[INFO] cloning repository https://github.com/Delorus/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Delorus/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelorus%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelorus%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 85e9ac89dac5dca12156acf98619a6a7add91951
[INFO] checking Delorus/rust_learning against try#0c70cfbec949d241375e31c5a42066be70c720fc for pr-149681
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDelorus%2Frust_learning" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Delorus/rust_learning
[INFO] finished tweaking git repo https://github.com/Delorus/rust_learning
[INFO] tweaked toml for git repo https://github.com/Delorus/rust_learning written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Delorus/rust_learning on toolchain 0c70cfbec949d241375e31c5a42066be70c720fc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Delorus/rust_learning 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" "+0c70cfbec949d241375e31c5a42066be70c720fc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51852f782edaa6efe750710bc5f30f67bc5d03264e02ac5d0a8fa9fbd92d968d
[INFO] running `Command { std: "docker" "start" "-a" "51852f782edaa6efe750710bc5f30f67bc5d03264e02ac5d0a8fa9fbd92d968d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51852f782edaa6efe750710bc5f30f67bc5d03264e02ac5d0a8fa9fbd92d968d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51852f782edaa6efe750710bc5f30f67bc5d03264e02ac5d0a8fa9fbd92d968d", kill_on_drop: false }`
[INFO] [stdout] 51852f782edaa6efe750710bc5f30f67bc5d03264e02ac5d0a8fa9fbd92d968d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0c70cfbec949d241375e31c5a42066be70c720fc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c8cdd6eb88e7b18a6eaa60df936003d4e40f57d81ba1cab85446c6bb73fd11a
[INFO] running `Command { std: "docker" "start" "-a" "6c8cdd6eb88e7b18a6eaa60df936003d4e40f57d81ba1cab85446c6bb73fd11a", kill_on_drop: false }`
[INFO] [stderr]     Checking learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `return_value` is never used
[INFO] [stdout]  --> src/bin/functions.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn return_value() -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `not_return_value` is never used
[INFO] [stdout]   --> src/bin/functions.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn not_return_value() -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Debug`
[INFO] [stdout]  --> src/bin/traits.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Debug, Display};
[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::rc::Rc`
[INFO] [stdout]  --> src/bin/multithreads.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tweet` is never constructed
[INFO] [stdout]  --> src/bin/traits.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Tweet {
[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 `NewsArticle` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct NewsArticle {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tweet_summ` is never used
[INFO] [stdout]   --> src/bin/traits.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn tweet_summ() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/bin/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 59 |     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/traits.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 65 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Draw` is never used
[INFO] [stdout]   --> src/bin/traits.rs:74:7
[INFO] [stdout]    |
[INFO] [stdout] 74 | trait Draw {
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Screen` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct Screen {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/bin/traits.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl Screen {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 83 |     fn run(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Button` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct Button {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `use_trait_object` is never used
[INFO] [stdout]    --> src/bin/traits.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn use_trait_object() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `square` is never used
[INFO] [stdout]   --> src/bin/methods.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Rectangle {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 12 |     fn square(size: u32) -> Rectangle {
[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 `can_hold` is never used
[INFO] [stdout]   --> src/bin/methods.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 34 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/state_pattern.rs:47:41
[INFO] [stdout]    |
[INFO] [stdout] 47 |         pub fn request_preview(self) -> PendingReviewPost {
[INFO] [stdout]    |                ---------------          ^^^^^^^^^^^^^^^^^ expected `PendingReviewPost`, found `()`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_new_thread` is never used
[INFO] [stdout]   --> src/bin/multithreads.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn create_new_thread() {
[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 `wait_new_thread` is never used
[INFO] [stdout]   --> src/bin/multithreads.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn wait_new_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_closure_with_new_thread` is never used
[INFO] [stdout]   --> src/bin/multithreads.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn move_closure_with_new_thread() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_channel` is never used
[INFO] [stdout]   --> src/bin/multithreads.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn create_channel() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sending_multiple_values_in_channels` is never used
[INFO] [stdout]   --> src/bin/multithreads.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn sending_multiple_values_in_channels() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mutex` is never used
[INFO] [stdout]   --> src/bin/multithreads.rs:87:4
[INFO] [stdout]    |
[INFO] [stdout] 87 | fn mutex() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learning` (bin "state_pattern") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/multithreads.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let _ = handle.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/multithreads.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     handle.join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = handle.join();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/state_pattern.rs:47:41
[INFO] [stdout]    |
[INFO] [stdout] 47 |         pub fn request_preview(self) -> PendingReviewPost {
[INFO] [stdout]    |                ---------------          ^^^^^^^^^^^^^^^^^ expected `PendingReviewPost`, found `()`
[INFO] [stdout]    |                |
[INFO] [stdout]    |                implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Debug`
[INFO] [stdout]  --> src/bin/traits.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Debug, Display};
[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 variable: `int`
[INFO] [stdout]   --> src/bin/generics.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let int = Point {
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_int`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `float`
[INFO] [stdout]   --> src/bin/generics.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let float = Point {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/generics.rs:59:20
