[INFO] cloning repository https://github.com/S0nrEir/HelloRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/S0nrEir/HelloRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FS0nrEir%2FHelloRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FS0nrEir%2FHelloRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 88b432cc81b8975f88cf43bf1473ff790b63c436
[INFO] testing S0nrEir/HelloRust against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FS0nrEir%2FHelloRust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/S0nrEir/HelloRust on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/S0nrEir/HelloRust
[INFO] finished tweaking git repo https://github.com/S0nrEir/HelloRust
[INFO] tweaked toml for git repo https://github.com/S0nrEir/HelloRust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/S0nrEir/HelloRust 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5348487ae98f9475a802c11659d9015dbcffaedc3dd0b0038513bc967d3f04e
[INFO] running `Command { std: "docker" "start" "-a" "a5348487ae98f9475a802c11659d9015dbcffaedc3dd0b0038513bc967d3f04e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5348487ae98f9475a802c11659d9015dbcffaedc3dd0b0038513bc967d3f04e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5348487ae98f9475a802c11659d9015dbcffaedc3dd0b0038513bc967d3f04e", kill_on_drop: false }`
[INFO] [stdout] a5348487ae98f9475a802c11659d9015dbcffaedc3dd0b0038513bc967d3f04e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aac9a77725c008681190c5dba8ef4080793bb376ae3755013a77dea15968513b
[INFO] running `Command { std: "docker" "start" "-a" "aac9a77725c008681190c5dba8ef4080793bb376ae3755013a77dea15968513b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling RustPrograming_Cases v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/back_of_house.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `soup`
[INFO] [stdout]   --> src/lib.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let soup:back_of_house::Appetizer = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_soup`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `salad`
[INFO] [stdout]   --> src/lib.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let salad:back_of_house::Appetizer = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_salad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deliver_order` is never used
[INFO] [stdout]   --> src/lib.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn deliver_order(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]  --> src/back_of_house.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn to_string(){
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fix_incorrect_order` is never used
[INFO] [stdout]  --> src/back_of_house.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn fix_incorrect_order(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cook_order` is never used
[INFO] [stdout]   --> src/back_of_house.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn cook_order(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> src/front_of_house/hosting.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn seat_at_table(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn take_order(){
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn serve_order(){
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn take_payment(){
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustPrograming_Cases` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_programing_cases`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::Rng;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_05_struct_and_example.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std:: cmp::Ordering`
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std:: cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V4_u8` should have an upper camel case name
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     V4_u8(u8,u8,u8,u8),//另一种参数类型的V4枚举
[INFO] [stdout]    |     ^^^^^ help: convert the identifier to upper camel case: `V4U8`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_07_pachage_and_crates.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `io`, `string`
[INFO] [stdout]  --> src/mod_08_collections.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, string};
[INFO] [stdout]   |           ^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/mod_08_collections.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `file`
[INFO] [stdout]  --> src/mod_09_error_handling.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{file, fs::File, io::{ErrorKind, Write, Read,self}};
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Error`
[INFO] [stdout]  --> src/mod_09_error_handling.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone`, `format`, `string`
[INFO] [stdout]  --> src/mod_10_02_trait.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::{format, Display,Debug}, string, clone};
[INFO] [stdout]   |                 ^^^^^^                  ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string`
[INFO] [stdout]  --> src/mod_10_03_lifetime.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::string;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::mod_tests`
[INFO] [stdout]  --> src/mod_11_01_testing.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::mod_tests;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_13_01_closure.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/mod_13_02_iterators.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::mod_05_struct_and_example::Rectangle`
[INFO] [stdout]   --> src/mod_tests.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use crate::mod_05_struct_and_example::Rectangle;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/main.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | mod mod_tests;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     return;
[INFO] [stdout]   |     ------ any code following this expression is unreachable
[INFO] [stdout] 7 |     
[INFO] [stdout] 8 |     ch_03_01();
[INFO] [stdout]   |     ^^^^^^^^^^^ unreachable statement
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 17 |     let hello = &s[0..5];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_09_error_handling.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 23 |     let v = vec![1,2,3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_13_01_closure.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 13 |     let list = vec![1,2,3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let x = if contition {1} else {0};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `result` is assigned to, but never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut result:i32 = 0;
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_result` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             result = counter;
[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: unused variable: `val`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:147:25
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:154:42
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stdout]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let number :u32 = "42".parse().expect("cast faild");
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let f : bool = false;//一个bool类型
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let test : i32 = tup.0;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |     let test : f32 = tup.1;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     let test : &String = &tup.2;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `another_arr`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let another_arr:[i32;5]=[1,2,3,4,5];//主动声明了类型和大小的数组
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let first = arr[0];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |     let second = arr[1];
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let x = x * 2;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello = &s[0..5];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let world = &s[6..11];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_1`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let slice_1 = &s[0..];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_2`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let slice_2 = &s[..len];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_3`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let slice_3 = &a[1..3];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user_4`
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let user_4:User = User{
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_user_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut user_2 = gen_user(String::from("789@xxx.com"),String::from("user_name"));
[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: unused variable: `point`
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let point:Point = Point(0,0,0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `width`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let width:u32 = 50;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:162:9
[INFO] [stdout]     |
[INFO] [stdout] 162 |     let height:u32 = 50;
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |     let rect : (u32,u32)= (30,30);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_rect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_stct`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let rect_stct:Rectangle = Rectangle{
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_stct`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_1`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     let rect_test_1:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_2`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let rect_test_2:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_3`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:190:9
[INFO] [stdout]     |
[INFO] [stdout] 190 |     let rect_test_3:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let none : IpAddrKindEnum = IpAddrKindEnum::None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let four : IpAddrKindEnum = IpAddrKindEnum::V4(String::from("123.0.0.1"));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four_another`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let four_another : IpAddrKindEnum = IpAddrKindEnum::V4_u8( 127 , 0 , 0 , 0 );
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_four_another`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let six : IpAddrKindEnum = IpAddrKindEnum::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v_temp`
[INFO] [stdout]   --> src/mod_08_collections.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let v_temp = vec![1,2,3];//直接使用vec!宏来创建一个类型为Vec<i32>并且保存了元素的集合,Rust会自动推断其类型                            ...
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `third`
[INFO] [stdout]   --> src/mod_08_collections.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let third:&i32 = &v[last];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_third`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/mod_08_collections.rs:83:30
[INFO] [stdout]    |
[INFO] [stdout] 83 |         SpreadSheetCell::Int(t) => println!("t"),
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/mod_08_collections.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let str = String::new();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_9`
[INFO] [stdout]   --> src/mod_08_collections.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut s_9 = data.to_string();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_s_9`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s_8` is never read
[INFO] [stdout]    --> src/mod_08_collections.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let mut s_8 = "initial ccontents".to_string();
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s_8` is never read
[INFO] [stdout]    --> src/mod_08_collections.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     s_8 = s_6 + &s_7;//s_6被移动了，不能继续使用，这是因为+使用了add函数fn add(self, s: &str) -> String
[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/mod_08_collections.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut s_9 = data.to_string();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `blue_score`
[INFO] [stdout]    --> src/mod_08_collections.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 151 |     let blue_score = scores.get(&String::from("blue")).copied().unwrap_or(0);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_blue_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> src/mod_09_error_handling.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mod_09_error_handling.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stdout]    |         ----^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:21:28
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn notify__<T:Summary>(item:&T){
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:26:35
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn notify_<T:Summary+Display>(item:&T){
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn _notify_(item:&(impl Summary+Display)){
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:34:23
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:34:28
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:27
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expensive_closure`
[INFO] [stdout]   --> src/mod_13_01_closure.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let expensive_closure = |num:u32|->u32{//也可以注明参数类型
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_closure`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_one_v2`
[INFO] [stdout]   --> src/mod_13_01_closure.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let add_one_v2 = |x:u32|->u32{ x+1 };
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp`
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_02_guessing_game.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fibonacci` is never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn fibonacci(level:i32)->i32{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_05` is never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn ch_03_05(){
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_04` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn ch_03_04(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_03` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:133:4
[INFO] [stdout]     |
[INFO] [stdout] 133 | fn ch_03_03(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `another_function` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn another_function(x:i32){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `yet_another_function` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `yet_another_function_return_with_bool` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two_number` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn add_two_number(x:i32, y:i32)->i32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_02` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn ch_03_02(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_01` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:192:4
[INFO] [stdout]     |
[INFO] [stdout] 192 | fn ch_03_01(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_04_understanding_owership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_04_03_enter` is never used
[INFO] [stdout]  --> src/mod_04_understanding_owership.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn ch_04_03_enter(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_with_str` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn first_word_with_str(s:&str)->&str{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn first_word(s:&String)->usize{
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_04_enter` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn ch_04_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn do_something(str:String){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something_ref` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn do_something_ref(str:&mut String){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_05_struct_and_example.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct User{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_05_01_enter` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn ch_05_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct Color (i32,i32,i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Point(i32,i32,i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlwaysEqual` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct AlwaysEqual;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_struct` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn tuple_struct(){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_user` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn gen_user(email:String , user_name:String)->User{
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `area`, `can_hold`, `can_hold_area`, and `square` are never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 114 | impl Rectangle{
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 115 |
[INFO] [stdout] 116 |     pub fn new(width_:u32,height_:u32)->Self{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn area(&self)->u32{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 129 |     pub fn can_hold(&self,other:&Rectangle)->bool{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn can_hold_area(&self,other:&Rectangle)->bool{
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 141 |     fn square(size:u32)->Self{
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_self` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 150 | impl Rectangle{
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 151 |     fn print_self(&self){
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_05_02_enter` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn ch_05_02_enter(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rectangles` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:160:4
[INFO] [stdout]     |
[INFO] [stdout] 160 | fn rectangles(){
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_struct` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:203:4
[INFO] [stdout]     |
[INFO] [stdout] 203 | fn area_struct(rect:&Rectangle)->u32{
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:208:4
[INFO] [stdout]     |
[INFO] [stdout] 208 | fn area(width:u32,height:u32)->u32{
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_dimension` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:212:4
[INFO] [stdout]     |
[INFO] [stdout] 212 | fn area_dimension(dimension:(u32,u32))->u32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKindEnum` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum IpAddrKindEnum{
[INFO] [stdout]    |      ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MessageEnum` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum MessageEnum{
