[INFO] cloning repository https://github.com/Reso1mi/rust-demo [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Reso1mi/rust-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FReso1mi%2Frust-demo", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FReso1mi%2Frust-demo'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 1255da9568c7e15e74b728a249d53550b5d80cfc [INFO] building Reso1mi/rust-demo against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FReso1mi%2Frust-demo" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/Reso1mi/rust-demo [INFO] finished tweaking git repo https://github.com/Reso1mi/rust-demo [INFO] tweaked toml for git repo https://github.com/Reso1mi/rust-demo written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/Reso1mi/rust-demo on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/Reso1mi/rust-demo 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded string_cache v0.8.9 [INFO] [stderr] Downloaded string_cache_codegen v0.5.4 [INFO] [stderr] Downloaded trpl v0.2.0 [INFO] [stderr] Downloaded bitflags v2.9.2 [INFO] [stderr] Downloaded gloo-timers v0.3.0 [INFO] [stderr] Downloaded ego-tree v0.6.3 [INFO] [stderr] Downloaded getopts v0.2.23 [INFO] [stderr] Downloaded async-attributes v1.1.2 [INFO] [stderr] Downloaded event-listener v2.5.3 [INFO] [stderr] Downloaded kv-log-macro v1.0.7 [INFO] [stderr] Downloaded value-bag v1.11.1 [INFO] [stderr] Downloaded polling v3.10.0 [INFO] [stderr] Downloaded mini-redis v0.4.1 [INFO] [stderr] Downloaded url v2.5.6 [INFO] [stderr] Downloaded hashbrown v0.15.5 [INFO] [stderr] Downloaded tempfile v3.21.0 [INFO] [stderr] Downloaded async-channel v1.9.0 [INFO] [stderr] Downloaded indexmap v2.11.0 [INFO] [stderr] Downloaded async-global-executor v2.4.1 [INFO] [stderr] Downloaded scraper v0.20.0 [INFO] [stderr] Downloaded regex v1.11.2 [INFO] [stderr] Downloaded unicode-width v0.2.1 [INFO] [stderr] Downloaded async-std v1.13.2 [INFO] [stderr] Downloaded atoi v0.3.3 [INFO] [stderr] Downloaded rustix v1.0.8 [INFO] [stderr] Downloaded regex-automata v0.4.10 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b98c95f882e135e1a19c5d282ff3ada4d048a0f31fac05b0857b835177576e35 [INFO] running `Command { std: "docker" "start" "-a" "b98c95f882e135e1a19c5d282ff3ada4d048a0f31fac05b0857b835177576e35", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b98c95f882e135e1a19c5d282ff3ada4d048a0f31fac05b0857b835177576e35", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b98c95f882e135e1a19c5d282ff3ada4d048a0f31fac05b0857b835177576e35", kill_on_drop: false }` [INFO] [stdout] b98c95f882e135e1a19c5d282ff3ada4d048a0f31fac05b0857b835177576e35 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 44acd9cd1b4aaa172eec7e1bfebe27f11d5987771654be3275fa279b3538b44a [INFO] running `Command { std: "docker" "start" "-a" "44acd9cd1b4aaa172eec7e1bfebe27f11d5987771654be3275fa279b3538b44a", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.95 [INFO] [stderr] Compiling unicode-ident v1.0.18 [INFO] [stderr] Compiling libc v0.2.174 [INFO] [stderr] Compiling cfg-if v1.0.1 [INFO] [stderr] Compiling pin-project-lite v0.2.16 [INFO] [stderr] Compiling autocfg v1.5.0 [INFO] [stderr] Compiling zerocopy v0.8.26 [INFO] [stderr] Compiling futures-core v0.3.31 [INFO] [stderr] Compiling smallvec v1.15.1 [INFO] [stderr] Compiling parking_lot_core v0.9.11 [INFO] [stderr] Compiling once_cell v1.21.3 [INFO] [stderr] Compiling scopeguard v1.2.0 [INFO] [stderr] Compiling stable_deref_trait v1.2.0 [INFO] [stderr] Compiling itoa v1.0.15 [INFO] [stderr] Compiling bytes v1.10.1 [INFO] [stderr] Compiling futures-io v0.3.31 [INFO] [stderr] Compiling slab v0.4.11 [INFO] [stderr] Compiling value-bag v1.11.1 [INFO] [stderr] Compiling siphasher v1.0.1 [INFO] [stderr] Compiling version_check v0.9.5 [INFO] [stderr] 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[INFO] [stderr] Compiling async-stream v0.3.6 [INFO] [stderr] Compiling tokio v1.47.1 [INFO] [stderr] Compiling phf v0.11.3 [INFO] [stderr] Compiling cssparser v0.31.2 [INFO] [stderr] Compiling futures-util v0.3.31 [INFO] [stderr] Compiling zerofrom v0.1.6 [INFO] [stderr] Compiling yoke v0.8.0 [INFO] [stderr] Compiling tracing v0.1.41 [INFO] [stderr] Compiling pin-project v1.1.10 [INFO] [stderr] Compiling zerovec v0.11.4 [INFO] [stderr] Compiling zerotrie v0.2.2 [INFO] [stderr] Compiling tracing-futures v0.2.5 [INFO] [stderr] Compiling tracing-subscriber v0.2.25 [INFO] [stderr] Compiling polling v3.10.0 [INFO] [stderr] Compiling async-io v2.5.0 [INFO] [stderr] Compiling async-global-executor v2.4.1 [INFO] [stderr] Compiling tinystr v0.8.1 [INFO] [stderr] Compiling potential_utf v0.1.2 [INFO] [stderr] Compiling async-std v1.13.2 [INFO] [stderr] Compiling icu_collections v2.0.0 [INFO] [stderr] Compiling icu_locale_core v2.0.0 [INFO] [stderr] Compiling scraper v0.20.0 [INFO] [stderr] Compiling icu_provider v2.0.0 [INFO] [stderr] Compiling icu_properties v2.0.1 [INFO] [stderr] Compiling icu_normalizer v2.0.0 [INFO] [stderr] Compiling futures-executor v0.3.31 [INFO] [stderr] Compiling futures v0.3.31 [INFO] [stderr] Compiling idna_adapter v1.2.1 [INFO] [stderr] Compiling idna v1.1.0 [INFO] [stderr] Compiling url v2.5.6 [INFO] [stderr] Compiling tokio-util v0.7.16 [INFO] [stderr] Compiling tower v0.5.2 [INFO] [stderr] Compiling tokio-native-tls v0.3.1 [INFO] [stderr] Compiling tokio-stream v0.1.17 [INFO] [stderr] Compiling tower-http v0.6.6 [INFO] [stderr] Compiling mini-redis v0.4.1 [INFO] [stderr] Compiling h2 v0.4.12 [INFO] [stderr] Compiling hyper v1.7.0 [INFO] [stderr] Compiling hyper-util v0.1.16 [INFO] [stderr] Compiling hyper-tls v0.6.0 [INFO] [stderr] Compiling reqwest v0.12.23 [INFO] [stderr] Compiling trpl v0.2.0 [INFO] [stderr] Compiling rust-demo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: struct `DoubleRef` is never constructed [INFO] [stdout] --> src/bin/lifetime_2.rs:22:8 [INFO] [stdout] | [INFO] [stdout] 22 | struct DoubleRef<'a, 'b: 'a, T> { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Ref` is never constructed [INFO] [stdout] --> src/bin/lifetime_2.