[INFO] cloning repository https://github.com/DreamLarva/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DreamLarva/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDreamLarva%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDreamLarva%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 75518234607438a2a5c1e5f314a7d997ddce6209
[INFO] checking DreamLarva/learn-rust against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDreamLarva%2Flearn-rust" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DreamLarva/learn-rust on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DreamLarva/learn-rust
[INFO] finished tweaking git repo https://github.com/DreamLarva/learn-rust
[INFO] tweaked toml for git repo https://github.com/DreamLarva/learn-rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/DreamLarva/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded adder v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32423a6eb927f4bb9e305c0b34b895c7b2e36312fba2f2d453d5c661d492f84e
[INFO] running `Command { std: "docker" "start" "-a" "32423a6eb927f4bb9e305c0b34b895c7b2e36312fba2f2d453d5c661d492f84e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32423a6eb927f4bb9e305c0b34b895c7b2e36312fba2f2d453d5c661d492f84e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32423a6eb927f4bb9e305c0b34b895c7b2e36312fba2f2d453d5c661d492f84e", kill_on_drop: false }`
[INFO] [stdout] 32423a6eb927f4bb9e305c0b34b895c7b2e36312fba2f2d453d5c661d492f84e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 244c3237dc7ce7460429bf594e9eb428fd2d7a74b6bb43550e22d085977fbc68
[INFO] running `Command { std: "docker" "start" "-a" "244c3237dc7ce7460429bf594e9eb428fd2d7a74b6bb43550e22d085977fbc68", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking adder v0.1.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking the_rust_programming_language v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `hosting` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:87:9
[INFO] [stdout]     |
[INFO] [stdout] 87  |     use crate::front_of_house::hosting;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 | pub use crate::front_of_house::hosting;
[INFO] [stdout]     |         ------------------------------ the item `hosting` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]   --> src/lib.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 | use std::fmt;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result as IoResult`
[INFO] [stdout]    --> src/lib.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 | use std::io::Result as IoResult;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `borrow`, `cmp::Ordering`
[INFO] [stdout]    --> src/lib.rs:122:11
[INFO] [stdout]     |
[INFO] [stdout] 122 | use std::{borrow, cmp::Ordering};
[INFO] [stdout]     |           ^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]    --> src/lib.rs:126:15
[INFO] [stdout]     |
[INFO] [stdout] 126 | use std::io::{self, Write}; // use io 本身 和 io::Write
[INFO] [stdout]     |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]    --> src/lib.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 129 | use std::collections::*;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process`
[INFO] [stdout]    --> src/lib.rs:135:5
[INFO] [stdout]     |
[INFO] [stdout] 135 | use std::process;
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `hosting` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:87:9
[INFO] [stdout]     |
[INFO] [stdout] 87  |     use crate::front_of_house::hosting;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 116 | pub use crate::front_of_house::hosting;
[INFO] [stdout]     |         ------------------------------ the item `hosting` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]   --> src/lib.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 | use std::fmt;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result as IoResult`
[INFO] [stdout]    --> src/lib.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 | use std::io::Result as IoResult;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `borrow`, `cmp::Ordering`
[INFO] [stdout]    --> src/lib.rs:122:11
[INFO] [stdout]     |
[INFO] [stdout] 122 | use std::{borrow, cmp::Ordering};
[INFO] [stdout]     |           ^^^^^^  ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]    --> src/lib.rs:126:15
[INFO] [stdout]     |
[INFO] [stdout] 126 | use std::io::{self, Write}; // use io 本身 和 io::Write
[INFO] [stdout]     |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]    --> src/lib.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 129 | use std::collections::*;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process`
[INFO] [stdout]    --> src/lib.rs:135:5
[INFO] [stdout]     |
[INFO] [stdout] 135 | use std::process;
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> src/lib.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let order1 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> src/lib.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |         let order2 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> src/lib.rs:90:13
[INFO] [stdout]    |
[INFO] [stdout] 90 |         let order1 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> src/lib.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |         let order2 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `serve_order`
[INFO] [stdout]   --> src/lib.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn serve_order() {}
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/lib.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn main() {}
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fix_incorrect_order`
