[INFO] cloning repository https://github.com/iam-joey/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iam-joey/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiam-joey%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiam-joey%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23b540d761887e49be0df1d75a9efde5826d507f
[INFO] checking iam-joey/rust-learning against master#17ffbc81a30c094193836a5d7f90dff273b5df93 for pr-138785
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fiam-joey%2Frust-learning" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iam-joey/rust-learning on toolchain 17ffbc81a30c094193836a5d7f90dff273b5df93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iam-joey/rust-learning
[INFO] finished tweaking git repo https://github.com/iam-joey/rust-learning
[INFO] tweaked toml for git repo https://github.com/iam-joey/rust-learning written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/iam-joey/rust-learning 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" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e1e18cf9a61a86eee7b1505ebda9a09179d313f0d5d7c5a679b1286ab07637e
[INFO] running `Command { std: "docker" "start" "-a" "6e1e18cf9a61a86eee7b1505ebda9a09179d313f0d5d7c5a679b1286ab07637e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e1e18cf9a61a86eee7b1505ebda9a09179d313f0d5d7c5a679b1286ab07637e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e1e18cf9a61a86eee7b1505ebda9a09179d313f0d5d7c5a679b1286ab07637e", kill_on_drop: false }`
[INFO] [stdout] 6e1e18cf9a61a86eee7b1505ebda9a09179d313f0d5d7c5a679b1286ab07637e
[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" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+17ffbc81a30c094193836a5d7f90dff273b5df93" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe45952362f8052169b2f90a86527265809790cadae23261f66cd8d38abb51ac
[INFO] running `Command { std: "docker" "start" "-a" "fe45952362f8052169b2f90a86527265809790cadae23261f66cd8d38abb51ac", kill_on_drop: false }`
[INFO] [stderr]     Checking rustify v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `iterators::dsa`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use iterators::dsa;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `thread::sleep` and `time::Duration`
[INFO] [stdout]  --> src/main.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{thread::sleep, time::Duration};
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `traits::Sounds`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use traits::Sounds;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::format`
[INFO] [stdout]  --> src/files.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::format, fs, path};
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type parameter `petType` should have an upper camel case name
[INFO] [stdout]  --> src/traits.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Person<petType>
[INFO] [stdout]   |                   ^^^^^^^ help: convert the identifier to upper camel case: `PetType`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `iterators::dsa`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use iterators::dsa;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `thread::sleep` and `time::Duration`
[INFO] [stdout]  --> src/main.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{thread::sleep, time::Duration};
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `traits::Sounds`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use traits::Sounds;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::format`
[INFO] [stdout]  --> src/files.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::format, fs, path};
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type parameter `petType` should have an upper camel case name
[INFO] [stdout]  --> src/traits.rs:1:19
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Person<petType>
[INFO] [stdout]   |                   ^^^^^^^ help: convert the identifier to upper camel case: `PetType`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/dsa.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     for i in a.chars().enumerate() {}
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/files.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let a = fs::create_dir("joey");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]   --> src/files.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let file = fs::File::create(path);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/dsa.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     for i in a.chars().enumerate() {}
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fruit`
[INFO] [stdout]   --> src/iterators.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let fruit = fruits.iter();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_fruit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/files.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let a = fs::create_dir("joey");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]   --> src/files.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let file = fs::File::create(path);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fruit`
[INFO] [stdout]   --> src/iterators.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let fruit = fruits.iter();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_fruit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/thread.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let a = spawn(thread_busy);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/thread.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let a = spawn(thread_busy);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is more private than the item `Person`
[INFO] [stdout]   --> src/traits.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | pub struct Person<petType>
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ struct `Person` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Animal` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/traits.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Animal {}
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Friendly` is more private than the item `Person`
[INFO] [stdout]   --> src/traits.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | pub struct Person<petType>
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ struct `Person` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Friendly` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/traits.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Friendly {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure` is never used
[INFO] [stdout]  --> src/closure.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn closure() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]  --> src/dsa.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn plus_one(mut digits: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `single_number` is never used
[INFO] [stdout]   --> src/dsa.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn single_number(nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string` is never used
[INFO] [stdout]   --> src/dsa.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn string(s: &String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_create_dir` is never used
[INFO] [stdout]  --> src/files.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_create_dir() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_create` is never used
[INFO] [stdout]   --> src/files.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn file_create() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_to_file` is never used
[INFO] [stdout]   --> src/files.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn write_to_file() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `delete_file` is never used
[INFO] [stdout]   --> src/files.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn delete_file() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]  --> src/helper.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn say_hello() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_iterators` is never used
[INFO] [stdout]  --> src/iterators.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_iterators() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dsa` is never used