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                    ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/bin/generics.rs:59:26
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]  --> src/bin/generics.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn largest<T: PartialOrd + Copy>(list: &[T]) -> 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: field `y` is never read
[INFO] [stdout]   --> src/bin/generics.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Point<T> {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 22 |     x: T,
[INFO] [stdout] 23 |     y: T,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[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: method `x` is never used
[INFO] [stdout]   --> src/bin/generics.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 27 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_generic_point` is never used
[INFO] [stdout]   --> src/bin/generics.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn create_generic_point() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_func` is never used
[INFO] [stdout]   --> src/bin/generics.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/bin/patterns.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 |         1...5 => println!("one through five"),
[INFO] [stdout]    |          ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/bin/patterns.rs:121:45
[INFO] [stdout]     |
[INFO] [stdout] 121 |         Message::Hello { id: id_variable @ 3...7 } => {
[INFO] [stdout]     |                                             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/bin/patterns.rs:124:32
[INFO] [stdout]     |
[INFO] [stdout] 124 |         Message::Hello { id: 10...12 } => {
[INFO] [stdout]     |                                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/smart_ptr_cycle.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 |     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]    = 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] 11 -     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout] 11 +     Cons((), RefCell<Rc<List>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/bin/smart_ptr_cycle.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Node {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `weak_ref_cycle` is never used
[INFO] [stdout]   --> src/bin/smart_ptr_cycle.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn weak_ref_cycle() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learning` (bin "state_pattern" test) due to 1 previous error
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     let mut z = &mut x;
[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: unused variable: `y`
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let y = &x;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_string` is never used
[INFO] [stdout]  --> src/bin/borrow_checker_ref_and_copy.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn change_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: function `move_string_borrowed` is never used
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn move_string_borrowed() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_ownership` is never used
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn move_ownership() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_ownership` is never used
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn takes_ownership(s: String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_ownership` is never used
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn return_ownership() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_ownership_via_ref` is never used
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn return_ownership_via_ref() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ref_and_ownership` is never used
[INFO] [stdout]   --> src/bin/borrow_checker_ref_and_copy.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn ref_and_ownership() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tweet` is never constructed
[INFO] [stdout]  --> src/bin/traits.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Tweet {
[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 `or_match` is never used
[INFO] [stdout]  --> src/bin/patterns.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn or_match() {
[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 `range_match` is never used
[INFO] [stdout]   --> src/bin/patterns.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn range_match() {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `destruct` is never used
[INFO] [stdout]   --> src/bin/patterns.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn destruct() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> src/bin/patterns.rs:51:6
[INFO] [stdout]    |
[INFO] [stdout] 51 | enum Message {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `destruct_enum` is never used
[INFO] [stdout]   --> src/bin/patterns.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn destruct_enum() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ignore_several_value` is never used
[INFO] [stdout]   --> src/bin/patterns.rs:81:4
[INFO] [stdout]    |
[INFO] [stdout] 81 | fn ignore_several_value() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_guard` is never used
[INFO] [stdout]    --> src/bin/patterns.rs:103:4
[INFO] [stdout]     |
[INFO] [stdout] 103 | fn match_guard() {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `binding_in_match` is never used
[INFO] [stdout]    --> src/bin/patterns.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn binding_in_match() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NewsArticle` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct NewsArticle {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `tweet_summ` is never used
[INFO] [stdout]   --> src/bin/traits.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn tweet_summ() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/bin/traits.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 59 |     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/traits.rs:65:8
[INFO] [stdout]    |
[INFO] [stdout] 64 | impl<T: Display + PartialOrd> Pair<T> {
[INFO] [stdout]    | ------------------------------------- method in this implementation
[INFO] [stdout] 65 |     fn cmp_display(&self) {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Draw` is never used
[INFO] [stdout]   --> src/bin/traits.rs:74:7
[INFO] [stdout]    |
[INFO] [stdout] 74 | trait Draw {
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Screen` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct Screen {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/bin/traits.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | impl Screen {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 83 |     fn run(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Button` is never constructed
[INFO] [stdout]   --> src/bin/traits.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct Button {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `use_trait_object` is never used
[INFO] [stdout]    --> src/bin/traits.rs:102:4
[INFO] [stdout]     |
[INFO] [stdout] 102 | fn use_trait_object() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `override_plus` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn override_plus() {
[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 `Millimeters` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Millimeters(u32);