[INFO] [stdout]   --> src/lib.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn fix_incorrect_order() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cook_order`
[INFO] [stdout]   --> src/lib.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn cook_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `seasonal_fruit`
[INFO] [stdout]   --> src/lib.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         seasonal_fruit: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Appetizer`
[INFO] [stdout]   --> src/lib.rs:49:14
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub enum Appetizer {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `eat_at_restaurant`
[INFO] [stdout]   --> src/lib.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn eat_at_restaurant() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `serve_order`
[INFO] [stdout]   --> src/lib.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn serve_order() {}
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fix_incorrect_order`
[INFO] [stdout]   --> src/lib.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn fix_incorrect_order() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cook_order`
[INFO] [stdout]   --> src/lib.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn cook_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `seasonal_fruit`
[INFO] [stdout]   --> src/lib.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |         seasonal_fruit: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Appetizer`
[INFO] [stdout]   --> src/lib.rs:49:14
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub enum Appetizer {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `eat_at_restaurant`
[INFO] [stdout]   --> src/lib.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn eat_at_restaurant() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 15 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test2`
[INFO] [stdout]   --> tests/integration_test.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn test2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/main.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `Index`
[INFO] [stdout]  --> src/main.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops::{Add, Index};
[INFO] [stdout]   |                ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `env`, `io`, `process`
[INFO] [stdout]  --> src/main.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{env, io, process};
[INFO] [stdout]   |           ^^^  ^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/ch02.rs:17:54
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let secret_number = rand::thread_rng().gen_range((1..=100)); // 这个也能运行
[INFO] [stdout]    |                                                      ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/ch03.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     /** 基本类型 */
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 7 |     // 直接的赋值能够直接推断出值的类型
[INFO] [stdout] 8 |     let a = 1; // 默认为 i32
[INFO] [stdout]   |     ---------- rustdoc does not generate documentation for statements
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]   = help: use `/* */` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/ch03.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 77 |     /** 复合类型 */
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     let _tup1: (i32, f64, u8) = (500, 6.4, 1); // 可以设置多种类型
[INFO] [stdout]    |     ------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `/* */` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/ch03.rs:150:5
[INFO] [stdout]     |
[INFO] [stdout] 150 |     /// 方法只要在作用域中声明 就能够调用(不用先声明在前)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 151 |     fun_1();
[INFO] [stdout]     |     ------- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/ch05.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let (x) = &origin;
[INFO] [stdout]    |             ^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/ch07/mod.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use std::any::Any;
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]    --> src/ch07/mod.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |     use std::collections::HashMap; // 引入HashMap 的习惯用法 而不是 use std::collections; 在使用 collections::HashMap
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Result`
[INFO] [stdout]    --> src/ch07/mod.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |         use std::fmt::Result;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result as IoResult`
[INFO] [stdout]    --> src/ch07/mod.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         use std::io::Result as IoResult;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/ch07/mod.rs:174:58
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let secret_number = rand::thread_rng().gen_range((1..100));
[INFO] [stdout]     |                                                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/ch07/mod.rs:175:58
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let secret_number = rand::thread_rng().gen_range((1..=100));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]    --> src/ch07/mod.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         use std::cmp::Ordering;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]    --> src/ch07/mod.rs:183:13
[INFO] [stdout]     |
[INFO] [stdout] 183 |         use std::io;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cmp::Ordering`, `io`
[INFO] [stdout]    --> src/ch07/mod.rs:187:19
[INFO] [stdout]     |
[INFO] [stdout] 187 |         use std::{cmp::Ordering, io};
[INFO] [stdout]     |                   ^^^^^^^^^^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]    --> src/ch07/mod.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         use std::io;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]    --> src/ch07/mod.rs:193:13