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl MessageEnum{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 27 |     fn call(&self){
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_01_enter` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn ch_06_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum UsState{
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 48 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 49 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` 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 `Coin` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:56:6
[INFO] [stdout]    |
[INFO] [stdout] 56 | enum Coin{
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_02_enter` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn ch_06_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_of_cents` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn value_of_cents(coin:&Coin)->u8{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn plus_one(x:&Option<i32>) -> Option<i32>{
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dice_roll` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn dice_roll(roll_result:&u8){
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_fancy_hat` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:139:4
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn add_fancy_hat(){}
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_fancy_hat` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:140:4
[INFO] [stdout]     |
[INFO] [stdout] 140 | fn remove_fancy_hat(){}
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_player` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn move_player(num_space:&u8){
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `re_roll` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn re_roll(){
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_03_enter` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn ch_06_03_enter() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_07_pachage_and_crates.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_01_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn ch_07_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_02_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn ch_07_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_03_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn ch_07_03_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SpreadSheetCell` is never used
[INFO] [stdout]  --> src/mod_08_collections.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum SpreadSheetCell{
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_01_enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn ch_08_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_02_enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn ch_08_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_03_enter` is never used
[INFO] [stdout]    --> src/mod_08_collections.rs:142:4
[INFO] [stdout]     |
[INFO] [stdout] 142 | fn ch_08_03_enter(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `output_hash_map` is never used
[INFO] [stdout]    --> src/mod_08_collections.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn output_hash_map(hash_set : &HashMap<String,u32>){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_09_error_handling.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_09_01_enter` is never used
[INFO] [stdout]  --> src/mod_09_error_handling.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn ch_09_01_enter(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_09_02_enter` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn ch_09_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_2` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn read_username_from_file_2()->Result<String, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn read_username_from_file()->Result<String, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_unwrap` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn file_unwrap(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_unwrap_expect` is never used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn file_unwrap_expect(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write` is never used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn write(file:&mut File,content:&[u8]){
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/mod_10_01_generics.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Point<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_x` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T> Point<T>{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 11 |     fn get_x(&self)->&T{
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Point<f32>{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 18 |     fn distance_from_origin(&self) -> f32{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_string`, and `return_summarizable` are never used
[INFO] [stdout]   --> src/mod_10_02_trait.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl NewsArticle{
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 59 |     fn new(headline_:String, location_:String, author_:String, content_:String)->Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn to_string(&self){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     fn return_summarizable()->impl Summary{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 98  | impl Tweet{
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 105 |     fn new(username_:String,content_:String,reply_:bool,retweet_:bool)->Self{
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | pub fn enter(){
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/mod_10_02_trait.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 | struct Pair<T>{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:137:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl<T> Pair<T>{
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 137 |     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/mod_10_02_trait.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | impl<T:Display+PartialOrd> Pair<T>{
[INFO] [stdout]     | ---------------------------------- method in this implementation
[INFO] [stdout] 144 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_10_03_lifetime.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn longest<'a>(x:&'a str,y:&'a str) -> &'a str{
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_` is never used
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_11_01_testing.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_13_01_closure.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `Blue` are never constructed
[INFO] [stdout]   --> src/mod_13_01_closure.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 57 | enum ShirtColor{
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 58 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 59 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ShirtColor` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Inventory` is never constructed
[INFO] [stdout]   --> src/mod_13_01_closure.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | struct Inventory{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `give_away`, `most_stocked_`, and `most_stocked` are never used
[INFO] [stdout]   --> src/mod_13_01_closure.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Inventory{
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 67 |
[INFO] [stdout] 68 |     pub fn new(colors_:&Vec<ShirtColor>)->Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn give_away(&self,user_preference:Option<ShirtColor>)->ShirtColor{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn most_stocked_()->ShirtColor{
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn most_stocked(&self)->ShirtColor{
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]    --> src/mod_13_01_closure.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 115 | struct Rectangle{
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 116 |     width:u32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 117 |     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 `sort_by_key` is never used
[INFO] [stdout]    --> src/mod_13_01_closure.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn sort_by_key(){
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `reset` is never used
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl TempStructIter{
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 67 |     fn reset(&mut self){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoes_in_size` is never used
[INFO] [stdout]    --> src/mod_13_02_iterators.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn shoes_in_size(shoes_:Vec<Shoe>,shoe_size_:u32)->Vec<Shoe>{
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustPrograming_Cases` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_programing_cases`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 |     file.write_all(content);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let _ = file.write_all(content);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 169 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `Command { std: "docker" "inspect" "aac9a77725c008681190c5dba8ef4080793bb376ae3755013a77dea15968513b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aac9a77725c008681190c5dba8ef4080793bb376ae3755013a77dea15968513b", kill_on_drop: false }`
[INFO] [stdout] aac9a77725c008681190c5dba8ef4080793bb376ae3755013a77dea15968513b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83d7901a95871307d725e6f14066e81f2c3ecd81a4d7aa96be5f840807c56b01
[INFO] running `Command { std: "docker" "start" "-a" "83d7901a95871307d725e6f14066e81f2c3ecd81a4d7aa96be5f840807c56b01", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/back_of_house.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `soup`
[INFO] [stdout]   --> src/lib.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let soup:back_of_house::Appetizer = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_soup`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `salad`
[INFO] [stdout]   --> src/lib.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let salad:back_of_house::Appetizer = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_salad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deliver_order` is never used
[INFO] [stdout]   --> src/lib.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn deliver_order(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling RustPrograming_Cases v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]  --> src/back_of_house.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn to_string(){
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fix_incorrect_order` is never used
[INFO] [stdout]  --> src/back_of_house.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn fix_incorrect_order(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cook_order` is never used
[INFO] [stdout]   --> src/back_of_house.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn cook_order(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> src/front_of_house/hosting.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn seat_at_table(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn take_order(){
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn serve_order(){
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn take_payment(){
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustPrograming_Cases` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_programing_cases`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::Rng;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_05_struct_and_example.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std:: cmp::Ordering`
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std:: cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V4_u8` should have an upper camel case name
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     V4_u8(u8,u8,u8,u8),//另一种参数类型的V4枚举
[INFO] [stdout]    |     ^^^^^ help: convert the identifier to upper camel case: `V4U8`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_07_pachage_and_crates.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `io`, `string`
[INFO] [stdout]  --> src/mod_08_collections.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, string};
[INFO] [stdout]   |           ^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/mod_08_collections.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `file`
[INFO] [stdout]  --> src/mod_09_error_handling.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{file, fs::File, io::{ErrorKind, Write, Read,self}};
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Error`
[INFO] [stdout]  --> src/mod_09_error_handling.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone`, `format`, `string`
[INFO] [stdout]  --> src/mod_10_02_trait.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::{format, Display,Debug}, string, clone};
[INFO] [stdout]   |                 ^^^^^^                  ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string`
[INFO] [stdout]  --> src/mod_10_03_lifetime.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::string;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::mod_tests`
[INFO] [stdout]  --> src/mod_11_01_testing.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::mod_tests;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_13_01_closure.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/mod_13_02_iterators.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::mod_05_struct_and_example::Rectangle`
[INFO] [stdout]   --> src/mod_tests.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use crate::mod_05_struct_and_example::Rectangle;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/main.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | mod mod_tests;
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     return;
[INFO] [stdout]   |     ------ any code following this expression is unreachable
[INFO] [stdout] 7 |     
[INFO] [stdout] 8 |     ch_03_01();
[INFO] [stdout]   |     ^^^^^^^^^^^ unreachable statement
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 17 |     let hello = &s[0..5];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_09_error_handling.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 23 |     let v = vec![1,2,3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_13_01_closure.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 13 |     let list = vec![1,2,3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let x = if contition {1} else {0};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `result` is assigned to, but never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut result:i32 = 0;
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_result` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             result = counter;
[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: unused variable: `val`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:147:25
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:154:42
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stdout]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let number :u32 = "42".parse().expect("cast faild");
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let f : bool = false;//一个bool类型
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let test : i32 = tup.0;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |     let test : f32 = tup.1;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     let test : &String = &tup.2;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `another_arr`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let another_arr:[i32;5]=[1,2,3,4,5];//主动声明了类型和大小的数组
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let first = arr[0];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |     let second = arr[1];
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let x = x * 2;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello = &s[0..5];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let world = &s[6..11];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_1`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let slice_1 = &s[0..];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_2`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let slice_2 = &s[..len];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_3`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let slice_3 = &a[1..3];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user_4`
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let user_4:User = User{
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_user_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut user_2 = gen_user(String::from("789@xxx.com"),String::from("user_name"));
[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: unused variable: `point`
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let point:Point = Point(0,0,0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `width`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let width:u32 = 50;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:162:9
[INFO] [stdout]     |
[INFO] [stdout] 162 |     let height:u32 = 50;
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |     let rect : (u32,u32)= (30,30);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_rect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_stct`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let rect_stct:Rectangle = Rectangle{
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_stct`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_1`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     let rect_test_1:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_2`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let rect_test_2:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_3`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:190:9
[INFO] [stdout]     |
[INFO] [stdout] 190 |     let rect_test_3:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let none : IpAddrKindEnum = IpAddrKindEnum::None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let four : IpAddrKindEnum = IpAddrKindEnum::V4(String::from("123.0.0.1"));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four_another`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let four_another : IpAddrKindEnum = IpAddrKindEnum::V4_u8( 127 , 0 , 0 , 0 );
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_four_another`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let six : IpAddrKindEnum = IpAddrKindEnum::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v_temp`
[INFO] [stdout]   --> src/mod_08_collections.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let v_temp = vec![1,2,3];//直接使用vec!宏来创建一个类型为Vec<i32>并且保存了元素的集合,Rust会自动推断其类型                            ...
