[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] b213b6f8fe5a32e4f026c4c7b35f026bf366cd82
[INFO] testing cherry-yl-sh/rust_demo against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcherry-yl-sh%2Frust_demo" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[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-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cherry-yl-sh/rust_demo on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a28fc9193f03aeee96f644a2558c99dbf37c10ce41910261878aeda90f3147d
[INFO] running `Command { std: "docker" "start" "-a" "6a28fc9193f03aeee96f644a2558c99dbf37c10ce41910261878aeda90f3147d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a28fc9193f03aeee96f644a2558c99dbf37c10ce41910261878aeda90f3147d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a28fc9193f03aeee96f644a2558c99dbf37c10ce41910261878aeda90f3147d", kill_on_drop: false }`
[INFO] [stdout] 6a28fc9193f03aeee96f644a2558c99dbf37c10ce41910261878aeda90f3147d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a85d1d19d784bd3d78c761f0f6f2bc5ad22094696262462008da2471e610c73e
[INFO] running `Command { std: "docker" "start" "-a" "a85d1d19d784bd3d78c761f0f6f2bc5ad22094696262462008da2471e610c73e", 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:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     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:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     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:92:10
[INFO] [stdout]    |
[INFO] [stdout] 92 |     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:92:16
[INFO] [stdout]    |
[INFO] [stdout] 92 |     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:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     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:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     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:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     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:120:19
[INFO] [stdout]     |
[INFO] [stdout] 120 | 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:167:9
[INFO] [stdout]     |
[INFO] [stdout] 167 |     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:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |     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:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |     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:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |     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:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     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:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     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:237:9
[INFO] [stdout]     |
[INFO] [stdout] 237 |     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:30:19
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        -----      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_user` is never used
[INFO] [stdout]   --> src/main.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn test_user(){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/main.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | 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:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_string(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_slice` is never used
[INFO] [stdout]   --> src/main.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn test_slice(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_tuple` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | 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:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | 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:114:4
[INFO] [stdout]     |
[INFO] [stdout] 114 | fn test_immutable_borrow() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_string` is never used
[INFO] [stdout]    --> src/main.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | 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:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | 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:126:4
[INFO] [stdout]     |
[INFO] [stdout] 126 | fn test_borrowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_copy_transfer` is never used
[INFO] [stdout]    --> src/main.rs:134:4
[INFO] [stdout]     |
[INFO] [stdout] 134 | fn test_copy_transfer() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_copy` is never used
[INFO] [stdout]    --> src/main.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | 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:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | 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:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn test_clone() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clear` is never used
[INFO] [stdout]    --> src/main.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn clear(text: &mut String) -> () {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | 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:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn test_type() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_na_n` is never used
[INFO] [stdout]    --> src/main.rs:171:4
[INFO] [stdout]     |
[INFO] [stdout] 171 | fn test_na_n() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_number` is never used
[INFO] [stdout]    --> src/main.rs:178:4
[INFO] [stdout]     |
[INFO] [stdout] 178 | fn test_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_char` is never used
[INFO] [stdout]    --> src/main.rs:197:4
[INFO] [stdout]     |
[INFO] [stdout] 197 | fn test_char() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_char` is never used
[INFO] [stdout]    --> src/main.rs:215:4
[INFO] [stdout]     |
[INFO] [stdout] 215 | 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:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | 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:223:4