[INFO] [stdout]     |
[INFO] [stdout] 193 |         use std::io::Write;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]    --> src/ch07/mod.rs:197:23
[INFO] [stdout]     |
[INFO] [stdout] 197 |         use std::io::{self, Write};
[INFO] [stdout]     |                       ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]    --> src/ch07/mod.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |         use std::collections::*;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/ch08_hashmap.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/ch08_hashmap.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/ch08_hashmap.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/ch08_hashmap.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/ch08_hashmap.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]   --> src/ch08_hashmap.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 3  | use std::collections::*;
[INFO] [stdout]    |     ------------------- the item `HashMap` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 17 |         use std::collections::HashMap;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]  --> src/ch08_string.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/ch08_string.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/ch08_string.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/ch08_string.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]  --> src/ch08_vec.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/ch08_vec.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/ch08_vec.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/ch08_vec.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/ch08_vec.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/ch08_vec.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `io` is imported redundantly
[INFO] [stdout]    --> src/ch08_vec.rs:268:23
[INFO] [stdout]     |
[INFO] [stdout] 5   | use std::io;
[INFO] [stdout]     |     ------- the item `io` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 268 |         use std::io::{self, Write};
[INFO] [stdout]     |                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/ch09.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Future`
[INFO] [stdout]  --> src/ch09.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `the_rust_programming_language::Config`
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | use the_rust_programming_language::Config;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/main.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `Index`
[INFO] [stdout]  --> src/main.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops::{Add, Index};
[INFO] [stdout]   |                ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `env`, `io`, `process`
[INFO] [stdout]  --> src/main.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::{env, io, process};
[INFO] [stdout]   |           ^^^  ^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/ch02.rs:17:54
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let secret_number = rand::thread_rng().gen_range((1..=100)); // 这个也能运行
[INFO] [stdout]    |                                                      ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/ch03.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     /** 基本类型 */
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 7 |     // 直接的赋值能够直接推断出值的类型
[INFO] [stdout] 8 |     let a = 1; // 默认为 i32
[INFO] [stdout]   |     ---------- rustdoc does not generate documentation for statements
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]   = help: use `/* */` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/ch03.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 77 |     /** 复合类型 */
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     let _tup1: (i32, f64, u8) = (500, 6.4, 1); // 可以设置多种类型
[INFO] [stdout]    |     ------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `/* */` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/ch03.rs:150:5
[INFO] [stdout]     |
[INFO] [stdout] 150 |     /// 方法只要在作用域中声明 就能够调用(不用先声明在前)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 151 |     fun_1();
[INFO] [stdout]     |     ------- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]   --> src/ch05.rs:83:13
[INFO] [stdout]    |
[INFO] [stdout] 83 |         let (x) = &origin;
[INFO] [stdout]    |             ^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]  --> src/ch07/mod.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use std::any::Any;
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]    --> src/ch07/mod.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |     use std::collections::HashMap; // 引入HashMap 的习惯用法 而不是 use std::collections; 在使用 collections::HashMap
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Result`
[INFO] [stdout]    --> src/ch07/mod.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 |         use std::fmt::Result;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Result as IoResult`
[INFO] [stdout]    --> src/ch07/mod.rs:140:13
[INFO] [stdout]     |
[INFO] [stdout] 140 |         use std::io::Result as IoResult;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/ch07/mod.rs:174:58
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let secret_number = rand::thread_rng().gen_range((1..100));
[INFO] [stdout]     |                                                          ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/ch07/mod.rs:175:58
[INFO] [stdout]     |
[INFO] [stdout] 175 |         let secret_number = rand::thread_rng().gen_range((1..=100));
