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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/viraj124/rust-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fviraj124%2Frust-examples", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fviraj124%2Frust-examples" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
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[INFO] started tweaking git repo https://github.com/viraj124/rust-examples
[INFO] finished tweaking git repo https://github.com/viraj124/rust-examples
[INFO] tweaked toml for git repo https://github.com/viraj124/rust-examples written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/viraj124/rust-examples on toolchain 656ccbe796ff98def9b555c118e1620c5389e3b2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+656ccbe796ff98def9b555c118e1620c5389e3b2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/viraj124/rust-examples already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+656ccbe796ff98def9b555c118e1620c5389e3b2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trpl v0.2.0
[INFO] [stderr]   Downloaded tempfile v3.17.1
[INFO] [stderr]   Downloaded tokio v1.42.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "inspect" "f171e182cc4e15db8cdb91a7abf546d9bc4d9f3b73c13d928ea378aa1753ea7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f171e182cc4e15db8cdb91a7abf546d9bc4d9f3b73c13d928ea378aa1753ea7c" "/opt/rustwide/cargo-home/bin/cargo" "+656ccbe796ff98def9b555c118e1620c5389e3b2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f171e182cc4e15db8cdb91a7abf546d9bc4d9f3b73c13d928ea378aa1753ea7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f171e182cc4e15db8cdb91a7abf546d9bc4d9f3b73c13d928ea378aa1753ea7c" "/opt/rustwide/cargo-home/bin/cargo" "+656ccbe796ff98def9b555c118e1620c5389e3b2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling quote v1.0.43
[INFO] [stderr]    Compiling libc v0.2.167
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking mio v1.1.0
[INFO] [stderr]     Checking phf_shared v0.11.3
[INFO] [stderr]    Compiling openssl-sys v0.9.111
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking phf_shared v0.10.0
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking servo_arc v0.3.0
[INFO] [stderr]     Checking rustls-pemfile v2.2.0
[INFO] [stderr]     Checking ego-tree v0.6.3
[INFO] [stderr]     Checking ch12-minigrep-project v0.1.0 (/opt/rustwide/workdir/ch12-minigrep-project)
[INFO] [stderr]     Checking ch11-testing v0.1.0 (/opt/rustwide/workdir/ch11-testing)
[INFO] [stderr]     Checking ch15-smart-pointers v0.1.0 (/opt/rustwide/workdir/ch15-smart-pointers)
[INFO] [stderr]     Checking ch08-common-collections v0.1.0 (/opt/rustwide/workdir/ch08-common-collections)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> ch11-testing/src/lib.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 |         if(self.width < 10) {
[INFO] [stdout]    |           ^               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 12 -         if(self.width < 10) {
[INFO] [stdout] 12 +         if self.width < 10 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `isLargerThan` should have a snake case name
[INFO] [stdout]  --> ch11-testing/src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn isLargerThan(&self, other: &Rectangle) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^ help: convert the identifier to snake case: `is_larger_than`
[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 imports: `ErrorKind` and `self`
[INFO] [stdout]  --> ch08-common-collections/src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, Read, ErrorKind};
[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::error::Error`
[INFO] [stdout]  --> ch08-common-collections/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `spead` should have an upper camel case name
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 |     enum spead {
[INFO] [stdout]    |          ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Spead`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> ch08-common-collections/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, Read, ErrorKind};
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `third`
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Some(third) => println!("third"),
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_third`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let s = format!("{s1}-{s2}-{s3}");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> ch08-common-collections/src/main.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let f = File::open("file.txt");
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Decimal(f32),
[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] 41 -         Decimal(f32),
[INFO] [stdout] 41 +         Decimal(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:42:14
[INFO] [stdout]    |
[INFO] [stdout] 42 |         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] 42 -         Text(String)
[INFO] [stdout] 42 +         Text(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> ch11-testing/src/main.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |         if (add(1, 4) == 5) {
[INFO] [stdout]    |            ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 38 -         if (add(1, 4) == 5) {
[INFO] [stdout] 38 +         if add(1, 4) == 5 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_with_Result` should have a snake case name
[INFO] [stdout]   --> ch11-testing/src/main.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn test_with_Result() -> Result<(), String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_with_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> ch12-minigrep-project/src/main.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     if (finder.isSensitive) {
[INFO] [stdout]    |        ^                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 -     if (finder.isSensitive) {
[INFO] [stdout] 27 +     if finder.isSensitive {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]   --> ch15-smart-pointers/src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | mod lib;  // Reference cycle demonstration in lib.rs