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `third`
[INFO] [stdout]   --> src/mod_08_collections.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let third:&i32 = &v[last];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_third`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/mod_08_collections.rs:83:30
[INFO] [stdout]    |
[INFO] [stdout] 83 |         SpreadSheetCell::Int(t) => println!("t"),
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/mod_08_collections.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let str = String::new();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_9`
[INFO] [stdout]   --> src/mod_08_collections.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut s_9 = data.to_string();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_s_9`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s_8` is never read
[INFO] [stdout]    --> src/mod_08_collections.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let mut s_8 = "initial ccontents".to_string();
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s_8` is never read
[INFO] [stdout]    --> src/mod_08_collections.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     s_8 = s_6 + &s_7;//s_6被移动了，不能继续使用，这是因为+使用了add函数fn add(self, s: &str) -> String
[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/mod_08_collections.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut s_9 = data.to_string();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `blue_score`
[INFO] [stdout]    --> src/mod_08_collections.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 151 |     let blue_score = scores.get(&String::from("blue")).copied().unwrap_or(0);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_blue_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> src/mod_09_error_handling.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mod_09_error_handling.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stdout]    |         ----^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:21:28
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn notify__<T:Summary>(item:&T){
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:26:35
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn notify_<T:Summary+Display>(item:&T){
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn _notify_(item:&(impl Summary+Display)){
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:34:23
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:34:28
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:27
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expensive_closure`
[INFO] [stdout]   --> src/mod_13_01_closure.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let expensive_closure = |num:u32|->u32{//也可以注明参数类型
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_closure`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_one_v2`
[INFO] [stdout]   --> src/mod_13_01_closure.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let add_one_v2 = |x:u32|->u32{ x+1 };
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp`
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_02_guessing_game.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fibonacci` is never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn fibonacci(level:i32)->i32{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_05` is never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn ch_03_05(){
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_04` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn ch_03_04(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_03` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:133:4
[INFO] [stdout]     |
[INFO] [stdout] 133 | fn ch_03_03(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `another_function` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn another_function(x:i32){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `yet_another_function` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `yet_another_function_return_with_bool` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two_number` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn add_two_number(x:i32, y:i32)->i32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_02` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn ch_03_02(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_01` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:192:4
[INFO] [stdout]     |
[INFO] [stdout] 192 | fn ch_03_01(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_04_understanding_owership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_04_03_enter` is never used
[INFO] [stdout]  --> src/mod_04_understanding_owership.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn ch_04_03_enter(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_with_str` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn first_word_with_str(s:&str)->&str{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn first_word(s:&String)->usize{
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_04_enter` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn ch_04_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn do_something(str:String){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something_ref` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn do_something_ref(str:&mut String){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_05_struct_and_example.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct User{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_05_01_enter` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn ch_05_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct Color (i32,i32,i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Point(i32,i32,i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlwaysEqual` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct AlwaysEqual;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_struct` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn tuple_struct(){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_user` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn gen_user(email:String , user_name:String)->User{
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `area`, `can_hold`, `can_hold_area`, and `square` are never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 114 | impl Rectangle{
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 115 |
[INFO] [stdout] 116 |     pub fn new(width_:u32,height_:u32)->Self{
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn area(&self)->u32{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 129 |     pub fn can_hold(&self,other:&Rectangle)->bool{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn can_hold_area(&self,other:&Rectangle)->bool{
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 141 |     fn square(size:u32)->Self{
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_self` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 150 | impl Rectangle{
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 151 |     fn print_self(&self){
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_05_02_enter` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn ch_05_02_enter(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rectangles` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:160:4
[INFO] [stdout]     |
[INFO] [stdout] 160 | fn rectangles(){
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_struct` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:203:4
[INFO] [stdout]     |
[INFO] [stdout] 203 | fn area_struct(rect:&Rectangle)->u32{
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:208:4
[INFO] [stdout]     |
[INFO] [stdout] 208 | fn area(width:u32,height:u32)->u32{
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_dimension` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:212:4
[INFO] [stdout]     |
[INFO] [stdout] 212 | fn area_dimension(dimension:(u32,u32))->u32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKindEnum` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum IpAddrKindEnum{
[INFO] [stdout]    |      ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MessageEnum` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum MessageEnum{
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl MessageEnum{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 27 |     fn call(&self){
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_01_enter` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn ch_06_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum UsState{
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 48 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 49 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` 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 `Coin` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:56:6
[INFO] [stdout]    |
[INFO] [stdout] 56 | enum Coin{
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_02_enter` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn ch_06_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_of_cents` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn value_of_cents(coin:&Coin)->u8{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn plus_one(x:&Option<i32>) -> Option<i32>{
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dice_roll` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn dice_roll(roll_result:&u8){
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_fancy_hat` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:139:4
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn add_fancy_hat(){}
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_fancy_hat` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:140:4
[INFO] [stdout]     |
[INFO] [stdout] 140 | fn remove_fancy_hat(){}
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_player` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn move_player(num_space:&u8){
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `re_roll` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn re_roll(){
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_03_enter` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn ch_06_03_enter() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_07_pachage_and_crates.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_01_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn ch_07_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_02_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn ch_07_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_03_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn ch_07_03_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SpreadSheetCell` is never used
[INFO] [stdout]  --> src/mod_08_collections.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum SpreadSheetCell{
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_01_enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn ch_08_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_02_enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn ch_08_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_03_enter` is never used
[INFO] [stdout]    --> src/mod_08_collections.rs:142:4
[INFO] [stdout]     |
[INFO] [stdout] 142 | fn ch_08_03_enter(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `output_hash_map` is never used
[INFO] [stdout]    --> src/mod_08_collections.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn output_hash_map(hash_set : &HashMap<String,u32>){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_09_error_handling.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_09_01_enter` is never used
[INFO] [stdout]  --> src/mod_09_error_handling.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn ch_09_01_enter(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_09_02_enter` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn ch_09_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_2` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn read_username_from_file_2()->Result<String, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn read_username_from_file()->Result<String, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_unwrap` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn file_unwrap(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_unwrap_expect` is never used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn file_unwrap_expect(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write` is never used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn write(file:&mut File,content:&[u8]){
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/mod_10_01_generics.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Point<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_x` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T> Point<T>{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 11 |     fn get_x(&self)->&T{
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Point<f32>{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 18 |     fn distance_from_origin(&self) -> f32{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_string`, and `return_summarizable` are never used
[INFO] [stdout]   --> src/mod_10_02_trait.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl NewsArticle{
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 59 |     fn new(headline_:String, location_:String, author_:String, content_:String)->Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn to_string(&self){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     fn return_summarizable()->impl Summary{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 98  | impl Tweet{
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 105 |     fn new(username_:String,content_:String,reply_:bool,retweet_:bool)->Self{
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | pub fn enter(){
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/mod_10_02_trait.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 | struct Pair<T>{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:137:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl<T> Pair<T>{
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 137 |     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/mod_10_02_trait.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | impl<T:Display+PartialOrd> Pair<T>{
[INFO] [stdout]     | ---------------------------------- method in this implementation
[INFO] [stdout] 144 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_10_03_lifetime.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn longest<'a>(x:&'a str,y:&'a str) -> &'a str{
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_` is never used
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_11_01_testing.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_13_01_closure.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `Blue` are never constructed
[INFO] [stdout]   --> src/mod_13_01_closure.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 57 | enum ShirtColor{
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 58 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 59 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ShirtColor` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Inventory` is never constructed
[INFO] [stdout]   --> src/mod_13_01_closure.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | struct Inventory{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `give_away`, `most_stocked_`, and `most_stocked` are never used
[INFO] [stdout]   --> src/mod_13_01_closure.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Inventory{
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 67 |
[INFO] [stdout] 68 |     pub fn new(colors_:&Vec<ShirtColor>)->Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn give_away(&self,user_preference:Option<ShirtColor>)->ShirtColor{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn most_stocked_()->ShirtColor{
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn most_stocked(&self)->ShirtColor{
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]    --> src/mod_13_01_closure.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 115 | struct Rectangle{
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 116 |     width:u32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 117 |     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 `sort_by_key` is never used
[INFO] [stdout]    --> src/mod_13_01_closure.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn sort_by_key(){
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `reset` is never used
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl TempStructIter{
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 67 |     fn reset(&mut self){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shoes_in_size` is never used
[INFO] [stdout]    --> src/mod_13_02_iterators.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn shoes_in_size(shoes_:Vec<Shoe>,shoe_size_:u32)->Vec<Shoe>{
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustPrograming_Cases` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_programing_cases`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 |     file.write_all(content);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let _ = file.write_all(content);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 169 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::format`
[INFO] [stdout]  --> src/back_of_house.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::format;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `soup`
[INFO] [stdout]   --> src/lib.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let soup:back_of_house::Appetizer = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_soup`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `salad`
[INFO] [stdout]   --> src/lib.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let salad:back_of_house::Appetizer = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_salad`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deliver_order` is never used
[INFO] [stdout]   --> src/lib.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn deliver_order(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `to_string` is never used
[INFO] [stdout]  --> src/back_of_house.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn to_string(){
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fix_incorrect_order` is never used
[INFO] [stdout]  --> src/back_of_house.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn fix_incorrect_order(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cook_order` is never used
[INFO] [stdout]   --> src/back_of_house.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn cook_order(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]  --> src/front_of_house/hosting.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn seat_at_table(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn take_order(){
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn serve_order(){
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]  --> src/front_of_house/serving.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn take_payment(){
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustPrograming_Cases` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_programing_cases`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::Rng;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_05_struct_and_example.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std:: cmp::Ordering`
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std:: cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `V4_u8` should have an upper camel case name
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     V4_u8(u8,u8,u8,u8),//另一种参数类型的V4枚举
[INFO] [stdout]    |     ^^^^^ help: convert the identifier to upper camel case: `V4U8`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_07_pachage_and_crates.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `io`, `string`
[INFO] [stdout]  --> src/mod_08_collections.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{io, string};
[INFO] [stdout]   |           ^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/mod_08_collections.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `file`
[INFO] [stdout]  --> src/mod_09_error_handling.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{file, fs::File, io::{ErrorKind, Write, Read,self}};
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Error`
[INFO] [stdout]  --> src/mod_09_error_handling.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `clone`, `format`, `string`
[INFO] [stdout]  --> src/mod_10_02_trait.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::{format, Display,Debug}, string, clone};
[INFO] [stdout]   |                 ^^^^^^                  ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string`
[INFO] [stdout]  --> src/mod_10_03_lifetime.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::string;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::mod_tests`
[INFO] [stdout]  --> src/mod_11_01_testing.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::mod_tests;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io`
[INFO] [stdout]  --> src/mod_13_01_closure.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::result`
[INFO] [stdout]  --> src/mod_13_02_iterators.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::result;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     return;
[INFO] [stdout]   |     ------ any code following this expression is unreachable
[INFO] [stdout] 7 |     
[INFO] [stdout] 8 |     ch_03_01();
[INFO] [stdout]   |     ^^^^^^^^^^^ unreachable statement
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 17 |     let hello = &s[0..5];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_09_error_handling.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 23 |     let v = vec![1,2,3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_13_01_closure.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 13 |     let list = vec![1,2,3];
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return;
[INFO] [stdout]    |     ------ any code following this expression is unreachable
[INFO] [stdout] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let x = if contition {1} else {0};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `result` is assigned to, but never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:58:13
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let mut result:i32 = 0;
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_result` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             result = counter;
[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: unused variable: `val`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:147:25
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stdout]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:154:42
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stdout]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let number :u32 = "42".parse().expect("cast faild");
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let f : bool = false;//一个bool类型
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let test : i32 = tup.0;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |     let test : f32 = tup.1;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     let test : &String = &tup.2;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `another_arr`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let another_arr:[i32;5]=[1,2,3,4,5];//主动声明了类型和大小的数组
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let first = arr[0];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |     let second = arr[1];
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |         let x = x * 2;
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello = &s[0..5];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let world = &s[6..11];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_1`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let slice_1 = &s[0..];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_2`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let slice_2 = &s[..len];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice_3`
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let slice_3 = &a[1..3];
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user_4`
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let user_4:User = User{
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_user_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut user_2 = gen_user(String::from("789@xxx.com"),String::from("user_name"));
[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: unused variable: `point`
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let point:Point = Point(0,0,0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `width`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 |     let width:u32 = 50;
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `height`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:162:9
[INFO] [stdout]     |
[INFO] [stdout] 162 |     let height:u32 = 50;
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |     let rect : (u32,u32)= (30,30);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_rect`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_stct`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let rect_stct:Rectangle = Rectangle{
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_stct`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_1`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:180:9
[INFO] [stdout]     |
[INFO] [stdout] 180 |     let rect_test_1:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_2`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let rect_test_2:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rect_test_3`
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:190:9
[INFO] [stdout]     |
[INFO] [stdout] 190 |     let rect_test_3:Rectangle = Rectangle {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let none : IpAddrKindEnum = IpAddrKindEnum::None;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let four : IpAddrKindEnum = IpAddrKindEnum::V4(String::from("123.0.0.1"));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four_another`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let four_another : IpAddrKindEnum = IpAddrKindEnum::V4_u8( 127 , 0 , 0 , 0 );
[INFO] [stdout]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_four_another`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let six : IpAddrKindEnum = IpAddrKindEnum::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v_temp`
[INFO] [stdout]   --> src/mod_08_collections.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let v_temp = vec![1,2,3];//直接使用vec!宏来创建一个类型为Vec<i32>并且保存了元素的集合,Rust会自动推断其类型                            ...
