[INFO] cloning repository https://github.com/kyssion/rust_study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kyssion/rust_study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyssion%2Frust_study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyssion%2Frust_study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6e4b6e91df8ea78f23c654ab924069c9400d75f7
[INFO] testing kyssion/rust_study against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyssion%2Frust_study" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kyssion/rust_study on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kyssion/rust_study
[INFO] finished tweaking git repo https://github.com/kyssion/rust_study
[INFO] tweaked toml for git repo https://github.com/kyssion/rust_study written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/kyssion/rust_study already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a6d045b648c1aaec2d415030272ad593db6a125f3d6be7869dd33f2c883a3b3f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a6d045b648c1aaec2d415030272ad593db6a125f3d6be7869dd33f2c883a3b3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6d045b648c1aaec2d415030272ad593db6a125f3d6be7869dd33f2c883a3b3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6d045b648c1aaec2d415030272ad593db6a125f3d6be7869dd33f2c883a3b3f", kill_on_drop: false }`
[INFO] [stdout] a6d045b648c1aaec2d415030272ad593db6a125f3d6be7869dd33f2c883a3b3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 20081868fd3117ada1f62753ab21e57a74a571ec2c00c0d3eed58cf77d28e51f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "20081868fd3117ada1f62753ab21e57a74a571ec2c00c0d3eed58cf77d28e51f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rust_study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/rust04_panic.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/rust00_base.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let a :i32  = 12;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/rust00_base.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut b : i32 = 123;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/rust00_base.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let b = ""; //  合法的相当于变量名称重用
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/rust00_base.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let b = e.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust00_base.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let c = e.1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/rust00_base.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let d = e.2;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust00_base.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut c = item[0]; // 这里时直接赋值了
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/rust00_base.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |    let a=  if true{1} else  if false {2} else {3};
[INFO] [stdout]    |        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]  --> src/rust01_ownership.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut p = strItem;//所有权转移到p 上面了
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust01_ownership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let p = &a[0];//这里指定了一个引用
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust01_ownership.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let p = &mut a[0];//这里指定了一个可变引用
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust01_ownership.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let p = &str[..1];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let user = User{
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut user = User{
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let p = item.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let c = (1,3,2);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let c = User{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let item = Message::Move {x:123,y:334};
[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/rust02_struct_enum.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn ans(item:Message){
[INFO] [stdout]    |        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let p = match c {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:137:9
[INFO] [stdout]     |
[INFO] [stdout] 137 |     let p = if let Coin::Five {x}=c{
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vecItem`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stdout]   |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_vecItem`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a= vecItem.get(0);
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let a = vecItem[0]; //1. vec 可以通过 get 或者数组下标的方法获取 。 两种区别是， 下标引用了不是别的或出现panic get会返回None                                  ...
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for i in &vecItem{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     for i in &mut vecItem{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     for i in vecItem{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:62:10
[INFO] [stdout]    |
[INFO] [stdout] 62 |     for (key,value) in &scores{
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:62:14
[INFO] [stdout]    |
[INFO] [stdout] 62 |     for (key,value) in &scores{
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]   --> src/rust04_panic.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let file = match file {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let f = File::open("hello.txt").unwrap();//这个将会直接吧错误抛出panic
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");//这个会在panic前面加上一个自己的提示文案
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust04_panic.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let p= match f.read_to_string(&mut s) {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/rust04_panic.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let s=f.read_to_string(&mut s)?;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let f = File::open("hello.txt")?.read_to_string(&mut s)?;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let a = Point{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let b= Point{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let a = Test::One(String::from("ffff"));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:144:32
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn test7<T: TestTrait+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/rust05_trait_lifetione_types.rs:147:15
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn test6<T,Z>(item :&T) where T:TestTrait+Summary,Z:TestTrait+Debug{}
[INFO] [stdout]     |               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:227:13
[INFO] [stdout]     |
[INFO] [stdout] 227 |             r = &x;             //  |       |
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:276:21
[INFO] [stdout]     |
[INFO] [stdout] 276 |     fn init2(&self, i: &str) -> & str {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust00_base.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut b : i32 = 123;
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust00_base.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut c = item[0]; // 这里时直接赋值了
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust01_ownership.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut strItem = String::from("ffff");