[INFO] [stdout]    | ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: lib.rs is the root of this crate's library target
[INFO] [stdout]    = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]    = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `New_List` should have an upper camel case name
[INFO] [stdout]    --> ch15-smart-pointers/src/main.rs:253:6
[INFO] [stdout]     |
[INFO] [stdout] 253 | enum New_List {
[INFO] [stdout]     |      ^^^^^^^^ help: convert the identifier to upper camel case: `NewList`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ahash v0.8.12
[INFO] [stdout] warning: unused import: `ch11_testing::Rectangle`
[INFO] [stdout]  --> ch11-testing/src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use ch11_testing::Rectangle;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `finderConfig` should have a snake case name
[INFO] [stdout]  --> ch12-minigrep-project/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let finderConfig = Finder::new(env::args());
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `finder_config`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `isSensitive` should have a snake case name
[INFO] [stdout]   --> ch12-minigrep-project/src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     isSensitive: bool
[INFO] [stdout]    |     ^^^^^^^^^^^ help: convert the identifier to snake case: `is_sensitive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `isSensitive` should have a snake case name
[INFO] [stdout]   --> ch12-minigrep-project/src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let isSensitive = env::var("IGNORE_CASE").is_ok();
[INFO] [stdout]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `is_sensitive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch16-concurrency v0.1.0 (/opt/rustwide/workdir/ch16-concurrency)
[INFO] [stderr]     Checking ch20-advanced-features v0.1.0 (/opt/rustwide/workdir/ch20-advanced-features)
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]   --> ch15-smart-pointers/src/main.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | mod lib;  // Reference cycle demonstration in lib.rs
[INFO] [stdout]    | ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: lib.rs is the root of this crate's library target
[INFO] [stdout]    = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]    = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `New_List` should have an upper camel case name
[INFO] [stdout]    --> ch15-smart-pointers/src/main.rs:253:6
[INFO] [stdout]     |
[INFO] [stdout] 253 | enum New_List {
[INFO] [stdout]     |      ^^^^^^^^ help: convert the identifier to upper camel case: `NewList`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> ch12-minigrep-project/src/main.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 |     if (finder.isSensitive) {
[INFO] [stdout]    |        ^                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 -     if (finder.isSensitive) {
[INFO] [stdout] 27 +     if finder.isSensitive {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking phf v0.10.1
[INFO] [stdout] warning: variable `finderConfig` should have a snake case name
[INFO] [stdout]  --> ch12-minigrep-project/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let finderConfig = Finder::new(env::args());
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `finder_config`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `isSensitive` should have a snake case name
[INFO] [stdout]   --> ch12-minigrep-project/src/main.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     isSensitive: bool
[INFO] [stdout]    |     ^^^^^^^^^^^ help: convert the identifier to snake case: `is_sensitive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `isSensitive` should have a snake case name
[INFO] [stdout]   --> ch12-minigrep-project/src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let isSensitive = env::var("IGNORE_CASE").is_ok();
[INFO] [stdout]    |             ^^^^^^^^^^^ help: convert the identifier to snake case: `is_sensitive`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `messenger`, `max`, and `value` are never read
[INFO] [stdout]   --> ch15-smart-pointers/src/main.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub struct Email<'a, T: Messenger> {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 29 |     messenger: &'a T,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 30 |     max: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 31 |     value: usize,
[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 items `new` and `set_value` are never used
[INFO] [stdout]    --> ch15-smart-pointers/src/main.rs:132:12
[INFO] [stdout]     |
[INFO] [stdout] 128 | /     impl<'a, T> Email<'a, T>
[INFO] [stdout] 129 | |     where
[INFO] [stdout] 130 | |         T: Messenger,
[INFO] [stdout]     | |_____________________- associated items in this implementation
[INFO] [stdout] 131 |       {
[INFO] [stdout] 132 |           fn new(messenger: &'a T, max: usize) -> Self {
[INFO] [stdout]     |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |           fn set_value(&mut self, value: usize) {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]    --> ch15-smart-pointers/src/main.rs:254:28
[INFO] [stdout]     |
[INFO] [stdout] 254 |     Cons(Rc<RefCell<i32>>, Rc<New_List>),
[INFO] [stdout]     |     ----                   ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `New_List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 254 -     Cons(Rc<RefCell<i32>>, Rc<New_List>),
[INFO] [stdout] 254 +     Cons(Rc<RefCell<i32>>, ()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> ch15-smart-pointers/src/lib.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Cons(i32, 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] 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] 8 -     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout] 8 +     Cons((), RefCell<Rc<List>>),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]    --> ch15-smart-pointers/src/main.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout]  34 | fn main() {
[INFO] [stdout]     | --------- move the `impl` block outside of this function `main`
[INFO] [stdout] ...
