[INFO] cloning repository https://github.com/cherry-yl-sh/rust_demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cherry-yl-sh/rust_demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcherry-yl-sh%2Frust_demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcherry-yl-sh%2Frust_demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c4ed0347e4f61e4494e319800efebec344db33d
[INFO] testing cherry-yl-sh/rust_demo against master#1871252fc8bb672d40787e67404e6eaae7059369 for pr-125151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcherry-yl-sh%2Frust_demo" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cherry-yl-sh/rust_demo on toolchain 1871252fc8bb672d40787e67404e6eaae7059369
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cherry-yl-sh/rust_demo
[INFO] finished tweaking git repo https://github.com/cherry-yl-sh/rust_demo
[INFO] tweaked toml for git repo https://github.com/cherry-yl-sh/rust_demo written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cherry-yl-sh/rust_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" "+1871252fc8bb672d40787e67404e6eaae7059369" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b1a1dfe732e0caab1e8aaeeaec86fe1f10845d79fc5267f1dbe98d84df74ea0
[INFO] running `Command { std: "docker" "start" "-a" "4b1a1dfe732e0caab1e8aaeeaec86fe1f10845d79fc5267f1dbe98d84df74ea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b1a1dfe732e0caab1e8aaeeaec86fe1f10845d79fc5267f1dbe98d84df74ea0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b1a1dfe732e0caab1e8aaeeaec86fe1f10845d79fc5267f1dbe98d84df74ea0", kill_on_drop: false }`
[INFO] [stdout] 4b1a1dfe732e0caab1e8aaeeaec86fe1f10845d79fc5267f1dbe98d84df74ea0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff2bad2ae4539d6d23aa50a085bc4f5c891b9e2f2d7eee174d5cdf8bb7806e8d
[INFO] running `Command { std: "docker" "start" "-a" "ff2bad2ae4539d6d23aa50a085bc4f5c891b9e2f2d7eee174d5cdf8bb7806e8d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::process::Output`
[INFO] [stdout]  --> src/test_trait.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::process::Output;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | mod test_trait;
[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/test_map.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/main.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | mod test_map;
[INFO] [stdout]   | ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/test_trait.rs:23:28
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/test_trait.rs:23:34
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `red`
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let red = Color(255, 0, 0);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_red`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let x = "hello";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:91:10
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let (x, y, z) = tup;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:91:16
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let (x, y, z) = tup;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/main.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let b = tup.1;
[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/main.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let c = tup.2;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let y = &mut x;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/main.rs:119:19
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn change_string (str : &String){
[INFO] [stdout]     |                   ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let x = 2.0;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:167:9
[INFO] [stdout]     |
[INFO] [stdout] 167 |     let y: f32 = 3.0;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/main.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let v: u16 = 38_u8 as u16;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let y = 5;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]    --> src/main.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 |     let c2 = 'b';
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v0`
[INFO] [stdout]    --> src/main.rs:204:9
[INFO] [stdout]     |
[INFO] [stdout] 204 |     let v0: () = ();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_v0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 236 |     let x = 10;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]   --> src/main.rs:29:19
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        -----      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Color(i32, (), ());
[INFO] [stdout]    |                   ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_user` is never used
[INFO] [stdout]   --> src/main.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn test_user(){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/main.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_string` is never used
[INFO] [stdout]   --> src/main.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn test_string(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_slice` is never used
[INFO] [stdout]   --> src/main.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn test_slice(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_tuple` is never used
[INFO] [stdout]   --> src/main.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn test_tuple(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_double_mut_evariable` is never used
[INFO] [stdout]    --> src/main.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn test_double_mut_evariable(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_immutable_borrow` is never used
[INFO] [stdout]    --> src/main.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn test_immutable_borrow() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_string` is never used
[INFO] [stdout]    --> src/main.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn change_string (str : &String){
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_mut_string` is never used
[INFO] [stdout]    --> src/main.rs:122:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | fn change_mut_string (str : &mut String){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_borrowing` is never used
[INFO] [stdout]    --> src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn test_borrowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_copy_transfer` is never used
[INFO] [stdout]    --> src/main.rs:133:4
[INFO] [stdout]     |
[INFO] [stdout] 133 | fn test_copy_transfer() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_copy` is never used
[INFO] [stdout]    --> src/main.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn make_copy(x: i32) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership` is never used
[INFO] [stdout]    --> src/main.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn take_ownership(s: String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_clone` is never used
[INFO] [stdout]    --> src/main.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn test_clone() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clear` is never used
[INFO] [stdout]    --> src/main.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn clear(text: &mut String) -> () {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:161:4
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_type` is never used
[INFO] [stdout]    --> src/main.rs:165:4
[INFO] [stdout]     |
[INFO] [stdout] 165 | fn test_type() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_na_n` is never used
[INFO] [stdout]    --> src/main.rs:170:4
[INFO] [stdout]     |
[INFO] [stdout] 170 | fn test_na_n() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_number` is never used
[INFO] [stdout]    --> src/main.rs:177:4
[INFO] [stdout]     |
[INFO] [stdout] 177 | fn test_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_char` is never used
[INFO] [stdout]    --> src/main.rs:196:4
[INFO] [stdout]     |
[INFO] [stdout] 196 | fn test_char() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_char` is never used
[INFO] [stdout]    --> src/main.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn print_char(c: char) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `type_of` is never used
[INFO] [stdout]    --> src/main.rs:218:4
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn type_of<T>(_: &T) -> String {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_range` is never used
[INFO] [stdout]    --> src/main.rs:222:4
[INFO] [stdout]     |
[INFO] [stdout] 222 | fn test_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_var` is never used
