[INFO] cloning repository https://github.com/linmingjie1/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/linmingjie1/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinmingjie1%2Frust-learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinmingjie1%2Frust-learning'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 3a7d5ae92c777a47745d4a58310c5f2941666978 [INFO] checking linmingjie1/rust-learning against try#88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c for pr-154887 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flinmingjie1%2Frust-learning" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] removed /workspace/builds/worker-2-tc2/source/.cargo/config.toml [INFO] removed /workspace/builds/worker-2-tc2/source/rust-toolchain.toml [INFO] started tweaking git repo https://github.com/linmingjie1/rust-learning [INFO] finished tweaking git repo https://github.com/linmingjie1/rust-learning [INFO] tweaked toml for git repo https://github.com/linmingjie1/rust-learning written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/linmingjie1/rust-learning on toolchain 88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/linmingjie1/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" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded rand_core v0.10.0 [INFO] [stderr] Downloaded unicode-ident v1.0.23 [INFO] [stderr] Downloaded cpufeatures v0.3.0 [INFO] [stderr] Downloaded quote v1.0.44 [INFO] [stderr] Downloaded rand v0.10.0 [INFO] [stderr] Downloaded chacha20 v0.10.0 [INFO] [stderr] Downloaded getrandom v0.4.1 [INFO] [stderr] Downloaded anyhow v1.0.101 [INFO] [stderr] Downloaded syn v2.0.115 [INFO] [stderr] Downloaded libc v0.2.182 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 6ed8362ebfcc860f4bfef0f0dc6949e36f23209b066215caf3e74baf07019728 [INFO] running `Command { std: "docker" "start" "-a" "6ed8362ebfcc860f4bfef0f0dc6949e36f23209b066215caf3e74baf07019728", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "6ed8362ebfcc860f4bfef0f0dc6949e36f23209b066215caf3e74baf07019728", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6ed8362ebfcc860f4bfef0f0dc6949e36f23209b066215caf3e74baf07019728", kill_on_drop: false }` [INFO] [stdout] 6ed8362ebfcc860f4bfef0f0dc6949e36f23209b066215caf3e74baf07019728 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d5d4d80e77fd48388b6ae8bf7b206c805981792ed084b650c34e0515c535d31c [INFO] running `Command { std: "docker" "start" "-a" "d5d4d80e77fd48388b6ae8bf7b206c805981792ed084b650c34e0515c535d31c", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.106 [INFO] [stderr] Compiling quote v1.0.44 [INFO] [stderr] Compiling libc v0.2.182 [INFO] [stderr] Compiling unicode-ident v1.0.23 [INFO] [stderr] Checking rand_core v0.10.0 [INFO] [stderr] Compiling getrandom v0.4.1 [INFO] [stderr] Checking cpufeatures v0.3.0 [INFO] [stderr] Checking hello_macro v0.1.0 (/opt/rustwide/workdir/hello_macro) [INFO] [stderr] Checking chacha20 v0.10.0 [INFO] [stderr] Compiling syn v2.0.115 [INFO] [stderr] Checking rand v0.10.0 [INFO] [stderr] Checking hello_macro_derive v0.1.0 (/opt/rustwide/workdir/hello_macro_derive) [INFO] [stderr] Checking rust-tutorial v0.1.0 (/opt/rustwide/workdir/tutorial) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> tutorial/src/modules/vector.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let mut v = vec![1, 2, 3, 4, 5]; [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: `row` [INFO] [stdout] --> tutorial/src/modules/vector.rs:68:9 [INFO] [stdout] | [INFO] [stdout] 68 | let row = vec![ [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [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] --> tutorial/src/modules/string.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/string.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let s = "initial contents".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `data` [INFO] [stdout] --> tutorial/src/modules/string.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let data = s.as_str(); // 将 String 转换为 &str [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> tutorial/src/modules/string.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | let a: char = 'A'; // 4 字节 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `zh` [INFO] [stdout] --> tutorial/src/modules/string.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let zh: char = '中'; // 4 字节 [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_zh` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `emoji` [INFO] [stdout] --> tutorial/src/modules/string.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let emoji: char = '😀'; // 4 字节。在 Java 中，需两个 UTF-16 编码单元（代理对），字节数为 4 字节（2×2 字节） [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_emoji` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `scores` [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let scores: HashMap<_, _> = teams.iter().zip(initial_scores.iter()).collect(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_scores` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let f = File::open(file_path).unwrap(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let f = File::open(file_path).expect("Failed to open the file"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `integer` [INFO] [stdout] --> tutorial/src/modules/generics.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let integer = Point { x: 1, y: 2 }; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `float` [INFO] [stdout] --> tutorial/src/modules/generics.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let float = Point { x: 1.0, y: 2.0 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_float` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:69:62 [INFO] [stdout] | [INFO] [stdout] 69 | pub fn notify4(a: T, b: U) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:73:28 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn notify5(a: T, b: U) -> String [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:29 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:17 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:29 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:65:9 [INFO] [stdout] | [INFO] [stdout] 65 | let i = ImportantExcerpt { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:129:9 [INFO] [stdout] | [INFO] [stdout] 129 | let s: &'static str = "I have a static lifetime."; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `add_one_v1` [INFO] [stdout] --> tutorial/src/modules/closure.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let add_one_v1 = |x: i32| -> i32 { x + 1 }; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> tutorial/src/modules/vector.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let mut v = vec![1, 2, 3, 4, 5]; [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: `row` [INFO] [stdout] --> tutorial/src/modules/vector.rs:68:9 [INFO] [stdout] | [INFO] [stdout] 68 | let row = vec![ [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [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] --> tutorial/src/modules/string.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/string.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let s = "initial contents".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `data` [INFO] [stdout] --> tutorial/src/modules/string.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let data = s.as_str(); // 将 String 转换为 &str [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> tutorial/src/modules/string.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | let a: char = 'A'; // 4 字节 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `zh` [INFO] [stdout] --> tutorial/src/modules/string.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let zh: char = '中'; // 4 字节 [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_zh` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `emoji` [INFO] [stdout] --> tutorial/src/modules/string.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let emoji: char = '😀'; // 4 字节。在 Java 中，需两个 UTF-16 编码单元（代理对），字节数为 4 字节（2×2 字节） [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_emoji` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `scores` [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let scores: HashMap<_, _> = teams.iter().zip(initial_scores.iter()).collect(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_scores` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let f = File::open(file_path).unwrap(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let f = File::open(file_path).expect("Failed to open the file"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:14 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:32 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> tutorial/src/demo/guess.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn main() { [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 `test2` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `enum_vec` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:61:4 [INFO] [stdout] | [INFO] [stdout] 61 | fn enum_vec() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn example() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example2` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn example2() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `demo` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:25:4 [INFO] [stdout] | [INFO] [stdout] 25 | fn demo () { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn update() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update2` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn update2() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test1` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn test1() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file_short` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn read_username_from_file_short() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> tutorial/src/modules/generics.