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust01_ownership.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut p = strItem;//所有权转移到p 上面了
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust02_struct_enum.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut user = User{
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust02_struct_enum.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mut item = Item(32,32,32);
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let mut scores: HashMap<_, _> =
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/rust00_base.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test2`
[INFO] [stdout]   --> src/rust00_base.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn test2(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test3`
[INFO] [stdout]   --> src/rust00_base.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn test3() -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test4`
[INFO] [stdout]   --> src/rust00_base.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn test4(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/rust01_ownership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn test(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/rust02_struct_enum.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct  User{
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Item`
[INFO] [stdout]  --> src/rust02_struct_enum.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Item(i32,i32,i32);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/rust02_struct_enum.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn test(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show_name`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn show_name(&self){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn init()->User{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IpAddr`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:63:6
[INFO] [stdout]    |
[INFO] [stdout] 63 | enum IpAddr{
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Message`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 | enum Message{
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_enum`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn test_enum(){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ans`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn ans(item:Message){
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:86:10
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub enum Coin{
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Use`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     Use,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NoUser`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     NoUser
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_support`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn match_support(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test3`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn test3(c : Coin)-> i32{
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `plus_one`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `if_let`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn if_let(c : Coin){
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vec_test`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn vec_test(){
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `string_test`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn string_test(){
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `string_f`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn string_f(strItem : &str) ->&str{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `map_f`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn map_f(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_panic`
[INFO] [stdout]  --> src/rust04_panic.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn test_panic(){
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_result`
[INFO] [stdout]   --> src/rust04_panic.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn test_result()->Result<String, io::Error>{
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/rust04_panic.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest`
[INFO] [stdout]  --> src/rust05_trait_lifetione_types.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn largest<T: PartialOrd+Copy>(list: &[T]) -> T {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn show(&self)->&T{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show_i32`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn show_i32(&self)->i32{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `struct_type`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn struct_type(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Test`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:45:6
[INFO] [stdout]    |
[INFO] [stdout] 45 | enum Test<T>{
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enum_type`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn enum_type(){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn test(){
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test3`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn test3(summary: &impl Summary){
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test4`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 | pub fn test4<T: Summary>(item :&T){
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test7`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn test7<T: TestTrait+Summary>(item:&T){}
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test6`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn test6<T,Z>(item :&T) where T:TestTrait+Summary,Z:TestTrait+Debug{}
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_summarizable`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:150:4
[INFO] [stdout]     |
[INFO] [stdout] 150 | fn returns_summarizable(switch: bool) -> impl Summary {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 | struct Pair<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:194:8
[INFO] [stdout]     |
[INFO] [stdout] 194 |     fn new(x: T, y: T) -> Pair<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test1`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:220:4
[INFO] [stdout]     |
[INFO] [stdout] 220 | fn test1(){
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:240:4
[INFO] [stdout]     |
[INFO] [stdout] 240 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test2`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:248:4
[INFO] [stdout]     |
[INFO] [stdout] 248 | fn test2(){
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ItemInfo`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:265:8
[INFO] [stdout]     |
[INFO] [stdout] 265 | struct ItemInfo<'a,'c>{
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:272:8
[INFO] [stdout]     |
[INFO] [stdout] 272 |     fn init<'b>(&self, i: &'b str) -> &'b str {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init2`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:276:8
[INFO] [stdout]     |
[INFO] [stdout] 276 |     fn init2(&self, i: &str) -> & str {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_with_an_announcement`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:282:4
[INFO] [stdout]     |
