[INFO] cloning repository https://github.com/yaoting10/rust_course_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yaoting10/rust_course_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaoting10%2Frust_course_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaoting10%2Frust_course_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28de4166a0229fdcc1b4c77349575de9836ddd2e
[INFO] checking yaoting10/rust_course_demo against try#bf5ff6675cf10ce009ac02007b064a7cfc4509ac for pr-140558
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyaoting10%2Frust_course_demo" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yaoting10/rust_course_demo on toolchain bf5ff6675cf10ce009ac02007b064a7cfc4509ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bf5ff6675cf10ce009ac02007b064a7cfc4509ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yaoting10/rust_course_demo
[INFO] finished tweaking git repo https://github.com/yaoting10/rust_course_demo
[INFO] tweaked toml for git repo https://github.com/yaoting10/rust_course_demo written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/yaoting10/rust_course_demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bf5ff6675cf10ce009ac02007b064a7cfc4509ac" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+bf5ff6675cf10ce009ac02007b064a7cfc4509ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ad3797c001b901e7eda11921366afdbeb93466324814655c313445f7600cdc6
[INFO] running `Command { std: "docker" "start" "-a" "8ad3797c001b901e7eda11921366afdbeb93466324814655c313445f7600cdc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ad3797c001b901e7eda11921366afdbeb93466324814655c313445f7600cdc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ad3797c001b901e7eda11921366afdbeb93466324814655c313445f7600cdc6", kill_on_drop: false }`
[INFO] [stdout] 8ad3797c001b901e7eda11921366afdbeb93466324814655c313445f7600cdc6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+bf5ff6675cf10ce009ac02007b064a7cfc4509ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 27646f9b31ae68829e5278b20d1ec14683a2f17206c573d597e94bd9473283aa
[INFO] running `Command { std: "docker" "start" "-a" "27646f9b31ae68829e5278b20d1ec14683a2f17206c573d597e94bd9473283aa", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_course_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/array_map/map_demo1.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/array_map/map_dermo2.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `trait_object_demo2::Draw` is more private than the item `Screen`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:41:1
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Screen<T: Draw> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ struct `Screen` is reachable at visibility `pub(generics_trait)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `trait_object_demo2::Draw` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | trait Draw {
[INFO] [stdout]    | ^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `trait_object_demo2::Draw` is more private than the item `Screen<T>`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:45:1
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<T> Screen<T> where T: Draw {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation `Screen<T>` is reachable at visibility `pub(generics_trait)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `trait_object_demo2::Draw` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | trait Draw {
[INFO] [stdout]    | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `possession_demo1` is never used
[INFO] [stdout]  --> src/possession/possession_demo.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn possession_demo1(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `possession_demo2` is never used
[INFO] [stdout]   --> src/possession/possession_demo.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn possession_demo2(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_ownership` is never used
[INFO] [stdout]   --> src/possession/possession_demo.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn takes_ownership(some_string: String) { // some_string 进入作用域
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `makes_copy` is never used
[INFO] [stdout]   --> src/possession/possession_demo.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn makes_copy(some_integer: i32) { // some_integer 进入作用域
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `possession_demo3` is never used
[INFO] [stdout]   --> src/possession/possession_demo.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn possession_demo3(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `gives_ownership` is never used
[INFO] [stdout]   --> src/possession/possession_demo.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn gives_ownership() -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_and_gives_back` is never used
[INFO] [stdout]   --> src/possession/possession_demo.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn takes_and_gives_back(a_string: String) -> String { // a_string 进入作用域
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow` is never used
[INFO] [stdout]  --> src/possession/reference_borrow.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn borrow() {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reference_demo` is never used
[INFO] [stdout]   --> src/possession/reference_borrow.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn reference_demo(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_length` is never used
[INFO] [stdout]   --> src/possession/reference_borrow.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn calculate_length(s: &String) -> usize { // s 是一个指向 String 的引用
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet` is never used
[INFO] [stdout]  --> src/composite_type/strings.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn greet(name: String) {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_demo1` is never used
[INFO] [stdout]  --> src/composite_type/enmu_type.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn option_demo1(){
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_demo2` is never used
[INFO] [stdout]   --> src/composite_type/enmu_type.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn option_demo2(){
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/composite_type/enmu_type.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scenarios_demo1` is never used
[INFO] [stdout]  --> src/matching_pattern/applicable_scenarios.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn scenarios_demo1() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_coordinates` is never used
[INFO] [stdout]   --> src/matching_pattern/applicable_scenarios.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn print_coordinates(&(x, y): &(i32, i32)) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scenarios_demo2` is never used