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 2 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 3 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 4 | y: T, [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Point { [INFO] [stdout] | ---------------- method in this implementation [INFO] [stdout] 8 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `y` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 12 | impl Point { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] 13 | fn y(&self) -> f32 { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Option` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:19:6 [INFO] [stdout] | [INFO] [stdout] 19 | enum Option { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Result` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:23:6 [INFO] [stdout] | [INFO] [stdout] 23 | enum Result { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:83:4 [INFO] [stdout] | [INFO] [stdout] 83 | fn largest(list: &[T]) -> T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_test` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn longest_test () { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest3` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn test_struct() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `integer` [INFO] [stdout] --> tutorial/src/modules/generics.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let integer = Point { x: 1, y: 2 }; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:84:4 [INFO] [stdout] | [INFO] [stdout] 84 | fn test_struct2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `float` [INFO] [stdout] --> tutorial/src/modules/generics.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let float = Point { x: 1.0, y: 2.0 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_float` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:112:8 [INFO] [stdout] | [INFO] [stdout] 109 | impl<'a> ImportantExcerpt<'a> { [INFO] [stdout] | ----------------------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 112 | fn level(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 116 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `static_lifetime` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:128:4 [INFO] [stdout] | [INFO] [stdout] 128 | fn static_lifetime() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_with_announcement` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:145:4 [INFO] [stdout] | [INFO] [stdout] 145 | fn longest_with_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Guess` is never constructed [INFO] [stdout] --> tutorial/src/modules/test.rs:19:8 [INFO] [stdout] | [INFO] [stdout] 19 | struct Guess { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> tutorial/src/modules/test.rs:23:12 [INFO] [stdout] | [INFO] [stdout] 22 | impl Guess { [INFO] [stdout] | ---------- associated function in this implementation [INFO] [stdout] 23 | pub fn new(value: i32) -> Guess { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:69:62 [INFO] [stdout] | [INFO] [stdout] 69 | pub fn notify4(a: T, b: U) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:73:28 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn notify5(a: T, b: U) -> String [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:29 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:17 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:29 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:65:9 [INFO] [stdout] | [INFO] [stdout] 65 | let i = ImportantExcerpt { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:129:9 [INFO] [stdout] | [INFO] [stdout] 129 | let s: &'static str = "I have a static lifetime."; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `add_one_v1` [INFO] [stdout] --> tutorial/src/modules/closure.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let add_one_v1 = |x: i32| -> i32 { x + 1 }; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:14 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:32 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> tutorial/src/demo/guess.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn main() { [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 `test2` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `enum_vec` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:61:4 [INFO] [stdout] | [INFO] [stdout] 61 | fn enum_vec() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn example() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example2` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn example2() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `demo` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:25:4 [INFO] [stdout] | [INFO] [stdout] 25 | fn demo () { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn update() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update2` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn update2() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test1` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn test1() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file_short` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn read_username_from_file_short() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> tutorial/src/modules/generics.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 2 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 3 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 4 | y: T, [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Point { [INFO] [stdout] | ---------------- method in this implementation [INFO] [stdout] 8 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `y` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 12 | impl Point { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] 13 | fn y(&self) -> f32 { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Option` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:19:6 [INFO] [stdout] | [INFO] [stdout] 19 | enum Option { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Result` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:23:6 [INFO] [stdout] | [INFO] [stdout] 23 | enum Result { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:83:4 [INFO] [stdout] | [INFO] [stdout] 83 | fn largest(list: &[T]) -> T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_test` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn longest_test () { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest3` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn test_struct() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:84:4 [INFO] [stdout] | [INFO] [stdout] 84 | fn test_struct2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:112:8 [INFO] [stdout] | [INFO] [stdout] 109 | impl<'a> ImportantExcerpt<'a> { [INFO] [stdout] | ----------------------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 112 | fn level(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 116 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `static_lifetime` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:128:4 [INFO] [stdout] | [INFO] [stdout] 128 | fn static_lifetime() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_with_announcement` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:145:4 [INFO] [stdout] | [INFO] [stdout] 145 | fn longest_with_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> tutorial/src/modules/test.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | struct Guess { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] 20 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `PrimaryColor` and `SecondaryColor` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:1:23 [INFO] [stdout] | [INFO] [stdout] 1 | pub use self::kinds::{PrimaryColor, SecondaryColor}; [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: `self::utils::mix` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | pub use self::utils::mix; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `RefMut` and `Ref` [INFO] [stdout] --> tutorial/src/advances/refcell.rs:10:17 [INFO] [stdout] | [INFO] [stdout] 10 | use std::cell::{Ref, RefCell, RefMut}; [INFO] [stdout] | ^^^ ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::ops::Deref` [INFO] [stdout] --> tutorial/src/advances/refcell.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | use std::ops::Deref; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `PrimaryColor` and `SecondaryColor` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:1:23 [INFO] [stdout] | [INFO] [stdout] 1 | pub use self::kinds::{PrimaryColor, SecondaryColor}; [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: `self::utils::mix` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | pub use self::utils::mix; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `RefMut` and `Ref` [INFO] [stdout] --> tutorial/src/advances/refcell.rs:10:17 [INFO] [stdout] | [INFO] [stdout] 10 | use std::cell::{Ref, RefCell, RefMut}; [INFO] [stdout] | ^^^ ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::ops::Deref` [INFO] [stdout] --> tutorial/src/advances/refcell.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 11 | use std::ops::Deref; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> tutorial/src/modules/vector.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let mut v = vec![1, 2, 3, 4, 5]; [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: `row` [INFO] [stdout] --> tutorial/src/modules/vector.rs:68:9 [INFO] [stdout] | [INFO] [stdout] 68 | let row = vec![ [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [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] --> tutorial/src/modules/string.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/string.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let s = "initial contents".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `data` [INFO] [stdout] --> tutorial/src/modules/string.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let data = s.as_str(); // 将 String 转换为 &str [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> tutorial/src/modules/string.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | let a: char = 'A'; // 4 字节 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `zh` [INFO] [stdout] --> tutorial/src/modules/string.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let zh: char = '中'; // 4 字节 [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_zh` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `emoji` [INFO] [stdout] --> tutorial/src/modules/string.