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[INFO] [stdout] f8aa6e603d15447f8721b2b7cc155c82d5bb8e66
[INFO] checking Victor-shadow/rust against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVictor-shadow%2Frust" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Victor-shadow/rust
[INFO] finished tweaking git repo https://github.com/Victor-shadow/rust
[INFO] tweaked toml for git repo https://github.com/Victor-shadow/rust written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Victor-shadow/rust on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
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[INFO] crate git repo https://github.com/Victor-shadow/rust already has a lockfile, it will not be regenerated
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[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/bin/ReferenceCycle.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/ReferenceCycle.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Cons(i32, RefCell<Rc<List>>), //the second element in the Cons variant is RefCell<Rc<List>>
[INFO] [stdout]   |     ---- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field 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 field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     Cons(i32, RefCell<Rc<List>>), //the second element in the Cons variant is RefCell<Rc<List>>
[INFO] [stdout] 7 +     Cons((), RefCell<Rc<List>>), //the second element in the Cons variant is RefCell<Rc<List>>
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]  --> src/bin/TraitBounds.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Pair<T>{ //always implements the new fn to return a new instance
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/bin/TraitBounds.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl <T> Pair<T> {
[INFO] [stdout]   | ---------------- associated function in this implementation
[INFO] [stdout] 9 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/bin/TraitBounds.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl <T: Display + PartialOrd> Pair<T> { //Pair<T> only implements the cmp_display method if its inner type T implements the traits
[INFO] [stdout]    | -------------------------------------- method in this implementation
[INFO] [stdout] 15 |     fn cmp_display(&self){
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ignore_case` is never read
[INFO] [stdout]  --> src/bin/InputOutputIterators.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Config {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 7 |     ignore_case: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Some` is never constructed
[INFO] [stdout]  --> src/bin/ClosuresUnwrapElseMethod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum MyOption<T>{
[INFO] [stdout]   |      -------- variant in this enum
[INFO] [stdout] 2 |     Some(T),
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Some` is never constructed
[INFO] [stdout]  --> src/bin/ClosuresUnwrapElseMethod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum MyOption<T>{
[INFO] [stdout]   |      -------- variant in this enum
[INFO] [stdout] 2 |     Some(T),
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::SpreadsheetCell::Float`
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::SpreadsheetCell::Float;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Int(i32),
[INFO] [stdout]   |     --- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     Int(i32),
[INFO] [stdout] 4 +     Int(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Float(f64),
[INFO] [stdout]   |     ----- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Float(f64),
[INFO] [stdout] 5 +     Float(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Text(String,)
[INFO] [stdout]   |     ---- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     Text(String,)
[INFO] [stdout] 6 +     Text((),)
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]  --> src/bin/ClosuresSortByKey.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout] 4 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` 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: method `area` is never used
[INFO] [stdout]  --> src/bin/MethodMultipleParams.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Rectangle {
[INFO] [stdout]   | -------------- method in this implementation
[INFO] [stdout] 9 |     fn area(&self) -> u32 {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]  --> src/bin/PatternIgnoreStructFeatures.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 5 |     x: i32,
[INFO] [stdout] 6 |     y: i32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 7 |     z: 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: variant `Rgb` is never constructed
[INFO] [stdout]  --> src/bin/PatternDestructureNestedStructsEnums.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Color {
[INFO] [stdout]   |      ----- variant in this enum
[INFO] [stdout] 2 |     Rgb(i32, 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: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]  --> src/bin/PatternDestructureNestedStructsEnums.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 7 |     Quit,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 8 |     Move {x: i32, y: i32},
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     Write(String),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rx`
[INFO] [stdout]  --> src/bin/ThreadChannel.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]   |              ^^ help: if this is intentional, prefix it with an underscore: `_rx`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]  --> src/bin/PanicMacro.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     panic!("Macro");
[INFO] [stdout]   |     --------------- any code following this expression is unreachable
[INFO] [stdout] 3 |     println!("End of main")
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]   = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/bin/DropTrait.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let c = CustomSmartPointer{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/bin/DropTrait.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let d = CustomSmartPointer{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/bin/MatchOption.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let six = plus_one(five); //when this method is invoked, the variable x in the body of plus_one will have a value Some(5)
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/bin/MatchOption.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let none = plus_one(None);
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: you might have meant to pattern match on the similarly named variant `None`
[INFO] [stdout]    |
[INFO] [stdout] 13 -     let none = plus_one(None);
[INFO] [stdout] 13 +     let std::prelude::v1::None = plus_one(None);
[INFO] [stdout]    |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _none = plus_one(None);
[INFO] [stdout]    |         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/bin/ReferenceCount.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let b = Cons(3, Rc::clone(&a));