[INFO] [stdout]     |
[INFO] [stdout] 223 | fn test_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_var` is never used
[INFO] [stdout]    --> src/main.rs:229:4
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn test_var() {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_shadowing` is never used
[INFO] [stdout]    --> src/main.rs:236:4
[INFO] [stdout]     |
[INFO] [stdout] 236 | fn test_shadowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]    --> src/main.rs:247:8
[INFO] [stdout]     |
[INFO] [stdout] 247 | 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: trait `Summary` is never used
[INFO] [stdout]  --> src/test_trait.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Summary {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]  --> src/test_trait.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Post {
[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: struct `Twitter` is never constructed
[INFO] [stdout]   --> src/test_trait.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct Twitter {
[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: trait `Draw` is never used
[INFO] [stdout]  --> src/test_trait_object.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Draw {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Button` is never constructed
[INFO] [stdout]  --> src/test_trait_object.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Button {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SelectBox` is never constructed
[INFO] [stdout]   --> src/test_trait_object.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct SelectBox {
[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: function `longest` is never used
[INFO] [stdout]  --> src/lifecrycle.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "a85d1d19d784bd3d78c761f0f6f2bc5ad22094696262462008da2471e610c73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a85d1d19d784bd3d78c761f0f6f2bc5ad22094696262462008da2471e610c73e", kill_on_drop: false }`
[INFO] [stdout] a85d1d19d784bd3d78c761f0f6f2bc5ad22094696262462008da2471e610c73e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf82534703bf86c957f9a30bc7f36ffc093c29ecb4c62ae8acae204df0b607bc
[INFO] running `Command { std: "docker" "start" "-a" "bf82534703bf86c957f9a30bc7f36ffc093c29ecb4c62ae8acae204df0b607bc", 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:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     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:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     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:92:10
[INFO] [stdout]    |
[INFO] [stdout] 92 |     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:92:16
[INFO] [stdout]    |
[INFO] [stdout] 92 |     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:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     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:97:9
[INFO] [stdout]    |
[INFO] [stdout] 97 |     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:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 |     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:120:19
[INFO] [stdout]     |
[INFO] [stdout] 120 | 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:167:9
[INFO] [stdout]     |
[INFO] [stdout] 167 |     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:168:9
[INFO] [stdout]     |
[INFO] [stdout] 168 |     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:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |     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:188:9
[INFO] [stdout]     |
[INFO] [stdout] 188 |     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:199:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     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:205:9
[INFO] [stdout]     |
[INFO] [stdout] 205 |     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:237:9
[INFO] [stdout]     |
[INFO] [stdout] 237 |     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:30:19
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        -----      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_user` is never used
[INFO] [stdout]   --> src/main.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn test_user(){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/main.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | 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:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_string(){
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_slice` is never used
[INFO] [stdout]   --> src/main.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn test_slice(){
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_tuple` is never used
[INFO] [stdout]   --> src/main.rs:90:4
[INFO] [stdout]    |
[INFO] [stdout] 90 | 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:108:4
[INFO] [stdout]     |
[INFO] [stdout] 108 | 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:114:4
[INFO] [stdout]     |
[INFO] [stdout] 114 | fn test_immutable_borrow() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_string` is never used
[INFO] [stdout]    --> src/main.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | 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:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | 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:126:4
[INFO] [stdout]     |
[INFO] [stdout] 126 | fn test_borrowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_copy_transfer` is never used
[INFO] [stdout]    --> src/main.rs:134:4
[INFO] [stdout]     |
[INFO] [stdout] 134 | fn test_copy_transfer() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_copy` is never used
[INFO] [stdout]    --> src/main.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | 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:148:4
[INFO] [stdout]     |
[INFO] [stdout] 148 | 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:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn test_clone() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clear` is never used
