
[INFO] [stderr]   --> src/common_collection/hash_map_study.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct CoinProerty {
[INFO] [stderr]    |        ----------- field in this struct
[INFO] [stderr] 11 |     decimal: u32,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `CoinProerty` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/common_collection/vector_study.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     Int(i32),
[INFO] [stderr]    |     --- ^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 55 -     Int(i32),
[INFO] [stderr] 55 +     Int(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/common_collection/vector_study.rs:56:11
[INFO] [stderr]    |
[INFO] [stderr] 56 |     Float(f64),
[INFO] [stderr]    |     ----- ^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 56 -     Float(f64),
[INFO] [stderr] 56 +     Float(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/common_collection/vector_study.rs:57:10
[INFO] [stderr]    |
[INFO] [stderr] 57 |     Text(String),
[INFO] [stderr]    |     ---- ^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `SpreadsheetCell` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 57 -     Text(String),
[INFO] [stderr] 57 +     Text(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: variant `V6` is never constructed
[INFO] [stderr]  --> src/enum_pattern_match/enum_pattern_match.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     enum IpAddrType {
[INFO] [stderr]   |          ---------- variant in this enum
[INFO] [stderr] 4 |         V4,
[INFO] [stderr] 5 |         V6,
[INFO] [stderr]   |         ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `IpAddrType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `ip_addr_type` and `address` are never read
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 9  |     struct IpAddr {
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] 10 |         ip_addr_type: IpAddrType,
[INFO] [stderr]    |         ^^^^^^^^^^^^
[INFO] [stderr] 11 |         address: String,
[INFO] [stderr]    |         ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 |         V4(String),
[INFO] [stderr]    |         -- ^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 16 -         V4(String),
[INFO] [stderr] 16 +         V4(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: variant `V6` is never constructed
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     enum IpAddrEnum {
[INFO] [stderr]    |          ---------- variant in this enum
[INFO] [stderr] 16 |         V4(String),
[INFO] [stderr] 17 |         V6(String),
[INFO] [stderr]    |         ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `IpAddrEnum` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Message` is never used
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 |     enum Message {
[INFO] [stderr]    |          ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:49:15
[INFO] [stderr]    |
[INFO] [stderr] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stderr]    |         ----- ^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 49 -         Write(String),                 // 包括一个单个的字符串
[INFO] [stderr] 49 +         Write(()),                 // 包括一个单个的字符串
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stderr]   --> src/enum_pattern_match/enum_pattern_match.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     enum Msg {
[INFO] [stderr]    |          --- variants in this enum
[INFO] [stderr] 47 |         Quit,                          // 没有数据关联
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 48 |         Move { x: i32, y: i32 },       // 像struct做的，有命名的字段
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 49 |         Write(String),                 // 包括一个单个的字符串
[INFO] [stderr] 50 |         ChangeColor(i32, i64, String), // 包括几个类型的数据
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Msg` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `ETH` and `USDT` are never constructed
[INFO] [stderr]    --> src/enum_pattern_match/enum_pattern_match.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 108 |     enum Coin {
[INFO] [stderr]     |          ---- variants in this enum
[INFO] [stderr] 109 |         BTC(String),
[INFO] [stderr] 110 |         ETH(String),
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 111 |         USDT(String),
[INFO] [stderr]     |         ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `call_panic_self` is never used
[INFO] [stderr]  --> src/error_handle/panic_unrecoverable.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn call_panic_self() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `cause_lib_panic` is never used
[INFO] [stderr]  --> src/error_handle/panic_unrecoverable.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn cause_lib_panic() {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Score` is never constructed
[INFO] [stderr]   --> src/generic_traits_lifetime/lifetime_study.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | struct Score<'a> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_score` is never used
[INFO] [stderr]   --> src/generic_traits_lifetime/lifetime_study.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | impl<'a> Score<'a> {
[INFO] [stderr]    | ------------------ method in this implementation
[INFO] [stderr] 39 |     // [规则3]：因为参数之一是 &self ，所以返回类型获取 &self 的生命周期
[INFO] [stderr] 40 |     fn get_score(&self) -> &i32 {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_world` is never used
[INFO] [stderr]   --> src/generic_traits_lifetime/lifetime_study.rs:46:4
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn first_world(str: &str) -> &str {
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pair` is never constructed
[INFO] [stderr]  --> src/generic_traits_lifetime/traits_study.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Pair<T> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]  --> src/generic_traits_lifetime/traits_study.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | impl<T> Pair<T> {
[INFO] [stderr]   | --------------- associated function in this implementation