[INFO] [stdout] 282 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str where T: Display, {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `p` should have an upper case name
[INFO] [stdout]  --> src/rust00_base.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |     const p : i32 = 123;
[INFO] [stdout]   |           ^ help: convert the identifier to upper case: `P`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `strItem` should have a snake case name
[INFO] [stdout]  --> src/rust01_ownership.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut strItem = String::from("ffff");
[INFO] [stdout]   |             ^^^^^^^ help: convert the identifier to snake case: `str_item`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `vecItem` should have a snake case name
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stdout]   |             ^^^^^^^ help: convert the identifier to snake case: `vec_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `vecItem` should have a snake case name
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut vecItem = vec![1,2,3,4,5];
[INFO] [stdout]   |             ^^^^^^^ help: convert the identifier to snake case: `vec_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `strItem` should have a snake case name
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn string_f(strItem : &str) ->&str{
[INFO] [stdout]    |                 ^^^^^^^ help: convert the identifier to snake case: `str_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `myMap` should have a snake case name
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut myMap = HashMap::new();
[INFO] [stdout]    |             ^^^^^ help: convert the identifier to snake case: `my_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 109 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.82s
[INFO] running `Command { std: "docker" "inspect" "20081868fd3117ada1f62753ab21e57a74a571ec2c00c0d3eed58cf77d28e51f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20081868fd3117ada1f62753ab21e57a74a571ec2c00c0d3eed58cf77d28e51f", kill_on_drop: false }`
[INFO] [stdout] 20081868fd3117ada1f62753ab21e57a74a571ec2c00c0d3eed58cf77d28e51f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cc2e27bcc42f5a2cd43a4da26360842a54b0d6949037b9858096087166ecb98
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6cc2e27bcc42f5a2cd43a4da26360842a54b0d6949037b9858096087166ecb98", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/rust04_panic.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/rust00_base.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let a :i32  = 12;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/rust00_base.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut b : i32 = 123;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/rust00_base.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let b = ""; //  合法的相当于变量名称重用
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/rust00_base.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let b = e.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust00_base.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let c = e.1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/rust00_base.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let d = e.2;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust00_base.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut c = item[0]; // 这里时直接赋值了
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/rust00_base.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |    let a=  if true{1} else  if false {2} else {3};
[INFO] [stdout]    |        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]  --> src/rust01_ownership.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut p = strItem;//所有权转移到p 上面了
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust01_ownership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let p = &a[0];//这里指定了一个引用
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust01_ownership.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let p = &mut a[0];//这里指定了一个可变引用
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust01_ownership.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let p = &str[..1];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let user = User{
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut user = User{
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let p = item.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let c = (1,3,2);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let c = User{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:80:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let item = Message::Move {x:123,y:334};
[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/rust02_struct_enum.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn ans(item:Message){
[INFO] [stdout]    |        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let p = match c {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:137:9
[INFO] [stdout]     |
[INFO] [stdout] 137 |     let p = if let Coin::Five {x}=c{
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vecItem`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stdout]   |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_vecItem`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a= vecItem.get(0);
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let a = vecItem[0]; //1. vec 可以通过 get 或者数组下标的方法获取 。 两种区别是， 下标引用了不是别的或出现panic get会返回None                                  ...
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for i in &vecItem{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     for i in &mut vecItem{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     for i in vecItem{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:62:10
[INFO] [stdout]    |
[INFO] [stdout] 62 |     for (key,value) in &scores{
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:62:14
[INFO] [stdout]    |
[INFO] [stdout] 62 |     for (key,value) in &scores{
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]   --> src/rust04_panic.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let file = match file {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let f = File::open("hello.txt").unwrap();//这个将会直接吧错误抛出panic
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");//这个会在panic前面加上一个自己的提示文案
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/rust04_panic.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let p= match f.read_to_string(&mut s) {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/rust04_panic.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let s=f.read_to_string(&mut s)?;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/rust04_panic.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let f = File::open("hello.txt")?.read_to_string(&mut s)?;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let a = Point{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let b= Point{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let a = Test::One(String::from("ffff"));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `item`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:144:32
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn test7<T: TestTrait+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/rust05_trait_lifetione_types.rs:147:15
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn test6<T,Z>(item :&T) where T:TestTrait+Summary,Z:TestTrait+Debug{}