[INFO] [stdout]    --> src/main.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn clear(text: &mut String) -> () {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/main.rs:162:4
[INFO] [stdout]     |
[INFO] [stdout] 162 | 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:166:4
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn test_type() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_na_n` is never used
[INFO] [stdout]    --> src/main.rs:171:4
[INFO] [stdout]     |
[INFO] [stdout] 171 | fn test_na_n() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_number` is never used
[INFO] [stdout]    --> src/main.rs:178:4
[INFO] [stdout]     |
[INFO] [stdout] 178 | fn test_number() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_char` is never used
[INFO] [stdout]    --> src/main.rs:197:4
[INFO] [stdout]     |
[INFO] [stdout] 197 | fn test_char() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_char` is never used
[INFO] [stdout]    --> src/main.rs:215:4
[INFO] [stdout]     |
[INFO] [stdout] 215 | 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:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | 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:223:4
[INFO] [stdout]     |
[INFO] [stdout] 223 | fn test_range() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_var` is never used
[INFO] [stdout]    --> src/main.rs:229:4
[INFO] [stdout]     |
[INFO] [stdout] 229 | fn test_var() {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_shadowing` is never used
[INFO] [stdout]    --> src/main.rs:236:4
[INFO] [stdout]     |
[INFO] [stdout] 236 | fn test_shadowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Struct` is never constructed
[INFO] [stdout]    --> src/main.rs:247:8
[INFO] [stdout]     |
[INFO] [stdout] 247 | 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(String),
[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(u8),
[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(u8),
[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: trait `Summary` is never used
[INFO] [stdout]  --> src/test_trait.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Summary {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]  --> src/test_trait.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct Post {
[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: struct `Twitter` is never constructed
[INFO] [stdout]   --> src/test_trait.rs:32:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub struct Twitter {
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `Command { std: "docker" "inspect" "bf82534703bf86c957f9a30bc7f36ffc093c29ecb4c62ae8acae204df0b607bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf82534703bf86c957f9a30bc7f36ffc093c29ecb4c62ae8acae204df0b607bc", kill_on_drop: false }`
[INFO] [stdout] bf82534703bf86c957f9a30bc7f36ffc093c29ecb4c62ae8acae204df0b607bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6ad68c81d199a63004879d8983dd3b1d971200029dabfec64399a6dbf09cfc0e
[INFO] running `Command { std: "docker" "start" "-a" "6ad68c81d199a63004879d8983dd3b1d971200029dabfec64399a6dbf09cfc0e", 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:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     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:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     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:92:10
[INFO] [stderr]    |
[INFO] [stderr] 92 |     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:92:16
[INFO] [stderr]    |
[INFO] [stderr] 92 |     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:96:9
[INFO] [stderr]    |
[INFO] [stderr] 96 |     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:97:9
[INFO] [stderr]    |
[INFO] [stderr] 97 |     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:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |     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:120:19
[INFO] [stderr]     |
[INFO] [stderr] 120 | 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:167:9
[INFO] [stderr]     |
[INFO] [stderr] 167 |     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:168:9
[INFO] [stderr]     |
[INFO] [stderr] 168 |     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:179:9
[INFO] [stderr]     |
[INFO] [stderr] 179 |     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:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |     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:199:9
[INFO] [stderr]     |
[INFO] [stderr] 199 |     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:205:9
[INFO] [stderr]     |
[INFO] [stderr] 205 |     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:237:9
[INFO] [stderr]     |
[INFO] [stderr] 237 |     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:30:19
[INFO] [stderr]    |
[INFO] [stderr] 30 | struct Color(i32, i32, i32);
[INFO] [stderr]    |        -----      ^^^  ^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        fields in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing these fields
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]   --> src/main.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | struct User {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_user` is never used
[INFO] [stderr]   --> src/main.rs:42:4
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn test_user(){
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `build_user` is never used
[INFO] [stderr]   --> src/main.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | 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:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn test_string(){
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_slice` is never used
[INFO] [stderr]   --> src/main.rs:83:4
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn test_slice(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_tuple` is never used
[INFO] [stderr]   --> src/main.rs:90:4
[INFO] [stderr]    |