[INFO] [stdout] 128 |     impl<'a, T> Email<'a, T>
[INFO] [stdout]     |     ^^^^^^^^^^^^-----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 `Email` is not local
[INFO] [stdout]     |
[INFO] [stdout]     = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]     = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch05-structs v0.1.0 (/opt/rustwide/workdir/ch05-structs)
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]    --> ch15-smart-pointers/src/main.rs:254:28
[INFO] [stdout]     |
[INFO] [stdout] 254 |     Cons(Rc<RefCell<i32>>, Rc<New_List>),
[INFO] [stdout]     |     ----                   ^^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `New_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] 254 -     Cons(Rc<RefCell<i32>>, Rc<New_List>),
[INFO] [stdout] 254 +     Cons(Rc<RefCell<i32>>, ()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> ch15-smart-pointers/src/lib.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Cons(i32, 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] 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] 8 -     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout] 8 +     Cons((), RefCell<Rc<List>>),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]    --> ch15-smart-pointers/src/main.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout]  34 | fn main() {
[INFO] [stdout]     | --------- move the `impl` block outside of this function `main`
[INFO] [stdout] ...
[INFO] [stdout] 128 |     impl<'a, T> Email<'a, T>
[INFO] [stdout]     |     ^^^^^^^^^^^^-----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 `Email` is not local
[INFO] [stdout]     |
[INFO] [stdout]     = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]     = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind` and `self`
[INFO] [stdout]  --> ch08-common-collections/src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, Read, ErrorKind};
[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::error::Error`
[INFO] [stdout]  --> ch08-common-collections/src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `spead` should have an upper camel case name
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 |     enum spead {
[INFO] [stdout]    |          ^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Spead`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch18-oop-patterns v0.1.0 (/opt/rustwide/workdir/ch18-oop-patterns)
[INFO] [stderr]     Checking ch03-common-concepts v0.1.0 (/opt/rustwide/workdir/ch03-common-concepts)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> ch11-testing/src/lib.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 |         if(self.width < 10) {
[INFO] [stdout]    |           ^               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 12 -         if(self.width < 10) {
[INFO] [stdout] 12 +         if self.width < 10 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> ch08-common-collections/src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, Read, ErrorKind};
[INFO] [stdout]   |                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `isLargerThan` should have a snake case name
[INFO] [stdout]  --> ch11-testing/src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn isLargerThan(&self, other: &Rectangle) -> bool {
[INFO] [stdout]   |            ^^^^^^^^^^^^ help: convert the identifier to snake case: `is_larger_than`
[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 variable: `third`
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 |         Some(third) => println!("third"),
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_third`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let s = format!("{s1}-{s2}-{s3}");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> ch08-common-collections/src/main.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let f = File::open("file.txt");
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:41:17
[INFO] [stdout]    |
[INFO] [stdout] 41 |         Decimal(f32),
[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] 41 -         Decimal(f32),
[INFO] [stdout] 41 +         Decimal(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch08-common-collections/src/main.rs:42:14
[INFO] [stdout]    |
[INFO] [stdout] 42 |         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] 42 -         Text(String)
[INFO] [stdout] 42 +         Text(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch10-lifetimes v0.1.0 (/opt/rustwide/workdir/ch10-lifetimes)
[INFO] [stderr]     Checking ch15-reference-cycles v0.1.0 (/opt/rustwide/workdir/ch15-reference-cycles)
[INFO] [stderr]     Checking tokio v1.42.1
[INFO] [stderr]     Checking ch13-closures v0.1.0 (/opt/rustwide/workdir/ch13-closures)
[INFO] [stdout] warning: fields `sign_in_count` and `active` are never read
[INFO] [stdout]   --> ch05-structs/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 30 |     sign_in_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 31 |     active: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` 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 `value` and `child` are never read
[INFO] [stdout]  --> ch15-reference-cycles/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 7 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 9 |     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] [stderr]     Checking ch19-pattern-matching v0.1.0 (/opt/rustwide/workdir/ch19-pattern-matching)
[INFO] [stdout] warning: fields `sign_in_count` and `active` are never read
[INFO] [stdout]   --> ch05-structs/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 30 |     sign_in_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 31 |     active: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` 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] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]     Checking ch13-iterators v0.1.0 (/opt/rustwide/workdir/ch13-iterators)
[INFO] [stdout] warning: type alias `Thunk` is never used
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:333:10
[INFO] [stdout]     |
[INFO] [stdout] 333 |     type Thunk = Box<dyn Fn() + Send + 'static>;
[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 `takes_long_type` is never used
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:335:8
[INFO] [stdout]     |
[INFO] [stdout] 335 |     fn takes_long_type(_f: Thunk) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:339:10
[INFO] [stdout]     |
[INFO] [stdout] 339 |     type Result<T> = std::result::Result<T, std::io::Error>;
