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[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kotamat/rust_tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotamat%2Frust_tutorial", kill_on_drop: false }`
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[INFO] checking kotamat/rust_tutorial against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotamat%2Frust_tutorial" "/workspace/builds/worker-83/source", kill_on_drop: false }`
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[INFO] validating manifest of git repo https://github.com/kotamat/rust_tutorial on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
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[INFO] finished tweaking git repo https://github.com/kotamat/rust_tutorial
[INFO] tweaked toml for git repo https://github.com/kotamat/rust_tutorial written to /workspace/builds/worker-83/source/Cargo.toml
[INFO] crate git repo https://github.com/kotamat/rust_tutorial already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "f1ee8ab509f9bedf70d30b6641e60db318f6bddee36318ab453db11d3f246010", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking tests v0.1.0 (/tmp/fixit/tests)
[INFO] [stderr]     Checking restaurant v0.1.0 (/tmp/fixit/restaurant)
[INFO] [stderr]     Checking function v0.1.0 (/tmp/fixit/function)
[INFO] [stderr]     Checking rust_tutorial v0.1.0 (/tmp/fixit)
[INFO] [stderr]     Checking smart_pointer v0.1.0 (/tmp/fixit/smart_pointer)
[INFO] [stderr]     Checking pattern_match v0.1.0 (/tmp/fixit/pattern_match)
[INFO] [stderr]     Checking generics v0.1.0 (/tmp/fixit/generics)
[INFO] [stderr]     Checking structs v0.1.0 (/tmp/fixit/structs)
[INFO] [stderr]     Checking oop v0.1.0 (/tmp/fixit/oop)
[INFO] [stderr]     Checking functional_features v0.1.0 (/tmp/fixit/functional_features)
[INFO] [stderr]     Checking ownership v0.1.0 (/tmp/fixit/ownership)
[INFO] [stderr]     Checking advanced_trait v0.1.0 (/tmp/fixit/advanced_trait)
[INFO] [stderr]     Checking enums v0.1.0 (/tmp/fixit/enums)
[INFO] [stderr]     Checking concurrency v0.1.0 (/tmp/fixit/concurrency)
[INFO] [stderr]     Checking collections v0.1.0 (/tmp/fixit/collections)
[INFO] [stderr]     Checking advanced_functions v0.1.0 (/tmp/fixit/advanced_functions)
[INFO] [stderr]     Checking variable v0.1.0 (/tmp/fixit/variable)
[INFO] [stderr]     Checking unsafe_rust v0.1.0 (/tmp/fixit/unsafe_rust)
[INFO] [stderr]     Checking errors v0.1.0 (/tmp/fixit/errors)
[INFO] [stderr]     Checking macros v0.1.0 (/tmp/fixit/macros)
[INFO] [stderr]    Migrating tests/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating restaurant/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating function/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating smart_pointer/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating pattern_match/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating generics/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating structs/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating functional_features/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating oop/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ownership/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating advanced_trait/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating enums/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking guessing_game v0.1.0 (/tmp/fixit/guessing_game)
[INFO] [stderr]    Migrating tests/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating guessing_game/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating advanced_functions/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating concurrency/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating collections/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating errors/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating variable/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating unsafe_rust/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating macros/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed restaurant/src/lib.rs (2 fixes)
[INFO] [stderr]        Fixed tests/src/lib.rs (1 fix)
[INFO] [stdout] warning: function is never used: `serve_order`
[INFO] [stdout]  --> restaurant/src/lib.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn serve_order() {}
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fix_incorrect_order`
[INFO] [stdout]   --> restaurant/src/lib.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn fix_incorrect_order() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cook_order`
[INFO] [stdout]   --> restaurant/src/lib.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn cook_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `seasonal_fruit`
[INFO] [stdout]   --> restaurant/src/lib.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         seasonal_fruit: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Migrating restaurant/src/main.rs from 2018 edition to 2021
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]  --> tests/src/test_organization.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `internal_adder`
[INFO] [stdout]  --> tests/src/test_organization.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn internal_adder(a: i32, b: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> tests/src/lib.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> tests/src/lib.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     value: i32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Migrating tests/tests/integration_test.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed smart_pointer/src/interior_mutability.rs (2 fixes)
[INFO] [stderr]        Fixed smart_pointer/src/rc_.rs (2 fixes)
[INFO] [stderr]        Fixed smart_pointer/src/drop_.rs (1 fix)
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |     Quit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     Move { x: i32, y: i32 },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     Write(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     Rgb(i32, i32, i32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> pattern_match/src/pattern.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> pattern_match/src/pattern.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> pattern_match/src/pattern.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> smart_pointer/src/reference_cycle.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LimitTracker`
[INFO] [stdout]   --> smart_pointer/src/interior_mutability.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct LimitTracker<'a, T: Messenger> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> smart_pointer/src/interior_mutability.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub fn new(messenger: &'a T, max: usize) -> LimitTracker<'a, T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_value`
[INFO] [stdout]   --> smart_pointer/src/interior_mutability.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cons`