[INFO] [stderr] 90 | fn test_tuple(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_double_mut_evariable` is never used
[INFO] [stderr]    --> src/main.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn test_double_mut_evariable(){
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_immutable_borrow` is never used
[INFO] [stderr]    --> src/main.rs:114:4
[INFO] [stderr]     |
[INFO] [stderr] 114 | fn test_immutable_borrow() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `change_string` is never used
[INFO] [stderr]    --> src/main.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn change_string (str : &String){
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `change_mut_string` is never used
[INFO] [stderr]    --> src/main.rs:123:4
[INFO] [stderr]     |
[INFO] [stderr] 123 | 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:126:4
[INFO] [stderr]     |
[INFO] [stderr] 126 | fn test_borrowing() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_copy_transfer` is never used
[INFO] [stderr]    --> src/main.rs:134:4
[INFO] [stderr]     |
[INFO] [stderr] 134 | fn test_copy_transfer() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `make_copy` is never used
[INFO] [stderr]    --> src/main.rs:144:4
[INFO] [stderr]     |
[INFO] [stderr] 144 | fn make_copy(x: i32) {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `take_ownership` is never used
[INFO] [stderr]    --> src/main.rs:148:4
[INFO] [stderr]     |
[INFO] [stderr] 148 | fn take_ownership(s: String) {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_clone` is never used
[INFO] [stderr]    --> src/main.rs:152:4
[INFO] [stderr]     |
[INFO] [stderr] 152 | fn test_clone() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `clear` is never used
[INFO] [stderr]    --> src/main.rs:158:4
[INFO] [stderr]     |
[INFO] [stderr] 158 | fn clear(text: &mut String) -> () {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]    --> src/main.rs:162:4
[INFO] [stderr]     |
[INFO] [stderr] 162 | 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:166:4
[INFO] [stderr]     |
[INFO] [stderr] 166 | fn test_type() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_na_n` is never used
[INFO] [stderr]    --> src/main.rs:171:4
[INFO] [stderr]     |
[INFO] [stderr] 171 | fn test_na_n() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_number` is never used
[INFO] [stderr]    --> src/main.rs:178:4
[INFO] [stderr]     |
[INFO] [stderr] 178 | fn test_number() {
[INFO] [stderr]     |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_char` is never used
[INFO] [stderr]    --> src/main.rs:197:4
[INFO] [stderr]     |
[INFO] [stderr] 197 | fn test_char() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_char` is never used
[INFO] [stderr]    --> src/main.rs:215:4
[INFO] [stderr]     |
[INFO] [stderr] 215 | fn print_char(c: char) {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `type_of` is never used
[INFO] [stderr]    --> src/main.rs:219:4
[INFO] [stderr]     |
[INFO] [stderr] 219 | fn type_of<T>(_: &T) -> String {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_range` is never used
[INFO] [stderr]    --> src/main.rs:223:4
[INFO] [stderr]     |
[INFO] [stderr] 223 | fn test_range() {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_var` is never used
[INFO] [stderr]    --> src/main.rs:229:4
[INFO] [stderr]     |
[INFO] [stderr] 229 | fn test_var() {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_shadowing` is never used
[INFO] [stderr]    --> src/main.rs:236:4
[INFO] [stderr]     |
[INFO] [stderr] 236 | fn test_shadowing() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Struct` is never constructed
[INFO] [stderr]    --> src/main.rs:247:8
[INFO] [stderr]     |
[INFO] [stderr] 247 | 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(String),
[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(u8),
[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(u8),
[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: trait `Summary` is never used
[INFO] [stderr]  --> src/test_trait.rs:5:11
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub trait Summary {
[INFO] [stderr]   |           ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Post` is never constructed
[INFO] [stderr]  --> src/test_trait.rs:9:12
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] running 15 tests
[INFO] [stderr] 9 | pub struct Post {
[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: struct `Twitter` is never constructed
[INFO] [stderr]   --> src/test_trait.rs:32:12
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub struct Twitter {
[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 81 warnings (run `cargo fix --bin "rust_demo" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_demo-79044cac37495b05)
[INFO] [stdout] test array_test::array_test ... ok
[INFO] [stdout] test enum_test::enum_test ... ok
[INFO] [stdout] test flow_test::flow ... ok
[INFO] [stdout] test lifecrycle::test ... ok
[INFO] [stdout] test test_trait::test_point ... ok
[INFO] [stdout] test test_trait::test_sheep ... ok
[INFO] [stdout] test test_method::method_impl ... ok
[INFO] [stdout] test flow_test::test_multi_math ... ok
[INFO] [stdout] test test_trait_object::test_screen ... ok
[INFO] [stdout] test test_map::test_map ... ok
[INFO] [stdout] test test_vector::test_vector ... ok
[INFO] [stdout] test test_trait::test_notify ... ok
[INFO] [stdout] test test_generics::test_generics ... ok
[INFO] [stdout] test flow_test::test_match ... 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] 
[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:     0x63df81ad17e2 - std::backtrace_rs::backtrace::libunwind::trace::h73a647620bf1c49d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x63df81ad17e2 - std::backtrace_rs::backtrace::trace_unsynchronized::hd4d513ed96cb3cb1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x63df81ad17e2 - std::sys::backtrace::_print_fmt::h61bb95f7476aafa5
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x63df81ad17e2 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha2e7e3a01df69042