[INFO] [stdout]    --> src/main.rs:228:4
[INFO] [stdout]     |
[INFO] [stdout] 228 | fn test_var() {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_shadowing` is never used
[INFO] [stdout]    --> src/main.rs:235:4
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn test_shadowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]    --> src/main.rs:246:8
[INFO] [stdout]     |
[INFO] [stdout] 246 | struct Struct {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enum_test.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Message{
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Card` is never used
[INFO] [stdout]   --> src/enum_test.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum Card {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]   --> src/flow_test.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Direction {
[INFO] [stdout]    |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Action` is never used
[INFO] [stdout]   --> src/flow_test.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 24 | enum Action {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]  --> src/test_method.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Circle {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CircleBuilder` is never constructed
[INFO] [stdout]  --> src/test_method.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct CircleBuilder {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]   --> src/test_method.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum Color {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `call` are never used
[INFO] [stdout]   --> src/test_method.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Color {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 20 |     fn new() -> Color {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn call (&self) -> String {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area`, `new`, and `radius` are never used
[INFO] [stdout]   --> src/test_method.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Circle {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 34 |     pub fn area(&self) -> f64 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn new(radius: f64, x: f64, y: f64) -> Circle {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub  fn radius(&self) -> f64 {
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `grow` is never used
[INFO] [stdout]   --> src/test_method.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl Circle{
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 45 |     pub fn grow(&self, increment: f64) -> Circle {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/test_method.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `can_hold` are never used
[INFO] [stdout]   --> src/test_method.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl Rectangle {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 55 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/test_generics.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | 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/test_generics.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Point<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/test_generics.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 11 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_array` is never used
[INFO] [stdout]   --> src/test_generics.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn display_array<T: std::fmt::Debug, const N: usize>(arr :[T ;N]){
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `summarize` is never used
[INFO] [stdout]  --> src/test_trait.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Summary {
[INFO] [stdout]   |           ------- method in this trait
[INFO] [stdout] 6 |     fn summarize(&self) -> String;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/test_trait.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn notify<T: Summary + Display>(item: &T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> src/test_trait.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/test_trait.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct Twitter {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 35 |     reply: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     retweet: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sheep` is never constructed
[INFO] [stdout]   --> src/test_trait.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | struct Sheep {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]   --> src/test_trait.rs:84:7
[INFO] [stdout]    |
[INFO] [stdout] 84 | trait Animal {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_naked` and `shear` are never used
[INFO] [stdout]   --> src/test_trait.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 93 | impl Sheep {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] 94 |     fn is_naked(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     fn shear(&mut self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `draw` is never used
[INFO] [stdout]  --> src/test_trait_object.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Draw {
[INFO] [stdout]   |           ---- method in this trait
[INFO] [stdout] 2 |     fn draw(&self);
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Screen` is never constructed
[INFO] [stdout]   --> src/test_trait_object.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Screen {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/test_trait_object.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | impl Screen {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 40 |     pub fn run(&self) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 73 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "ff2bad2ae4539d6d23aa50a085bc4f5c891b9e2f2d7eee174d5cdf8bb7806e8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff2bad2ae4539d6d23aa50a085bc4f5c891b9e2f2d7eee174d5cdf8bb7806e8d", kill_on_drop: false }`
[INFO] [stdout] ff2bad2ae4539d6d23aa50a085bc4f5c891b9e2f2d7eee174d5cdf8bb7806e8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1814c9cadf03fba0b99fe8614d58f69274c6cd61c5978ac0cb0c91bedea596d
[INFO] running `Command { std: "docker" "start" "-a" "f1814c9cadf03fba0b99fe8614d58f69274c6cd61c5978ac0cb0c91bedea596d", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::process::Output`
[INFO] [stdout]  --> src/test_trait.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::process::Output;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c1`
[INFO] [stdout]  --> src/enum_test.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let c1 = Card::Club(1);
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]  --> src/enum_test.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let c2 = Card::Spades(2);
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m1`
[INFO] [stdout]  --> src/enum_test.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let m1 = Message::Quit;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_m1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m2`
[INFO] [stdout]  --> src/enum_test.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let m2 = Message::Move{x: 1, y: 2};
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_m2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m3`
[INFO] [stdout]  --> src/enum_test.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let m3 = Message::Write("Hello".to_string());
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_m3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> src/enum_test.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let some_number = Some(5);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `no_number`
[INFO] [stdout]   --> src/enum_test.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let no_number: Option<i32> = None;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_no_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tow`
[INFO] [stdout]  --> src/array_test.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let tow: [u8; 3] = [1, 2, 3];
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_tow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `copy_arr`
[INFO] [stdout]  --> src/array_test.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let copy_arr = [3; 5];
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_copy_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple patterns overlap on their endpoints
[INFO] [stdout]   --> src/flow_test.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         1..=5 => println!("1..5"),
[INFO] [stdout]    |         ----- this range overlaps on `5_i32`...