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let emoji: char = '😀'; // 4 字节。在 Java 中，需两个 UTF-16 编码单元（代理对），字节数为 4 字节（2×2 字节） [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_emoji` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `scores` [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let scores: HashMap<_, _> = teams.iter().zip(initial_scores.iter()).collect(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_scores` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let f = File::open(file_path).unwrap(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let f = File::open(file_path).expect("Failed to open the file"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `integer` [INFO] [stdout] --> tutorial/src/modules/generics.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let integer = Point { x: 1, y: 2 }; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `float` [INFO] [stdout] --> tutorial/src/modules/generics.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let float = Point { x: 1.0, y: 2.0 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_float` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:69:62 [INFO] [stdout] | [INFO] [stdout] 69 | pub fn notify4(a: T, b: U) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:73:28 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn notify5(a: T, b: U) -> String [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:29 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:17 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:29 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:65:9 [INFO] [stdout] | [INFO] [stdout] 65 | let i = ImportantExcerpt { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:129:9 [INFO] [stdout] | [INFO] [stdout] 129 | let s: &'static str = "I have a static lifetime."; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `add_one_v1` [INFO] [stdout] --> tutorial/src/modules/closure.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let add_one_v1 = |x: i32| -> i32 { x + 1 }; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:14 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:32 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `d` [INFO] [stdout] --> tutorial/src/advances/drop.rs:27:9 [INFO] [stdout] | [INFO] [stdout] 27 | let d = CustomSmartPointer { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_d` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | let b = BoxCons(3, Box::new(a)); // a 转移所有权 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let b = RcCons(3, Rc::clone(&a)); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | let c = RcCons(4, Rc::clone(&a)); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/advances/refcell.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let x = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> tutorial/src/modules/vector.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let mut v = vec![1, 2, 3, 4, 5]; [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: `row` [INFO] [stdout] --> tutorial/src/modules/vector.rs:68:9 [INFO] [stdout] | [INFO] [stdout] 68 | let row = vec![ [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [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] --> tutorial/src/modules/string.rs:45:9 [INFO] [stdout] | [INFO] [stdout] 45 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/string.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let s = "initial contents".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `data` [INFO] [stdout] --> tutorial/src/modules/string.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let data = s.as_str(); // 将 String 转换为 &str [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> tutorial/src/modules/string.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | let a: char = 'A'; // 4 字节 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `zh` [INFO] [stdout] --> tutorial/src/modules/string.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 59 | let zh: char = '中'; // 4 字节 [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_zh` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `emoji` [INFO] [stdout] --> tutorial/src/modules/string.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let emoji: char = '😀'; // 4 字节。在 Java 中，需两个 UTF-16 编码单元（代理对），字节数为 4 字节（2×2 字节） [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_emoji` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `scores` [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let scores: HashMap<_, _> = teams.iter().zip(initial_scores.iter()).collect(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_scores` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `post` [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:53:31 [INFO] [stdout] | [INFO] [stdout] 53 | fn content<'a>(&self, post: &'a Post) -> &'a str { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_post` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let f = File::open(file_path).unwrap(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let f = File::open(file_path).expect("Failed to open the file"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:83:17 [INFO] [stdout] | [INFO] [stdout] 83 | if let Some(x) = a {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `integer` [INFO] [stdout] --> tutorial/src/modules/generics.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let integer = Point { x: 1, y: 2 }; [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_integer` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `float` [INFO] [stdout] --> tutorial/src/modules/generics.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | let float = Point { x: 1.0, y: 2.0 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_float` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:69:62 [INFO] [stdout] | [INFO] [stdout] 69 | pub fn notify4(a: T, b: U) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `setting_value` is never read [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:219:13 [INFO] [stdout] | [INFO] [stdout] 219 | setting_value = new_setting_value; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:73:28 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn notify5(a: T, b: U) -> String [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary `unsafe` block [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:43:5 [INFO] [stdout] | [INFO] [stdout] 43 | unsafe { [INFO] [stdout] | ^^^^^^ unnecessary `unsafe` block [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:29 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r` [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:42:9 [INFO] [stdout] | [INFO] [stdout] 42 | let r = address as *const i32; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_r` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:17 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:29 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:65:9 [INFO] [stdout] | [INFO] [stdout] 65 | let i = ImportantExcerpt { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:129:9 [INFO] [stdout] | [INFO] [stdout] 129 | let s: &'static str = "I have a static lifetime."; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `add_one_v1` [INFO] [stdout] --> tutorial/src/modules/closure.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let add_one_v1 = |x: i32| -> i32 { x + 1 }; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:33:9 [INFO] [stdout] | [INFO] [stdout] 33 | let f: Thunk = Box::new(|| println!("hello")); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:28:24 [INFO] [stdout] | [INFO] [stdout] 28 | fn takes_long_type(f: Thunk) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:48:16 [INFO] [stdout] | [INFO] [stdout] 48 | fn generic1(t: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:49:23 [INFO] [stdout] | [INFO] [stdout] 49 | fn generic2(t: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:51:24 [INFO] [stdout] | [INFO] [stdout] 51 | fn generic3(t: &T) {} // 表示 T 是一个动态大小类型 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `val` [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | let val = Status::Value(1); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_val` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `list_of_statuses` [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | let list_of_statuses: Vec = (0u32..20).map(Status::Value).collect(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statuses` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> tutorial/src/demo/guess.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn main() { [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 `test` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test2` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `travel_vec` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:45:4 [INFO] [stdout] | [INFO] [stdout] 45 | fn travel_vec() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `enum_vec` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:61:4 [INFO] [stdout] | [INFO] [stdout] 61 | fn enum_vec() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn example() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example2` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn example2() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `append_example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:90:4 [INFO] [stdout] | [INFO] [stdout] 90 | fn append_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `for_example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn for_example() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `demo` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:25:4 [INFO] [stdout] | [INFO] [stdout] 25 | fn demo () { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn update() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update2` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn update2() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test1` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn test1() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `result_example` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn result_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file_short` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn read_username_from_file_short() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file_short2` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:80:4 [INFO] [stdout] | [INFO] [stdout] 80 | fn read_username_from_file_short2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Guess` is never constructed [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:87:12 [INFO] [stdout] | [INFO] [stdout] 87 | pub struct Guess { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `value` are never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:91:12 [INFO] [stdout] | [INFO] [stdout] 90 | impl Guess { [INFO] [stdout] | ---------- associated items in this implementation [INFO] [stdout] 91 | pub fn new(value: i32) -> Guess { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 97 | pub fn value(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/code_extract.