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `third`
[INFO] [stdout]   --> src/mod_08_collections.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let third:&i32 = &v[last];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_third`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/mod_08_collections.rs:83:30
[INFO] [stdout]    |
[INFO] [stdout] 83 |         SpreadSheetCell::Int(t) => println!("t"),
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/mod_08_collections.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     let str = String::new();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s_9`
[INFO] [stdout]   --> src/mod_08_collections.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut s_9 = data.to_string();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_s_9`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s_8` is never read
[INFO] [stdout]    --> src/mod_08_collections.rs:100:13
[INFO] [stdout]     |
[INFO] [stdout] 100 |     let mut s_8 = "initial ccontents".to_string();
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s_8` is never read
[INFO] [stdout]    --> src/mod_08_collections.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     s_8 = s_6 + &s_7;//s_6被移动了，不能继续使用，这是因为+使用了add函数fn add(self, s: &str) -> String
[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/mod_08_collections.rs:99:9
[INFO] [stdout]    |
[INFO] [stdout] 99 |     let mut s_9 = data.to_string();
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `blue_score`
[INFO] [stdout]    --> src/mod_08_collections.rs:151:9
[INFO] [stdout]     |
[INFO] [stdout] 151 |     let blue_score = scores.get(&String::from("blue")).copied().unwrap_or(0);
[INFO] [stdout]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_blue_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> src/mod_09_error_handling.rs:35:13
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stdout]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/mod_09_error_handling.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stdout]    |         ----^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:21:28
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn notify__<T:Summary>(item:&T){
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:26:35
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn notify_<T:Summary+Display>(item:&T){
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 29 |     fn _notify_(item:&(impl Summary+Display)){
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:34:23
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/mod_10_02_trait.rs:34:28
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:27
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |                           ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expensive_closure`
[INFO] [stdout]   --> src/mod_13_01_closure.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let expensive_closure = |num:u32|->u32{//也可以注明参数类型
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_closure`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_one_v2`
[INFO] [stdout]   --> src/mod_13_01_closure.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let add_one_v2 = |x:u32|->u32{ x+1 };
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `temp`
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_temp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_02_guessing_game.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_03_variables_and_mutability.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fibonacci` is never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn fibonacci(level:i32)->i32{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_05` is never used
[INFO] [stdout]   --> src/mod_03_variables_and_mutability.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn ch_03_05(){
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_04` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn ch_03_04(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_03` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:133:4
[INFO] [stdout]     |
[INFO] [stdout] 133 | fn ch_03_03(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `another_function` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn another_function(x:i32){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `yet_another_function` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `yet_another_function_return_with_bool` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:154:4
[INFO] [stdout]     |
[INFO] [stdout] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_two_number` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn add_two_number(x:i32, y:i32)->i32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_02` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | fn ch_03_02(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_03_01` is never used
[INFO] [stdout]    --> src/mod_03_variables_and_mutability.rs:192:4
[INFO] [stdout]     |
[INFO] [stdout] 192 | fn ch_03_01(){
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_04_understanding_owership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_04_03_enter` is never used
[INFO] [stdout]  --> src/mod_04_understanding_owership.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn ch_04_03_enter(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word_with_str` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn first_word_with_str(s:&str)->&str{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn first_word(s:&String)->usize{
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_04_enter` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:53:4
[INFO] [stdout]    |
[INFO] [stdout] 53 | fn ch_04_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn do_something(str:String){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_something_ref` is never used
[INFO] [stdout]   --> src/mod_04_understanding_owership.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn do_something_ref(str:&mut String){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_05_struct_and_example.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct User{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_05_01_enter` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn ch_05_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct Color (i32,i32,i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Point(i32,i32,i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlwaysEqual` is never constructed
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | struct AlwaysEqual;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_struct` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn tuple_struct(){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gen_user` is never used
[INFO] [stdout]   --> src/mod_05_struct_and_example.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn gen_user(email:String , user_name:String)->User{
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area`, `can_hold_area`, and `square` are never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:124:8
[INFO] [stdout]     |
[INFO] [stdout] 114 | impl Rectangle{
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn area(&self)->u32{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn can_hold_area(&self,other:&Rectangle)->bool{
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 141 |     fn square(size:u32)->Self{
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print_self` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 150 | impl Rectangle{
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] 151 |     fn print_self(&self){
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_05_02_enter` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:156:4
[INFO] [stdout]     |
[INFO] [stdout] 156 | fn ch_05_02_enter(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rectangles` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:160:4
[INFO] [stdout]     |
[INFO] [stdout] 160 | fn rectangles(){
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_struct` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:203:4
[INFO] [stdout]     |
[INFO] [stdout] 203 | fn area_struct(rect:&Rectangle)->u32{
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:208:4
[INFO] [stdout]     |
[INFO] [stdout] 208 | fn area(width:u32,height:u32)->u32{
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_dimension` is never used
[INFO] [stdout]    --> src/mod_05_struct_and_example.rs:212:4
[INFO] [stdout]     |
[INFO] [stdout] 212 | fn area_dimension(dimension:(u32,u32))->u32{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_06_enum_match_if_let.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddrKindEnum` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum IpAddrKindEnum{
[INFO] [stdout]    |      ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MessageEnum` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:18:6
[INFO] [stdout]    |
[INFO] [stdout] 18 | enum MessageEnum{
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl MessageEnum{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 27 |     fn call(&self){
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_01_enter` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn ch_06_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum UsState{
[INFO] [stdout]    |      ------- variants in this enum
[INFO] [stdout] 48 |     Alabama,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 49 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` 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 `Coin` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:56:6
[INFO] [stdout]    |
[INFO] [stdout] 56 | enum Coin{
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_02_enter` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn ch_06_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_of_cents` is never used
[INFO] [stdout]   --> src/mod_06_enum_match_if_let.rs:74:4
[INFO] [stdout]    |
[INFO] [stdout] 74 | fn value_of_cents(coin:&Coin)->u8{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn plus_one(x:&Option<i32>) -> Option<i32>{
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dice_roll` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn dice_roll(roll_result:&u8){
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_fancy_hat` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:139:4
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn add_fancy_hat(){}
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_fancy_hat` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:140:4
[INFO] [stdout]     |
[INFO] [stdout] 140 | fn remove_fancy_hat(){}
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_player` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn move_player(num_space:&u8){
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `re_roll` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn re_roll(){
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_06_03_enter` is never used
[INFO] [stdout]    --> src/mod_06_enum_match_if_let.rs:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | fn ch_06_03_enter() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_07_pachage_and_crates.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_01_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn ch_07_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_02_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn ch_07_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_07_03_enter` is never used
[INFO] [stdout]   --> src/mod_07_pachage_and_crates.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn ch_07_03_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `SpreadSheetCell` is never used
[INFO] [stdout]  --> src/mod_08_collections.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum SpreadSheetCell{
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_01_enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn ch_08_01_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_02_enter` is never used
[INFO] [stdout]   --> src/mod_08_collections.rs:93:4
[INFO] [stdout]    |
[INFO] [stdout] 93 | fn ch_08_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_08_03_enter` is never used
[INFO] [stdout]    --> src/mod_08_collections.rs:142:4
[INFO] [stdout]     |
[INFO] [stdout] 142 | fn ch_08_03_enter(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `output_hash_map` is never used
[INFO] [stdout]    --> src/mod_08_collections.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn output_hash_map(hash_set : &HashMap<String,u32>){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_09_error_handling.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_09_01_enter` is never used
[INFO] [stdout]  --> src/mod_09_error_handling.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn ch_09_01_enter(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ch_09_02_enter` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn ch_09_02_enter(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_2` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn read_username_from_file_2()->Result<String, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:80:4
[INFO] [stdout]    |
[INFO] [stdout] 80 | fn read_username_from_file()->Result<String, io::Error>{
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_unwrap` is never used
[INFO] [stdout]   --> src/mod_09_error_handling.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn file_unwrap(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_unwrap_expect` is never used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn file_unwrap_expect(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write` is never used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | fn write(file:&mut File,content:&[u8]){
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/mod_10_01_generics.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Point<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_x` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T> Point<T>{
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 11 |     fn get_x(&self)->&T{
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `distance_from_origin` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Point<f32>{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 18 |     fn distance_from_origin(&self) -> f32{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_10_01_generics.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `to_string`, and `return_summarizable` are never used
[INFO] [stdout]   --> src/mod_10_02_trait.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl NewsArticle{
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 59 |     fn new(headline_:String, location_:String, author_:String, content_:String)->Self{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn to_string(&self){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |     fn return_summarizable()->impl Summary{
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 98  | impl Tweet{
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 105 |     fn new(username_:String,content_:String,reply_:bool,retweet_:bool)->Self{
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:115:8
[INFO] [stdout]     |
[INFO] [stdout] 115 | pub fn enter(){
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]    --> src/mod_10_02_trait.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 130 | struct Pair<T>{
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/mod_10_02_trait.rs:137:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl<T> Pair<T>{
[INFO] [stdout]     | --------------- associated function in this implementation
[INFO] [stdout] 137 |     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/mod_10_02_trait.rs:144:8
[INFO] [stdout]     |
[INFO] [stdout] 143 | impl<T:Display+PartialOrd> Pair<T>{
[INFO] [stdout]     | ---------------------------------- method in this implementation
[INFO] [stdout] 144 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_10_03_lifetime.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn longest<'a>(x:&'a str,y:&'a str) -> &'a str{
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_` is never used