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x63df81af68a3 - core::fmt::rt::Argument::fmt::hf14163372f0f9a76
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x63df81af68a3 - core::fmt::write::h7cb8f63788cd01d2
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/mod.rs:1465:25
[INFO] [stdout]    6:     0x63df81ace773 - std::io::default_write_fmt::h9ed739ccee8a150c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x63df81ace773 - std::io::Write::write_fmt::h1c0a32da913b32f1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x63df81ad1632 - std::sys::backtrace::BacktraceLock::print::h3ec4d7883eb25e61
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x63df81ad2d4c - std::panicking::default_hook::{{closure}}::h29548987efd832cb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x63df81ad2ba2 - std::panicking::default_hook::ha25170a15c643514
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x63df81a9acc4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h562adeecbf43c420
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x63df81a9acc4 - test::test_main_with_exit_callback::{{closure}}::h97dd2a879d27e0e4
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x63df81ad372b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7e85cbdbda26fdb7
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x63df81ad372b - std::panicking::rust_panic_with_hook::h0d81afcd829aa24b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x63df81ad34c6 - std::panicking::begin_panic_handler::{{closure}}::hc84a33f1202346cf
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:699:13
[INFO] [stdout]   16:     0x63df81ad1cd9 - std::sys::backtrace::__rust_end_short_backtrace::h373067a14f6c59aa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x63df81ad318d - __rustc[beb0385846a06d21]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x63df81af5420 - core::panicking::panic_fmt::ha33fa2ae772efba9
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x63df81a5eb0c - rust_demo::test_error::test_error::hf01c54be7f46193b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test_error.rs:3:5
[INFO] [stdout]   20:     0x63df81a5eb0c - rust_demo::test_error::test_error::{{closure}}::h3798622e87f41816
[INFO] [stdout]                                at /opt/rustwide/workdir/src/test_error.rs:2:16
[INFO] [stdout]   21:     0x63df81a5eb0c - core::ops::function::FnOnce::call_once::h704e2c289c34b120
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   22:     0x63df81aa03fb - core::ops::function::FnOnce::call_once::hf84b9c3d864a6959
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   23:     0x63df81aa03fb - test::__rust_begin_short_backtrace::h5724e31441c16fcb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:648:18
[INFO] [stdout]   24:     0x63df81a9f63e - test::run_test_in_process::{{closure}}::hbc28c9aa91793d7d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:74
[INFO] [stdout]   25:     0x63df81a9f63e - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc17b0e238c0f8f3e
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   26:     0x63df81a9f63e - std::panicking::catch_unwind::do_call::hcdbce0d6dd6c83ce
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   27:     0x63df81a9f63e - std::panicking::catch_unwind::h9477967ceea044e8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   28:     0x63df81a9f63e - std::panic::catch_unwind::h616a2e249da12e16
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   29:     0x63df81a9f63e - test::run_test_in_process::h2758deb0f2e54430
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:27
[INFO] [stderr] error: test failed, to rerun pass `--bin rust_demo`
[INFO] [stdout]   30:     0x63df81a9f63e - test::run_test::{{closure}}::habe5cd2564b18aaa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:592:43
[INFO] [stdout]   31:     0x63df81a631e4 - test::run_test::{{closure}}::h9a0a6928f1a15421
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:622:41
[INFO] [stdout]   32:     0x63df81a631e4 - std::sys::backtrace::__rust_begin_short_backtrace::hd68b5332434a22ca
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   33:     0x63df81a66b8a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h264ddcc3098eacae
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   34:     0x63df81a66b8a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9fa39489749d6f3c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   35:     0x63df81a66b8a - std::panicking::catch_unwind::do_call::hb9a1944b9f85100f
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   36:     0x63df81a66b8a - std::panicking::catch_unwind::h0c6f100786c0dad8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   37:     0x63df81a66b8a - std::panic::catch_unwind::hf6084e2723385823
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   38:     0x63df81a66b8a - std::thread::Builder::spawn_unchecked_::{{closure}}::hf0af58ce658143ad
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   39:     0x63df81a66b8a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h88a14f9b2e79f9de
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   40:     0x63df81ad6687 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf31256ba38644b65
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   41:     0x63df81ad6687 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h100ad77f3448041b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   42:     0x63df81ad6687 - std::sys::pal::unix::thread::Thread::new::thread_start::h1a22ded422ce395b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   43:     0x7ec995cb3aa4 - <unknown>
[INFO] [stdout]   44:     0x7ec995d40a34 - 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. 14 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6ad68c81d199a63004879d8983dd3b1d971200029dabfec64399a6dbf09cfc0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ad68c81d199a63004879d8983dd3b1d971200029dabfec64399a6dbf09cfc0e", kill_on_drop: false }`
[INFO] [stdout] 6ad68c81d199a63004879d8983dd3b1d971200029dabfec64399a6dbf09cfc0e