[INFO] [stdout]   --> src/iterators.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn dsa() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_mutex` is never used
[INFO] [stdout]  --> src/mutex.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn test_mutex() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_thread` is never used
[INFO] [stdout]  --> src/mympsc.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn test_thread() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scope_thread_spawn` is never used
[INFO] [stdout]  --> src/scopethreads.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn scope_thread_spawn() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `thread_spawn` is never used
[INFO] [stdout]  --> src/thread.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn thread_spawn() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/traits.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Person<petType>
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]   --> src/traits.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Animal {}
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Friendly` is never used
[INFO] [stdout]   --> src/traits.rs:29:7
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Friendly {}
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sound` is never used
[INFO] [stdout]   --> src/traits.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait Sounds {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] 36 |     fn sound(&self) {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mympsc.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         sender.send(i + 1);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let _ = sender.send(i + 1);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mympsc.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     t1.join();
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = t1.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scopethreads.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         scope.spawn(closure).join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let _ = scope.spawn(closure).join();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scopethreads.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         scope.spawn(closure).join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let _ = scope.spawn(closure).join();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scopethreads.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         scope.spawn(closure).join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let _ = scope.spawn(closure).join();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is more private than the item `Person`
[INFO] [stdout]   --> src/traits.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | pub struct Person<petType>
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ struct `Person` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Animal` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/traits.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Animal {}
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Friendly` is more private than the item `Person`
[INFO] [stdout]   --> src/traits.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | pub struct Person<petType>
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ struct `Person` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Friendly` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/traits.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Friendly {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure` is never used
[INFO] [stdout]  --> src/closure.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn closure() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]  --> src/dsa.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn plus_one(mut digits: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `single_number` is never used
[INFO] [stdout]   --> src/dsa.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn single_number(nums: Vec<i32>) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `string` is never used
[INFO] [stdout]   --> src/dsa.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn string(s: &String) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_create_dir` is never used
[INFO] [stdout]  --> src/files.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_create_dir() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_create` is never used
[INFO] [stdout]   --> src/files.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn file_create() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_to_file` is never used
[INFO] [stdout]   --> src/files.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn write_to_file() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `delete_file` is never used
[INFO] [stdout]   --> src/files.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn delete_file() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `say_hello` is never used
[INFO] [stdout]  --> src/helper.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn say_hello() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_iterators` is never used
[INFO] [stdout]  --> src/iterators.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn test_iterators() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dsa` is never used
[INFO] [stdout]   --> src/iterators.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn dsa() {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_mutex` is never used
[INFO] [stdout]  --> src/mutex.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn test_mutex() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_thread` is never used
[INFO] [stdout]  --> src/mympsc.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn test_thread() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `scope_thread_spawn` is never used
[INFO] [stdout]  --> src/scopethreads.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn scope_thread_spawn() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `thread_spawn` is never used
[INFO] [stdout]  --> src/thread.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn thread_spawn() {
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]  --> src/traits.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Person<petType>
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]   --> src/traits.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Animal {}
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Friendly` is never used
[INFO] [stdout]   --> src/traits.rs:29:7
[INFO] [stdout]    |
[INFO] [stdout] 29 | trait Friendly {}
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sound` is never used
[INFO] [stdout]   --> src/traits.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait Sounds {
[INFO] [stdout]    |           ------ method in this trait
[INFO] [stdout] 36 |     fn sound(&self) {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mympsc.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         sender.send(i + 1);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |         let _ = sender.send(i + 1);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/mympsc.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     t1.join();
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = t1.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scopethreads.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |         scope.spawn(closure).join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let _ = scope.spawn(closure).join();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scopethreads.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         scope.spawn(closure).join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 15 |         let _ = scope.spawn(closure).join();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/scopethreads.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         scope.spawn(closure).join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let _ = scope.spawn(closure).join();
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "fe45952362f8052169b2f90a86527265809790cadae23261f66cd8d38abb51ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe45952362f8052169b2f90a86527265809790cadae23261f66cd8d38abb51ac", kill_on_drop: false }`
[INFO] [stdout] fe45952362f8052169b2f90a86527265809790cadae23261f66cd8d38abb51ac