[INFO] [stderr] 8 |     fn new(x: T, y: T) -> Self {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]   --> src/generic_traits_lifetime/traits_study.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stderr]    | ------------------------------------- method in this implementation
[INFO] [stderr] 13 |     fn cmp_display(&self) {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Tweet` is never constructed
[INFO] [stderr]   --> src/generic_traits_lifetime/traits_study.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct Tweet {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `example_closures_study` is never used
[INFO] [stderr]   --> src/iterator_closure/closure_study.rs:64:4
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn example_closures_study() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `height` is never read
[INFO] [stderr]    --> src/iterator_closure/closure_study.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 114 | struct Rectangle {
[INFO] [stderr]     |        --------- field in this struct
[INFO] [stderr] 115 |     width: u32,
[INFO] [stderr] 116 |     height: u32,
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Shoe` is never constructed
[INFO] [stderr]   --> src/iterator_closure/iterator_process_study.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | struct Shoe {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `shoe_in_size` is never used
[INFO] [stderr]   --> src/iterator_closure/iterator_process_study.rs:53:4
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn shoe_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `modify_str` is never used
[INFO] [stderr]    --> src/ownership/ownership.rs:121:8
[INFO] [stderr]     |
[INFO] [stderr] 121 |     fn modify_str(str_ref: &String) {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `user_id`, `age`, and `active` are never read
[INFO] [stderr]  --> src/struct_related/define_init_struct.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct User {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 3 |     user_id: String,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 4 |     user_name: String,
[INFO] [stderr] 5 |     age: u8,
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 6 |     active: bool,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0`, `1`, and `2` are never read
[INFO] [stderr]   --> src/struct_related/define_init_struct.rs:25:14
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct Color(i32, i32, i32);
[INFO] [stderr]    |        ----- ^^^  ^^^  ^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        fields in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing these fields
[INFO] [stderr] 
[INFO] [stderr] warning: fields `0` and `1` are never read
[INFO] [stderr]   --> src/struct_related/define_init_struct.rs:26:14
[INFO] [stderr]    |
[INFO] [stderr] 26 | struct Point(i32, i32);
[INFO] [stderr]    |        ----- ^^^  ^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        fields in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing these fields
[INFO] [stderr] 
[INFO] [stderr] warning: variable `coinMap` should have a snake case name
[INFO] [stderr]   --> src/common_collection/hash_map_study.rs:33:13
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let mut coinMap: HashMap<CoinEnum, CoinProerty> = HashMap::new();
[INFO] [stderr]    |             ^^^^^^^ help: convert the identifier to snake case: `coin_map`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `study-rust-example` (lib) generated 57 warnings (run `cargo fix --lib -p study-rust-example` to apply 9 suggestions)
[INFO] [stderr] warning: `study-rust-example` (lib test) generated 55 warnings (55 duplicates)
[INFO] [stderr] warning: function `guess_game` is never used
[INFO] [stderr]  --> src/main.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn guess_game() {
[INFO] [stderr]   |    ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `socket`
[INFO] [stderr]   --> src/bin/socket_server.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         Ok((socket, addr)) => println!("Got a client: {addr:?}"),
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_socket`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `study-rust-example` (bin "study-rust-example" test) generated 1 warning
[INFO] [stderr] warning: `study-rust-example` (bin "socket_server" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/study_rust_example-c8f0f9d0a19e9339)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test generic_traits_lifetime::test_study::longer_str_with_announcement_test ... ok
[INFO] [stdout] test generic_traits_lifetime::test_study::result_generic_test ... ok
[INFO] [stdout] test generic_traits_lifetime::test_study::not_equal_test ... ok
[INFO] [stdout] test iterator_closure::iterator_process_study::tests::test_iterator_demo ... ok
[INFO] [stdout] test iterator_closure::iterator_process_study::tests::test_shoe_in_size ... ok
[INFO] [stdout] test generic_traits_lifetime::test_study::should_panic_test - should panic ... ok
[INFO] [stdout] test generic_traits_lifetime::test_study::assert_test ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- generic_traits_lifetime::test_study::assert_test stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'generic_traits_lifetime::test_study::assert_test' panicked at src/generic_traits_lifetime/test_study.rs:22:5:
[INFO] [stdout] test method did not contain name, value was hello Tracking
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x597125e92292 - std::backtrace_rs::backtrace::libunwind::trace::hd39b1f53d3cf9745
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x597125e92292 - std::backtrace_rs::backtrace::trace_unsynchronized::he91d9a75d4e3972b
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x597125e92292 - std::sys::backtrace::_print_fmt::hca46938f8c6e22cf
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x597125e92292 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha499add612cccf8e
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x597125eb7323 - core::fmt::rt::Argument::fmt::hd21145b75a833b7a
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x597125eb7323 - core::fmt::write::hb10c956f5235c8a4
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/fmt/mod.rs:1465:25