[INFO] [stdout] 73 |         5..=10 => println!("5..=10"),
[INFO] [stdout]    |         ^^^^^^ ... with this range
[INFO] [stdout]    |
[INFO] [stdout]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stdout]    = note: `#[warn(overlapping_range_endpoints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/test_trait.rs:23:28
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                            ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/test_trait.rs:23:34
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/test_trait.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |     let s = 3.to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/test_trait.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let a = 19;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b_str`
[INFO] [stdout]   --> src/test_trait.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let b_str = b.to_string();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_b_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/test_trait.rs:131:9
[INFO] [stdout]     |
[INFO] [stdout] 131 |     let mut dolly: Sheep = Animal::new("Dolly".to_string());
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arr`
[INFO] [stdout]   --> src/test_vector.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let arr = vec![1, 2, 3];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `red`
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let red = Color(255, 0, 0);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_red`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let x = "hello";
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:91:10
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let (x, y, z) = tup;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:91:16
[INFO] [stdout]    |
[INFO] [stdout] 91 |     let (x, y, z) = tup;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/main.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 95 |     let b = tup.1;
[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/main.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let c = tup.2;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let y = &mut x;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/main.rs:119:19
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn change_string (str : &String){
[INFO] [stdout]     |                   ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let x = 2.0;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:167:9
[INFO] [stdout]     |
[INFO] [stdout] 167 |     let y: f32 = 3.0;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> src/main.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 178 |     let v: u16 = 38_u8 as u16;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/main.rs:187:9
[INFO] [stdout]     |
[INFO] [stdout] 187 |     let y = 5;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c2`
[INFO] [stdout]    --> src/main.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 |     let c2 = 'b';
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v0`
[INFO] [stdout]    --> src/main.rs:204:9
[INFO] [stdout]     |
[INFO] [stdout] 204 |     let v0: () = ();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_v0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/main.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 236 |     let x = 10;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]   --> src/main.rs:29:19
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        -----      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Color(i32, (), ());
[INFO] [stdout]    |                   ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_user` is never used
[INFO] [stdout]   --> src/main.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn test_user(){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/main.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_string` is never used
[INFO] [stdout]   --> src/main.rs:65:4
[INFO] [stdout]    |
[INFO] [stdout] 65 | fn test_string(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_slice` is never used
[INFO] [stdout]   --> src/main.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn test_slice(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_tuple` is never used
[INFO] [stdout]   --> src/main.rs:89:4
[INFO] [stdout]    |
[INFO] [stdout] 89 | fn test_tuple(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_double_mut_evariable` is never used
[INFO] [stdout]    --> src/main.rs:107:4
[INFO] [stdout]     |
[INFO] [stdout] 107 | fn test_double_mut_evariable(){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_immutable_borrow` is never used
[INFO] [stdout]    --> src/main.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn test_immutable_borrow() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_string` is never used
[INFO] [stdout]    --> src/main.rs:119:4
[INFO] [stdout]     |
[INFO] [stdout] 119 | fn change_string (str : &String){
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_mut_string` is never used
[INFO] [stdout]    --> src/main.rs:122:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | fn change_mut_string (str : &mut String){
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_borrowing` is never used
[INFO] [stdout]    --> src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn test_borrowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_copy_transfer` is never used
[INFO] [stdout]    --> src/main.rs:133:4
[INFO] [stdout]     |
[INFO] [stdout] 133 | fn test_copy_transfer() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_copy` is never used
[INFO] [stdout]    --> src/main.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn make_copy(x: i32) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_ownership` is never used
[INFO] [stdout]    --> src/main.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn take_ownership(s: String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_clone` is never used
[INFO] [stdout]    --> src/main.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn test_clone() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clear` is never used
[INFO] [stdout]    --> src/main.rs:157:4
[INFO] [stdout]     |
[INFO] [stdout] 157 | fn clear(text: &mut String) -> () {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:161:4
[INFO] [stdout]     |
[INFO] [stdout] 161 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_type` is never used
[INFO] [stdout]    --> src/main.rs:165:4
[INFO] [stdout]     |
[INFO] [stdout] 165 | fn test_type() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_na_n` is never used
[INFO] [stdout]    --> src/main.rs:170:4
[INFO] [stdout]     |
[INFO] [stdout] 170 | fn test_na_n() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_number` is never used
[INFO] [stdout]    --> src/main.rs:177:4
[INFO] [stdout]     |
[INFO] [stdout] 177 | fn test_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_char` is never used
[INFO] [stdout]    --> src/main.rs:196:4
[INFO] [stdout]     |
[INFO] [stdout] 196 | fn test_char() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_char` is never used
[INFO] [stdout]    --> src/main.rs:214:4
[INFO] [stdout]     |
[INFO] [stdout] 214 | fn print_char(c: char) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `type_of` is never used
[INFO] [stdout]    --> src/main.rs:218:4
[INFO] [stdout]     |
[INFO] [stdout] 218 | fn type_of<T>(_: &T) -> String {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_range` is never used
[INFO] [stdout]    --> src/main.rs:222:4
[INFO] [stdout]     |
[INFO] [stdout] 222 | fn test_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_var` is never used
[INFO] [stdout]    --> src/main.rs:228:4
[INFO] [stdout]     |
[INFO] [stdout] 228 | fn test_var() {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_shadowing` is never used
[INFO] [stdout]    --> src/main.rs:235:4
[INFO] [stdout]     |
[INFO] [stdout] 235 | fn test_shadowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]    --> src/main.rs:246:8
[INFO] [stdout]     |