[INFO] [stdout]     |                                                          ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]    --> src/ch07/mod.rs:182:13
[INFO] [stdout]     |
[INFO] [stdout] 182 |         use std::cmp::Ordering;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]    --> src/ch07/mod.rs:183:13
[INFO] [stdout]     |
[INFO] [stdout] 183 |         use std::io;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `cmp::Ordering`, `io`
[INFO] [stdout]    --> src/ch07/mod.rs:187:19
[INFO] [stdout]     |
[INFO] [stdout] 187 |         use std::{cmp::Ordering, io};
[INFO] [stdout]     |                   ^^^^^^^^^^^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]    --> src/ch07/mod.rs:192:13
[INFO] [stdout]     |
[INFO] [stdout] 192 |         use std::io;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]    --> src/ch07/mod.rs:193:13
[INFO] [stdout]     |
[INFO] [stdout] 193 |         use std::io::Write;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `self`
[INFO] [stdout]    --> src/ch07/mod.rs:197:23
[INFO] [stdout]     |
[INFO] [stdout] 197 |         use std::io::{self, Write};
[INFO] [stdout]     |                       ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]    --> src/ch07/mod.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |         use std::collections::*;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/ch08_hashmap.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/ch08_hashmap.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/ch08_hashmap.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/ch08_hashmap.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/ch08_hashmap.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]   --> src/ch08_hashmap.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 3  | use std::collections::*;
[INFO] [stdout]    |     ------------------- the item `HashMap` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 17 |         use std::collections::HashMap;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]  --> src/ch08_string.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/ch08_string.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/ch08_string.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/ch08_string.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]  --> src/ch08_vec.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `self`
[INFO] [stdout]  --> src/ch08_vec.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs::{self, File};
[INFO] [stdout]   |               ^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/ch08_vec.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind`
[INFO] [stdout]  --> src/ch08_vec.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::ErrorKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/ch08_vec.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/ch08_vec.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `io` is imported redundantly
[INFO] [stdout]    --> src/ch08_vec.rs:268:23
[INFO] [stdout]     |
[INFO] [stdout] 5   | use std::io;
[INFO] [stdout]     |     ------- the item `io` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 268 |         use std::io::{self, Write};
[INFO] [stdout]     |                       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/ch09.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Future`
[INFO] [stdout]  --> src/ch09.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `the_rust_programming_language::Config`
[INFO] [stdout]   --> src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | use the_rust_programming_language::Config;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/ch08_string.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ch08_vec.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Float => (),
[INFO] [stdout]     |             ----- matches any value
[INFO] [stdout] 123 |             Int => (),
[INFO] [stdout]     |             ^^^ unreachable pattern
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]    --> src/ch03.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 |     a = [1, 2, 3, 4, 5];
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]    --> src/ch06.rs:276:18
[INFO] [stdout]     |
[INFO] [stdout] 276 |             _ => count += 1,
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]    --> src/ch06.rs:286:13
[INFO] [stdout]     |
[INFO] [stdout] 286 |             count += 1;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]    --> src/ch10.rs:646:13
[INFO] [stdout]     |
[INFO] [stdout] 646 |             result = longest(string1.as_str(), string2.as_str());
[INFO] [stdout]     |             ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ch04.rs:278:13
[INFO] [stdout]     |
[INFO] [stdout] 278 |         let mut s = String::from("hello world");
[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/ch08_string.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let mut a = String::new(); // 使用类似Vector 的方法 新建一个空的字符串
[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/ch08_string.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut s3 = s1 + &s2 + &s4; // 注意 s1 被移动了，不能继续使用 s2 s3 可以继续使用
[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/ch08_string.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut t3 = String::from("") + &s2 + &s3;
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/ch08_string.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ch08_vec.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Float => (),
[INFO] [stdout]     |             ----- matches any value
[INFO] [stdout] 123 |             Int => (),
[INFO] [stdout]     |             ^^^ unreachable pattern
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]    --> src/ch03.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 |     a = [1, 2, 3, 4, 5];