[INFO] [stdout]   --> src/mod_10_03_lifetime.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/mod_11_01_testing.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn enter(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]  --> src/mod_13_01_closure.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn enter(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red` and `Blue` are never constructed
[INFO] [stdout]   --> src/mod_13_01_closure.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 57 | enum ShirtColor{
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 58 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 59 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ShirtColor` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Inventory` is never constructed
[INFO] [stdout]   --> src/mod_13_01_closure.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | struct Inventory{
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `give_away`, `most_stocked_`, and `most_stocked` are never used
[INFO] [stdout]   --> src/mod_13_01_closure.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Inventory{
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 67 |
[INFO] [stdout] 68 |     pub fn new(colors_:&Vec<ShirtColor>)->Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn give_away(&self,user_preference:Option<ShirtColor>)->ShirtColor{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn most_stocked_()->ShirtColor{
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn most_stocked(&self)->ShirtColor{
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]    --> src/mod_13_01_closure.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 115 | struct Rectangle{
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 116 |     width:u32,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 117 |     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 `sort_by_key` is never used
[INFO] [stdout]    --> src/mod_13_01_closure.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn sort_by_key(){
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `reset` is never used
[INFO] [stdout]   --> src/mod_13_02_iterators.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl TempStructIter{
[INFO] [stdout]    | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 67 |     fn reset(&mut self){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/mod_tests.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn run(){
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustPrograming_Cases` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_programing_cases`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/mod_09_error_handling.rs:109:5
[INFO] [stdout]     |
[INFO] [stdout] 109 |     file.write_all(content);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let _ = file.write_all(content);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 168 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "83d7901a95871307d725e6f14066e81f2c3ecd81a4d7aa96be5f840807c56b01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83d7901a95871307d725e6f14066e81f2c3ecd81a4d7aa96be5f840807c56b01", kill_on_drop: false }`
[INFO] [stdout] 83d7901a95871307d725e6f14066e81f2c3ecd81a4d7aa96be5f840807c56b01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 27bb71f31b919a847da53f49abc54a49e02321f46ba88e170c220fb2771895c1
[INFO] running `Command { std: "docker" "start" "-a" "27bb71f31b919a847da53f49abc54a49e02321f46ba88e170c220fb2771895c1", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt::format`
[INFO] [stderr]  --> src/back_of_house.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt::format;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `soup`
[INFO] [stderr]   --> src/lib.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let soup:back_of_house::Appetizer = back_of_house::Appetizer::Soup;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_soup`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `salad`
[INFO] [stderr]   --> src/lib.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let salad:back_of_house::Appetizer = back_of_house::Appetizer::Salad;
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_salad`
[INFO] [stderr] 
[INFO] [stderr] warning: function `deliver_order` is never used
[INFO] [stderr]   --> src/lib.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn deliver_order(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `to_string` is never used
[INFO] [stderr]  --> src/back_of_house.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn to_string(){
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `fix_incorrect_order` is never used
[INFO] [stderr]  --> src/back_of_house.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn fix_incorrect_order(){
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `cook_order` is never used
[INFO] [stderr]   --> src/back_of_house.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn cook_order(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `seat_at_table` is never used
[INFO] [stderr]  --> src/front_of_house/hosting.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn seat_at_table(){
[INFO] [stderr]   |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `take_order` is never used
[INFO] [stderr]  --> src/front_of_house/serving.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn take_order(){
[INFO] [stderr]   |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `serve_order` is never used
[INFO] [stderr]  --> src/front_of_house/serving.rs:5:4
[INFO] [stderr]   |
[INFO] [stderr] 5 | fn serve_order(){
[INFO] [stderr]   |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `take_payment` is never used
[INFO] [stderr]  --> src/front_of_house/serving.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn take_payment(){
[INFO] [stderr]   |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate `RustPrograming_Cases` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = help: convert the identifier to snake case: `rust_programing_cases`
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `RustPrograming_Cases` (lib) generated 13 warnings (run `cargo fix --lib -p RustPrograming_Cases` to apply 4 suggestions)
[INFO] [stderr] warning: `RustPrograming_Cases` (lib test) generated 13 warnings (13 duplicates)
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/mod_03_variables_and_mutability.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/mod_05_struct_and_example.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/mod_06_enum_match_if_let.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std:: cmp::Ordering`
[INFO] [stderr]  --> src/mod_06_enum_match_if_let.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std:: cmp::Ordering;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `V4_u8` should have an upper camel case name
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     V4_u8(u8,u8,u8,u8),//另一种参数类型的V4枚举
[INFO] [stderr]    |     ^^^^^ help: convert the identifier to upper camel case: `V4U8`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/mod_07_pachage_and_crates.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `io`, `string`
[INFO] [stderr]  --> src/mod_08_collections.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{io, string};
[INFO] [stderr]   |           ^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/mod_08_collections.rs:2:33
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `file`
[INFO] [stderr]  --> src/mod_09_error_handling.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{file, fs::File, io::{ErrorKind, Write, Read,self}};
[INFO] [stderr]   |           ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Error`
[INFO] [stderr]  --> src/mod_09_error_handling.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `clone`, `format`, `string`
[INFO] [stderr]  --> src/mod_10_02_trait.rs:1:17
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::{fmt::{format, Display,Debug}, string, clone};
[INFO] [stderr]   |                 ^^^^^^                  ^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::string`
[INFO] [stderr]  --> src/mod_10_03_lifetime.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::string;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::mod_tests`
[INFO] [stderr]  --> src/mod_11_01_testing.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::mod_tests;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io`
[INFO] [stderr]  --> src/mod_13_01_closure.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::result`
[INFO] [stderr]  --> src/mod_13_02_iterators.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::result;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::mod_05_struct_and_example::Rectangle`
[INFO] [stderr]   --> src/mod_tests.rs:1:5
[INFO] [stderr]    |
[INFO] [stderr] 1  | use crate::mod_05_struct_and_example::Rectangle;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stderr]   --> src/main.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | mod mod_tests;
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]  --> src/mod_03_variables_and_mutability.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     return;
[INFO] [stderr]   |     ------ any code following this expression is unreachable
[INFO] [stderr] 7 |     
[INFO] [stderr] 8 |     ch_03_01();
[INFO] [stderr]   |     ^^^^^^^^^^^ unreachable statement
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     return;
[INFO] [stderr]    |     ------ any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 17 |     let hello = &s[0..5];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/mod_09_error_handling.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     return;
[INFO] [stderr]    |     ------ any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 23 |     let v = vec![1,2,3];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/mod_13_01_closure.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 8  |     return;
[INFO] [stderr]    |     ------ any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 13 |     let list = vec![1,2,3];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/mod_13_02_iterators.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     return;
[INFO] [stderr]    |     ------ any code following this expression is unreachable
[INFO] [stderr] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/mod_03_variables_and_mutability.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let x = if contition {1} else {0};
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `result` is assigned to, but never used
[INFO] [stderr]   --> src/mod_03_variables_and_mutability.rs:58:13
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let mut result:i32 = 0;
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_result` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/mod_03_variables_and_mutability.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 71 |             result = counter;
[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: unused variable: `val`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:147:25
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stderr]     |                         ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `val`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:154:42
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stderr]     |                                          ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `number`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:166:9
[INFO] [stderr]     |
[INFO] [stderr] 166 |     let number :u32 = "42".parse().expect("cast faild");
[INFO] [stderr]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:168:9
[INFO] [stderr]     |
[INFO] [stderr] 168 |     let f : bool = false;//一个bool类型
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |     let test : i32 = tup.0;
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:179:9
[INFO] [stderr]     |
[INFO] [stderr] 179 |     let test : f32 = tup.1;
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `test`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |     let test : &String = &tup.2;
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `another_arr`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |     let another_arr:[i32;5]=[1,2,3,4,5];//主动声明了类型和大小的数组
[INFO] [stderr]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_arr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |     let first = arr[0];
[INFO] [stderr]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `second`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |     let second = arr[1];
[INFO] [stderr]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:204:13
[INFO] [stderr]     |
[INFO] [stderr] 204 |         let x = x * 2;
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let hello = &s[0..5];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `world`
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let world = &s[6..11];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slice_1`
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let slice_1 = &s[0..];
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slice_2`
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let slice_2 = &s[..len];
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slice_3`
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let slice_3 = &a[1..3];
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice_3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user_4`
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let user_4:User = User{
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_user_4`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let mut user_2 = gen_user(String::from("789@xxx.com"),String::from("user_name"));
[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: unused variable: `point`
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let point:Point = Point(0,0,0);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `width`
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:161:9
[INFO] [stderr]     |
[INFO] [stderr] 161 |     let width:u32 = 50;
[INFO] [stderr]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `height`
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:162:9
[INFO] [stderr]     |
[INFO] [stderr] 162 |     let height:u32 = 50;
[INFO] [stderr]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_height`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rect`
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:164:9
[INFO] [stderr]     |
[INFO] [stderr] 164 |     let rect : (u32,u32)= (30,30);
[INFO] [stderr]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_rect`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rect_stct`
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:166:9
[INFO] [stderr]     |
[INFO] [stderr] 166 |     let rect_stct:Rectangle = Rectangle{
[INFO] [stderr]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_stct`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rect_test_1`
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:180:9
[INFO] [stderr]     |
[INFO] [stderr] 180 |     let rect_test_1:Rectangle = Rectangle {
[INFO] [stderr]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rect_test_2`
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |     let rect_test_2:Rectangle = Rectangle {
[INFO] [stderr]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rect_test_3`
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:190:9
[INFO] [stderr]     |
[INFO] [stderr] 190 |     let rect_test_3:Rectangle = Rectangle {
[INFO] [stderr]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rect_test_3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `none`
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let none : IpAddrKindEnum = IpAddrKindEnum::None;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let four : IpAddrKindEnum = IpAddrKindEnum::V4(String::from("123.0.0.1"));
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four_another`
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let four_another : IpAddrKindEnum = IpAddrKindEnum::V4_u8( 127 , 0 , 0 , 0 );
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_four_another`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |     let six : IpAddrKindEnum = IpAddrKindEnum::V6(String::from("::1"));
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v_temp`
[INFO] [stderr]   --> src/mod_08_collections.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let v_temp = vec![1,2,3];//直接使用vec!宏来创建一个类型为Vec<i32>并且保存了元素的集合,Rust会自动推断其类型                            ...