[INFO] [stdout]   --> src/matching_pattern/applicable_scenarios.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn scenarios_demo2() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scenarios_demo3` is never used
[INFO] [stdout]   --> src/matching_pattern/applicable_scenarios.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn scenarios_demo3(){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]  --> src/method/method_demo1.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Circle{
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `area` are never used
[INFO] [stdout]   --> src/method/method_demo1.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Circle{
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 9  |     fn new(x: f64, y: f64, radius: f64) -> Circle {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     fn area(&self) -> f64{
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/method/method_demo2.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area` and `new` are never used
[INFO] [stdout]   --> src/method/method_demo2.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Rectangle{
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 9  |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn new(w: u32 , h: u32) -> Rectangle{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]   --> src/method/method_demo2.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Rectangle{
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 20 |     fn can_hold(&self, other: &Rectangle) -> bool{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]  --> src/method/method_demo3.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Message {
[INFO] [stdout]   |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/method/method_demo3.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Message {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 11 |     fn call(&self){
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]  --> src/generics_trait/generics_demo1.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn largest<T: PartialOrd + Copy>(list: &[T]) -> T {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest_1` is never used
[INFO] [stdout]   --> src/generics_trait/generics_demo1.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn largest_1<T:PartialOrd + Clone> (list: &[T]) -> T{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest_2` is never used
[INFO] [stdout]   --> src/generics_trait/generics_demo1.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn largest_2<T: PartialOrd>(list: &[T])-> &T{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]   --> src/generics_trait/generics_demo1.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn add<T: std::ops::Add<Output=T>>(a: T, b: T) -> T {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generics_trait/generics_demo2.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Point<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `summarize` is never used
[INFO] [stdout]  --> src/generics_trait/trait_demo1.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Summary {
[INFO] [stdout]   |           ------- method in this trait
[INFO] [stdout] 4 |     fn summarize(&self) ->String;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/generics_trait/trait_demo1.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Post{
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_into_demo1` is never used
[INFO] [stdout]  --> src/generics_trait/trait_demo2.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn try_into_demo1(){
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]   --> src/generics_trait/trait_demo2.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn add<T: Add<T, Output=T>>(a :T, b : T)-> T{
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `draw` is never used
[INFO] [stdout]  --> src/generics_trait/trait_object_demo1.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Draw{
[INFO] [stdout]   |           ---- method in this trait
[INFO] [stdout] 4 |     fn draw(&self);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `label` are never read
[INFO] [stdout]  --> src/generics_trait/trait_object_demo1.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Button{
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 7 |     pub width: u32,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 8 |     pub height: u32,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] 9 |     pub label: String,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `options` are never read
[INFO] [stdout]   --> src/generics_trait/trait_object_demo1.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct SelectBox{
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 19 |     pub width: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 20 |     pub height: u32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 21 |     pub options: Vec<String>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Draw` is never used
[INFO] [stdout]  --> src/generics_trait/trait_object_demo2.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Draw {
[INFO] [stdout]   |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw1` is never used
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn draw1(x: Box<dyn Draw>) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `draw2` is never used
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn draw2(x: &dyn Draw) {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Screen` is never constructed
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Screen<T: Draw> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<T> Screen<T> where T: Draw {
[INFO] [stdout]    | ------------------------------- method in this implementation
[INFO] [stdout] 46 |     pub fn run(&self) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]  --> src/generics_trait/trait_more_demo1.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Animal {
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]  --> src/generics_trait/trait_more_demo1.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Dog;
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `baby_name` is never used
[INFO] [stdout]  --> src/generics_trait/trait_more_demo1.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Dog{
[INFO] [stdout]   | -------- associated function in this implementation
[INFO] [stdout] 8 |     fn baby_name()-> String{
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `IpAddr` is never used
[INFO] [stdout]  --> src/array_map/array_demo2.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum IpAddr{
[INFO] [stdout]   |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `show_addr` is never used
[INFO] [stdout]  --> src/array_map/array_demo2.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn show_addr(ip: IpAddr){
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IpAddr` is never used