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]    --> src/ch06.rs:276:18
[INFO] [stdout]     |
[INFO] [stdout] 276 |             _ => count += 1,
[INFO] [stdout]     |                  ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]    --> src/ch06.rs:286:13
[INFO] [stdout]     |
[INFO] [stdout] 286 |             count += 1;
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]    --> src/ch10.rs:646:13
[INFO] [stdout]     |
[INFO] [stdout] 646 |             result = longest(string1.as_str(), string2.as_str());
[INFO] [stdout]     |             ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ch04.rs:278:13
[INFO] [stdout]     |
[INFO] [stdout] 278 |         let mut s = String::from("hello world");
[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/ch10.rs:793:13
[INFO] [stdout]     |
[INFO] [stdout] 793 |         let mut s: &'static str = "I have a static lifetime.";
[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/ch08_string.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let mut a = String::new(); // 使用类似Vector 的方法 新建一个空的字符串
[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/ch08_string.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut s3 = s1 + &s2 + &s4; // 注意 s1 被移动了，不能继续使用 s2 s3 可以继续使用
[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/ch08_string.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut t3 = String::from("") + &s2 + &s3;
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `ch10_02_traits::Point<T, S>` in public interface (error E0446)
[INFO] [stdout]    --> src/ch10.rs:188:13
[INFO] [stdout]     |
[INFO] [stdout] 188 |             fn summarize1(&self) -> Point<T, S>;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(private_in_public)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `ch10_02_traits::Point<i32, f64>` in public interface (error E0446)
[INFO] [stdout]    --> src/ch10.rs:206:13
[INFO] [stdout]     |
[INFO] [stdout] 206 |             fn summarize1(&self) -> Point<i32, f64> {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/ch01.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch02_00_guessing_game_tutorial`
[INFO] [stdout]   --> src/ch02.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn ch02_00_guessing_game_tutorial() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch03_02_data_types`
[INFO] [stdout]  --> src/ch03.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn ch03_02_data_types() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch03_03_how_functions_work`
[INFO] [stdout]    --> src/ch03.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | pub fn ch03_03_how_functions_work() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch03_05_control_flow`
[INFO] [stdout]    --> src/ch03.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub fn ch03_05_control_flow() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun_2`
[INFO] [stdout]    --> src/ch03.rs:253:4
[INFO] [stdout]     |
[INFO] [stdout] 253 | fn fun_2() {}
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch04_01_what_is_ownership`
[INFO] [stdout]   --> src/ch04.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn ch04_01_what_is_ownership() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch04_02_references_and_borrowing`
[INFO] [stdout]    --> src/ch04.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 | pub fn ch04_02_references_and_borrowing() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch04_03_slices`
[INFO] [stdout]    --> src/ch04.rs:231:8
[INFO] [stdout]     |
[INFO] [stdout] 231 | pub fn ch04_03_slices() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch05_01_defining_structs`
[INFO] [stdout]  --> src/ch05.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn ch05_01_defining_structs() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch05_02_example_structs`
[INFO] [stdout]    --> src/ch05.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn ch05_02_example_structs() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch05_03_method_syntax`
[INFO] [stdout]    --> src/ch05.rs:185:8
[INFO] [stdout]     |
[INFO] [stdout] 185 | pub fn ch05_03_method_syntax() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch06_01_defining_an_enum`
[INFO] [stdout]  --> src/ch06.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn ch06_01_defining_an_enum() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch06_02_match`
[INFO] [stdout]    --> src/ch06.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub fn ch06_02_match() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]    --> src/ch06.rs:228:5
[INFO] [stdout]     |
[INFO] [stdout] 228 |     Alabama,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]    --> src/ch06.rs:229:5
[INFO] [stdout]     |
[INFO] [stdout] 229 |     Alaska,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `A1`
[INFO] [stdout]    --> src/ch06.rs:230:5
[INFO] [stdout]     |
[INFO] [stdout] 230 |     A1(B1), // --snip--
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `B2`
[INFO] [stdout]    --> src/ch06.rs:235:5
[INFO] [stdout]     |
[INFO] [stdout] 235 |     B2,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `B3`
[INFO] [stdout]    --> src/ch06.rs:236:5
[INFO] [stdout]     |
[INFO] [stdout] 236 |     B3,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]    --> src/ch06.rs:240:6
[INFO] [stdout]     |
[INFO] [stdout] 240 | enum Coin {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch06_03_if_let`
[INFO] [stdout]    --> src/ch06.rs:248:8
[INFO] [stdout]     |
[INFO] [stdout] 248 | pub fn ch06_03_if_let() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/mod.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |         pub fn clarinet() {
[INFO] [stdout]   |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `breathe_in`