[INFO] [stdout]    6:     0x597125e8f473 - std::io::default_write_fmt::hdb7615052be2ba4d
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x597125e8f473 - std::io::Write::write_fmt::he1bcd251ec6e4153
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x597125e920e2 - std::sys::backtrace::BacktraceLock::print::hb47c770ef659fd10
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x597125e937fc - std::panicking::default_hook::{{closure}}::hdda8afb9d457a22c
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x597125e93652 - std::panicking::default_hook::h7c46b44874fe5c9a
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x597125e5b734 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h178a5fcedee41e2f
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x597125e5b734 - test::test_main_with_exit_callback::{{closure}}::h951a41e0149d6d5d
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x597125e941db - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h13602080f5b63276
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x597125e941db - std::panicking::rust_panic_with_hook::ha6cb99ed099eb1c5
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x597125e93faa - std::panicking::begin_panic_handler::{{closure}}::he11808bc797ee921
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x597125e92789 - std::sys::backtrace::__rust_end_short_backtrace::h9418807cb7346258
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x597125e93c3d - __rustc[18fb429eef004894]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x597125eb5ea0 - core::panicking::panic_fmt::hd890aeb12c3a3fc3
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x597125e217d1 - study_rust_example::generic_traits_lifetime::test_study::assert_test::h3a0499ab73d63d80
[INFO] [stdout]                                at /opt/rustwide/workdir/src/generic_traits_lifetime/test_study.rs:22:5
[INFO] [stdout]   20:     0x597125e21de9 - study_rust_example::generic_traits_lifetime::test_study::assert_test::{{closure}}::hdbbf96033cc7c6ee
[INFO] [stdout]                                at /opt/rustwide/workdir/src/generic_traits_lifetime/test_study.rs:18:17
[INFO] [stdout]   21:     0x597125e21de9 - core::ops::function::FnOnce::call_once::hd6ec1ee03e939d07
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x597125e60ebb - core::ops::function::FnOnce::call_once::h2869fb5b0a2b0bdc
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x597125e60ebb - test::__rust_begin_short_backtrace::h7dd7142bd62fa711
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/test/src/lib.rs:648:18
[INFO] [stdout]   24:     0x597125e600ae - test::run_test_in_process::{{closure}}::h43a753f038d36b3f
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/test/src/lib.rs:671:74
[INFO] [stdout]   25:     0x597125e600ae - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0ca95dd3e12d1e16
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x597125e600ae - std::panicking::catch_unwind::do_call::he308587d70ac34ba
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:589:40
[INFO] [stdout]   27:     0x597125e600ae - std::panicking::catch_unwind::h30dcba31973e8fb0
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:552:19
[INFO] [stdout]   28:     0x597125e600ae - std::panic::catch_unwind::hfb68364e5621fbee
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panic.rs:359:14
[INFO] [stdout]   29:     0x597125e600ae - test::run_test_in_process::hcdcc2977903b998a
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/test/src/lib.rs:671:27
[INFO] [stdout]   30:     0x597125e600ae - test::run_test::{{closure}}::h544a6550958c5d14
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/test/src/lib.rs:592:43
[INFO] [stdout]   31:     0x597125e23c24 - test::run_test::{{closure}}::hb172e48ebe2b92c7
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/test/src/lib.rs:622:41
[INFO] [stdout]   32:     0x597125e23c24 - std::sys::backtrace::__rust_begin_short_backtrace::h7e79d8706638bea0
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   33:     0x597125e275fa - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::hc4a275f1e71b8ab0
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   34:     0x597125e275fa - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h01ed0d242df78cfd
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x597125e275fa - std::panicking::catch_unwind::do_call::h052f373fb905fee0
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:589:40
[INFO] [stdout]   36:     0x597125e275fa - std::panicking::catch_unwind::hb425d20c8ffb09c8
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panicking.rs:552:19
[INFO] [stdout]   37:     0x597125e275fa - std::panic::catch_unwind::ha0d5dfbf18fdeda5
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/panic.rs:359:14
[INFO] [stdout]   38:     0x597125e275fa - std::thread::Builder::spawn_unchecked_::{{closure}}::hbe79182bd37949c7
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   39:     0x597125e275fa - core::ops::function::FnOnce::call_once{{vtable.shim}}::hc096c4a06972fde5
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x597125e97137 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h47377e27fb938a26
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   41:     0x597125e97137 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h72f1fe5d095abf57
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   42:     0x597125e97137 - std::sys::pal::unix::thread::Thread::new::thread_start::h0a4d8e1b9c0d38cf
[INFO] [stdout]                                at /rustc/d98a5da813da67eb189387b8ccfb73cf481275d8/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   43:     0x78b2c521aaa4 - <unknown>
[INFO] [stdout]   44:     0x78b2c52a7a34 - clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     generic_traits_lifetime::test_study::assert_test
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 6 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "bb8b134b8c3274583cfc97afe5a8f669fbca65810e094a13470ede8092b04499", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb8b134b8c3274583cfc97afe5a8f669fbca65810e094a13470ede8092b04499", kill_on_drop: false }`
[INFO] [stdout] bb8b134b8c3274583cfc97afe5a8f669fbca65810e094a13470ede8092b04499