[INFO] [stdout]   --> smart_pointer/src/interior_mutability.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     Cons(Rc<RefCell<i32>>, Rc<ListMutable>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]   --> smart_pointer/src/interior_mutability.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed generics/src/traits.rs (2 fixes)
[INFO] [stderr]        Fixed generics/src/lifetime.rs (2 fixes)
[INFO] [stderr]        Fixed structs/src/main.rs (3 fixes)
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> generics/src/lifetime.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn first_word(s: &str) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `level`
[INFO] [stdout]    --> generics/src/lifetime.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn level(&self) -> i32 {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `announce_and_return_part`
[INFO] [stdout]    --> generics/src/lifetime.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_with_an_announcement`
[INFO] [stdout]    --> generics/src/lifetime.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify2`
[INFO] [stdout]   --> generics/src/traits.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn notify2<T: Summary>(item: &T) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function`
[INFO] [stdout]   --> generics/src/traits.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn some_function<T, U>(_t: &T, _u: &U)
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sign_in_count`
[INFO] [stdout]  --> structs/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `active`
[INFO] [stdout]  --> structs/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     active: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed functional_features/src/main.rs (3 fixes)
[INFO] [stdout] error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> ownership/src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let word = first_word(&s);
[INFO] [stdout]    |                           -- immutable borrow occurs here
[INFO] [stdout] 24 |     s.clear();
[INFO] [stdout]    |     ^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 25 |     println!("the first word is: {}", word);
[INFO] [stdout]    |                                       ---- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ownership` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr]        Fixed oop/src/oo_design_patterns.rs (2 fixes)
[INFO] [stdout] warning: associated function is never used: `reject`
[INFO] [stdout]   --> oop/src/oo_design_patterns.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn reject(&mut self) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen2`
[INFO] [stdout]   --> oop/src/trait_object.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct Screen2<T: Draw> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> oop/src/trait_object.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn run(&self) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]   --> oop/src/trait_object.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     width: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> oop/src/trait_object.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `options`
[INFO] [stdout]   --> oop/src/trait_object.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     options: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `iterator`
[INFO] [stdout]  --> functional_features/src/iterators.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn iterator() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_workout`
[INFO] [stdout]   --> functional_features/src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_workout_with_closure`
[INFO] [stdout]   --> functional_features/src/main.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn generate_workout_with_closure(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stdout]   --> functional_features/src/main.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_workout_with_struct`
[INFO] [stdout]    --> functional_features/src/main.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn generate_workout_with_struct(inversity: u32, random_number: u32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> functional_features/src/improve_io.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     run(config);
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Map` that must be used
[INFO] [stdout]  --> functional_features/src/iterators.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     v1.iter().map(|x| x + 1);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed advanced_trait/src/main.rs (3 fixes)
[INFO] [stdout] warning: function is never used: `serve_order`
[INFO] [stdout]  --> restaurant/src/lib.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn serve_order() {}
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fix_incorrect_order`
[INFO] [stdout]   --> restaurant/src/lib.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn fix_incorrect_order() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cook_order`
[INFO] [stdout]   --> restaurant/src/lib.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn cook_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `seasonal_fruit`
[INFO] [stdout]   --> restaurant/src/lib.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         seasonal_fruit: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `sized_type`
[INFO] [stdout]    --> advanced_trait/src/main.rs:130:4
[INFO] [stdout]     |
[INFO] [stdout] 130 | fn sized_type() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed enums/src/matches.rs (2 fixes)
[INFO] [stderr]        Fixed enums/src/main.rs (4 fixes)
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]  --> enums/src/matches.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Alaska,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]  --> enums/src/matches.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Penny,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]  --> enums/src/matches.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Nickel,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]   --> enums/src/matches.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]  --> enums/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     V6,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind`
[INFO] [stdout]   --> enums/src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     kind: IpAddrKind,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address`
[INFO] [stdout]   --> enums/src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     address: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]   --> enums/src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 90 |     Quit,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     Move { x: i32, y: i32 },
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     Write(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]   --> pattern_match/src/pattern.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     Rgb(i32, i32, i32),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> pattern_match/src/pattern.rs:100:5