[INFO] [stdout]   --> src/ch07/mod.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn breathe_in() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Vegetable`
[INFO] [stdout]   --> src/ch07/mod.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub struct Vegetable {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ch07/mod.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |         pub fn new(name: &str) -> Vegetable {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_struct`
[INFO] [stdout]   --> src/ch07/mod.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn generate_struct() -> Vegetable {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Appetizer`
[INFO] [stdout]   --> src/ch07/mod.rs:50:14
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub enum Appetizer {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet_trio`
[INFO] [stdout]   --> src/ch07/mod.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn clarinet_trio() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/sound1.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub fn clarinet() {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/sound2/instrument.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn clarinet() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/sound3/instrument.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn clarinet() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/ch07/mod.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch08_03_hash_maps`
[INFO] [stdout]   --> src/ch08_hashmap.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn ch08_03_hash_maps() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch08_01_vectors`
[INFO] [stdout]   --> src/ch08_vec.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn ch08_01_vectors() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch09_01_unrecoverable_errors_with_panic`
[INFO] [stdout]   --> src/ch09.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn ch09_01_unrecoverable_errors_with_panic() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch09_02_recoverable_errors_with_result`
[INFO] [stdout]   --> src/ch09.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn ch09_02_recoverable_errors_with_result() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch09_03_to_panic_or_not_to_panic`
[INFO] [stdout]    --> src/ch09.rs:175:8
[INFO] [stdout]     |
[INFO] [stdout] 175 | pub fn ch09_03_to_panic_or_not_to_panic() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_00_generics`
[INFO] [stdout]  --> src/ch10.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn ch10_00_generics() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_01_syntax`
[INFO] [stdout]   --> src/ch10.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn ch10_01_syntax() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_02_traits`
[INFO] [stdout]    --> src/ch10.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn ch10_02_traits() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_03_lifetime_syntax`
[INFO] [stdout]    --> src/ch10.rs:586:8
[INFO] [stdout]     |
[INFO] [stdout] 586 | pub fn ch10_03_lifetime_syntax() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]    --> src/ch11_01.rs:135:5
[INFO] [stdout]     |
[INFO] [stdout] 135 |     value: i32,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]   --> src/ch11_03.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Config`
[INFO] [stdout]   --> src/ch12.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Config {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ch12.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn new(args: &[String]) -> Result<Config, &'static str> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `minigrep`
[INFO] [stdout]   --> src/ch12.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn minigrep() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/ch12.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn run(config: Config) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch13_01_closures`
[INFO] [stdout]  --> src/ch13.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn ch13_01_closures() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch13_02_iterators`
[INFO] [stdout]    --> src/ch13.rs:183:8
[INFO] [stdout]     |
[INFO] [stdout] 183 | pub fn ch13_02_iterators() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot test inner items
[INFO] [stdout]    --> src/ch13.rs:251:9
[INFO] [stdout]     |
[INFO] [stdout] 251 |         #[test]
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unnameable_test_items)]` on by default
[INFO] [stdout]     = note: this warning originates in the attribute macro `test` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `changeColorMessage` should have a snake case name
[INFO] [stdout]   --> src/ch06.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let changeColorMessage = ChangeColorMessage(1, 1, 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `change_color_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Float` should have a snake case name
[INFO] [stdout]    --> src/ch08_vec.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Float => (),
[INFO] [stdout]     |             ^^^^^ help: convert the identifier to snake case (notice the capitalization): `float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Int` should have a snake case name
[INFO] [stdout]    --> src/ch08_vec.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |             Int => (),
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case (notice the capitalization): `int`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ch10.rs:793:13
[INFO] [stdout]     |
[INFO] [stdout] 793 |         let mut s: &'static str = "I have a static lifetime.";