[INFO] [stdout] 246 | struct Struct {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> src/enum_test.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Move{x: i32, y: i32},
[INFO] [stdout]    |     ---- ^       ^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enum_test.rs:16:11
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Write(String),
[INFO] [stdout]    |     ----- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Write(()),
[INFO] [stdout]    |           ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `ChangeColor` is never constructed
[INFO] [stdout]   --> src/enum_test.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Message{
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 17 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enum_test.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Club(u8),
[INFO] [stdout]    |     ---- ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[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] 21 |     Club(()),
[INFO] [stdout]    |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enum_test.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Spades(u8),
[INFO] [stdout]    |     ------ ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[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] 22 |     Spades(()),
[INFO] [stdout]    |            ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Down`, `Left`, and `Right` are never constructed
[INFO] [stdout]   --> src/flow_test.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | enum Direction {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 17 |     Up,
[INFO] [stdout] 18 |     Down,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 19 |     Left,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 20 |     Right,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Direction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> src/test_method.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Circle {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 3 |     radius: f64,
[INFO] [stdout] 4 |     x : f64,
[INFO] [stdout]   |     ^
[INFO] [stdout] 5 |     y : f64,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CircleBuilder` is never constructed
[INFO] [stdout]  --> src/test_method.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct CircleBuilder {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Hsv` is never constructed
[INFO] [stdout]   --> src/test_method.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum Color {
[INFO] [stdout]    |      ----- variant in this enum
[INFO] [stdout] 16 |     Rgb(u8, u8, u8),
[INFO] [stdout] 17 |     Hsv(u8, u8, u8),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `radius` is never used
[INFO] [stdout]   --> src/test_method.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Circle {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 40 |     pub  fn radius(&self) -> f64 {
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `grow` is never used
[INFO] [stdout]   --> src/test_method.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl Circle{
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 45 |     pub fn grow(&self, increment: f64) -> Circle {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/test_method.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `area` and `can_hold` are never used
[INFO] [stdout]   --> src/test_method.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl Rectangle {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 55 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]  --> src/test_generics.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Point<T> {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 6 |     x: T,
[INFO] [stdout] 7 |     y: T,
[INFO] [stdout]   |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `summarize` is never used
[INFO] [stdout]  --> src/test_trait.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Summary {
[INFO] [stdout]   |           ------- method in this trait
[INFO] [stdout] 6 |     fn summarize(&self) -> String;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/test_trait.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn notify<T: Summary + Display>(item: &T) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_function` is never used
[INFO] [stdout]   --> src/test_trait.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/test_trait.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct Twitter {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 35 |     reply: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     retweet: bool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `shear` is never used
[INFO] [stdout]   --> src/test_trait.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 93 | impl Sheep {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 98 |     fn shear(&mut self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 80 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "f1814c9cadf03fba0b99fe8614d58f69274c6cd61c5978ac0cb0c91bedea596d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1814c9cadf03fba0b99fe8614d58f69274c6cd61c5978ac0cb0c91bedea596d", kill_on_drop: false }`
[INFO] [stdout] f1814c9cadf03fba0b99fe8614d58f69274c6cd61c5978ac0cb0c91bedea596d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+1871252fc8bb672d40787e67404e6eaae7059369" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9ee4474804116a80aa6357c59f3f2b8cb43bbc36419da36c591522c763a3da6f
[INFO] running `Command { std: "docker" "start" "-a" "9ee4474804116a80aa6357c59f3f2b8cb43bbc36419da36c591522c763a3da6f", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::process::Output`
[INFO] [stderr]  --> src/test_trait.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::process::Output;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c1`
[INFO] [stderr]  --> src/enum_test.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let c1 = Card::Club(1);
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_c1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c2`
[INFO] [stderr]  --> src/enum_test.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let c2 = Card::Spades(2);
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m1`
[INFO] [stderr]  --> src/enum_test.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let m1 = Message::Quit;
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_m1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m2`
[INFO] [stderr]  --> src/enum_test.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let m2 = Message::Move{x: 1, y: 2};
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_m2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m3`
[INFO] [stderr]  --> src/enum_test.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let m3 = Message::Write("Hello".to_string());
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_m3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_number`
[INFO] [stderr]   --> src/enum_test.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let some_number = Some(5);
[INFO] [stderr]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `no_number`
[INFO] [stderr]   --> src/enum_test.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let no_number: Option<i32> = None;
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_no_number`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tow`
[INFO] [stderr]  --> src/array_test.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let tow: [u8; 3] = [1, 2, 3];
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_tow`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `copy_arr`
[INFO] [stderr]  --> src/array_test.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let copy_arr = [3; 5];
[INFO] [stderr]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_copy_arr`
[INFO] [stderr] 
[INFO] [stderr] warning: multiple patterns overlap on their endpoints
[INFO] [stderr]   --> src/flow_test.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |         1..=5 => println!("1..5"),
[INFO] [stderr]    |         ----- this range overlaps on `5_i32`...