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | struct Ref<'a, T: 'a> { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/lifetime_2.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `get_value` is never used [INFO] [stdout] --> src/bin/lifetime_2.rs:45:12 [INFO] [stdout] | [INFO] [stdout] 44 | impl StrOpt { [INFO] [stdout] | ----------- method in this implementation [INFO] [stdout] 45 | fn get_value(&self) -> &String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::process::id` [INFO] [stdout] --> src/bin/iter_3.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::process::id; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `combo` [INFO] [stdout] --> src/bin/drop_1.rs:34:9 [INFO] [stdout] | [INFO] [stdout] 34 | let combo = Combo { one: One, two: Two }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_combo` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `one` and `two` are never read [INFO] [stdout] --> src/bin/drop_1.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 16 | struct Combo { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 17 | one: One, [INFO] [stdout] | ^^^ [INFO] [stdout] 18 | two: Two, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `utils::HelloMacro` [INFO] [stdout] --> src/bin/marcro_1.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use utils::HelloMacro; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `p` [INFO] [stdout] --> src/bin/generics_1.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let p = Point { x: 1, y: 2 }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_p` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/bin/generics_1.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 3 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 4 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 5 | y: U, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MutRefIterator2` is never constructed [INFO] [stdout] --> src/bin/iter_3.rs:97:8 [INFO] [stdout] | [INFO] [stdout] 97 | struct MutRefIterator2<'a> { [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] --> src/bin/iter_3.rs:218:4 [INFO] [stdout] | [INFO] [stdout] 218 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_get_mut` is never used [INFO] [stdout] --> src/bin/iter_3.rs:236:4 [INFO] [stdout] | [INFO] [stdout] 236 | fn test_get_mut(v: &mut Vec, i: usize) -> Option<&mut usize> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_x` and `mixup` are never used [INFO] [stdout] --> src/bin/generics_1.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 8 | impl Point { [INFO] [stdout] | ---------------------- methods in this implementation [INFO] [stdout] 9 | fn get_x(&self) -> &T { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 13 | fn mixup(self, p: Point) -> Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> src/bin/generics_1.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn largest(list: &Vec) -> &T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest_2` is never used [INFO] [stdout] --> src/bin/generics_1.rs:43:4 [INFO] [stdout] | [INFO] [stdout] 43 | fn largest_2(list: &Vec) -> T { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/hashmap.rs:68:9 [INFO] [stdout] | [INFO] [stdout] 68 | let a = if true { 1 } else { 2 }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/deref_1.rs:15:22 [INFO] [stdout] | [INFO] [stdout] 15 | let Person { name, age } = &&&&&&&self; [INFO] [stdout] | ^^^^ help: try ignoring the field: `name: _` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `age` [INFO] [stdout] --> src/bin/deref_1.rs:15:28 [INFO] [stdout] | [INFO] [stdout] 15 | let Person { name, age } = &&&&&&&self; [INFO] [stdout] | ^^^ help: try ignoring the field: `age: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `age` [INFO] [stdout] --> src/bin/deref_1.rs:14:35 [INFO] [stdout] | [INFO] [stdout] 14 | fn display(self: &mut Person, age: u8) { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_age` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cc` [INFO] [stdout] --> src/bin/deref_1.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | let cc = my_str_box.deref(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/deref_1.rs:61:9 [INFO] [stdout] | [INFO] [stdout] 61 | let s1: &str = &my_str_box; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/deref_1.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | let s1: &String = &my_str_box; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/deref_1.