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_temp`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `third`
[INFO] [stderr]   --> src/mod_08_collections.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let third:&i32 = &v[last];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_third`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/mod_08_collections.rs:83:30
[INFO] [stderr]    |
[INFO] [stderr] 83 |         SpreadSheetCell::Int(t) => println!("t"),
[INFO] [stderr]    |                              ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]   --> src/mod_08_collections.rs:97:9
[INFO] [stderr]    |
[INFO] [stderr] 97 |     let str = String::new();
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s_9`
[INFO] [stderr]   --> src/mod_08_collections.rs:99:13
[INFO] [stderr]    |
[INFO] [stderr] 99 |     let mut s_9 = data.to_string();
[INFO] [stderr]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_s_9`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `s_8` is never read
[INFO] [stderr]    --> src/mod_08_collections.rs:100:13
[INFO] [stderr]     |
[INFO] [stderr] 100 |     let mut s_8 = "initial ccontents".to_string();
[INFO] [stderr]     |             ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `s_8` is never read
[INFO] [stderr]    --> src/mod_08_collections.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 |     s_8 = s_6 + &s_7;//s_6被移动了，不能继续使用，这是因为+使用了add函数fn add(self, s: &str) -> String
[INFO] [stderr]     |     ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/mod_08_collections.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |     let mut s_9 = data.to_string();
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `blue_score`
[INFO] [stderr]    --> src/mod_08_collections.rs:151:9
[INFO] [stderr]     |
[INFO] [stderr] 151 |     let blue_score = scores.get(&String::from("blue")).copied().unwrap_or(0);
[INFO] [stderr]     |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_blue_score`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `greeting_file`
[INFO] [stderr]   --> src/mod_09_error_handling.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/mod_09_error_handling.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let mut greeting_file = match greeting_file_result {
[INFO] [stderr]    |         ----^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mod_10_02_trait.rs:21:28
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn notify__<T:Summary>(item:&T){
[INFO] [stderr]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mod_10_02_trait.rs:26:35
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn notify_<T:Summary+Display>(item:&T){
[INFO] [stderr]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/mod_10_02_trait.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn _notify_(item:&(impl Summary+Display)){
[INFO] [stderr]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/mod_10_02_trait.rs:34:23
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stderr]    |                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/mod_10_02_trait.rs:34:28
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn _notify__<T,U>(t:&T,u:&U)->i32
[INFO] [stderr]    |                            ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/mod_10_03_lifetime.rs:66:17
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/mod_10_03_lifetime.rs:66:27
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stderr]    |                           ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `expensive_closure`
[INFO] [stderr]   --> src/mod_13_01_closure.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let expensive_closure = |num:u32|->u32{//也可以注明参数类型
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_closure`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `add_one_v2`
[INFO] [stderr]   --> src/mod_13_01_closure.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let add_one_v2 = |x:u32|->u32{ x+1 };
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `temp`
[INFO] [stderr]   --> src/mod_13_02_iterators.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let temp:Vec<i32> = Vec::new();
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_temp`
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_02_guessing_game.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_03_variables_and_mutability.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `fibonacci` is never used
[INFO] [stderr]   --> src/mod_03_variables_and_mutability.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn fibonacci(level:i32)->i32{
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_03_05` is never used
[INFO] [stderr]   --> src/mod_03_variables_and_mutability.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn ch_03_05(){
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_03_04` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:129:4
[INFO] [stderr]     |
[INFO] [stderr] 129 | fn ch_03_04(){
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_03_03` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:133:4
[INFO] [stderr]     |
[INFO] [stderr] 133 | fn ch_03_03(){
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `another_function` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:141:4
[INFO] [stderr]     |
[INFO] [stderr] 141 | fn another_function(x:i32){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `yet_another_function` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:147:4
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn yet_another_function(val:i32)->i32{
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `yet_another_function_return_with_bool` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:154:4
[INFO] [stderr]     |
[INFO] [stderr] 154 | fn yet_another_function_return_with_bool(val:i32)->bool{
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_two_number` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:158:4
[INFO] [stderr]     |
[INFO] [stderr] 158 | fn add_two_number(x:i32, y:i32)->i32{
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_03_02` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:162:4
[INFO] [stderr]     |
[INFO] [stderr] 162 | fn ch_03_02(){
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_03_01` is never used
[INFO] [stderr]    --> src/mod_03_variables_and_mutability.rs:192:4
[INFO] [stderr]     |
[INFO] [stderr] 192 | fn ch_03_01(){
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_04_understanding_owership.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_04_03_enter` is never used
[INFO] [stderr]  --> src/mod_04_understanding_owership.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn ch_04_03_enter(){
[INFO] [stderr]   |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_word_with_str` is never used
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn first_word_with_str(s:&str)->&str{
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_word` is never used
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:40:4
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn first_word(s:&String)->usize{
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_04_enter` is never used
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:53:4
[INFO] [stderr]    |
[INFO] [stderr] 53 | fn ch_04_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `do_something` is never used
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:74:4
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn do_something(str:String){
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `do_something_ref` is never used
[INFO] [stderr]   --> src/mod_04_understanding_owership.rs:80:4
[INFO] [stderr]    |
[INFO] [stderr] 80 | fn do_something_ref(str:&mut String){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_05_struct_and_example.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | struct User{
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_05_01_enter` is never used
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn ch_05_01_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Color` is never constructed
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | struct Color (i32,i32,i32);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 | struct Point(i32,i32,i32);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `AlwaysEqual` is never constructed
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:60:8
[INFO] [stderr]    |
[INFO] [stderr] 60 | struct AlwaysEqual;
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `tuple_struct` is never used
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn tuple_struct(){
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `gen_user` is never used
[INFO] [stderr]   --> src/mod_05_struct_and_example.rs:73:4
[INFO] [stderr]    |
[INFO] [stderr] 73 | fn gen_user(email:String , user_name:String)->User{
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `area`, `can_hold`, `can_hold_area`, and `square` are never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:116:12
[INFO] [stderr]     |
[INFO] [stderr] 114 | impl Rectangle{
[INFO] [stderr]     | -------------- associated items in this implementation
[INFO] [stderr] 115 |
[INFO] [stderr] 116 |     pub fn new(width_:u32,height_:u32)->Self{
[INFO] [stderr]     |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 124 |     fn area(&self)->u32{
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 129 |     pub fn can_hold(&self,other:&Rectangle)->bool{
[INFO] [stderr]     |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 134 |     fn can_hold_area(&self,other:&Rectangle)->bool{
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 141 |     fn square(size:u32)->Self{
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `print_self` is never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:151:8
[INFO] [stderr]     |
[INFO] [stderr] 150 | impl Rectangle{
[INFO] [stderr]     | -------------- method in this implementation
[INFO] [stderr] 151 |     fn print_self(&self){
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_05_02_enter` is never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:156:4
[INFO] [stderr]     |
[INFO] [stderr] 156 | fn ch_05_02_enter(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `rectangles` is never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:160:4
[INFO] [stderr]     |
[INFO] [stderr] 160 | fn rectangles(){
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `area_struct` is never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:203:4
[INFO] [stderr]     |
[INFO] [stderr] 203 | fn area_struct(rect:&Rectangle)->u32{
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `area` is never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:208:4
[INFO] [stderr]     |
[INFO] [stderr] 208 | fn area(width:u32,height:u32)->u32{
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `area_dimension` is never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:212:4
[INFO] [stderr]     |
[INFO] [stderr] 212 | fn area_dimension(dimension:(u32,u32))->u32{
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_06_enum_match_if_let.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `IpAddrKindEnum` is never used
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:10:6
[INFO] [stderr]    |
[INFO] [stderr] 10 | enum IpAddrKindEnum{
[INFO] [stderr]    |      ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `MessageEnum` is never used
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:18:6
[INFO] [stderr]    |
[INFO] [stderr] 18 | enum MessageEnum{
[INFO] [stderr]    |      ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `call` is never used
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | impl MessageEnum{
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] 27 |     fn call(&self){
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_06_01_enter` is never used
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn ch_06_01_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Alabama` and `Alaska` are never constructed
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 47 | enum UsState{
[INFO] [stderr]    |      ------- variants in this enum
[INFO] [stderr] 48 |     Alabama,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 49 |     Alaska,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Coin` is never used
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:56:6
[INFO] [stderr]    |
[INFO] [stderr] 56 | enum Coin{
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_06_02_enter` is never used
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn ch_06_02_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `value_of_cents` is never used
[INFO] [stderr]   --> src/mod_06_enum_match_if_let.rs:74:4
[INFO] [stderr]    |
[INFO] [stderr] 74 | fn value_of_cents(coin:&Coin)->u8{
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `plus_one` is never used
[INFO] [stderr]    --> src/mod_06_enum_match_if_let.rs:113:4
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn plus_one(x:&Option<i32>) -> Option<i32>{
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `dice_roll` is never used
[INFO] [stderr]    --> src/mod_06_enum_match_if_let.rs:121:4
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn dice_roll(roll_result:&u8){