[INFO] [stderr] 73 |         5..=10 => println!("5..=10"),
[INFO] [stderr]    |         ^^^^^^ ... with this range
[INFO] [stderr]    |
[INFO] [stderr]    = note: you likely meant to write mutually exclusive ranges
[INFO] [stderr]    = note: `#[warn(overlapping_range_endpoints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/test_trait.rs:23:28
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |                            ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/test_trait.rs:23:34
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |                                  ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/test_trait.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |     let s = 3.to_string();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/test_trait.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let a = 19;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b_str`
[INFO] [stderr]   --> src/test_trait.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let b_str = b.to_string();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_b_str`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/test_trait.rs:131:9
[INFO] [stderr]     |
[INFO] [stderr] 131 |     let mut dolly: Sheep = Animal::new("Dolly".to_string());
[INFO] [stderr]     |         ----^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `arr`
[INFO] [stderr]   --> src/test_vector.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let arr = vec![1, 2, 3];
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_arr`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `red`
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let red = Color(255, 0, 0);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_red`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let x = "hello";
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:91:10
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let (x, y, z) = tup;
[INFO] [stderr]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:91:16
[INFO] [stderr]    |
[INFO] [stderr] 91 |     let (x, y, z) = tup;
[INFO] [stderr]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/main.rs:95:9
[INFO] [stderr]    |
[INFO] [stderr] 95 |     let b = tup.1;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/main.rs:96:9
[INFO] [stderr]    |
[INFO] [stderr] 96 |     let c = tup.2;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/main.rs:109:9
[INFO] [stderr]     |
[INFO] [stderr] 109 |     let y = &mut x;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]    --> src/main.rs:119:19
[INFO] [stderr]     |
[INFO] [stderr] 119 | fn change_string (str : &String){
[INFO] [stderr]     |                   ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/main.rs:166:9
[INFO] [stderr]     |
[INFO] [stderr] 166 |     let x = 2.0;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/main.rs:167:9
[INFO] [stderr]     |
[INFO] [stderr] 167 |     let y: f32 = 3.0;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]    --> src/main.rs:178:9
[INFO] [stderr]     |
[INFO] [stderr] 178 |     let v: u16 = 38_u8 as u16;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/main.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |     let y = 5;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c2`
[INFO] [stderr]    --> src/main.rs:198:9
[INFO] [stderr]     |
[INFO] [stderr] 198 |     let c2 = 'b';
[INFO] [stderr]     |         ^^ help: if this is intentional, prefix it with an underscore: `_c2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v0`
[INFO] [stderr]    --> src/main.rs:204:9
[INFO] [stderr]     |
[INFO] [stderr] 204 |     let v0: () = ();
[INFO] [stderr]     |         ^^ help: if this is intentional, prefix it with an underscore: `_v0`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/main.rs:236:9
[INFO] [stderr]     |
[INFO] [stderr] 236 |     let x = 10;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `1` and `2` are never read
[INFO] [stderr]   --> src/main.rs:29:19
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Color(i32, i32, i32);
[INFO] [stderr]    |        -----      ^^^  ^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        fields in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Color(i32, (), ());
[INFO] [stderr]    |                   ~~  ~~
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]   --> src/main.rs:35:8
[INFO] [stderr]    |
[INFO] [stderr] 35 | struct User {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_user` is never used
[INFO] [stderr]   --> src/main.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn test_user(){
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `build_user` is never used
[INFO] [stderr]   --> src/main.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn build_user(email: String, username: String) -> User {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_string` is never used
[INFO] [stderr]   --> src/main.rs:65:4
[INFO] [stderr]    |
[INFO] [stderr] 65 | fn test_string(){
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_slice` is never used