[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: `c`
[INFO] [stdout]   --> src/bin/ReferenceCount.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let c = Cons(4, Rc::clone(&a));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/bin/ReferenceCount.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Cons(i32, Rc<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] 2 -     Cons(i32, Rc<List>),
[INFO] [stdout] 2 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]  --> src/bin/GenericsMethod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point<T, U>{
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 2 |     x: T,
[INFO] [stdout] 3 |     y: U,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]  --> src/bin/MethodMultipleParams.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Rectangle {
[INFO] [stdout]   | -------------- method in this implementation
[INFO] [stdout] 9 |     fn area(&self) -> u32 {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]  --> src/bin/TupleStructs.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Color` 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`, `1`, and `2` are never read
[INFO] [stdout]  --> src/bin/TupleStructs.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Point(i32, i32, i32);
[INFO] [stdout]   |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `baby_name` is never used
[INFO] [stdout]   --> src/bin/TraitAssociatedFunction.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Dog {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 12 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]  --> src/bin/TupleStructs.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Color` 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`, `1`, and `2` are never read
[INFO] [stdout]  --> src/bin/TupleStructs.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Point(i32, i32, i32);
[INFO] [stdout]   |        ----- ^^^  ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/bin/ReferenceCell.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     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] 5 -     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout] 5 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/bin/RecoverableError.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |         Ok(f) => {
[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: unnecessary trailing semicolon
[INFO] [stdout]   --> src/bin/AsyncChannelMultipleProducers.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | ;
[INFO] [stdout]    | ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/AsyncChannelMultipleProducers.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let (tx, mut rx) = channel::unbounded();
[INFO] [stdout]   |              ----^^
[INFO] [stdout]   |              |
[INFO] [stdout]   |              help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]  --> src/bin/PatternDestructureNestedStructsEnums.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Color {
[INFO] [stdout]   |      ----- variant in this enum
[INFO] [stdout] 2 |     Rgb(i32, 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: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]  --> src/bin/PatternDestructureNestedStructsEnums.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 7 |     Quit,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 8 |     Move {x: i32, y: i32},
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     Write(String),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/bin/ReferenceCounting.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let b = Cons(3, Rc::clone(&a)); //Rc::clone - increments the Reference count
[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: `c`
[INFO] [stdout]   --> src/bin/ReferenceCounting.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let c = Cons(4, Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/bin/ReferenceCounting.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Cons(i32, Rc<List>), //Rc<T> // a smart pointer for shared ownership
[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] 2 -     Cons(i32, Rc<List>), //Rc<T> // a smart pointer for shared ownership
[INFO] [stdout] 2 +     Cons((), ()), //Rc<T> // a smart pointer for shared ownership
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]  --> src/bin/GenericsMethod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point<T, U>{
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 2 |     x: T,
[INFO] [stdout] 3 |     y: U,
[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 does not need to be mutable
[INFO] [stdout]   --> src/bin/AsyncChannels.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |             let mut rx = rx; //move rx into async block
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/AsyncChannels.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let (tx, mut rx) = channel::unbounded();
[INFO] [stdout]   |                  ----^^
[INFO] [stdout]   |                  |
[INFO] [stdout]   |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]  --> src/bin/ClosureFnOnceTrait.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout] 4 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` 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: unused variable: `six`
[INFO] [stdout]   --> src/bin/MatchOption.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let six = plus_one(five); //when this method is invoked, the variable x in the body of plus_one will have a value Some(5)
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/bin/MatchOption.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let none = plus_one(None);
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: you might have meant to pattern match on the similarly named variant `None`
[INFO] [stdout]    |
[INFO] [stdout] 13 -     let none = plus_one(None);
[INFO] [stdout] 13 +     let std::prelude::v1::None = plus_one(None);
[INFO] [stdout]    |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _none = plus_one(None);
[INFO] [stdout]    |         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coin0`
[INFO] [stdout]   --> src/bin/MatchConstruct.rs:15:32
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn value_in_cents(coin : Coin, coin0: Coin) -> u8 {
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_coin0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alabama` is never constructed
[INFO] [stdout]  --> src/bin/MatchConstruct.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum UsState {
[INFO] [stdout]   |      ------- variant in this enum
[INFO] [stdout] 4 |     Alabama,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `UsState` 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: variant `Nickel` is never constructed
[INFO] [stdout]   --> src/bin/MatchConstruct.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum Coin {
[INFO] [stdout]    |      ---- variant in this enum
[INFO] [stdout]  9 |     Penny,
[INFO] [stdout] 10 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/bin/AsyncChannelMultipleProducers.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | ;