[INFO] [stdout]  --> src/array_map/array_demo3.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait IpAddr {
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `V4` is never constructed
[INFO] [stdout]  --> src/array_map/array_demo3.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct V4(String);
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `V6` is never constructed
[INFO] [stdout]   --> src/array_map/array_demo3.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct V6(String);
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/array_map/array_demo5.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Person{
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/array_map/array_demo5.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Person{
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 9 |     fn new(name: String, age: i32) -> Person{
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/life_cycle/lifecycle_demo1.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn longest<'a>(x: &'a str, y: &'a str)-> &'a str{
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed
[INFO] [stdout]  --> src/life_cycle/lifecycle_demo2.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct ImportantExcerpt<'a> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]  --> src/life_cycle/lifecycle_demo3.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn first_word(s: &str) -> &str {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `trait_object_demo2::Draw` is more private than the item `Screen`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:41:1
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Screen<T: Draw> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ struct `Screen` is reachable at visibility `pub(generics_trait)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `trait_object_demo2::Draw` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | trait Draw {
[INFO] [stdout]    | ^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `trait_object_demo2::Draw` is more private than the item `Screen<T>`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:45:1
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<T> Screen<T> where T: Draw {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation `Screen<T>` is reachable at visibility `pub(generics_trait)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `trait_object_demo2::Draw` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | trait Draw {
[INFO] [stdout]    | ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> src/method/method_demo1.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Circle{
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 3 |     x: f64,
[INFO] [stdout]   |     ^
[INFO] [stdout] 4 |     y: f64,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Circle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/method/method_demo3.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Write(String),
[INFO] [stdout]   |     ----- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     Write(String),
[INFO] [stdout] 6 +     Write(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Move` and `ChangeColor` are never constructed
[INFO] [stdout]  --> src/method/method_demo3.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 4 |     Quit,
[INFO] [stdout] 5 |     Move {x: i32, y: i32},
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Write(String),
[INFO] [stdout] 7 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest_2` is never used
[INFO] [stdout]   --> src/generics_trait/generics_demo1.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn largest_2<T: PartialOrd>(list: &[T])-> &T{
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generics_trait/generics_demo2.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Point<T>{
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/generics_trait/trait_demo1.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Post{
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `draw` is never used
[INFO] [stdout]  --> src/generics_trait/trait_object_demo1.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Draw{
[INFO] [stdout]   |           ---- method in this trait
[INFO] [stdout] 4 |     fn draw(&self);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `label` are never read
[INFO] [stdout]  --> src/generics_trait/trait_object_demo1.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Button{
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 7 |     pub width: u32,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 8 |     pub height: u32,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] 9 |     pub label: String,
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `options` are never read
[INFO] [stdout]   --> src/generics_trait/trait_object_demo1.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct SelectBox{
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 19 |     pub width: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 20 |     pub height: u32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 21 |     pub options: Vec<String>,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Screen` is never constructed
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Screen<T: Draw> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/generics_trait/trait_object_demo2.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl<T> Screen<T> where T: Draw {
[INFO] [stdout]    | ------------------------------- method in this implementation
[INFO] [stdout] 46 |     pub fn run(&self) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/array_map/array_demo2.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 |     V4(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 3 -     V4(String),
[INFO] [stdout] 3 +     V4(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/array_map/array_demo2.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     V6(String),
[INFO] [stdout]   |     -- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     V6(String),
[INFO] [stdout] 4 +     V6(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]  --> src/life_cycle/lifecycle_demo2.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct ImportantExcerpt<'a> {
[INFO] [stdout]   |        ---------------- field in this struct
[INFO] [stdout] 4 |     part: &'a str,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ImportantExcerpt` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]  --> src/life_cycle/lifecycle_demo3.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn first_word(s: &str) -> &str {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "27646f9b31ae68829e5278b20d1ec14683a2f17206c573d597e94bd9473283aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27646f9b31ae68829e5278b20d1ec14683a2f17206c573d597e94bd9473283aa", kill_on_drop: false }`
[INFO] [stdout] 27646f9b31ae68829e5278b20d1ec14683a2f17206c573d597e94bd9473283aa