[INFO] cloning repository https://github.com/Ashutoshpython123/Rust-concepts
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ashutoshpython123/Rust-concepts" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAshutoshpython123%2FRust-concepts", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAshutoshpython123%2FRust-concepts'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 43ded94b81394c372cae76721687b93c9ade5583
[INFO] checking Ashutoshpython123/Rust-concepts against master#8f21a5c92ea55c348c275a1bc4fedbdf181e0d64 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAshutoshpython123%2FRust-concepts" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ashutoshpython123/Rust-concepts
[INFO] finished tweaking git repo https://github.com/Ashutoshpython123/Rust-concepts
[INFO] tweaked toml for git repo https://github.com/Ashutoshpython123/Rust-concepts written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ashutoshpython123/Rust-concepts on toolchain 8f21a5c92ea55c348c275a1bc4fedbdf181e0d64
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ashutoshpython123/Rust-concepts 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" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49b0f02c6d178fbc7a3763c31d87215c43b2accc6d185afb2cb39f47144890cb
[INFO] running `Command { std: "docker" "start" "-a" "49b0f02c6d178fbc7a3763c31d87215c43b2accc6d185afb2cb39f47144890cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49b0f02c6d178fbc7a3763c31d87215c43b2accc6d185afb2cb39f47144890cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49b0f02c6d178fbc7a3763c31d87215c43b2accc6d185afb2cb39f47144890cb", kill_on_drop: false }`
[INFO] [stdout] 49b0f02c6d178fbc7a3763c31d87215c43b2accc6d185afb2cb39f47144890cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8f21a5c92ea55c348c275a1bc4fedbdf181e0d64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57250e03b60eeb7fd48339540e5ebe9e2c5120281e9632dbe8cac5fedd340354
[INFO] running `Command { std: "docker" "start" "-a" "57250e03b60eeb7fd48339540e5ebe9e2c5120281e9632dbe8cac5fedd340354", kill_on_drop: false }`
[INFO] [stderr]     Checking rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `doe_score`
[INFO] [stdout]   --> src/collection.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let doe_score = score.insert(String::from("Doe"), 20);
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_doe_score`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/collection.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut numbers = vec![1,2,3,4];
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/collection.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut sencond_string = "Maurya".to_string();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `data_type` is never used
[INFO] [stdout]  --> src/datatype.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn data_type(){
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variable` is never used
[INFO] [stdout]  --> src/variables.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn variable() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string` is never used
[INFO] [stdout]  --> src/string.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn string(){
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loops` is never used
[INFO] [stdout]  --> src/iteration.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn loops(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_` is never used
[INFO] [stdout]  --> src/tuples_.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn tuple_(){
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array` is never used
[INFO] [stdout]  --> src/array.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn array(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main_fn` is never used
[INFO] [stdout]  --> src/function.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main_fn(){
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_number` is never used
[INFO] [stdout]  --> src/function.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn add_number(x:i32, y:i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enum_` is never used
[INFO] [stdout]  --> src/enum_.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn enum_(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enum_.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/enum_.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Message {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 23 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_message` is never used
[INFO] [stdout]   --> src/enum_.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn process_message(msg:Message){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_result` is never used
[INFO] [stdout]  --> src/option_result.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn option_result() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cal_square_root` is never used
[INFO] [stdout]   --> src/option_result.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn cal_square_root(number: f64) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `divide` is never used
[INFO] [stdout]   --> src/option_result.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn divide(a:f64, b:f64) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_from_arr` is never used
[INFO] [stdout]   --> src/option_result.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn get_from_arr(key: String) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cal_triangle_area` is never used
[INFO] [stdout]   --> src/option_result.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn cal_triangle_area(base : Option<f64>, height : Option<f64>) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `collection` is never used
[INFO] [stdout]  --> src/collection.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn collection() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `traits` is never used
[INFO] [stdout]  --> src/traits.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn traits() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Speak` is never used
[INFO] [stdout]   --> src/traits.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | trait Speak {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]   --> src/traits.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Dog{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cow` is never constructed
[INFO] [stdout]   --> src/traits.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Cow {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Display` is never used
[INFO] [stdout]   --> src/traits.rs:45:7
[INFO] [stdout]    |
[INFO] [stdout] 45 | trait Display {
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `animal_speak` is never used
[INFO] [stdout]   --> src/traits.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn animal_speak<T: Speak>(animal: &T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `doe_score`
[INFO] [stdout]   --> src/collection.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let doe_score = score.insert(String::from("Doe"), 20);
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_doe_score`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/collection.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut numbers = vec![1,2,3,4];
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/collection.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mut sencond_string = "Maurya".to_string();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `data_type` is never used
[INFO] [stdout]  --> src/datatype.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn data_type(){
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `variable` is never used
[INFO] [stdout]  --> src/variables.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn variable() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string` is never used
[INFO] [stdout]  --> src/string.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn string(){
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loops` is never used
[INFO] [stdout]  --> src/iteration.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn loops(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tuple_` is never used
[INFO] [stdout]  --> src/tuples_.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn tuple_(){
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array` is never used
[INFO] [stdout]  --> src/array.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn array(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main_fn` is never used
[INFO] [stdout]  --> src/function.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn main_fn(){
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_number` is never used
[INFO] [stdout]  --> src/function.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn add_number(x:i32, y:i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enum_` is never used
[INFO] [stdout]  --> src/enum_.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn enum_(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/enum_.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/enum_.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Message {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 23 |     fn call(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_message` is never used
[INFO] [stdout]   --> src/enum_.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn process_message(msg:Message){
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `option_result` is never used
[INFO] [stdout]  --> src/option_result.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn option_result() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cal_square_root` is never used
[INFO] [stdout]   --> src/option_result.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn cal_square_root(number: f64) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `divide` is never used
[INFO] [stdout]   --> src/option_result.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn divide(a:f64, b:f64) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_from_arr` is never used
[INFO] [stdout]   --> src/option_result.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn get_from_arr(key: String) -> Option<f64> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cal_triangle_area` is never used
[INFO] [stdout]   --> src/option_result.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn cal_triangle_area(base : Option<f64>, height : Option<f64>) -> Result<f64, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `collection` is never used
[INFO] [stdout]  --> src/collection.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn collection() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `traits` is never used
[INFO] [stdout]  --> src/traits.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn traits() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Speak` is never used
[INFO] [stdout]   --> src/traits.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | trait Speak {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]   --> src/traits.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Dog{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cow` is never constructed
[INFO] [stdout]   --> src/traits.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | struct Cow {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Display` is never used
[INFO] [stdout]   --> src/traits.rs:45:7
[INFO] [stdout]    |
[INFO] [stdout] 45 | trait Display {
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `animal_speak` is never used
[INFO] [stdout]   --> src/traits.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn animal_speak<T: Speak>(animal: &T) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "57250e03b60eeb7fd48339540e5ebe9e2c5120281e9632dbe8cac5fedd340354", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57250e03b60eeb7fd48339540e5ebe9e2c5120281e9632dbe8cac5fedd340354", kill_on_drop: false }`
[INFO] [stdout] 57250e03b60eeb7fd48339540e5ebe9e2c5120281e9632dbe8cac5fedd340354