[INFO] [stdout]    | ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `baby_name` is never used
[INFO] [stdout]   --> src/bin/TraitAssociatedFunction.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Dog {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 12 |     fn baby_name() -> String {
[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 does not need to be mutable
[INFO] [stdout]  --> src/bin/AsyncChannelMultipleProducers.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let (tx, mut rx) = channel::unbounded();
[INFO] [stdout]   |              ----^^
[INFO] [stdout]   |              |
[INFO] [stdout]   |              help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]  --> src/bin/ClosureFnOnceTrait.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout] 4 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` 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: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]  --> src/bin/PatternDestructureEnum.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 2 |     Quit,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 3 |     Move {x:i32, y:i32},
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     Write(String),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]  --> src/bin/TraitBounds.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Pair<T>{ //always implements the new fn to return a new instance
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/bin/TraitBounds.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl <T> Pair<T> {
[INFO] [stdout]   | ---------------- associated function in this implementation
[INFO] [stdout] 9 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/bin/TraitBounds.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl <T: Display + PartialOrd> Pair<T> { //Pair<T> only implements the cmp_display method if its inner type T implements the traits
[INFO] [stdout]    | -------------------------------------- method in this implementation
[INFO] [stdout] 15 |     fn cmp_display(&self){
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/bin/ReferenceCount.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let b = Cons(3, Rc::clone(&a));
[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: `c`
[INFO] [stdout]   --> src/bin/ReferenceCount.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         let c = Cons(4, Rc::clone(&a));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/bin/ReferenceCount.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Cons(i32, Rc<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] 2 -     Cons(i32, Rc<List>),
[INFO] [stdout] 2 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set1`
[INFO] [stdout]  --> src/bin/HashSet.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let set1: HashSet<i32> = HashSet::new();
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_set1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set2`
[INFO] [stdout]  --> src/bin/HashSet.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let set2: HashSet<i32>  = HashSet::with_capacity(10);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_set2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set3`
[INFO] [stdout]   --> src/bin/HashSet.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let set3 = HashSet::from([100, 200, 300, 400, 500]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_set3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/bin/HashSet.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let s = RandomState::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ignore_case` is never read
[INFO] [stdout]  --> src/bin/InputOutputIterators.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Config {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 7 |     ignore_case: bool,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/bin/ReferenceCycle.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/ReferenceCycle.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Cons(i32, RefCell<Rc<List>>), //the second element in the Cons variant is RefCell<Rc<List>>
[INFO] [stdout]   |     ---- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field 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 field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     Cons(i32, RefCell<Rc<List>>), //the second element in the Cons variant is RefCell<Rc<List>>
[INFO] [stdout] 7 +     Cons((), RefCell<Rc<List>>), //the second element in the Cons variant is RefCell<Rc<List>>
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]  --> src/bin/ClosuresSortByKey.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- field in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout] 4 |     height: u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` 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 `width` and `height` are never read
[INFO] [stdout]  --> src/bin/StructsDeriveDebug.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     height:u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` 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: unused import: `crate::SpreadsheetCell::Float`
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::SpreadsheetCell::Float;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]  --> src/bin/StructsDeriveDebug.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 3 |     width: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     height:u32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Rectangle` 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: field `0` is never read
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Int(i32),
[INFO] [stdout]   |     --- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     Int(i32),
[INFO] [stdout] 4 +     Int(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Float(f64),
[INFO] [stdout]   |     ----- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Float(f64),
[INFO] [stdout] 5 +     Float(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/VectorsEnum.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Text(String,)
[INFO] [stdout]   |     ---- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     Text(String,)
[INFO] [stdout] 6 +     Text((),)
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rx`
[INFO] [stdout]  --> src/bin/ThreadChannel.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let (tx, rx) = mpsc::channel();
[INFO] [stdout]   |              ^^ help: if this is intentional, prefix it with an underscore: `_rx`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]  --> src/bin/PanicMacro.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     panic!("Macro");
[INFO] [stdout]   |     --------------- any code following this expression is unreachable
[INFO] [stdout] 3 |     println!("End of main")
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]   = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/AsyncChannels.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |             let mut rx = rx; //move rx into async block
[INFO] [stdout]    |                 ----^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/AsyncChannels.rs:7:18
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let (tx, mut rx) = channel::unbounded();