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 110 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `ch10_02_traits::Point<T, S>` in public interface (error E0446)
[INFO] [stdout]    --> src/ch10.rs:188:13
[INFO] [stdout]     |
[INFO] [stdout] 188 |             fn summarize1(&self) -> Point<T, S>;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(private_in_public)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private type `ch10_02_traits::Point<i32, f64>` in public interface (error E0446)
[INFO] [stdout]    --> src/ch10.rs:206:13
[INFO] [stdout]     |
[INFO] [stdout] 206 |             fn summarize1(&self) -> Point<i32, f64> {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #34537 <https://github.com/rust-lang/rust/issues/34537>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> src/ch01.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch02_00_guessing_game_tutorial`
[INFO] [stdout]   --> src/ch02.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn ch02_00_guessing_game_tutorial() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch03_02_data_types`
[INFO] [stdout]  --> src/ch03.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn ch03_02_data_types() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch03_03_how_functions_work`
[INFO] [stdout]    --> src/ch03.rs:131:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | pub fn ch03_03_how_functions_work() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch03_05_control_flow`
[INFO] [stdout]    --> src/ch03.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 | pub fn ch03_05_control_flow() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fun_2`
[INFO] [stdout]    --> src/ch03.rs:253:4
[INFO] [stdout]     |
[INFO] [stdout] 253 | fn fun_2() {}
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch04_01_what_is_ownership`
[INFO] [stdout]   --> src/ch04.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn ch04_01_what_is_ownership() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch04_02_references_and_borrowing`
[INFO] [stdout]    --> src/ch04.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 | pub fn ch04_02_references_and_borrowing() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch04_03_slices`
[INFO] [stdout]    --> src/ch04.rs:231:8
[INFO] [stdout]     |
[INFO] [stdout] 231 | pub fn ch04_03_slices() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch05_01_defining_structs`
[INFO] [stdout]  --> src/ch05.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn ch05_01_defining_structs() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch05_02_example_structs`
[INFO] [stdout]    --> src/ch05.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub fn ch05_02_example_structs() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch05_03_method_syntax`
[INFO] [stdout]    --> src/ch05.rs:185:8
[INFO] [stdout]     |
[INFO] [stdout] 185 | pub fn ch05_03_method_syntax() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch06_01_defining_an_enum`
[INFO] [stdout]  --> src/ch06.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn ch06_01_defining_an_enum() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch06_02_match`
[INFO] [stdout]    --> src/ch06.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 125 | pub fn ch06_02_match() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]    --> src/ch06.rs:228:5
[INFO] [stdout]     |
[INFO] [stdout] 228 |     Alabama,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]    --> src/ch06.rs:229:5
[INFO] [stdout]     |
[INFO] [stdout] 229 |     Alaska,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `A1`
[INFO] [stdout]    --> src/ch06.rs:230:5
[INFO] [stdout]     |
[INFO] [stdout] 230 |     A1(B1), // --snip--
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `B2`
[INFO] [stdout]    --> src/ch06.rs:235:5
[INFO] [stdout]     |
[INFO] [stdout] 235 |     B2,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `B3`
[INFO] [stdout]    --> src/ch06.rs:236:5
[INFO] [stdout]     |
[INFO] [stdout] 236 |     B3,
[INFO] [stdout]     |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]    --> src/ch06.rs:240:6
[INFO] [stdout]     |
[INFO] [stdout] 240 | enum Coin {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch06_03_if_let`
[INFO] [stdout]    --> src/ch06.rs:248:8
[INFO] [stdout]     |
[INFO] [stdout] 248 | pub fn ch06_03_if_let() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/mod.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |         pub fn clarinet() {
[INFO] [stdout]   |                ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `breathe_in`
[INFO] [stdout]   --> src/ch07/mod.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn breathe_in() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Vegetable`
[INFO] [stdout]   --> src/ch07/mod.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub struct Vegetable {
[INFO] [stdout]    |                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ch07/mod.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |         pub fn new(name: &str) -> Vegetable {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_struct`
[INFO] [stdout]   --> src/ch07/mod.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |     pub fn generate_struct() -> Vegetable {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Appetizer`
[INFO] [stdout]   --> src/ch07/mod.rs:50:14
[INFO] [stdout]    |
[INFO] [stdout] 50 |     pub enum Appetizer {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet_trio`
[INFO] [stdout]   --> src/ch07/mod.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn clarinet_trio() {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/sound1.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub fn clarinet() {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/sound2/instrument.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn clarinet() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clarinet`