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> tutorial/src/modules/code_extract.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn largest(list: &[i32]) -> i32 { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest_demo` is never used [INFO] [stdout] --> tutorial/src/modules/code_extract.rs:25:4 [INFO] [stdout] | [INFO] [stdout] 25 | fn largest_demo (list: &[i32]) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> tutorial/src/modules/generics.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 2 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Point { [INFO] [stdout] | ---------------- method in this implementation [INFO] [stdout] 8 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `y` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 12 | impl Point { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] 13 | fn y(&self) -> f32 { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Option` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:19:6 [INFO] [stdout] | [INFO] [stdout] 19 | enum Option { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Result` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:23:6 [INFO] [stdout] | [INFO] [stdout] 23 | enum Result { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Summary` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | pub trait Summary { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `NewArticle` is never constructed [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:10:12 [INFO] [stdout] | [INFO] [stdout] 10 | pub struct NewArticle { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Tweet` is never constructed [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:23:12 [INFO] [stdout] | [INFO] [stdout] 23 | pub struct Tweet { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:36:8 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:49:8 [INFO] [stdout] | [INFO] [stdout] 49 | pub fn notify(item: &impl Summary) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify1` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:52:8 [INFO] [stdout] | [INFO] [stdout] 52 | pub fn notify1(item: impl Summary + Display) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify2` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 59 | pub fn notify2(item: T) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify3` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:62:8 [INFO] [stdout] | [INFO] [stdout] 62 | pub fn notify3(item: T) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify4` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:69:8 [INFO] [stdout] | [INFO] [stdout] 69 | pub fn notify4(a: T, b: U) -> String { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify5` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:73:8 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn notify5(a: T, b: U) -> String [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:83:4 [INFO] [stdout] | [INFO] [stdout] 83 | fn largest(list: &[T]) -> T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_test` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn longest_test () { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest3` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:51:8 [INFO] [stdout] | [INFO] [stdout] 51 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 59 | struct ImportantExcerpt<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn test_struct() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:84:4 [INFO] [stdout] | [INFO] [stdout] 84 | fn test_struct2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:112:8 [INFO] [stdout] | [INFO] [stdout] 109 | impl<'a> ImportantExcerpt<'a> { [INFO] [stdout] | ----------------------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 112 | fn level(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 116 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `static_lifetime` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:128:4 [INFO] [stdout] | [INFO] [stdout] 128 | fn static_lifetime() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_with_announcement` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:145:4 [INFO] [stdout] | [INFO] [stdout] 145 | fn longest_with_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/modules/test.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn run() {} [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Rectangle` is never constructed [INFO] [stdout] --> tutorial/src/modules/test.rs:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | pub struct Rectangle { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `area` is never used [INFO] [stdout] --> tutorial/src/modules/test.rs:10:12 [INFO] [stdout] | [INFO] [stdout] 9 | impl Rectangle { [INFO] [stdout] | -------------- method in this implementation [INFO] [stdout] 10 | pub fn area(&self) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greeting` is never used [INFO] [stdout] --> tutorial/src/modules/test.rs:15:8 [INFO] [stdout] | [INFO] [stdout] 15 | pub fn greeting(name: &str) -> String { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Guess` is never constructed [INFO] [stdout] --> tutorial/src/modules/test.rs:19:8 [INFO] [stdout] | [INFO] [stdout] 19 | struct Guess { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> tutorial/src/modules/test.rs:23:12 [INFO] [stdout] | [INFO] [stdout] 22 | impl Guess { [INFO] [stdout] | ---------- associated function in this implementation [INFO] [stdout] 23 | pub fn new(value: i32) -> Guess { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Cacher` is never constructed [INFO] [stdout] --> tutorial/src/modules/closure.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 41 | struct Cacher [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `value` are never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:53:8 [INFO] [stdout] | [INFO] [stdout] 49 | / impl Cacher [INFO] [stdout] 50 | | where [INFO] [stdout] 51 | | T: Fn(u32) -> u32, [INFO] [stdout] | |______________________- associated items in this implementation [INFO] [stdout] 52 | { [INFO] [stdout] 53 | fn new(calculation: T) -> Cacher { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 60 | fn value(&mut self, arg: u32) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_fn` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:124:8 [INFO] [stdout] | [INFO] [stdout] 124 | pub fn example_fn() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_fn_mut` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:134:8 [INFO] [stdout] | [INFO] [stdout] 134 | pub fn example_fn_mut() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_fn_once` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:147:8 [INFO] [stdout] | [INFO] [stdout] 147 | pub fn example_fn_once() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_move` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:166:4 [INFO] [stdout] | [INFO] [stdout] 166 | fn test_move() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_self_parameter` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:179:8 [INFO] [stdout] | [INFO] [stdout] 179 | pub fn example_self_parameter() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_practical_usage` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:222:8 [INFO] [stdout] | [INFO] [stdout] 222 | pub fn example_practical_usage() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `PrimaryColor` is never used [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | pub enum PrimaryColor { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `SecondaryColor` is never used [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:10:12 [INFO] [stdout] | [INFO] [stdout] 10 | pub enum SecondaryColor { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `mix` is never used [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:10 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Config` is never constructed [INFO] [stdout] --> tutorial/src/practice/args.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | struct Config { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> tutorial/src/practice/args.