[INFO] [stdout]     |               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `r` is never read
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:227:13
[INFO] [stdout]     |
[INFO] [stdout] 227 |             r = &x;             //  |       |
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:276:21
[INFO] [stdout]     |
[INFO] [stdout] 276 |     fn init2(&self, i: &str) -> & str {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust00_base.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut b : i32 = 123;
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust00_base.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut c = item[0]; // 这里时直接赋值了
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust01_ownership.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut strItem = String::from("ffff");
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust01_ownership.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut p = strItem;//所有权转移到p 上面了
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust02_struct_enum.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut user = User{
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust02_struct_enum.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mut item = Item(32,32,32);
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let mut scores: HashMap<_, _> =
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/rust00_base.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test2`
[INFO] [stdout]   --> src/rust00_base.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn test2(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test3`
[INFO] [stdout]   --> src/rust00_base.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn test3() -> i32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test4`
[INFO] [stdout]   --> src/rust00_base.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub fn test4(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/rust01_ownership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn test(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/rust02_struct_enum.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct  User{
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Item`
[INFO] [stdout]  --> src/rust02_struct_enum.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Item(i32,i32,i32);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]  --> src/rust02_struct_enum.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn test(){
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show_name`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn show_name(&self){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 |     fn init()->User{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `IpAddr`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:63:6
[INFO] [stdout]    |
[INFO] [stdout] 63 | enum IpAddr{
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Message`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:68:6
[INFO] [stdout]    |
[INFO] [stdout] 68 | enum Message{
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_enum`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub fn test_enum(){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ans`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn ans(item:Message){
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:86:10
[INFO] [stdout]    |
[INFO] [stdout] 86 | pub enum Coin{
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Use`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     Use,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NoUser`
[INFO] [stdout]   --> src/rust02_struct_enum.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 98 |     NoUser
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `match_support`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn match_support(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test3`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn test3(c : Coin)-> i32{
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `plus_one`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `if_let`
[INFO] [stdout]    --> src/rust02_struct_enum.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn if_let(c : Coin){
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vec_test`
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn vec_test(){
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `string_test`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub fn string_test(){
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `string_f`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn string_f(strItem : &str) ->&str{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `map_f`
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn map_f(){
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_panic`
[INFO] [stdout]  --> src/rust04_panic.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn test_panic(){
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_result`
[INFO] [stdout]   --> src/rust04_panic.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub fn test_result()->Result<String, io::Error>{
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> src/rust04_panic.rs:67:4
[INFO] [stdout]    |
[INFO] [stdout] 67 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `largest`
[INFO] [stdout]  --> src/rust05_trait_lifetione_types.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn largest<T: PartialOrd+Copy>(list: &[T]) -> T {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn show(&self)->&T{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show_i32`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn show_i32(&self)->i32{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `struct_type`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn struct_type(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Test`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:45:6
[INFO] [stdout]    |
[INFO] [stdout] 45 | enum Test<T>{
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enum_type`
[INFO] [stdout]   --> src/rust05_trait_lifetione_types.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn enum_type(){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub fn test(){
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test3`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn test3(summary: &impl Summary){
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test4`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 | pub fn test4<T: Summary>(item :&T){
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test7`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn test7<T: TestTrait+Summary>(item:&T){}
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test6`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn test6<T,Z>(item :&T) where T:TestTrait+Summary,Z:TestTrait+Debug{}
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_summarizable`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:150:4
[INFO] [stdout]     |
[INFO] [stdout] 150 | fn returns_summarizable(switch: bool) -> impl Summary {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Pair`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:188:8
[INFO] [stdout]     |
[INFO] [stdout] 188 | struct Pair<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:194:8
[INFO] [stdout]     |