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_fancy_hat` is never used
[INFO] [stderr]    --> src/mod_06_enum_match_if_let.rs:139:4
[INFO] [stderr]     |
[INFO] [stderr] 139 | fn add_fancy_hat(){}
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `remove_fancy_hat` is never used
[INFO] [stderr]    --> src/mod_06_enum_match_if_let.rs:140:4
[INFO] [stderr]     |
[INFO] [stderr] 140 | fn remove_fancy_hat(){}
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `move_player` is never used
[INFO] [stderr]    --> src/mod_06_enum_match_if_let.rs:141:4
[INFO] [stderr]     |
[INFO] [stderr] 141 | fn move_player(num_space:&u8){
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `re_roll` is never used
[INFO] [stderr]    --> src/mod_06_enum_match_if_let.rs:144:4
[INFO] [stderr]     |
[INFO] [stderr] 144 | fn re_roll(){
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_06_03_enter` is never used
[INFO] [stderr]    --> src/mod_06_enum_match_if_let.rs:148:4
[INFO] [stderr]     |
[INFO] [stderr] 148 | fn ch_06_03_enter() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_07_pachage_and_crates.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_07_01_enter` is never used
[INFO] [stderr]   --> src/mod_07_pachage_and_crates.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn ch_07_01_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_07_02_enter` is never used
[INFO] [stderr]   --> src/mod_07_pachage_and_crates.rs:23:4
[INFO] [stderr]    |
[INFO] [stderr] 23 | fn ch_07_02_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_07_03_enter` is never used
[INFO] [stderr]   --> src/mod_07_pachage_and_crates.rs:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn ch_07_03_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `SpreadSheetCell` is never used
[INFO] [stderr]  --> src/mod_08_collections.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | enum SpreadSheetCell{
[INFO] [stderr]   |      ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]   --> src/mod_08_collections.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn enter(){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_08_01_enter` is never used
[INFO] [stderr]   --> src/mod_08_collections.rs:18:4
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn ch_08_01_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_08_02_enter` is never used
[INFO] [stderr]   --> src/mod_08_collections.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn ch_08_02_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_08_03_enter` is never used
[INFO] [stderr]    --> src/mod_08_collections.rs:142:4
[INFO] [stderr]     |
[INFO] [stderr] 142 | fn ch_08_03_enter(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `output_hash_map` is never used
[INFO] [stderr]    --> src/mod_08_collections.rs:194:4
[INFO] [stderr]     |
[INFO] [stderr] 194 | fn output_hash_map(hash_set : &HashMap<String,u32>){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_09_error_handling.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_09_01_enter` is never used
[INFO] [stderr]  --> src/mod_09_error_handling.rs:9:4
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn ch_09_01_enter(){
[INFO] [stderr]   |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `ch_09_02_enter` is never used
[INFO] [stderr]   --> src/mod_09_error_handling.rs:28:4
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn ch_09_02_enter(){
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_username_from_file_2` is never used
[INFO] [stderr]   --> src/mod_09_error_handling.rs:64:4
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn read_username_from_file_2()->Result<String, io::Error>{
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_username_from_file` is never used
[INFO] [stderr]   --> src/mod_09_error_handling.rs:80:4
[INFO] [stderr]    |
[INFO] [stderr] 80 | fn read_username_from_file()->Result<String, io::Error>{
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `file_unwrap` is never used
[INFO] [stderr]   --> src/mod_09_error_handling.rs:96:4
[INFO] [stderr]    |
[INFO] [stderr] 96 | fn file_unwrap(){
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `file_unwrap_expect` is never used
[INFO] [stderr]    --> src/mod_09_error_handling.rs:102:4
[INFO] [stderr]     |
[INFO] [stderr] 102 | fn file_unwrap_expect(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `write` is never used
[INFO] [stderr]    --> src/mod_09_error_handling.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn write(file:&mut File,content:&[u8]){
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]  --> src/mod_10_01_generics.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Point<T>{
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `get_x` is never used
[INFO] [stderr]   --> src/mod_10_01_generics.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl<T> Point<T>{
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] 11 |     fn get_x(&self)->&T{
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `distance_from_origin` is never used
[INFO] [stderr]   --> src/mod_10_01_generics.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | impl Point<f32>{
[INFO] [stderr]    | --------------- method in this implementation
[INFO] [stderr] 18 |     fn distance_from_origin(&self) -> f32{
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]   --> src/mod_10_01_generics.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn enter(){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `to_string`, and `return_summarizable` are never used
[INFO] [stderr]   --> src/mod_10_02_trait.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 58 | impl NewsArticle{
[INFO] [stderr]    | ---------------- associated items in this implementation
[INFO] [stderr] 59 |     fn new(headline_:String, location_:String, author_:String, content_:String)->Self{
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 68 |     fn to_string(&self){
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 73 |     fn return_summarizable()->impl Summary{
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/mod_10_02_trait.rs:105:8
[INFO] [stderr]     |
[INFO] [stderr] 98  | impl Tweet{
[INFO] [stderr]     | ---------- associated function in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 105 |     fn new(username_:String,content_:String,reply_:bool,retweet_:bool)->Self{
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]    --> src/mod_10_02_trait.rs:115:8
[INFO] [stderr]     |
[INFO] [stderr] 115 | pub fn enter(){
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Pair` is never constructed
[INFO] [stderr]    --> src/mod_10_02_trait.rs:130:8
[INFO] [stderr]     |
[INFO] [stderr] 130 | struct Pair<T>{
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> src/mod_10_02_trait.rs:137:8
[INFO] [stderr]     |
[INFO] [stderr] 136 | impl<T> Pair<T>{
[INFO] [stderr]     | --------------- associated function in this implementation
[INFO] [stderr] 137 |     fn new (x_:T,y_:T)->Self{
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `cmp_display` is never used
[INFO] [stderr]    --> src/mod_10_02_trait.rs:144:8
[INFO] [stderr]     |
[INFO] [stderr] 143 | impl<T:Display+PartialOrd> Pair<T>{
[INFO] [stderr]     | ---------------------------------- method in this implementation
[INFO] [stderr] 144 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_10_03_lifetime.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest` is never used
[INFO] [stderr]   --> src/mod_10_03_lifetime.rs:46:4
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn longest<'a>(x:&'a str,y:&'a str) -> &'a str{
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest_` is never used
[INFO] [stderr]   --> src/mod_10_03_lifetime.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn longest_<'a>(x:&'a str,y:&'a str) -> String{
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]   --> src/mod_11_01_testing.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn enter(){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `enter` is never used
[INFO] [stderr]  --> src/mod_13_01_closure.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn enter(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Red` and `Blue` are never constructed
[INFO] [stderr]   --> src/mod_13_01_closure.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 57 | enum ShirtColor{
[INFO] [stderr]    |      ---------- variants in this enum
[INFO] [stderr] 58 |     Red,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 59 |     Blue,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `ShirtColor` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Inventory` is never constructed
[INFO] [stderr]   --> src/mod_13_01_closure.rs:62:8
[INFO] [stderr]    |
[INFO] [stderr] 62 | struct Inventory{
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `give_away`, `most_stocked_`, and `most_stocked` are never used
[INFO] [stderr]   --> src/mod_13_01_closure.rs:68:12
[INFO] [stderr]    |
[INFO] [stderr] 66 | impl Inventory{
[INFO] [stderr]    | -------------- associated items in this implementation
[INFO] [stderr] 67 |
[INFO] [stderr] 68 |     pub fn new(colors_:&Vec<ShirtColor>)->Self{
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 80 |     pub fn give_away(&self,user_preference:Option<ShirtColor>)->ShirtColor{
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 89 |     fn most_stocked_()->ShirtColor{
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 95 |     fn most_stocked(&self)->ShirtColor{
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `width` and `height` are never read
[INFO] [stderr]    --> src/mod_13_01_closure.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 115 | struct Rectangle{
[INFO] [stderr]     |        --------- fields in this struct
[INFO] [stderr] 116 |     width:u32,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 117 |     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: function `sort_by_key` is never used
[INFO] [stderr]    --> src/mod_13_01_closure.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn sort_by_key(){
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `reset` is never used
[INFO] [stderr]   --> src/mod_13_02_iterators.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | impl TempStructIter{
[INFO] [stderr]    | ------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 67 |     fn reset(&mut self){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `shoes_in_size` is never used
[INFO] [stderr]    --> src/mod_13_02_iterators.rs:107:4
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn shoes_in_size(shoes_:Vec<Shoe>,shoe_size_:u32)->Vec<Shoe>{
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/mod_09_error_handling.rs:109:5
[INFO] [stderr]     |
[INFO] [stderr] 109 |     file.write_all(content);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 109 |     let _ = file.write_all(content);
[INFO] [stderr]     |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `area`, `can_hold_area`, and `square` are never used
[INFO] [stderr]    --> src/mod_05_struct_and_example.rs:124:8
[INFO] [stderr]     |
[INFO] [stderr] 114 | impl Rectangle{
[INFO] [stderr]     | -------------- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 124 |     fn area(&self)->u32{
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 134 |     fn can_hold_area(&self,other:&Rectangle)->bool{
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 141 |     fn square(size:u32)->Self{
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/mod_tests.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn run(){
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `RustPrograming_Cases` (bin "RustPrograming_Cases") generated 169 warnings (1 duplicate) (run `cargo fix --bin "RustPrograming_Cases"` to apply 67 suggestions)
[INFO] [stderr] warning: `RustPrograming_Cases` (bin "RustPrograming_Cases" test) generated 168 warnings (166 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/RustPrograming_Cases-3c073c9dd796a16a)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/RustPrograming_Cases-f325412aad85a47b)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test mod_tests::ignore_fn ... ignored
[INFO] [stdout] test mod_tests::exploration ... ok
[INFO] [stdout] test mod_13_02_iterators::filters_by_size ... ok
[INFO] [stdout] test mod_tests::it_works ... ok
[INFO] [stdout] test mod_tests::larger_can_hold_smaller ... ok
[INFO] [stdout] test mod_tests::it_doesnt_work ... FAILED
[INFO] [stdout] test mod_tests::panic ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- mod_tests::it_doesnt_work stdout ----
[INFO] [stdout] thread 'mod_tests::it_doesnt_work' panicked at src/mod_tests.rs:41:5:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: 2
[INFO] [stdout]  right: 3
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x563a1d53c04c - std::backtrace_rs::backtrace::libunwind::trace::ha637c64ce894333a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x563a1d53c04c - std::backtrace_rs::backtrace::trace_unsynchronized::h47f62dea28e0c88d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x563a1d53c04c - std::sys_common::backtrace::_print_fmt::h9eef0abe20ede486
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x563a1d53c04c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hed7f999df88cc644