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:416:19
[INFO] [stdout]     |
[INFO] [stdout] 416 |     struct Status(i32);
[INFO] [stdout]     |            ------ ^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Status` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch04-ownership v0.1.0 (/opt/rustwide/workdir/ch04-ownership)
[INFO] [stderr]     Checking ch10-traits v0.1.0 (/opt/rustwide/workdir/ch10-traits)
[INFO] [stderr]     Checking ch10-generics v0.1.0 (/opt/rustwide/workdir/ch10-generics)
[INFO] [stdout] warning: variant `Hsv` is never constructed
[INFO] [stdout]    --> ch19-pattern-matching/src/main.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 174 | enum Color {
[INFO] [stdout]     |      ----- variant in this enum
[INFO] [stdout] 175 |     Rgb(i32, i32, i32),
[INFO] [stdout] 176 |     Hsv(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]    --> ch19-pattern-matching/src/main.rs:180:5
[INFO] [stdout]     |
[INFO] [stdout] 179 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 180 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 181 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 182 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch07-modules-packages v0.1.0 (/opt/rustwide/workdir/ch07-modules-packages)
[INFO] [stderr]    Compiling openssl v0.10.75
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> ch10-traits/src/main.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Pair<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: method `cmp_display` is never used
[INFO] [stdout]   --> ch10-traits/src/main.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 69 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_bound_impl` is never used
[INFO] [stdout]    --> ch10-traits/src/main.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn trait_bound_impl<T: Summary>(val: &T) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_bound_impl_complex` is never used
[INFO] [stdout]    --> ch10-traits/src/main.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn trait_bound_impl_complex<T, U>(item1: &T, item2: &U)
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]     Checking ch06-enums v0.1.0 (/opt/rustwide/workdir/ch06-enums)
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> ch10-generics/src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Point<T> {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 20 |     x: T,
[INFO] [stdout]    |     ^
[INFO] [stdout] 21 |     y: 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: method `get_x` is never used
[INFO] [stdout]   --> ch10-generics/src/main.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl<T: Copy> Point<T> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 37 |     fn get_x(&self) -> T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_x_f64` is never used
[INFO] [stdout]   --> ch10-generics/src/main.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl Point<f64> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 45 |     fn get_x_f64(&self) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `breaky` should have an upper camel case name
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub struct breaky {
[INFO] [stdout]    |                    ^^^^^^ help: convert the identifier to upper camel case: `Breaky`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Fashion` is never constructed
[INFO] [stdout]   --> ch13-iterators/src/main.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Fashion {
[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 `is_correct` is never used
[INFO] [stdout]   --> ch13-iterators/src/main.rs:42:4
[INFO] [stdout]    |
[INFO] [stdout] 42 | fn is_correct(types: Vec<Fashion>, my_size: u32) -> Vec<Fashion> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eat` is never used
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn eat() {
[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 `breaky` is never constructed
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub struct breaky {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `make` is never used
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |         impl breaky {
[INFO] [stdout]    |         ----------- associated function in this implementation
[INFO] [stdout] 26 |             pub fn make(bread: &str) -> breaky {
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Hsv` is never constructed
[INFO] [stdout]    --> ch19-pattern-matching/src/main.rs:176:5
[INFO] [stdout]     |
[INFO] [stdout] 174 | enum Color {
[INFO] [stdout]     |      ----- variant in this enum
[INFO] [stdout] 175 |     Rgb(i32, i32, i32),
[INFO] [stdout] 176 |     Hsv(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]    --> ch19-pattern-matching/src/main.rs:180:5
[INFO] [stdout]     |
[INFO] [stdout] 179 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 180 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 181 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 182 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> ch10-generics/src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Point<T> {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 20 |     x: T,
[INFO] [stdout]    |     ^
[INFO] [stdout] 21 |     y: 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: method `get_x` is never used
[INFO] [stdout]   --> ch10-generics/src/main.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl<T: Copy> Point<T> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 37 |     fn get_x(&self) -> T {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_x_f64` is never used
[INFO] [stdout]   --> ch10-generics/src/main.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl Point<f64> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 45 |     fn get_x_f64(&self) -> f64 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> ch10-traits/src/main.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct Pair<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: method `cmp_display` is never used
[INFO] [stdout]   --> ch10-traits/src/main.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 68 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 69 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_bound_impl` is never used
[INFO] [stdout]    --> ch10-traits/src/main.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn trait_bound_impl<T: Summary>(val: &T) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trait_bound_impl_complex` is never used