[INFO] [stdout] 194 |     fn new(x: T, y: T) -> Pair<T> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cmp_display`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 |     fn cmp_display(&self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test1`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:220:4
[INFO] [stdout]     |
[INFO] [stdout] 220 | fn test1(){
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:240:4
[INFO] [stdout]     |
[INFO] [stdout] 240 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test2`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:248:4
[INFO] [stdout]     |
[INFO] [stdout] 248 | fn test2(){
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ItemInfo`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:265:8
[INFO] [stdout]     |
[INFO] [stdout] 265 | struct ItemInfo<'a,'c>{
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:272:8
[INFO] [stdout]     |
[INFO] [stdout] 272 |     fn init<'b>(&self, i: &'b str) -> &'b str {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init2`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:276:8
[INFO] [stdout]     |
[INFO] [stdout] 276 |     fn init2(&self, i: &str) -> & str {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_with_an_announcement`
[INFO] [stdout]    --> src/rust05_trait_lifetione_types.rs:282:4
[INFO] [stdout]     |
[INFO] [stdout] 282 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str where T: Display, {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `p` should have an upper case name
[INFO] [stdout]  --> src/rust00_base.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |     const p : i32 = 123;
[INFO] [stdout]   |           ^ help: convert the identifier to upper case: `P`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `strItem` should have a snake case name
[INFO] [stdout]  --> src/rust01_ownership.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut strItem = String::from("ffff");
[INFO] [stdout]   |             ^^^^^^^ help: convert the identifier to snake case: `str_item`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `vecItem` should have a snake case name
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stdout]   |             ^^^^^^^ help: convert the identifier to snake case: `vec_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `vecItem` should have a snake case name
[INFO] [stdout]  --> src/rust03_collection_string_map.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut vecItem = vec![1,2,3,4,5];
[INFO] [stdout]   |             ^^^^^^^ help: convert the identifier to snake case: `vec_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `strItem` should have a snake case name
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn string_f(strItem : &str) ->&str{
[INFO] [stdout]    |                 ^^^^^^^ help: convert the identifier to snake case: `str_item`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `myMap` should have a snake case name
[INFO] [stdout]   --> src/rust03_collection_string_map.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut myMap = HashMap::new();
[INFO] [stdout]    |             ^^^^^ help: convert the identifier to snake case: `my_map`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 109 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "6cc2e27bcc42f5a2cd43a4da26360842a54b0d6949037b9858096087166ecb98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cc2e27bcc42f5a2cd43a4da26360842a54b0d6949037b9858096087166ecb98", kill_on_drop: false }`
[INFO] [stdout] 6cc2e27bcc42f5a2cd43a4da26360842a54b0d6949037b9858096087166ecb98
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0dde005992c5a75ab9f93a64e363e39637ab2fe3c02d4b5eb70b623ee3787787
[INFO] running `Command { std: "docker" "start" "-a" "0dde005992c5a75ab9f93a64e363e39637ab2fe3c02d4b5eb70b623ee3787787", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/rust04_panic.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/rust00_base.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let a :i32  = 12;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]  --> src/rust00_base.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut b : i32 = 123;
[INFO] [stderr]   |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]  --> src/rust00_base.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let b = ""; //  合法的相当于变量名称重用
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/rust00_base.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let b = e.0;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/rust00_base.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let c = e.1;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/rust00_base.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let d = e.2;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/rust00_base.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut c = item[0]; // 这里时直接赋值了
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/rust00_base.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |    let a=  if true{1} else  if false {2} else {3};
[INFO] [stderr]    |        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]  --> src/rust01_ownership.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut p = strItem;//所有权转移到p 上面了
[INFO] [stderr]   |             ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/rust01_ownership.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let p = &a[0];//这里指定了一个引用
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/rust01_ownership.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let p = &mut a[0];//这里指定了一个可变引用
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/rust01_ownership.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let p = &str[..1];
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let user = User{
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut user = User{
[INFO] [stderr]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let p = item.0;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let c = (1,3,2);
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let c = User{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:80:9
[INFO] [stderr]    |
[INFO] [stderr] 80 |     let item = Message::Move {x:123,y:334};
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:83:8
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn ans(item:Message){
[INFO] [stderr]    |        ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]    --> src/rust02_struct_enum.rs:131:9
[INFO] [stderr]     |
[INFO] [stderr] 131 |     let p = match c {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]    --> src/rust02_struct_enum.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |     let p = if let Coin::Five {x}=c{
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vecItem`
[INFO] [stderr]  --> src/rust03_collection_string_map.rs:4:13
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stderr]   |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_vecItem`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/rust03_collection_string_map.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let a= vecItem.get(0);
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/rust03_collection_string_map.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let a = vecItem[0]; //1. vec 可以通过 get 或者数组下标的方法获取 。 两种区别是， 下标引用了不是别的或出现panic get会返回None                                  ...