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | let s1: String = my_str_box.to_string(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/deref_1.rs:70:20 [INFO] [stdout] | [INFO] [stdout] 70 | fn receive_mut_box(s: &mut String) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `StreamExt` and `stream::FuturesUnordered` [INFO] [stdout] --> src/bin/async_demo_4_join.rs:7:15 [INFO] [stdout] | [INFO] [stdout] 7 | use futures::{StreamExt, stream::FuturesUnordered}; [INFO] [stdout] | ^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_1` is never used [INFO] [stdout] --> src/bin/async_demo_2.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn test_1() { [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_2` is never used [INFO] [stdout] --> src/bin/async_demo_2.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn test_2() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/ownership.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn test() { [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 `page_title_2` is never used [INFO] [stdout] --> src/bin/async_demo_1.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn page_title_2(url: &str) -> impl Future> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/deref_1.rs:72:17 [INFO] [stdout] | [INFO] [stdout] 72 | fn receive_pstr(s: &str) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Person` is never constructed [INFO] [stdout] --> src/bin/deref_1.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | struct Person { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `display` are never used [INFO] [stdout] --> src/bin/deref_1.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl Person { [INFO] [stdout] | ----------- associated items in this implementation [INFO] [stdout] 10 | fn new(name: String, age: u8) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 14 | fn display(self: &mut Person, age: u8) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/rc_arc_1.rs:28:9 [INFO] [stdout] | [INFO] [stdout] 28 | let c = &s; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `rc` [INFO] [stdout] --> src/bin/rc_arc_1.rs:33:9 [INFO] [stdout] | [INFO] [stdout] 33 | let rc = Rc::new(s); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_rc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/async_demo_4_join.rs:38:13 [INFO] [stdout] | [INFO] [stdout] 38 | let c = pin!(async { true }); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `one_ms` [INFO] [stdout] --> src/bin/async_demo_4_join.rs:84:13 [INFO] [stdout] | [INFO] [stdout] 84 | let one_ms = Duration::from_millis(1); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_one_ms` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/rc_arc_1.rs:94:9 [INFO] [stdout] | [INFO] [stdout] 94 | let mut a = Rc::new(s); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/rc_arc_1.rs:97:9 [INFO] [stdout] | [INFO] [stdout] 97 | let mut b = Rc::clone(&a); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/rc_arc_1.rs:104:9 [INFO] [stdout] | [INFO] [stdout] 104 | let a = Box::new(s); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/rc_arc_1.rs:120:13 [INFO] [stdout] | [INFO] [stdout] 120 | let c = Rc::clone(&a); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_thread` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:26:4 [INFO] [stdout] | [INFO] [stdout] 26 | fn rc_thread() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_case` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn rc_case() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_deref_mut` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:92:4 [INFO] [stdout] | [INFO] [stdout] 92 | fn rc_deref_mut() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_1` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:101:4 [INFO] [stdout] | [INFO] [stdout] 101 | fn test_1() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::pin::pin` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::pin::pin; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `out` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:52:9 [INFO] [stdout] | [INFO] [stdout] 52 | let out = tokio::select! { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_out` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `addr` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:117:30 [INFO] [stdout] | [INFO] [stdout] 117 | let (socket, addr) = listener.accept().await?; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_addr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test1` is never used [INFO] [stdout] --> src/bin/async_demo_4_join.rs:10:4 [INFO] [stdout] | [INFO] [stdout] 10 | fn test1() { [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] --> src/bin/async_demo_4_join.rs:30:4 [INFO] [stdout] | [INFO] [stdout] 30 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test3_race` is never used [INFO] [stdout] --> src/bin/async_demo_4_join.rs:58:4 [INFO] [stdout] | [INFO] [stdout] 58 | fn test3_race() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_yidld` is never used [INFO] [stdout] --> src/bin/async_demo_4_join.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn test_yidld() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tx1` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:173:10 [INFO] [stdout] | [INFO] [stdout] 173 | let (tx1, mut rx1) = mpsc::channel(128); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tx1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tx2` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:174:10 [INFO] [stdout] | [INFO] [stdout] 174 | let (tx2, mut rx2) = mpsc::channel(128); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tx2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tx3` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:175:10 [INFO] [stdout] | [INFO] [stdout] 175 | let (tx3, mut rx3) = mpsc::channel(128); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tx3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/closure_2.rs:72:9 [INFO] [stdout] | [INFO] [stdout] 72 | let mut s = String::new(); [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: function `fn_elision` is never used [INFO] [stdout] --> src/bin/closure_2.