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[INFO] [stdout] warning: unused variable: `list_of_strings`
[INFO] [stdout]   --> examples/advanced_funcs.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let list_of_strings: Vec<String> = list_of_numbers.iter().map(|i| i.to_string()).collect();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_strings`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> examples/advanced_funcs.rs:27:24
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn returns_closure(a: i32) -> impl Fn(i32) -> i32 {
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_one` is never used
[INFO] [stdout]  --> examples/advanced_funcs.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add_one(x: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_twice` is never used
[INFO] [stdout]  --> examples/advanced_funcs.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn do_twice<T>(f: T, arg: i32) -> i32
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main1` is never used
[INFO] [stdout]   --> examples/advanced_funcs.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn main1() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main2` is never used
[INFO] [stdout]   --> examples/advanced_funcs.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn main2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_closure` is never used
[INFO] [stdout]   --> examples/advanced_funcs.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn returns_closure(a: i32) -> impl Fn(i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_optional_closures` is never used
[INFO] [stdout]   --> examples/advanced_funcs.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn return_optional_closures(a: i32) -> Box<dyn Fn(i32) -> i32> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `screen`
[INFO] [stdout]   --> examples/oop_traits.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let screen = Screen {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_screen`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> examples/smart_pointers.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let b = Box::new(5);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> examples/smart_pointers.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let list = Cons(1, Box::new(Nil));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> examples/smart_pointers.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 |     Cons(i32, Box<List>),
[INFO] [stdout]    |     ---- ^^^  ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 14 -     Cons(i32, Box<List>),
[INFO] [stdout] 14 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main1` is never used
[INFO] [stdout]  --> examples/concurrency_share_state.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn main1() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `counterClone` should have a snake case name
[INFO] [stdout]   --> examples/concurrency_share_state.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let counterClone = counter.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^ help: convert the identifier to snake case: `counter_clone`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::future::Select`
[INFO] [stdout]   --> examples/traits_advanced.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | use futures::future::Select;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> examples/traits_advanced.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Counter {}
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main1` is never used
[INFO] [stdout]   --> examples/traits_advanced.rs:44:4
[INFO] [stdout]    |
[INFO] [stdout] 44 | fn main1() {}
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> examples/traits_advanced.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | struct Point {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main2` is never used
[INFO] [stdout]   --> examples/traits_advanced.rs:73:4
[INFO] [stdout]    |
[INFO] [stdout] 73 | fn main2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Pilot` is never used
[INFO] [stdout]   --> examples/traits_advanced.rs:81:7
[INFO] [stdout]    |
[INFO] [stdout] 81 | trait Pilot {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Wizard` is never used
[INFO] [stdout]   --> examples/traits_advanced.rs:85:7
[INFO] [stdout]    |
[INFO] [stdout] 85 | trait Wizard {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Human` is never constructed
[INFO] [stdout]   --> examples/traits_advanced.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | struct Human;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `fly` is never used
[INFO] [stdout]    --> examples/traits_advanced.rs:104:8
[INFO] [stdout]     |
[INFO] [stdout] 103 | impl Human {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] 104 |     fn fly(&self) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main3` is never used
[INFO] [stdout]    --> examples/traits_advanced.rs:109:4
[INFO] [stdout]     |
[INFO] [stdout] 109 | fn main3() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]    --> examples/traits_advanced.rs:154:8
[INFO] [stdout]     |
[INFO] [stdout] 154 | struct Wrapper(Vec<String>);
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]   --> examples/smart_pointers_memory_leak.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 50 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 51 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 52 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> examples/smart_pointers_counting.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 10 -     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout] 10 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> examples/types_advanced.rs:6:24
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn takes_long_type(f: Thunk) {
[INFO] [stdout]   |                        ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> examples/types_advanced.rs:19:23
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn generic<T: ?Sized>(t: &T) {
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]   --> examples/types_advanced.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let s1: &str = "Hello there!";
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> examples/types_advanced.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let s2: &str = "How's it going?";
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main2` is never used
[INFO] [stdout]  --> examples/types_advanced.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main2() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `generic` is never used
[INFO] [stdout]   --> examples/types_advanced.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn generic<T: ?Sized>(t: &T) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> examples/patterns_matching.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let x: i32 = 5;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `English`, `Russian`, and `Japanese` are never constructed
[INFO] [stdout]  --> examples/patterns_matching.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Language {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 3 |     English,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     Spanish,
[INFO] [stdout] 5 |     Russian,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 6 |     Japanese,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Language` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: use of mutable static is unsafe and requires unsafe block
[INFO] [stdout]   --> examples/unsafe.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 |     COUNTER += inc;
[INFO] [stdout]    |     ^^^^^^^ use of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stdout]   --> examples/unsafe.rs:81:1
[INFO] [stdout]    |
[INFO] [stdout] 81 | unsafe fn add_to_count(inc: u32) {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout]    = note: `#[warn(unsafe_op_in_unsafe_fn)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main1` is never used
[INFO] [stdout]  --> examples/unsafe.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main1() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `split_at_mut` is never used
[INFO] [stdout]   --> examples/unsafe.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main2` is never used
[INFO] [stdout]   --> examples/unsafe.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn main2() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `abs` is never used
[INFO] [stdout]   --> examples/unsafe.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn abs(input: i32) -> i32;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `core::slice::<impl [T]>::split_at_mut` that must be used
[INFO] [stdout]   --> examples/unsafe.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     r.split_at_mut(1);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let _ = r.split_at_mut(1);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0133`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> examples/smart_pointers_drop.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let a = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 40.85s
[INFO] running `Command { std: "docker" "inspect" "2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1", kill_on_drop: false }`
[INFO] [stdout] 2c71dda7c5d199529a5df8a3f59f3b9105a40e791d5ad8aa54f617ef292167a1