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     for i in &vecItem{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     for i in &mut vecItem{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     for i in vecItem{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:62:10
[INFO] [stderr]    |
[INFO] [stderr] 62 |     for (key,value) in &scores{
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:62:14
[INFO] [stderr]    |
[INFO] [stderr] 62 |     for (key,value) in &scores{
[INFO] [stderr]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `file`
[INFO] [stderr]   --> src/rust04_panic.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let file = match file {
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/rust04_panic.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/rust04_panic.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let f = File::open("hello.txt").unwrap();//这个将会直接吧错误抛出panic
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/rust04_panic.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let f = File::open("hello.txt").expect("Failed to open hello.txt");//这个会在panic前面加上一个自己的提示文案
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/rust04_panic.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let p= match f.read_to_string(&mut s) {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/rust04_panic.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |     let s=f.read_to_string(&mut s)?;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/rust04_panic.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let f = File::open("hello.txt")?.read_to_string(&mut s)?;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let a = Point{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let b= Point{
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let a = Test::One(String::from("ffff"));
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `item`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:144:32
[INFO] [stderr]     |
[INFO] [stderr] 144 | fn test7<T: TestTrait+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/rust05_trait_lifetione_types.rs:147:15
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn test6<T,Z>(item :&T) where T:TestTrait+Summary,Z:TestTrait+Debug{}
[INFO] [stderr]     |               ^^^^ help: if this is intentional, prefix it with an underscore: `_item`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `r` is never read
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:227:13
[INFO] [stderr]     |
[INFO] [stderr] 227 |             r = &x;             //  |       |
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:276:21
[INFO] [stderr]     |
[INFO] [stderr] 276 |     fn init2(&self, i: &str) -> & str {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/rust00_base.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut b : i32 = 123;
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rust00_base.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut c = item[0]; // 这里时直接赋值了
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/rust01_ownership.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut strItem = String::from("ffff");
[INFO] [stderr]   |         ----^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/rust01_ownership.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut p = strItem;//所有权转移到p 上面了
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rust02_struct_enum.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut user = User{
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rust02_struct_enum.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let mut item = Item(32,32,32);
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/rust03_collection_string_map.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stderr]   |         ----^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let mut scores: HashMap<_, _> =
[INFO] [stderr]    |         ----^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stderr]  --> src/rust00_base.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn test(){
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test2`
[INFO] [stderr]   --> src/rust00_base.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn test2(){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test3`
[INFO] [stderr]   --> src/rust00_base.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn test3() -> i32 {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test4`
[INFO] [stderr]   --> src/rust00_base.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn test4(){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stderr]  --> src/rust01_ownership.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub fn test(){
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `User`
[INFO] [stderr]  --> src/rust02_struct_enum.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct  User{
[INFO] [stderr]   |         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Item`
[INFO] [stderr]  --> src/rust02_struct_enum.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Item(i32,i32,i32);
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stderr]  --> src/rust02_struct_enum.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn test(){
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `show_name`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 |     fn show_name(&self){
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `init`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn init()->User{
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `IpAddr`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:63:6
[INFO] [stderr]    |
[INFO] [stderr] 63 | enum IpAddr{
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Message`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:68:6
[INFO] [stderr]    |
[INFO] [stderr] 68 | enum Message{
[INFO] [stderr]    |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_enum`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub fn test_enum(){
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `ans`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:83:4
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn ans(item:Message){
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Coin`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:86:10
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub enum Coin{
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Use`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:97:5
[INFO] [stderr]    |
[INFO] [stderr] 97 |     Use,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `NoUser`
[INFO] [stderr]   --> src/rust02_struct_enum.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     NoUser
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `match_support`
[INFO] [stderr]    --> src/rust02_struct_enum.rs:101:4
[INFO] [stderr]     |
[INFO] [stderr] 101 | fn match_support(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test3`
[INFO] [stderr]    --> src/rust02_struct_enum.rs:105:8
[INFO] [stderr]     |
[INFO] [stderr] 105 | pub fn test3(c : Coin)-> i32{
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `plus_one`
[INFO] [stderr]    --> src/rust02_struct_enum.rs:121:4
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `if_let`
[INFO] [stderr]    --> src/rust02_struct_enum.rs:129:4
[INFO] [stderr]     |
[INFO] [stderr] 129 | fn if_let(c : Coin){
[INFO] [stderr]     |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `vec_test`
[INFO] [stderr]  --> src/rust03_collection_string_map.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn vec_test(){