[INFO] [stdout]     |
[INFO] [stdout] 100 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> pattern_match/src/pattern.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> pattern_match/src/pattern.rs:102:5
[INFO] [stdout]     |
[INFO] [stdout] 102 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> smart_pointer/src/reference_cycle.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cons`
[INFO] [stdout]   --> smart_pointer/src/interior_mutability.rs:91:5
[INFO] [stdout]    |
[INFO] [stdout] 91 |     Cons(Rc<RefCell<i32>>, Rc<ListMutable>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]   --> smart_pointer/src/interior_mutability.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed advanced_functions/src/main.rs (1 fix)
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Stop`
[INFO] [stdout]   --> advanced_functions/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Stop,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure`
[INFO] [stdout]   --> advanced_functions/src/main.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed collections/src/strings.rs (1 fix)
[INFO] [stderr]        Fixed collections/src/main.rs (1 fix)
[INFO] [stderr]        Fixed collections/src/hashmap.rs (1 fix)
[INFO] [stdout] warning: function is never used: `sized_type`
[INFO] [stdout]    --> advanced_trait/src/main.rs:130:4
[INFO] [stdout]     |
[INFO] [stdout] 130 | fn sized_type() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `hash` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> collections/src/hashmap.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         if let Some(value) = hash.get(i) {
[INFO] [stdout]    |                              ---- immutable borrow occurs here
[INFO] [stdout] 48 |             hash.insert(*i, value + 1);
[INFO] [stdout]    |             ^^^^            ----- immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed errors/src/main.rs (6 fixes)
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> errors/src/main.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file2`
[INFO] [stdout]   --> errors/src/main.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn read_username_from_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file3`
[INFO] [stdout]   --> errors/src/main.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn read_username_from_file3() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `backtrace`
[INFO] [stdout]   --> errors/src/main.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn backtrace() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_read_or_create`
[INFO] [stdout]   --> errors/src/main.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn file_read_or_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_read_or_create_closure`
[INFO] [stdout]   --> errors/src/main.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn file_read_or_create_closure() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_read_unwrap`
[INFO] [stdout]   --> errors/src/main.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn file_read_unwrap() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed concurrency/src/shared_state.rs (1 fix)
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed concurrency/src/main.rs (1 fix)
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> concurrency/src/message_passing.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) fn main() {
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `normal_messaging`
[INFO] [stdout]   --> concurrency/src/message_passing.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn normal_messaging() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multi_producing`
[INFO] [stdout]   --> concurrency/src/message_passing.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn multi_producing() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `move_in_spawn_thread`
[INFO] [stdout]   --> concurrency/src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn move_in_spawn_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `handle_spawn_thread`
[INFO] [stdout]   --> concurrency/src/main.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn handle_spawn_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Screen2`
[INFO] [stdout]   --> oop/src/trait_object.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct Screen2<T: Draw> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> oop/src/trait_object.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 |     pub fn run(&self) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]   --> oop/src/trait_object.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     width: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> oop/src/trait_object.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 68 |     height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `options`
[INFO] [stdout]   --> oop/src/trait_object.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     options: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]  --> enums/src/matches.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Alaska,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]  --> enums/src/matches.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Penny,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]  --> enums/src/matches.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Nickel,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]   --> enums/src/matches.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]  --> enums/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     V6,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `kind`
[INFO] [stdout]   --> enums/src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     kind: IpAddrKind,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `address`
[INFO] [stdout]   --> enums/src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     address: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]   --> enums/src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sign_in_count`
[INFO] [stdout]  --> structs/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `active`
[INFO] [stdout]  --> structs/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     active: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `iterator`
[INFO] [stdout]  --> functional_features/src/iterators.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn iterator() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `shoes_in_size`
[INFO] [stdout]   --> functional_features/src/iterators.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn shoes_in_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> functional_features/src/iterators.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_workout`
[INFO] [stdout]   --> functional_features/src/main.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn generate_workout(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_workout_with_closure`