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 10 | impl Config { [INFO] [stdout] | ----------- associated function in this implementation [INFO] [stdout] 11 | fn new(args: &[OsString]) -> Result { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:14 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/practice/args.rs:31:8 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:32 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `search` is never used [INFO] [stdout] --> tutorial/src/practice/args.rs:70:8 [INFO] [stdout] | [INFO] [stdout] 70 | pub fn search<'a>(query: &str, content: &'a str) -> Vec<&'a str> { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `search_case_insensitive` is never used [INFO] [stdout] --> tutorial/src/practice/args.rs:75:8 [INFO] [stdout] | [INFO] [stdout] 75 | pub fn search_case_insensitive<'a>(query: &str, content: &'a str) -> Vec<&'a str> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:10:4 [INFO] [stdout] | [INFO] [stdout] 10 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `RefList` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:34:6 [INFO] [stdout] | [INFO] [stdout] 34 | enum RefList<'a> { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `traverse` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:39:6 [INFO] [stdout] | [INFO] [stdout] 38 | impl<'a> RefList<'a> { [INFO] [stdout] | -------------------- method in this implementation [INFO] [stdout] 39 | fn traverse(&self) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `BoxList` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:55:6 [INFO] [stdout] | [INFO] [stdout] 55 | enum BoxList { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `traverse` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:60:6 [INFO] [stdout] | [INFO] [stdout] 59 | impl BoxList { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 60 | fn traverse(&self) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 9 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `normal_deref` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn normal_deref() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `box_deref` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn box_deref() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MyBox` is never constructed [INFO] [stdout] --> tutorial/src/advances/deref.rs:38:8 [INFO] [stdout] | [INFO] [stdout] 38 | struct MyBox(T); // 元组结构体 [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 40 | impl MyBox { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 41 | fn new(x: T) -> MyBox { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_custom_deref` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn test_custom_deref() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_deref_coercion` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:66:4 [INFO] [stdout] | [INFO] [stdout] 66 | fn test_deref_coercion() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hello` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn hello(name: &str) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/drop.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed [INFO] [stdout] --> tutorial/src/advances/drop.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | struct CustomSmartPointer { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_drop` is never used [INFO] [stdout] --> tutorial/src/advances/drop.rs:22:4 [INFO] [stdout] | [INFO] [stdout] 22 | fn test_drop() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `BoxList` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:11:6 [INFO] [stdout] | [INFO] [stdout] 11 | enum BoxList { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `RcList` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:15:6 [INFO] [stdout] | [INFO] [stdout] 15 | enum RcList { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_rc` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:24:4 [INFO] [stdout] | [INFO] [stdout] 24 | fn test_rc() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> tutorial/src/advances/cycle_ref.rs:16:10 [INFO] [stdout] | [INFO] [stdout] 16 | Cons(i32, RefCell>), [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] 16 - Cons(i32, RefCell>), [INFO] [stdout] 16 + Cons((), RefCell>), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> tutorial/src/advances/cycle_ref.rs:61:5 [INFO] [stdout] | [INFO] [stdout] 60 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 61 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 62 | parent: RefCell>, [INFO] [stdout] 63 | children: RefCell>>, [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] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/thread.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 13 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_test` is never used [INFO] [stdout] --> tutorial/src/advances/thread.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn thread_test() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_test` is never used [INFO] [stdout] --> tutorial/src/advances/thread.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn move_test() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_channel` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn test_channel() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_channel1` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:23:4 [INFO] [stdout] | [INFO] [stdout] 23 | fn test_channel1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_clone_sender` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:45:4 [INFO] [stdout] | [INFO] [stdout] 45 | fn test_clone_sender() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Clone` is never used [INFO] [stdout] --> tutorial/src/advances/trait_object.rs:114:15 [INFO] [stdout] | [INFO] [stdout] 114 | pub trait Clone { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Screen` is never constructed [INFO] [stdout] --> tutorial/src/advances/trait_object.rs:117:16 [INFO] [stdout] | [INFO] [stdout] 117 | pub struct Screen { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_state_pattern` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:13:4 [INFO] [stdout] | [INFO] [stdout] 13 | fn test_state_pattern() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `add_text`, `content`, `request_review`, and `approve` are never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:19:16 [INFO] [stdout] | [INFO] [stdout] 18 | impl Post { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 19 | pub fn new() -> Post { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 26 | pub fn add_text(&mut self, text: &str) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 30 | pub fn content(&self) -> &str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 34 | pub fn request_review(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 40 | pub fn approve(&mut self) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_functional` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:109:4 [INFO] [stdout] | [INFO] [stdout] 109 | fn test_functional() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `content` are never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:117:16 [INFO] [stdout] | [INFO] [stdout] 116 | impl Post { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 117 | pub fn new() -> DraftPost { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 122 | pub fn content(&self) -> &str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `add_text` and `request_review` are never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:127:16 [INFO] [stdout] | [INFO] [stdout] 126 | impl DraftPost { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 127 | pub fn add_text(&mut self, text: &str) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 130 | pub fn request_review(self) -> PendingReviewPost { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `approve` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:140:16 [INFO] [stdout] | [INFO] [stdout] 139 | impl PendingReviewPost { [INFO] [stdout] | ---------------------- method in this implementation [INFO] [stdout] 140 | pub fn approve(self) -> Post { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_if_let` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn test_if_let() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_while_let` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn test_while_let() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_for` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:54:4 [INFO] [stdout] | [INFO] [stdout] 54 | fn test_for() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `print_coordinates` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:64:4 [INFO] [stdout] | [INFO] [stdout] 64 | fn print_coordinates(&(x, y): &(i32, i32)) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_function` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:67:4 [INFO] [stdout] | [INFO] [stdout] 67 | fn test_function() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_match` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn test_match() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_pattern_syntax` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn test_pattern_syntax() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_bind` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:283:4 [INFO] [stdout] | [INFO] [stdout] 283 | fn test_bind() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_raw_pointer` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:28:4 [INFO] [stdout] | [INFO] [stdout] 28 | fn test_raw_pointer() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangerous` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:51:11 [INFO] [stdout] | [INFO] [stdout] 51 | unsafe fn dangerous() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_unsafe_function` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:54:4 [INFO] [stdout] | [INFO] [stdout] 54 | fn test_unsafe_function() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_safe_abstraction` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:63:4 [INFO] [stdout] | [INFO] [stdout] 63 | fn test_safe_abstraction() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `split_at_mut` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:75:4 [INFO] [stdout] | [INFO] [stdout] 75 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_extern_function` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:96:4 [INFO] [stdout] | [INFO] [stdout] 96 | fn test_extern_function() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static `COUNTER` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:114:12 [INFO] [stdout] | [INFO] [stdout] 114 | static mut COUNTER: u32 = 0; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `add_to_count` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn add_to_count(inc: u32) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_mutable_static_variable` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:121:4 [INFO] [stdout] | [INFO] [stdout] 121 | fn test_mutable_static_variable() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Foo` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:136:14 [INFO] [stdout] | [INFO] [stdout] 136 | unsafe trait Foo { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_unsafe_trait` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:144:4 [INFO] [stdout] | [INFO] [stdout] 144 | fn test_unsafe_trait() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `abs` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | fn