[INFO] [stdout]    --> ch10-traits/src/main.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn trait_bound_impl_complex<T, U>(item1: &T, item2: &U)
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 |     V4(u8, u8, u8, u8),
[INFO] [stdout]    |     -- ^^  ^^  ^^  ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddress` 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] 52 -     V4(u8, u8, u8, u8),
[INFO] [stdout] 52 +     V4((), (), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     V6(String),
[INFO] [stdout]    |     -- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddress` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 53 -     V6(String),
[INFO] [stdout] 53 +     V6(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     Move { x: i32, y: i32 },
[INFO] [stdout]    |     ----   ^       ^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |     Write(String),
[INFO] [stdout]    |     ----- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 60 -     Write(String),
[INFO] [stdout] 60 +     Write(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]    |     ----------- ^^^  ^^^  ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 61 -     ChangeColor(i32, i32, i32),
[INFO] [stdout] 61 +     ChangeColor((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel` and `Dime` are never constructed
[INFO] [stdout]    --> ch06-enums/src/main.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 126 |     Penny,
[INFO] [stdout] 127 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 128 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alabama` is never constructed
[INFO] [stdout]    --> ch06-enums/src/main.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 133 | enum UsState {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] 134 |     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] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `breaky` should have an upper camel case name
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub struct breaky {
[INFO] [stdout]    |                    ^^^^^^ help: convert the identifier to upper camel case: `Breaky`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 |     V4(u8, u8, u8, u8),
[INFO] [stdout]    |     -- ^^  ^^  ^^  ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddress` 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] 52 -     V4(u8, u8, u8, u8),
[INFO] [stdout] 52 +     V4((), (), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     V6(String),
[INFO] [stdout]    |     -- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddress` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 53 -     V6(String),
[INFO] [stdout] 53 +     V6(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:59:12
[INFO] [stdout]    |
[INFO] [stdout] 59 |     Move { x: i32, y: i32 },
[INFO] [stdout]    |     ----   ^       ^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:60:11
[INFO] [stdout]    |
[INFO] [stdout] 60 |     Write(String),
[INFO] [stdout]    |     ----- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 60 -     Write(String),
[INFO] [stdout] 60 +     Write(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> ch06-enums/src/main.rs:61:17
[INFO] [stdout]    |
[INFO] [stdout] 61 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]    |     ----------- ^^^  ^^^  ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 61 -     ChangeColor(i32, i32, i32),
[INFO] [stdout] 61 +     ChangeColor((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel` and `Dime` are never constructed
[INFO] [stdout]    --> ch06-enums/src/main.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 125 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 126 |     Penny,
[INFO] [stdout] 127 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 128 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alabama` is never constructed
[INFO] [stdout]    --> ch06-enums/src/main.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 133 | enum UsState {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] 134 |     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] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eat` is never used
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn eat() {
[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 `breaky` is never constructed
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:20:20
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub struct breaky {
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `make` is never used
[INFO] [stdout]   --> ch07-modules-packages/src/lib.rs:26:20
[INFO] [stdout]    |
[INFO] [stdout] 25 |         impl breaky {
[INFO] [stdout]    |         ----------- associated function in this implementation
[INFO] [stdout] 26 |             pub fn make(bread: &str) -> breaky {
[INFO] [stdout]    |                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `child` are never read
[INFO] [stdout]  --> ch15-reference-cycles/src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 7 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 8 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 9 |     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: type alias `Thunk` is never used
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:333:10
[INFO] [stdout]     |
[INFO] [stdout] 333 |     type Thunk = Box<dyn Fn() + Send + 'static>;
[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 `takes_long_type` is never used
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:335:8
[INFO] [stdout]     |
[INFO] [stdout] 335 |     fn takes_long_type(_f: Thunk) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Result` is never used
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:339:10
[INFO] [stdout]     |
[INFO] [stdout] 339 |     type Result<T> = std::result::Result<T, std::io::Error>;
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> ch20-advanced-features/src/main.rs:416:19
[INFO] [stdout]     |
[INFO] [stdout] 416 |     struct Status(i32);
[INFO] [stdout]     |            ------ ^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `Status` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] running `Command { std: "docker" "inspect" "f171e182cc4e15db8cdb91a7abf546d9bc4d9f3b73c13d928ea378aa1753ea7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f171e182cc4e15db8cdb91a7abf546d9bc4d9f3b73c13d928ea378aa1753ea7c", kill_on_drop: false }`
[INFO] [stdout] f171e182cc4e15db8cdb91a7abf546d9bc4d9f3b73c13d928ea378aa1753ea7c
