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[INFO] [stdout] warning: the feature `const_generics` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> examples/const_generic.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_generics, const_fn, const_in_array_repeat_expressions)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #44580 <https://github.com/rust-lang/rust/issues/44580> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `items`
[INFO] [stdout]  --> examples/const_generic.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     items: [MaybeUninit<T>; N],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rust_decimal::prelude::ToPrimitive`
[INFO] [stdout]  --> examples/rust_decimal_lib_test.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use rust_decimal::prelude::ToPrimitive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::BinaryHeap`
[INFO] [stdout]   --> examples/gzip.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     use std::collections::BinaryHeap;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `URL`
[INFO] [stdout]  --> examples/hyper_http_client.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const URL: &str = "https://jsonplaceholder.typicode.com/users/1";
[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: unused variable: `head`
[INFO] [stdout]   --> examples/double_linked_list.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let mut head: Node<i32> = Node::new(-1);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_head`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/double_linked_list.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let mut head: Node<i32> = Node::new(-1);
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `data`
[INFO] [stdout]  --> examples/double_linked_list.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     data: T,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `prev`
[INFO] [stdout]  --> examples/double_linked_list.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     prev: Option<Weak<RefCell<Node<T>>>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]  --> examples/double_linked_list.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     next: Option<Rc<RefCell<Node<T>>>>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `List`
[INFO] [stdout]   --> examples/double_linked_list.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct List<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 18s
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[INFO] [stdout] d12e06b24900399c1948b973204be9e50b79ab4fede13b994eff6500d760c17f