abs(input: i32) -> i32; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Iterator` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:15:11 [INFO] [stdout] | [INFO] [stdout] 15 | pub trait Iterator { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_generic` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn test_generic() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_associated_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn test_associated_type() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Millimeters` is never constructed [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:88:12 [INFO] [stdout] | [INFO] [stdout] 88 | struct Millimeters(u32); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Meters` is never constructed [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:89:12 [INFO] [stdout] | [INFO] [stdout] 89 | struct Meters(u32); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `OutlinePrint` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:161:11 [INFO] [stdout] | [INFO] [stdout] 161 | trait OutlinePrint: fmt::Display { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_long_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | fn takes_long_type(f: Thunk) {} [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `returns_long_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:29:8 [INFO] [stdout] | [INFO] [stdout] 29 | fn returns_long_type() -> Thunk { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_never_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:39:4 [INFO] [stdout] | [INFO] [stdout] 39 | fn test_never_type() -> ! { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generic1` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn generic1(t: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generic2` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:49:4 [INFO] [stdout] | [INFO] [stdout] 49 | fn generic2(t: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generic3` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn generic3(t: &T) {} // 表示 T 是一个动态大小类型 [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:40:15 [INFO] [stdout] | [INFO] [stdout] 40 | Value(u32), [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] 40 - Value(u32), [INFO] [stdout] 40 + Value(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Stop` is never constructed [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:41:9 [INFO] [stdout] | [INFO] [stdout] 39 | enum Status { [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] 40 | Value(u32), [INFO] [stdout] 41 | Stop, [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `return_closure` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:50:4 [INFO] [stdout] | [INFO] [stdout] 50 | fn return_closure() -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `d` [INFO] [stdout] --> tutorial/src/advances/drop.rs:27:9 [INFO] [stdout] | [INFO] [stdout] 27 | let d = CustomSmartPointer { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_d` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | let b = BoxCons(3, Box::new(a)); // a 转移所有权 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let b = RcCons(3, Rc::clone(&a)); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | let c = RcCons(4, Rc::clone(&a)); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/advances/refcell.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let x = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `post` [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:53:31 [INFO] [stdout] | [INFO] [stdout] 53 | fn content<'a>(&self, post: &'a Post) -> &'a str { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_post` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:83:17 [INFO] [stdout] | [INFO] [stdout] 83 | if let Some(x) = a {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `setting_value` is never read [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:219:13 [INFO] [stdout] | [INFO] [stdout] 219 | setting_value = new_setting_value; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary `unsafe` block [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:43:5 [INFO] [stdout] | [INFO] [stdout] 43 | unsafe { [INFO] [stdout] | ^^^^^^ unnecessary `unsafe` block [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_unsafe)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r` [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:42:9 [INFO] [stdout] | [INFO] [stdout] 42 | let r = address as *const i32; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_r` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:33:9 [INFO] [stdout] | [INFO] [stdout] 33 | let f: Thunk = Box::new(|| println!("hello")); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:28:24 [INFO] [stdout] | [INFO] [stdout] 28 | fn takes_long_type(f: Thunk) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:48:16 [INFO] [stdout] | [INFO] [stdout] 48 | fn generic1(t: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:49:23 [INFO] [stdout] | [INFO] [stdout] 49 | fn generic2(t: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:51:24 [INFO] [stdout] | [INFO] [stdout] 51 | fn generic3(t: &T) {} // 表示 T 是一个动态大小类型 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `val` [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | let val = Status::Value(1); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_val` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `list_of_statuses` [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | let list_of_statuses: Vec = (0u32..20).map(Status::Value).collect(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statuses` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> tutorial/src/demo/guess.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn main() { [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 `test` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test2` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `travel_vec` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:45:4 [INFO] [stdout] | [INFO] [stdout] 45 | fn travel_vec() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `enum_vec` is never used [INFO] [stdout] --> tutorial/src/modules/vector.rs:61:4 [INFO] [stdout] | [INFO] [stdout] 61 | fn enum_vec() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn example() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example2` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn example2() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `append_example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:90:4 [INFO] [stdout] | [INFO] [stdout] 90 | fn append_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `for_example` is never used [INFO] [stdout] --> tutorial/src/modules/string.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn for_example() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `demo` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:25:4 [INFO] [stdout] | [INFO] [stdout] 25 | fn demo () { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn update() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `update2` is never used [INFO] [stdout] --> tutorial/src/modules/hashmap.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn update2() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test1` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn test1() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `result_example` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn result_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file_short` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn read_username_from_file_short() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file_short2` is never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:80:4 [INFO] [stdout] | [INFO] [stdout] 80 | fn read_username_from_file_short2() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Guess` is never constructed [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:87:12 [INFO] [stdout] | [INFO] [stdout] 87 | pub struct Guess { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `value` are never used [INFO] [stdout] --> tutorial/src/modules/panic_test.rs:91:12 [INFO] [stdout] | [INFO] [stdout] 90 | impl Guess { [INFO] [stdout] | ---------- associated items in this implementation [INFO] [stdout] 91 | pub fn new(value: i32) -> Guess { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 97 | pub fn value(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/code_extract.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> tutorial/src/modules/code_extract.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn largest(list: &[i32]) -> i32 { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest_demo` is never used [INFO] [stdout] --> tutorial/src/modules/code_extract.rs:25:4 [INFO] [stdout] | [INFO] [stdout] 25 | fn largest_demo (list: &[i32]) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> tutorial/src/modules/generics.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 2 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 7 | impl Point { [INFO] [stdout] | ---------------- method in this implementation [INFO] [stdout] 8 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `y` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 12 | impl Point { [INFO] [stdout] | --------------- method in this implementation [INFO] [stdout] 13 | fn y(&self) -> f32 { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Option` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:19:6 [INFO] [stdout] | [INFO] [stdout] 19 | enum Option { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Result` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:23:6 [INFO] [stdout] | [INFO] [stdout] 23 | enum Result { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/generics.