[INFO] [stderr]   --> src/main.rs:82:4
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn test_slice(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_tuple` is never used
[INFO] [stderr]   --> src/main.rs:89:4
[INFO] [stderr]    |
[INFO] [stderr] 89 | fn test_tuple(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_double_mut_evariable` is never used
[INFO] [stderr]    --> src/main.rs:107:4
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn test_double_mut_evariable(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_immutable_borrow` is never used
[INFO] [stderr]    --> src/main.rs:113:4
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn test_immutable_borrow() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `change_string` is never used
[INFO] [stderr]    --> src/main.rs:119:4
[INFO] [stderr]     |
[INFO] [stderr] 119 | fn change_string (str : &String){
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `change_mut_string` is never used
[INFO] [stderr]    --> src/main.rs:122:4
[INFO] [stderr]     |
[INFO] [stderr] 122 | fn change_mut_string (str : &mut String){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_borrowing` is never used
[INFO] [stderr]    --> src/main.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn test_borrowing() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_copy_transfer` is never used
[INFO] [stderr]    --> src/main.rs:133:4
[INFO] [stderr]     |
[INFO] [stderr] 133 | fn test_copy_transfer() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `make_copy` is never used
[INFO] [stderr]    --> src/main.rs:143:4
[INFO] [stderr]     |
[INFO] [stderr] 143 | fn make_copy(x: i32) {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `take_ownership` is never used
[INFO] [stderr]    --> src/main.rs:147:4
[INFO] [stderr]     |
[INFO] [stderr] 147 | fn take_ownership(s: String) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_clone` is never used
[INFO] [stderr]    --> src/main.rs:151:4
[INFO] [stderr]     |
[INFO] [stderr] 151 | fn test_clone() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `clear` is never used
[INFO] [stderr]    --> src/main.rs:157:4
[INFO] [stderr]     |
[INFO] [stderr] 157 | fn clear(text: &mut String) -> () {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]    --> src/main.rs:161:4
[INFO] [stderr]     |
[INFO] [stderr] 161 | fn add(x: i32, y: i32) -> i32 {
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_type` is never used
[INFO] [stderr]    --> src/main.rs:165:4
[INFO] [stderr]     |
[INFO] [stderr] 165 | fn test_type() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_na_n` is never used
[INFO] [stderr]    --> src/main.rs:170:4
[INFO] [stderr]     |
[INFO] [stderr] 170 | fn test_na_n() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_number` is never used
[INFO] [stderr]    --> src/main.rs:177:4
[INFO] [stderr]     |
[INFO] [stderr] 177 | fn test_number() {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_char` is never used
[INFO] [stderr]    --> src/main.rs:196:4
[INFO] [stderr]     |
[INFO] [stderr] 196 | fn test_char() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_char` is never used
[INFO] [stderr]    --> src/main.rs:214:4
[INFO] [stderr]     |
[INFO] [stderr] 214 | fn print_char(c: char) {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `type_of` is never used
[INFO] [stderr]    --> src/main.rs:218:4
[INFO] [stderr]     |
[INFO] [stderr] 218 | fn type_of<T>(_: &T) -> String {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_range` is never used
[INFO] [stderr]    --> src/main.rs:222:4
[INFO] [stderr]     |
[INFO] [stderr] 222 | fn test_range() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_var` is never used
[INFO] [stderr]    --> src/main.rs:228:4
[INFO] [stderr]     |
[INFO] [stderr] 228 | fn test_var() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_shadowing` is never used
[INFO] [stderr]    --> src/main.rs:235:4
[INFO] [stderr]     |
[INFO] [stderr] 235 | fn test_shadowing() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Struct` is never constructed
[INFO] [stderr]    --> src/main.rs:246:8
[INFO] [stderr]     |
[INFO] [stderr] 246 | struct Struct {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `x` and `y` are never read
[INFO] [stderr]   --> src/enum_test.rs:15:10
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Move{x: i32, y: i32},
[INFO] [stderr]    |     ---- ^       ^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     fields in this variant
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/enum_test.rs:16:11
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Write(String),
[INFO] [stderr]    |     ----- ^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Write(()),
[INFO] [stderr]    |           ~~
[INFO] [stderr] 
[INFO] [stderr] warning: variant `ChangeColor` is never constructed
[INFO] [stderr]   --> src/enum_test.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | enum Message{
[INFO] [stderr]    |      ------- variant in this enum
[INFO] [stderr] ...