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string_test`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | pub fn string_test(){
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string_f`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn string_f(strItem : &str) ->&str{
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `map_f`
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn map_f(){
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_panic`
[INFO] [stderr]  --> src/rust04_panic.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn test_panic(){
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_result`
[INFO] [stderr]   --> src/rust04_panic.rs:40:8
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn test_result()->Result<String, io::Error>{
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `read_username_from_file`
[INFO] [stderr]   --> src/rust04_panic.rs:67:4
[INFO] [stderr]    |
[INFO] [stderr] 67 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `largest`
[INFO] [stderr]  --> src/rust05_trait_lifetione_types.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn largest<T: PartialOrd+Copy>(list: &[T]) -> T {
[INFO] [stderr]   |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct Point<T> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `show`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn show(&self)->&T{
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `show_i32`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn show_i32(&self)->i32{
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `struct_type`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:35:4
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn struct_type(){
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Test`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:45:6
[INFO] [stderr]    |
[INFO] [stderr] 45 | enum Test<T>{
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `enum_type`
[INFO] [stderr]   --> src/rust05_trait_lifetione_types.rs:50:4
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn enum_type(){
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:113:8
[INFO] [stderr]     |
[INFO] [stderr] 113 | pub fn test(){
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test3`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:127:8
[INFO] [stderr]     |
[INFO] [stderr] 127 | pub fn test3(summary: &impl Summary){
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test4`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:134:8
[INFO] [stderr]     |
[INFO] [stderr] 134 | pub fn test4<T: Summary>(item :&T){
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test7`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:144:4
[INFO] [stderr]     |
[INFO] [stderr] 144 | fn test7<T: TestTrait+Summary>(item:&T){}
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test6`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:147:4
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn test6<T,Z>(item :&T) where T:TestTrait+Summary,Z:TestTrait+Debug{}
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `returns_summarizable`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:150:4
[INFO] [stderr]     |
[INFO] [stderr] 150 | fn returns_summarizable(switch: bool) -> impl Summary {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Pair`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:188:8
[INFO] [stderr]     |
[INFO] [stderr] 188 | struct Pair<T> {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:194:8
[INFO] [stderr]     |
[INFO] [stderr] 194 |     fn new(x: T, y: T) -> Pair<T> {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `cmp_display`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:200:8
[INFO] [stderr]     |
[INFO] [stderr] 200 |     fn cmp_display(&self) {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test1`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:220:4
[INFO] [stderr]     |
[INFO] [stderr] 220 | fn test1(){
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:240:4
[INFO] [stderr]     |
[INFO] [stderr] 240 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test2`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:248:4
[INFO] [stderr]     |
[INFO] [stderr] 248 | fn test2(){
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `ItemInfo`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:265:8
[INFO] [stderr]     |
[INFO] [stderr] 265 | struct ItemInfo<'a,'c>{
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `init`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:272:8
[INFO] [stderr]     |
[INFO] [stderr] 272 |     fn init<'b>(&self, i: &'b str) -> &'b str {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `init2`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:276:8
[INFO] [stderr]     |
[INFO] [stderr] 276 |     fn init2(&self, i: &str) -> & str {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `longest_with_an_announcement`
[INFO] [stderr]    --> src/rust05_trait_lifetione_types.rs:282:4
[INFO] [stderr]     |
[INFO] [stderr] 282 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str where T: Display, {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `p` should have an upper case name
[INFO] [stderr]  --> src/rust00_base.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 |     const p : i32 = 123;
[INFO] [stderr]   |           ^ help: convert the identifier to upper case: `P`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `strItem` should have a snake case name
[INFO] [stderr]  --> src/rust01_ownership.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut strItem = String::from("ffff");
[INFO] [stderr]   |             ^^^^^^^ help: convert the identifier to snake case: `str_item`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `vecItem` should have a snake case name
[INFO] [stderr]  --> src/rust03_collection_string_map.rs:4:13
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let mut vecItem:Vec<i32> = Vec::new();
[INFO] [stderr]   |             ^^^^^^^ help: convert the identifier to snake case: `vec_item`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `vecItem` should have a snake case name
[INFO] [stderr]  --> src/rust03_collection_string_map.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let mut vecItem = vec![1,2,3,4,5];
[INFO] [stderr]   |             ^^^^^^^ help: convert the identifier to snake case: `vec_item`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `strItem` should have a snake case name
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn string_f(strItem : &str) ->&str{
[INFO] [stderr]    |                 ^^^^^^^ help: convert the identifier to snake case: `str_item`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `myMap` should have a snake case name
[INFO] [stderr]   --> src/rust03_collection_string_map.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let mut myMap = HashMap::new();
[INFO] [stderr]    |             ^^^^^ help: convert the identifier to snake case: `my_map`
[INFO] [stderr] 
[INFO] [stderr] warning: 109 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_study-e5fc479100530018)
[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] running `Command { std: "docker" "inspect" "0dde005992c5a75ab9f93a64e363e39637ab2fe3c02d4b5eb70b623ee3787787", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dde005992c5a75ab9f93a64e363e39637ab2fe3c02d4b5eb70b623ee3787787", kill_on_drop: false }`
[INFO] [stdout] 0dde005992c5a75ab9f93a64e363e39637ab2fe3c02d4b5eb70b623ee3787787