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Summary` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | pub trait Summary { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `NewArticle` is never constructed [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:10:12 [INFO] [stdout] | [INFO] [stdout] 10 | pub struct NewArticle { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Tweet` is never constructed [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:23:12 [INFO] [stdout] | [INFO] [stdout] 23 | pub struct Tweet { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:36:8 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:49:8 [INFO] [stdout] | [INFO] [stdout] 49 | pub fn notify(item: &impl Summary) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify1` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:52:8 [INFO] [stdout] | [INFO] [stdout] 52 | pub fn notify1(item: impl Summary + Display) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify2` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 59 | pub fn notify2(item: T) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify3` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:62:8 [INFO] [stdout] | [INFO] [stdout] 62 | pub fn notify3(item: T) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify4` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:69:8 [INFO] [stdout] | [INFO] [stdout] 69 | pub fn notify4(a: T, b: U) -> String { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify5` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:73:8 [INFO] [stdout] | [INFO] [stdout] 73 | pub fn notify5(a: T, b: U) -> String [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> tutorial/src/modules/trait_test.rs:83:4 [INFO] [stdout] | [INFO] [stdout] 83 | fn largest(list: &[T]) -> T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_test` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn longest_test () { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn longest2<'a>(x: &'a str, y: &str) -> &'a str { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest3` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn longest3<'a>(x: &'a str, y: &'a str) -> String { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:51:8 [INFO] [stdout] | [INFO] [stdout] 51 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 59 | struct ImportantExcerpt<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn test_struct() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_struct2` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:84:4 [INFO] [stdout] | [INFO] [stdout] 84 | fn test_struct2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `level` and `announce_and_return_part` are never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:112:8 [INFO] [stdout] | [INFO] [stdout] 109 | impl<'a> ImportantExcerpt<'a> { [INFO] [stdout] | ----------------------------- methods in this implementation [INFO] [stdout] ... [INFO] [stdout] 112 | fn level(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 116 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `static_lifetime` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:128:4 [INFO] [stdout] | [INFO] [stdout] 128 | fn static_lifetime() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_with_announcement` is never used [INFO] [stdout] --> tutorial/src/modules/lifecycle.rs:145:4 [INFO] [stdout] | [INFO] [stdout] 145 | fn longest_with_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/modules/test.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn run() {} [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `value` is never read [INFO] [stdout] --> tutorial/src/modules/test.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 19 | struct Guess { [INFO] [stdout] | ----- field in this struct [INFO] [stdout] 20 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | pub fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Cacher` is never constructed [INFO] [stdout] --> tutorial/src/modules/closure.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 41 | struct Cacher [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `value` are never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:53:8 [INFO] [stdout] | [INFO] [stdout] 49 | / impl Cacher [INFO] [stdout] 50 | | where [INFO] [stdout] 51 | | T: Fn(u32) -> u32, [INFO] [stdout] | |______________________- associated items in this implementation [INFO] [stdout] 52 | { [INFO] [stdout] 53 | fn new(calculation: T) -> Cacher { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 60 | fn value(&mut self, arg: u32) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_fn` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:124:8 [INFO] [stdout] | [INFO] [stdout] 124 | pub fn example_fn() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_fn_mut` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:134:8 [INFO] [stdout] | [INFO] [stdout] 134 | pub fn example_fn_mut() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_fn_once` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:147:8 [INFO] [stdout] | [INFO] [stdout] 147 | pub fn example_fn_once() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_move` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:166:4 [INFO] [stdout] | [INFO] [stdout] 166 | fn test_move() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_self_parameter` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:179:8 [INFO] [stdout] | [INFO] [stdout] 179 | pub fn example_self_parameter() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `example_practical_usage` is never used [INFO] [stdout] --> tutorial/src/modules/closure.rs:222:8 [INFO] [stdout] | [INFO] [stdout] 222 | pub fn example_practical_usage() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `PrimaryColor` is never used [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | pub enum PrimaryColor { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `SecondaryColor` is never used [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:10:12 [INFO] [stdout] | [INFO] [stdout] 10 | pub enum SecondaryColor { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `mix` is never used [INFO] [stdout] --> tutorial/src/modules/pub_use.rs:36:10 [INFO] [stdout] | [INFO] [stdout] 36 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `case_sensitive` is never read [INFO] [stdout] --> tutorial/src/practice/args.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 5 | struct Config { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] ... [INFO] [stdout] 8 | pub case_sensitive: bool, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/practice/args.rs:31:8 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:10:4 [INFO] [stdout] | [INFO] [stdout] 10 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `RefList` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:34:6 [INFO] [stdout] | [INFO] [stdout] 34 | enum RefList<'a> { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `traverse` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:39:6 [INFO] [stdout] | [INFO] [stdout] 38 | impl<'a> RefList<'a> { [INFO] [stdout] | -------------------- method in this implementation [INFO] [stdout] 39 | fn traverse(&self) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `BoxList` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:55:6 [INFO] [stdout] | [INFO] [stdout] 55 | enum BoxList { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `traverse` is never used [INFO] [stdout] --> tutorial/src/advances/box_test.rs:60:6 [INFO] [stdout] | [INFO] [stdout] 59 | impl BoxList { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 60 | fn traverse(&self) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 9 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `normal_deref` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn normal_deref() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `box_deref` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:27:4 [INFO] [stdout] | [INFO] [stdout] 27 | fn box_deref() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MyBox` is never constructed [INFO] [stdout] --> tutorial/src/advances/deref.rs:38:8 [INFO] [stdout] | [INFO] [stdout] 38 | struct MyBox(T); // 元组结构体 [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 40 | impl MyBox { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 41 | fn new(x: T) -> MyBox { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_custom_deref` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn test_custom_deref() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_deref_coercion` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:66:4 [INFO] [stdout] | [INFO] [stdout] 66 | fn test_deref_coercion() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hello` is never used [INFO] [stdout] --> tutorial/src/advances/deref.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn hello(name: &str) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/drop.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed [INFO] [stdout] --> tutorial/src/advances/drop.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 12 | struct CustomSmartPointer { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_drop` is never used [INFO] [stdout] --> tutorial/src/advances/drop.rs:22:4 [INFO] [stdout] | [INFO] [stdout] 22 | fn test_drop() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `BoxList` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:11:6 [INFO] [stdout] | [INFO] [stdout] 11 | enum BoxList { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `RcList` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:15:6 [INFO] [stdout] | [INFO] [stdout] 15 | enum RcList { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_rc` is never used [INFO] [stdout] --> tutorial/src/advances/rc_test.rs:24:4 [INFO] [stdout] | [INFO] [stdout] 24 | fn test_rc() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> tutorial/src/advances/cycle_ref.rs:16:10 [INFO] [stdout] | [INFO] [stdout] 16 | Cons(i32, RefCell>), [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] 16 - Cons(i32, RefCell>), [INFO] [stdout] 16 + Cons((), RefCell>), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> tutorial/src/advances/cycle_ref.rs:61:5 [INFO] [stdout] | [INFO] [stdout] 60 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 61 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 62 | parent: RefCell>, [INFO] [stdout] 63 | children: RefCell>>, [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] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/thread.rs:13:8 [INFO] [stdout] | [INFO] [stdout] 13 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_test` is never used [INFO] [stdout] --> tutorial/src/advances/thread.