[INFO] [stdout]  --> src/ch07/sound3/instrument.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn clarinet() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/ch07/mod.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch08_03_hash_maps`
[INFO] [stdout]   --> src/ch08_hashmap.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn ch08_03_hash_maps() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch08_01_vectors`
[INFO] [stdout]   --> src/ch08_vec.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn ch08_01_vectors() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch09_01_unrecoverable_errors_with_panic`
[INFO] [stdout]   --> src/ch09.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn ch09_01_unrecoverable_errors_with_panic() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch09_02_recoverable_errors_with_result`
[INFO] [stdout]   --> src/ch09.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn ch09_02_recoverable_errors_with_result() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch09_03_to_panic_or_not_to_panic`
[INFO] [stdout]    --> src/ch09.rs:175:8
[INFO] [stdout]     |
[INFO] [stdout] 175 | pub fn ch09_03_to_panic_or_not_to_panic() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_00_generics`
[INFO] [stdout]  --> src/ch10.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn ch10_00_generics() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_01_syntax`
[INFO] [stdout]   --> src/ch10.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn ch10_01_syntax() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_02_traits`
[INFO] [stdout]    --> src/ch10.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn ch10_02_traits() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch10_03_lifetime_syntax`
[INFO] [stdout]    --> src/ch10.rs:586:8
[INFO] [stdout]     |
[INFO] [stdout] 586 | pub fn ch10_03_lifetime_syntax() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/ch11_01.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]   --> src/ch11_01.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `greeting`
[INFO] [stdout]    --> src/ch11_01.rs:114:8
[INFO] [stdout]     |
[INFO] [stdout] 114 | pub fn greeting(name: &str) -> String {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Guess`
[INFO] [stdout]    --> src/ch11_01.rs:134:12
[INFO] [stdout]     |
[INFO] [stdout] 134 | pub struct Guess {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/ch11_01.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn new(value: i32) -> Guess {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `prints_and_returns_10`
[INFO] [stdout]   --> src/ch11_02.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn prints_and_returns_10(a: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]   --> src/ch11_02.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]   --> src/ch11_03.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `internal_adder`
[INFO] [stdout]   --> src/ch11_03.rs:22:4
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn internal_adder(a: i32, b: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Config`
[INFO] [stdout]   --> src/ch12.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Config {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/ch12.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn new(args: &[String]) -> Result<Config, &'static str> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `minigrep`
[INFO] [stdout]   --> src/ch12.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn minigrep() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `run`
[INFO] [stdout]   --> src/ch12.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn run(config: Config) -> Result<(), Box<dyn Error>> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `search`
[INFO] [stdout]   --> src/ch12.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch13_01_closures`
[INFO] [stdout]  --> src/ch13.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn ch13_01_closures() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ch13_02_iterators`
[INFO] [stdout]    --> src/ch13.rs:183:8
[INFO] [stdout]     |
[INFO] [stdout] 183 | pub fn ch13_02_iterators() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `changeColorMessage` should have a snake case name
[INFO] [stdout]   --> src/ch06.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let changeColorMessage = ChangeColorMessage(1, 1, 1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `change_color_message`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Float` should have a snake case name
[INFO] [stdout]    --> src/ch08_vec.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Float => (),
[INFO] [stdout]     |             ^^^^^ help: convert the identifier to snake case (notice the capitalization): `float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Int` should have a snake case name
[INFO] [stdout]    --> src/ch08_vec.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |             Int => (),
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case (notice the capitalization): `int`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 117 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.18s
[INFO] running `Command { std: "docker" "inspect" "244c3237dc7ce7460429bf594e9eb428fd2d7a74b6bb43550e22d085977fbc68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "244c3237dc7ce7460429bf594e9eb428fd2d7a74b6bb43550e22d085977fbc68", kill_on_drop: false }`
[INFO] [stdout] 244c3237dc7ce7460429bf594e9eb428fd2d7a74b6bb43550e22d085977fbc68