[INFO] [stderr] 17 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/enum_test.rs:21:10
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Club(u8),
[INFO] [stderr]    |     ---- ^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 21 |     Club(()),
[INFO] [stderr]    |          ~~
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/enum_test.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     Spades(u8),
[INFO] [stderr]    |     ------ ^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 22 |     Spades(()),
[INFO] [stderr]    |            ~~
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Down`, `Left`, and `Right` are never constructed
[INFO] [stderr]   --> src/flow_test.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | enum Direction {
[INFO] [stderr]    |      --------- variants in this enum
[INFO] [stderr] 17 |     Up,
[INFO] [stderr] 18 |     Down,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 19 |     Left,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 20 |     Right,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Direction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `x` and `y` are never read
[INFO] [stderr]  --> src/test_method.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Circle {
[INFO] [stderr]   |            ------ fields in this struct
[INFO] [stderr] 3 |     radius: f64,
[INFO] [stderr] 4 |     x : f64,
[INFO] [stderr]   |     ^
[INFO] [stderr] 5 |     y : f64,
[INFO] [stderr]   |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `CircleBuilder` is never constructed
[INFO] [stderr]  --> src/test_method.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct CircleBuilder {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Hsv` is never constructed
[INFO] [stderr]   --> src/test_method.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | enum Color {
[INFO] [stderr]    |      ----- variant in this enum
[INFO] [stderr] 16 |     Rgb(u8, u8, u8),
[INFO] [stderr] 17 |     Hsv(u8, u8, u8),
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `radius` is never used
[INFO] [stderr]   --> src/test_method.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl Circle {
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 40 |     pub  fn radius(&self) -> f64 {
[INFO] [stderr]    |             ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `grow` is never used
[INFO] [stderr]   --> src/test_method.rs:45:12
[INFO] [stderr]    |
[INFO] [stderr] 44 | impl Circle{
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] 45 |     pub fn grow(&self, increment: f64) -> Circle {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]   --> src/test_method.rs:50:8
[INFO] [stderr]    |
[INFO] [stderr] 50 | struct Rectangle {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `area` and `can_hold` are never used
[INFO] [stderr]   --> src/test_method.rs:55:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | impl Rectangle {
[INFO] [stderr]    | -------------- methods in this implementation
[INFO] [stderr] 55 |     fn area(&self) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 58 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `y` is never read
[INFO] [stderr]  --> src/test_generics.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | struct Point<T> {
[INFO] [stderr]   |        ----- field in this struct
[INFO] [stderr] 6 |     x: T,
[INFO] [stderr] 7 |     y: T,
[INFO] [stderr]   |     ^
[INFO] [stderr] 
[INFO] [stderr] warning: method `summarize` is never used
[INFO] [stderr]  --> src/test_trait.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub trait Summary {
[INFO] [stderr]   |           ------- method in this trait
[INFO] [stderr] 6 |     fn summarize(&self) -> String;
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `notify` is never used
[INFO] [stderr]   --> src/test_trait.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn notify<T: Summary + Display>(item: &T) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `some_function` is never used
[INFO] [stderr]   --> src/test_trait.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn some_function<T, U>(t: T, u: U) -> i32
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `reply` and `retweet` are never read
[INFO] [stderr]   --> src/test_trait.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub struct Twitter {
[INFO] [stderr]    |            ------- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 35 |     reply: bool,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 36 |     retweet: bool,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `shear` is never used
[INFO] [stderr]   --> src/test_trait.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 93 | impl Sheep {
[INFO] [stderr]    | ---------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 98 |     fn shear(&mut self) {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_demo` (bin "rust_demo" test) generated 80 warnings (run `cargo fix --bin "rust_demo" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_demo-0481d94b70a1d990)
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test array_test::array_test ... ok
[INFO] [stdout] test test_map::test_map ... ok
[INFO] [stdout] test test_generics::test_generics ... ok
[INFO] [stdout] test enum_test::enum_test ... ok
[INFO] [stdout] test flow_test::test_multi_math ... ok
[INFO] [stdout] test test_trait::test_point ... ok
[INFO] [stdout] test test_trait::test_notify ... ok
[INFO] [stdout] test test_trait::test_sheep ... ok
[INFO] [stdout] test test_method::method_impl ... ok
[INFO] [stdout] test test_trait_object::test_screen ... ok
[INFO] [stdout] test flow_test::test_match ... ok
[INFO] [stdout] test test_vector::test_vector ... ok
[INFO] [stdout] test flow_test::flow ... ok
[INFO] [stdout] test test_error::test_error ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- test_error::test_error stdout ----
[INFO] [stdout] thread 'test_error::test_error' panicked at src/test_error.rs:3:5:
[INFO] [stdout] Make this test fail
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x557c80549a25 - std::backtrace_rs::backtrace::libunwind::trace::h59d96bdb08384354
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
[INFO] [stdout]    1:     0x557c80549a25 - std::backtrace_rs::backtrace::trace_unsynchronized::h9cf5becacfc93fba
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
[INFO] [stdout]    2:     0x557c80549a25 - std::sys_common::backtrace::_print_fmt::h10b76d10405dbd48
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:68:5
[INFO] [stdout]    3:     0x557c80549a25 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6ed9e62a156d84e4
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:44:22