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Meters` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Meters(u32);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Pilot` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 | trait Pilot {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Wizard` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:48:7
[INFO] [stdout]    |
[INFO] [stdout] 48 | trait Wizard {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Human` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Human;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `fly` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Human {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 67 |     fn fly(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `several_realisation` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn several_realisation() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:79:7
[INFO] [stdout]    |
[INFO] [stdout] 79 | trait Animal {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | struct Dog;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `baby_name` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl Dog {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 86 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `several_static_realisation` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn several_static_realisation() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]    --> src/bin/adv_traits.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 | struct Wrapper(Vec<String>);
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `newtype` is never used
[INFO] [stdout]    --> src/bin/adv_traits.rs:142:4
[INFO] [stdout]     |
[INFO] [stdout] 142 | fn newtype() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `total`
[INFO] [stdout]   --> src/bin/iterators.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let total: i32 = v_iter.sum();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_total`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `int`
[INFO] [stdout]   --> src/bin/generics.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let int = Point {
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_int`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `float`
[INFO] [stdout]   --> src/bin/generics.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let float = Point {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iter_terminated` is never used
[INFO] [stdout]  --> src/bin/iterators.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn iter_terminated() {
[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: `t`
[INFO] [stdout]   --> src/bin/generics.rs:59:20
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                    ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u`
[INFO] [stdout]   --> src/bin/generics.rs:59:26
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_u`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]  --> src/bin/generics.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn largest<T: PartialOrd + Copy>(list: &[T]) -> 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: field `y` is never read
[INFO] [stdout]   --> src/bin/generics.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Point<T> {
[INFO] [stdout]    |        ----- field in this struct
[INFO] [stdout] 22 |     x: T,
[INFO] [stdout] 23 |     y: T,
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[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: method `x` is never used
[INFO] [stdout]   --> src/bin/generics.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 27 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_generic_point` is never used
[INFO] [stdout]   --> src/bin/generics.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn create_generic_point() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `some_func` is never used
[INFO] [stdout]   --> src/bin/generics.rs:59:4
[INFO] [stdout]    |
[INFO] [stdout] 59 | fn some_func<T, U>(t: T, u: U) -> i32
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iter_adaptors` is never used
[INFO] [stdout]   --> src/bin/iterators.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn iter_adaptors() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/smart_ptr_cycle.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 |     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]    = 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] 11 -     Cons(i32, RefCell<Rc<List>>),
[INFO] [stdout] 11 +     Cons((), RefCell<Rc<List>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]   --> src/bin/smart_ptr_cycle.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Node {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `weak_ref_cycle` is never used
[INFO] [stdout]   --> src/bin/smart_ptr_cycle.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn weak_ref_cycle() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `override_plus` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn override_plus() {
[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 `Millimeters` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Millimeters(u32);
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Meters` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Meters(u32);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Pilot` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 | trait Pilot {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Wizard` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:48:7
[INFO] [stdout]    |
[INFO] [stdout] 48 | trait Wizard {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Human` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | struct Human;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `fly` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Human {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] 67 |     fn fly(&self) {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `several_realisation` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn several_realisation() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Animal` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:79:7
[INFO] [stdout]    |
[INFO] [stdout] 79 | trait Animal {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Dog` is never constructed
[INFO] [stdout]   --> src/bin/adv_traits.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 | struct Dog;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `baby_name` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | impl Dog {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 86 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `several_static_realisation` is never used
[INFO] [stdout]   --> src/bin/adv_traits.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn several_static_realisation() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Wrapper` is never constructed
[INFO] [stdout]    --> src/bin/adv_traits.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 | struct Wrapper(Vec<String>);
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `newtype` is never used
[INFO] [stdout]    --> src/bin/adv_traits.rs:142:4
[INFO] [stdout]     |
[INFO] [stdout] 142 | fn newtype() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6c8cdd6eb88e7b18a6eaa60df936003d4e40f57d81ba1cab85446c6bb73fd11a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c8cdd6eb88e7b18a6eaa60df936003d4e40f57d81ba1cab85446c6bb73fd11a", kill_on_drop: false }`
[INFO] [stdout] 6c8cdd6eb88e7b18a6eaa60df936003d4e40f57d81ba1cab85446c6bb73fd11a