[INFO] [stdout]   --> functional_features/src/main.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn generate_workout_with_closure(intensity: u32, random_number: u32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `simulated_expensive_calculation`
[INFO] [stdout]   --> functional_features/src/main.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn simulated_expensive_calculation(intensity: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Cacher`
[INFO] [stdout]   --> functional_features/src/main.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | struct Cacher<T, U>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> functional_features/src/main.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 |     fn new(calculation: T) -> Cacher<T, U> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value`
[INFO] [stdout]   --> functional_features/src/main.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     fn value(&mut self, arg: U) -> U {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `generate_workout_with_struct`
[INFO] [stdout]    --> functional_features/src/main.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn generate_workout_with_struct(inversity: u32, random_number: u32) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> functional_features/src/improve_io.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     run(config);
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Map` that must be used
[INFO] [stdout]  --> functional_features/src/iterators.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     v1.iter().map(|x| x + 1);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: iterators are lazy and do nothing unless consumed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]   --> generics/src/lifetime.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn first_word(s: &str) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `level`
[INFO] [stdout]    --> generics/src/lifetime.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn level(&self) -> i32 {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `announce_and_return_part`
[INFO] [stdout]    --> generics/src/lifetime.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn announce_and_return_part(&self, announcement: &str) -> &str {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `longest_with_an_announcement`
[INFO] [stdout]    --> generics/src/lifetime.rs:129:4
[INFO] [stdout]     |
[INFO] [stdout] 129 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `notify2`
[INFO] [stdout]   --> generics/src/traits.rs:69:4
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn notify2<T: Summary>(item: &T) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `some_function`
[INFO] [stdout]   --> generics/src/traits.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn some_function<T, U>(_t: &T, _u: &U)
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `hash` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> collections/src/hashmap.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         if let Some(value) = hash.get(i) {
[INFO] [stdout]    |                              ---- immutable borrow occurs here
[INFO] [stdout] 48 |             hash.insert(*i, value + 1);
[INFO] [stdout]    |             ^^^^            ----- immutable borrow later used here
[INFO] [stdout]    |             |
[INFO] [stdout]    |             mutable borrow occurs here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Stop`
[INFO] [stdout]   --> advanced_functions/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Stop,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returns_closure`
[INFO] [stdout]   --> advanced_functions/src/main.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn returns_closure() -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]  --> concurrency/src/message_passing.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) fn main() {
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `normal_messaging`
[INFO] [stdout]   --> concurrency/src/message_passing.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn normal_messaging() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `multi_producing`
[INFO] [stdout]   --> concurrency/src/message_passing.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn multi_producing() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `move_in_spawn_thread`
[INFO] [stdout]   --> concurrency/src/main.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn move_in_spawn_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `handle_spawn_thread`
[INFO] [stdout]   --> concurrency/src/main.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn handle_spawn_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file`
[INFO] [stdout]   --> errors/src/main.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file2`
[INFO] [stdout]   --> errors/src/main.rs:36:4
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn read_username_from_file2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_username_from_file3`
[INFO] [stdout]   --> errors/src/main.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn read_username_from_file3() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `backtrace`
[INFO] [stdout]   --> errors/src/main.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn backtrace() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_read_or_create`
[INFO] [stdout]   --> errors/src/main.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn file_read_or_create() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_read_or_create_closure`
[INFO] [stdout]   --> errors/src/main.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn file_read_or_create_closure() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `file_read_unwrap`
[INFO] [stdout]   --> errors/src/main.rs:84:4
[INFO] [stdout]    |
[INFO] [stdout] 84 | fn file_read_unwrap() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `s` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> ownership/src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let word = first_word(&s);
[INFO] [stdout]    |                           -- immutable borrow occurs here
[INFO] [stdout] 24 |     s.clear();
[INFO] [stdout]    |     ^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] 25 |     println!("the first word is: {}", word);
[INFO] [stdout]    |                                       ---- immutable borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `add_two`
[INFO] [stdout]  --> tests/src/test_organization.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn add_two(a: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> tests/src/lib.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     value: i32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "f1ee8ab509f9bedf70d30b6641e60db318f6bddee36318ab453db11d3f246010", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1ee8ab509f9bedf70d30b6641e60db318f6bddee36318ab453db11d3f246010", kill_on_drop: false }`
[INFO] [stdout] f1ee8ab509f9bedf70d30b6641e60db318f6bddee36318ab453db11d3f246010