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x563a1d565b90 - core::fmt::rt::Argument::fmt::h1539a9308b8d058d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x563a1d565b90 - core::fmt::write::h3a39390d8560d9c9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x563a1d5399ff - std::io::Write::write_fmt::h040b369f3a0f9cbc
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:1762:15
[INFO] [stdout]    7:     0x563a1d53be34 - std::sys_common::backtrace::_print::h894006fb5c6f3d45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x563a1d53be34 - std::sys_common::backtrace::print::h23a2d212c6fff936
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x563a1d53daf7 - std::panicking::default_hook::{{closure}}::h8a1d2ee00185001a
[INFO] [stdout]   10:     0x563a1d53d7e3 - std::panicking::default_hook::h6038f2eba384e475
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x563a1d50ddd7 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0ad024c9bdc6d768
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   12:     0x563a1d50ddd7 - test::test_main::{{closure}}::h7500b54257359db6
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x563a1d53e108 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1f8f335eaa9cfaee
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   14:     0x563a1d53e108 - std::panicking::rust_panic_with_hook::h2b5517d590cab22e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x563a1d53de5e - std::panicking::begin_panic_handler::{{closure}}::h233112c06e0ef43e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:657:13
[INFO] [stdout]   16:     0x563a1d53c516 - std::sys_common::backtrace::__rust_end_short_backtrace::h6e893f24d7ebbff8
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stdout]   17:     0x563a1d53dbc2 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x563a1d4d2cf5 - core::panicking::panic_fmt::hbf0e066aabfa482c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x563a1d4d310b - core::panicking::assert_failed_inner::h0bba8b7c26ee4492
[INFO] [stdout]   20:     0x563a1d517f9e - core::panicking::assert_failed::h2ef4b8b4750691c2
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:279:5
[INFO] [stdout]   21:     0x563a1d4da2ae - RustPrograming_Cases::mod_tests::it_doesnt_work::hcf15fc1ec7211705
[INFO] [stdout]                                at /opt/rustwide/workdir/src/mod_tests.rs:41:5
[INFO] [stdout]   22:     0x563a1d4da1f7 - RustPrograming_Cases::mod_tests::it_doesnt_work::{{closure}}::h1f6f94a6990a5bfc
[INFO] [stdout]                                at /opt/rustwide/workdir/src/mod_tests.rs:40:20
[INFO] [stdout]   23:     0x563a1d4d77f6 - core::ops::function::FnOnce::call_once::h3763ebff04d20adb
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x563a1d51342f - core::ops::function::FnOnce::call_once::h2b5d431d5046312d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x563a1d51342f - test::__rust_begin_short_backtrace::h7714669af176e207
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:628:18
[INFO] [stdout]   26:     0x563a1d512445 - test::run_test_in_process::{{closure}}::h85218797dcbcec12
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:60
[INFO] [stdout]   27:     0x563a1d512445 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h76c106ea31c14d7b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x563a1d512445 - std::panicking::try::do_call::h3bd5d0f6620ee946
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   29:     0x563a1d512445 - std::panicking::try::h232e535e4744fe31
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   30:     0x563a1d512445 - std::panic::catch_unwind::h3ce3bd6ca8dbac68
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   31:     0x563a1d512445 - test::run_test_in_process::hc97b257c9621286a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:27
[INFO] [stdout]   32:     0x563a1d512445 - test::run_test::{{closure}}::h2aa798823a438d38
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:574:43
[INFO] [stdout]   33:     0x563a1d4da706 - test::run_test::{{closure}}::h87d231c78fb59832
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:602:41
[INFO] [stdout]   34:     0x563a1d4da706 - std::sys_common::backtrace::__rust_begin_short_backtrace::he6df152596625789
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:154:18
[INFO] [stdout]   35:     0x563a1d4df7b7 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::ha94be15d1e0acf36
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   36:     0x563a1d4df7b7 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9dc6bd6372f16606
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x563a1d4df7b7 - std::panicking::try::do_call::h9057517f80303cd4
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   38:     0x563a1d4df7b7 - std::panicking::try::he3a30b11ee45340c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   39:     0x563a1d4df7b7 - std::panic::catch_unwind::h410458cfd3528b8b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   40:     0x563a1d4df7b7 - std::thread::Builder::spawn_unchecked_::{{closure}}::h72ac3bdb567b737b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   41:     0x563a1d4df7b7 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h38f34da3654a8344
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x563a1d542b95 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc7eafaff61e32df9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   43:     0x563a1d542b95 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6ba4a5de48dd2304
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   44:     0x563a1d542b95 - std::sys::unix::thread::Thread::new::thread_start::he469335aef763e45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   45:     0x7fcab4f7aac3 - <unknown>
[INFO] [stdout]   46:     0x7fcab500bbf4 - __clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] ---- mod_tests::panic stdout ----
[INFO] [stdout] thread 'mod_tests::panic' panicked at src/mod_tests.rs:48:5:
[INFO] [stdout] make this test fail
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x563a1d53c04c - std::backtrace_rs::backtrace::libunwind::trace::ha637c64ce894333a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
[INFO] [stdout]    1:     0x563a1d53c04c - std::backtrace_rs::backtrace::trace_unsynchronized::h47f62dea28e0c88d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x563a1d53c04c - std::sys_common::backtrace::_print_fmt::h9eef0abe20ede486
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:67:5
[INFO] [stdout]    3:     0x563a1d53c04c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hed7f999df88cc644
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x563a1d565b90 - core::fmt::rt::Argument::fmt::h1539a9308b8d058d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/rt.rs:142:9
[INFO] [stdout]    5:     0x563a1d565b90 - core::fmt::write::h3a39390d8560d9c9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:1120:17
[INFO] [stdout]    6:     0x563a1d5399ff - std::io::Write::write_fmt::h040b369f3a0f9cbc
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/io/mod.rs:1762:15
[INFO] [stdout]    7:     0x563a1d53be34 - std::sys_common::backtrace::_print::h894006fb5c6f3d45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x563a1d53be34 - std::sys_common::backtrace::print::h23a2d212c6fff936
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x563a1d53daf7 - std::panicking::default_hook::{{closure}}::h8a1d2ee00185001a
[INFO] [stdout]   10:     0x563a1d53d7e3 - std::panicking::default_hook::h6038f2eba384e475
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:289:9
[INFO] [stdout]   11:     0x563a1d50ddd7 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h0ad024c9bdc6d768
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   12:     0x563a1d50ddd7 - test::test_main::{{closure}}::h7500b54257359db6
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:138:21
[INFO] [stdout]   13:     0x563a1d53e108 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h1f8f335eaa9cfaee
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2021:9
[INFO] [stdout]   14:     0x563a1d53e108 - std::panicking::rust_panic_with_hook::h2b5517d590cab22e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:783:13
[INFO] [stdout]   15:     0x563a1d53de29 - std::panicking::begin_panic_handler::{{closure}}::h233112c06e0ef43e
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:649:13
[INFO] [stdout]   16:     0x563a1d53c516 - std::sys_common::backtrace::__rust_end_short_backtrace::h6e893f24d7ebbff8
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:170:18
[INFO] [stdout]   17:     0x563a1d53dbc2 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:645:5
[INFO] [stdout]   18:     0x563a1d4d2cf5 - core::panicking::panic_fmt::hbf0e066aabfa482c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x563a1d4da322 - RustPrograming_Cases::mod_tests::panic::h72f405c27fa4f00d
[INFO] [stdout]                                at /opt/rustwide/workdir/src/mod_tests.rs:48:5
[INFO] [stdout]   20:     0x563a1d4da2d7 - RustPrograming_Cases::mod_tests::panic::{{closure}}::hdbcd0402f0618ceb
[INFO] [stdout]                                at /opt/rustwide/workdir/src/mod_tests.rs:47:11
[INFO] [stdout]   21:     0x563a1d4d7986 - core::ops::function::FnOnce::call_once::he94564ee7213d3f4
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x563a1d51342f - core::ops::function::FnOnce::call_once::h2b5d431d5046312d
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x563a1d51342f - test::__rust_begin_short_backtrace::h7714669af176e207
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:628:18
[INFO] [stdout]   24:     0x563a1d512445 - test::run_test_in_process::{{closure}}::h85218797dcbcec12
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:60
[INFO] [stdout]   25:     0x563a1d512445 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h76c106ea31c14d7b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x563a1d512445 - std::panicking::try::do_call::h3bd5d0f6620ee946
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   27:     0x563a1d512445 - std::panicking::try::h232e535e4744fe31
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   28:     0x563a1d512445 - std::panic::catch_unwind::h3ce3bd6ca8dbac68
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   29:     0x563a1d512445 - test::run_test_in_process::hc97b257c9621286a
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:651:27
[INFO] [stdout]   30:     0x563a1d512445 - test::run_test::{{closure}}::h2aa798823a438d38
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:574:43
[INFO] [stdout]   31:     0x563a1d4da706 - test::run_test::{{closure}}::h87d231c78fb59832
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/test/src/lib.rs:602:41
[INFO] [stdout]   32:     0x563a1d4da706 - std::sys_common::backtrace::__rust_begin_short_backtrace::he6df152596625789
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys_common/backtrace.rs:154:18
[INFO] [stdout]   33:     0x563a1d4df7b7 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::ha94be15d1e0acf36
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:529:17
[INFO] [stdout]   34:     0x563a1d4df7b7 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9dc6bd6372f16606
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x563a1d4df7b7 - std::panicking::try::do_call::h9057517f80303cd4
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:552:40
[INFO] [stdout]   36:     0x563a1d4df7b7 - std::panicking::try::he3a30b11ee45340c
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panicking.rs:516:19
[INFO] [stdout]   37:     0x563a1d4df7b7 - std::panic::catch_unwind::h410458cfd3528b8b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/panic.rs:142:14
[INFO] [stdout]   38:     0x563a1d4df7b7 - std::thread::Builder::spawn_unchecked_::{{closure}}::h72ac3bdb567b737b
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/thread/mod.rs:528:30
[INFO] [stdout]   39:     0x563a1d4df7b7 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h38f34da3654a8344
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x563a1d542b95 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hc7eafaff61e32df9
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   41:     0x563a1d542b95 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6ba4a5de48dd2304
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/alloc/src/boxed.rs:2007:9
[INFO] [stdout]   42:     0x563a1d542b95 - std::sys::unix::thread::Thread::new::thread_start::he469335aef763e45
[INFO] [stdout]                                at /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/std/src/sys/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7fcab4f7aac3 - <unknown>
[INFO] [stdout]   44:     0x7fcab500bbf4 - __clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     mod_tests::it_doesnt_work
[INFO] [stdout]     mod_tests::panic
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 4 passed; 2 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin RustPrograming_Cases`
[INFO] running `Command { std: "docker" "inspect" "27bb71f31b919a847da53f49abc54a49e02321f46ba88e170c220fb2771895c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27bb71f31b919a847da53f49abc54a49e02321f46ba88e170c220fb2771895c1", kill_on_drop: false }`
[INFO] [stdout] 27bb71f31b919a847da53f49abc54a49e02321f46ba88e170c220fb2771895c1