[INFO] [stdout]   |                  ----^^
[INFO] [stdout]   |                  |
[INFO] [stdout]   |                  help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/bin/ExpectMethodErrorHandling.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let f = File::open("Cargo.toml").expect("File not able to open!");
[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: `set1`
[INFO] [stdout]  --> src/bin/HashSet.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let set1: HashSet<i32> = HashSet::new();
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_set1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set2`
[INFO] [stdout]  --> src/bin/HashSet.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let set2: HashSet<i32>  = HashSet::with_capacity(10);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_set2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set3`
[INFO] [stdout]   --> src/bin/HashSet.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let set3 = HashSet::from([100, 200, 300, 400, 500]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_set3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/bin/HashSet.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let s = RandomState::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/bin/ReferenceNode.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `child` are never read
[INFO] [stdout]   --> src/bin/ReferenceNode.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 20 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     child: 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 `width` and `height` are never read
[INFO] [stdout]   --> src/bin/TraitObject.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct SelectBox {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 21 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/bin/DropTrait.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let c = CustomSmartPointer{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/bin/DropTrait.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let d = CustomSmartPointer{
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coin0`
[INFO] [stdout]   --> src/bin/MatchConstruct.rs:15:32
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn value_in_cents(coin : Coin, coin0: Coin) -> u8 {
[INFO] [stdout]    |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_coin0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alabama` is never constructed
[INFO] [stdout]  --> src/bin/MatchConstruct.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum UsState {
[INFO] [stdout]   |      ------- variant in this enum
[INFO] [stdout] 4 |     Alabama,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `UsState` 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: variant `Nickel` is never constructed
[INFO] [stdout]   --> src/bin/MatchConstruct.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | enum Coin {
[INFO] [stdout]    |      ---- variant in this enum
[INFO] [stdout]  9 |     Penny,
[INFO] [stdout] 10 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> src/bin/ExpectMethodErrorHandling.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let f = File::open("Cargo.toml").expect("File not able to open!");
[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: fields `y` and `z` are never read
[INFO] [stdout]  --> src/bin/PatternIgnoreStructFeatures.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Point {
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 5 |     x: i32,
[INFO] [stdout] 6 |     y: i32,
[INFO] [stdout]   |     ^
[INFO] [stdout] 7 |     z: 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: fields `width` and `height` are never read
[INFO] [stdout]   --> src/bin/TraitObject.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct SelectBox {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 21 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 22 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/bin/ReferenceCounting.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let b = Cons(3, Rc::clone(&a)); //Rc::clone - increments the Reference count
[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: `c`
[INFO] [stdout]   --> src/bin/ReferenceCounting.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let c = Cons(4, Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/bin/ReferenceCounting.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Cons(i32, Rc<List>), //Rc<T> // a smart pointer for shared ownership
[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] 2 -     Cons(i32, Rc<List>), //Rc<T> // a smart pointer for shared ownership
[INFO] [stdout] 2 +     Cons((), ()), //Rc<T> // a smart pointer for shared ownership
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]  --> src/bin/PatternDestructureEnum.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 2 |     Quit,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 3 |     Move {x:i32, y:i32},
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     Write(String),
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]   --> src/bin/HashMapOperations.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let score = scores.get(&team_name).copied().unwrap_or(0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Ref`
[INFO] [stdout]  --> src/bin/ReferenceNode.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Ref, RefCell};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `child` are never read
[INFO] [stdout]   --> src/bin/ReferenceNode.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Node {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 20 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     child: 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: unused variable: `f`
[INFO] [stdout]  --> src/bin/RecoverableError.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |         Ok(f) => {
[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: `score`
[INFO] [stdout]   --> src/bin/HashMapOperations.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let score = scores.get(&team_name).copied().unwrap_or(0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::alloc::System`
[INFO] [stdout]  --> src/bin/TreeSetAllocator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::alloc::System;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::alloc::System`
[INFO] [stdout]  --> src/bin/TreeSetAllocator.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::alloc::System;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/bin/ReferenceCell.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     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] 5 -     Cons(Rc<RefCell<i32>>, Rc<List>),
[INFO] [stdout] 5 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 04s
[INFO] running `Command { std: "docker" "inspect" "176a5dc6eba42b1a5331c087ecf0c4e9f4f8182b6969f8e50222a21ed7502190", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "176a5dc6eba42b1a5331c087ecf0c4e9f4f8182b6969f8e50222a21ed7502190", kill_on_drop: false }`
[INFO] [stdout] 176a5dc6eba42b1a5331c087ecf0c4e9f4f8182b6969f8e50222a21ed7502190