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn thread_test() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_test` is never used [INFO] [stdout] --> tutorial/src/advances/thread.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn move_test() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_channel` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn test_channel() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_channel1` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:23:4 [INFO] [stdout] | [INFO] [stdout] 23 | fn test_channel1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_clone_sender` is never used [INFO] [stdout] --> tutorial/src/advances/thread_msg.rs:45:4 [INFO] [stdout] | [INFO] [stdout] 45 | fn test_clone_sender() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Clone` is never used [INFO] [stdout] --> tutorial/src/advances/trait_object.rs:114:15 [INFO] [stdout] | [INFO] [stdout] 114 | pub trait Clone { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Screen` is never constructed [INFO] [stdout] --> tutorial/src/advances/trait_object.rs:117:16 [INFO] [stdout] | [INFO] [stdout] 117 | pub struct Screen { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_state_pattern` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:13:4 [INFO] [stdout] | [INFO] [stdout] 13 | fn test_state_pattern() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `add_text`, `content`, `request_review`, and `approve` are never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:19:16 [INFO] [stdout] | [INFO] [stdout] 18 | impl Post { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 19 | pub fn new() -> Post { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 26 | pub fn add_text(&mut self, text: &str) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 30 | pub fn content(&self) -> &str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 34 | pub fn request_review(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 40 | pub fn approve(&mut self) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_functional` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:109:4 [INFO] [stdout] | [INFO] [stdout] 109 | fn test_functional() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `content` are never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:117:16 [INFO] [stdout] | [INFO] [stdout] 116 | impl Post { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 117 | pub fn new() -> DraftPost { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 122 | pub fn content(&self) -> &str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `add_text` and `request_review` are never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:127:16 [INFO] [stdout] | [INFO] [stdout] 126 | impl DraftPost { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 127 | pub fn add_text(&mut self, text: &str) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 130 | pub fn request_review(self) -> PendingReviewPost { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `approve` is never used [INFO] [stdout] --> tutorial/src/advances/object_oriented.rs:140:16 [INFO] [stdout] | [INFO] [stdout] 139 | impl PendingReviewPost { [INFO] [stdout] | ---------------------- method in this implementation [INFO] [stdout] 140 | pub fn approve(self) -> Post { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:5:8 [INFO] [stdout] | [INFO] [stdout] 5 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_if_let` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn test_if_let() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_while_let` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn test_while_let() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_for` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:54:4 [INFO] [stdout] | [INFO] [stdout] 54 | fn test_for() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `print_coordinates` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:64:4 [INFO] [stdout] | [INFO] [stdout] 64 | fn print_coordinates(&(x, y): &(i32, i32)) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_function` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:67:4 [INFO] [stdout] | [INFO] [stdout] 67 | fn test_function() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_match` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn test_match() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_pattern_syntax` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn test_pattern_syntax() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_bind` is never used [INFO] [stdout] --> tutorial/src/advances/pattern_matching.rs:283:4 [INFO] [stdout] | [INFO] [stdout] 283 | fn test_bind() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_raw_pointer` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:28:4 [INFO] [stdout] | [INFO] [stdout] 28 | fn test_raw_pointer() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `dangerous` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:51:11 [INFO] [stdout] | [INFO] [stdout] 51 | unsafe fn dangerous() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_unsafe_function` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:54:4 [INFO] [stdout] | [INFO] [stdout] 54 | fn test_unsafe_function() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_safe_abstraction` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:63:4 [INFO] [stdout] | [INFO] [stdout] 63 | fn test_safe_abstraction() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `split_at_mut` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:75:4 [INFO] [stdout] | [INFO] [stdout] 75 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_extern_function` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:96:4 [INFO] [stdout] | [INFO] [stdout] 96 | fn test_extern_function() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static `COUNTER` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:114:12 [INFO] [stdout] | [INFO] [stdout] 114 | static mut COUNTER: u32 = 0; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `add_to_count` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn add_to_count(inc: u32) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_mutable_static_variable` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:121:4 [INFO] [stdout] | [INFO] [stdout] 121 | fn test_mutable_static_variable() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Foo` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:136:14 [INFO] [stdout] | [INFO] [stdout] 136 | unsafe trait Foo { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_unsafe_trait` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:144:4 [INFO] [stdout] | [INFO] [stdout] 144 | fn test_unsafe_trait() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `abs` is never used [INFO] [stdout] --> tutorial/src/advances/unsafe_rust.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | fn abs(input: i32) -> i32; [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Iterator` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:15:11 [INFO] [stdout] | [INFO] [stdout] 15 | pub trait Iterator { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_generic` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn test_generic() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_associated_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:40:4 [INFO] [stdout] | [INFO] [stdout] 40 | fn test_associated_type() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Millimeters` is never constructed [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:88:12 [INFO] [stdout] | [INFO] [stdout] 88 | struct Millimeters(u32); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Meters` is never constructed [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:89:12 [INFO] [stdout] | [INFO] [stdout] 89 | struct Meters(u32); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `OutlinePrint` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_trait.rs:161:11 [INFO] [stdout] | [INFO] [stdout] 161 | trait OutlinePrint: fmt::Display { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `takes_long_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | fn takes_long_type(f: Thunk) {} [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `returns_long_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:29:8 [INFO] [stdout] | [INFO] [stdout] 29 | fn returns_long_type() -> Thunk { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_never_type` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:39:4 [INFO] [stdout] | [INFO] [stdout] 39 | fn test_never_type() -> ! { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generic1` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn generic1(t: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generic2` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:49:4 [INFO] [stdout] | [INFO] [stdout] 49 | fn generic2(t: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generic3` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_type.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn generic3(t: &T) {} // 表示 T 是一个动态大小类型 [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:40:15 [INFO] [stdout] | [INFO] [stdout] 40 | Value(u32), [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] 40 - Value(u32), [INFO] [stdout] 40 + Value(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Stop` is never constructed [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:41:9 [INFO] [stdout] | [INFO] [stdout] 39 | enum Status { [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] 40 | Value(u32), [INFO] [stdout] 41 | Stop, [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `return_closure` is never used [INFO] [stdout] --> tutorial/src/advances/advanced_function.rs:50:4 [INFO] [stdout] | [INFO] [stdout] 50 | fn return_closure() -> Box i32> { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.03s [INFO] running `Command { std: "docker" "inspect" "d5d4d80e77fd48388b6ae8bf7b206c805981792ed084b650c34e0515c535d31c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d5d4d80e77fd48388b6ae8bf7b206c805981792ed084b650c34e0515c535d31c", kill_on_drop: false }` [INFO] [stdout] d5d4d80e77fd48388b6ae8bf7b206c805981792ed084b650c34e0515c535d31c