[INFO] [stdout]    4:     0x557c8057026b - core::fmt::rt::Argument::fmt::h645c680983f03c9f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/rt.rs:165:63
[INFO] [stdout]    5:     0x557c8057026b - core::fmt::write::h8bcd80919a02be29
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/fmt/mod.rs:1169:21
[INFO] [stdout]    6:     0x557c8054725f - std::io::Write::write_fmt::h8d0c47c662cad79c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/io/mod.rs:1835:15
[INFO] [stdout]    7:     0x557c805497fe - std::sys_common::backtrace::_print::h6306f131a28d62b0
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:47:5
[INFO] [stdout]    8:     0x557c805497fe - std::sys_common::backtrace::print::h7079288e0a26dfcc
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:34:9
[INFO] [stdout]    9:     0x557c8054b229 - std::panicking::default_hook::{{closure}}::hb063ecec81a736ba
[INFO] [stdout]   10:     0x557c8054aeee - std::panicking::default_hook::hd56ee406bf547b5c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:295:9
[INFO] [stdout]   11:     0x557c8051c14a - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::he5eacdef44c8728f
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   12:     0x557c8051c14a - test::test_main::{{closure}}::h0ec9aed229e79095
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:137:21
[INFO] [stdout]   13:     0x557c8054b82b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hcbd0d80e1ad4e4f9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2036:9
[INFO] [stdout]   14:     0x557c8054b82b - std::panicking::rust_panic_with_hook::h624aa3ca42ebb8f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:799:13
[INFO] [stdout]   15:     0x557c8054b56b - std::panicking::begin_panic_handler::{{closure}}::hbc4e76194a5e287c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:656:13
[INFO] [stdout]   16:     0x557c80549ee9 - std::sys_common::backtrace::__rust_end_short_backtrace::h847fedc9d1ff7b6d
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:171:18
[INFO] [stdout]   17:     0x557c8054b2d7 - rust_begin_unwind
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:652:5
[INFO] [stdout]   18:     0x557c804d6843 - core::panicking::panic_fmt::hec11a924b87ce965
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panicking.rs:72:14
[INFO] [stdout]   19:     0x557c804e15a2 - rust_demo::test_error::test_error::hf05daee22b744b90
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test_error.rs:3:5
[INFO] [stdout]   20:     0x557c804e1557 - rust_demo::test_error::test_error::{{closure}}::h07d3d2e56c72b373
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test_error.rs:2:16
[INFO] [stdout]   21:     0x557c804e2706 - core::ops::function::FnOnce::call_once::he7d14a9edea214de
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x557c80520b2b - core::ops::function::FnOnce::call_once::h2e43a8f6f3d94b99
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x557c80520b2b - test::__rust_begin_short_backtrace::h214c9f2d2d3fee90
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:625:18
[INFO] [stdout]   24:     0x557c80520231 - test::run_test_in_process::{{closure}}::h510b7ba7990692a5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:60
[INFO] [stdout]   25:     0x557c80520231 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4157186197a93871
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x557c80520231 - std::panicking::try::do_call::h1bf2463bccd4b28c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   27:     0x557c80520231 - std::panicking::try::hd6d4808c9fab4fa5
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   28:     0x557c80520231 - std::panic::catch_unwind::hd5641d97d123f9f2
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   29:     0x557c80520231 - test::run_test_in_process::hc273b71c8b878a4c
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:648:27
[INFO] [stdout]   30:     0x557c80520231 - test::run_test::{{closure}}::h6838df834eb8467e
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:569:43
[INFO] [stdout]   31:     0x557c804e8bf4 - test::run_test::{{closure}}::h608b98ecff5665fb
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/test/src/lib.rs:599:41
[INFO] [stdout]   32:     0x557c804e8bf4 - std::sys_common::backtrace::__rust_begin_short_backtrace::hdc4182b97d1042e9
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys_common/backtrace.rs:155:18
[INFO] [stdout]   33:     0x557c804ed622 - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h571773fd21d674c8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:542:17
[INFO] [stdout]   34:     0x557c804ed622 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hdcd384cf2fa70ba3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x557c804ed622 - std::panicking::try::do_call::h4f1a44bd81423be1
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:559:40
[INFO] [stdout]   36:     0x557c804ed622 - std::panicking::try::h5e02afcb81dcd361
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panicking.rs:523:19
[INFO] [stdout]   37:     0x557c804ed622 - std::panic::catch_unwind::h022f75775bfd8c45
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/panic.rs:149:14
[INFO] [stdout]   38:     0x557c804ed622 - std::thread::Builder::spawn_unchecked_::{{closure}}::hf5a62e9e4e6df1f8
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/thread/mod.rs:541:30
[INFO] [stdout]   39:     0x557c804ed622 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h6d56360aeb9509a7
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x557c8054fa0b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7a343dc551c06baa
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   41:     0x557c8054fa0b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h30b8111cbaa644f3
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/alloc/src/boxed.rs:2022:9
[INFO] [stdout]   42:     0x557c8054fa0b - std::sys::pal::unix::thread::Thread::new::thread_start::h7404e134e61e7a11
[INFO] [stdout]                                at /rustc/1871252fc8bb672d40787e67404e6eaae7059369/library/std/src/sys/pal/unix/thread.rs:108:17
[INFO] [stdout]   43:     0x7f75025b5ac3 - <unknown>
[INFO] [stdout]   44:     0x7f7502646a04 - __clone
[INFO] [stdout]   45:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     test_error::test_error
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 13 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--bin rust_demo`
[INFO] running `Command { std: "docker" "inspect" "9ee4474804116a80aa6357c59f3f2b8cb43bbc36419da36c591522c763a3da6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ee4474804116a80aa6357c59f3f2b8cb43bbc36419da36c591522c763a3da6f", kill_on_drop: false }`
[INFO] [stdout] 9ee4474804116a80aa6357c59f3f2b8cb43bbc36419da36c591522c763a3da6f