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 32 | fn fn_elision(x: &i32) -> &i32 { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fn_once_2` is never used [INFO] [stdout] --> src/bin/closure_2.rs:95:4 [INFO] [stdout] | [INFO] [stdout] 95 | fn fn_once_2(f: F) [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::net::TcpStream` [INFO] [stdout] --> src/bin/async_io.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use tokio::net::TcpStream; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/async_io.rs:34:9 [INFO] [stdout] | [INFO] [stdout] 34 | let mut reader = b"hello"; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/async_demo_select_1.rs:199:10 [INFO] [stdout] | [INFO] [stdout] 199 | let (mut tx, mut rx) = mpsc::channel(128); [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/async_demo_select_1.rs:235:10 [INFO] [stdout] | [INFO] [stdout] 235 | let (mut tx, mut rx) = tokio::sync::mpsc::channel(128); [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_cond` is never used [INFO] [stdout] --> src/bin/thread_1.rs:33:4 [INFO] [stdout] | [INFO] [stdout] 33 | fn thread_cond() { [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 `thread_local` is never used [INFO] [stdout] --> src/bin/thread_1.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn thread_local() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_barrier` is never used [INFO] [stdout] --> src/bin/thread_1.rs:88:4 [INFO] [stdout] | [INFO] [stdout] 88 | fn thread_barrier() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `child_child_thread` is never used [INFO] [stdout] --> src/bin/thread_1.rs:105:4 [INFO] [stdout] | [INFO] [stdout] 105 | fn child_child_thread() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_spawn_move` is never used [INFO] [stdout] --> src/bin/thread_1.rs:123:4 [INFO] [stdout] | [INFO] [stdout] 123 | fn thread_spawn_move() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_spawn` is never used [INFO] [stdout] --> src/bin/thread_1.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn thread_spawn() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 28 | handle1.join(); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 28 | let _ = handle1.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:29:5 [INFO] [stdout] | [INFO] [stdout] 29 | handle2.join(); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 29 | let _ = handle2.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:80:5 [INFO] [stdout] | [INFO] [stdout] 80 | t.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 80 | let _ = t.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | h.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 101 | let _ = h.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `socket` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:102:19 [INFO] [stdout] | [INFO] [stdout] 102 | fn process_socket(socket: TcpStream) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_socket` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `path` [INFO] [stdout] --> src/bin/error_r.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::{fs, path}; [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: `ops::Not` [INFO] [stdout] --> src/bin/error_r.rs:3:21 [INFO] [stdout] | [INFO] [stdout] 3 | use std::{fs::File, ops::Not}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/error_r.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let v = vec![1, 2, 3, 4]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `other` [INFO] [stdout] --> src/bin/error_r.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | other => panic!("error"), [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] help: if this is intentional, prefix it with an underscore [INFO] [stdout] | [INFO] [stdout] 18 | _other => panic!("error"), [INFO] [stdout] | + [INFO] [stdout] help: you might have meant to pattern match on the similarly named variant `Other` [INFO] [stdout] | [INFO] [stdout] 18 - other => panic!("error"), [INFO] [stdout] 18 + std::io::ErrorKind::Other => panic!("error"), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/bin/reborrow.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let x = Point { x: 1, y: 1 }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cloned` [INFO] [stdout] --> src/bin/type_1.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let cloned = value.clone(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_cloned` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/type_1.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | let mut a = &mut 0; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/type_1.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let mut a = &mut 0; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/type_1.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let mut b = &0; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/bin/type_1.rs:21:27 [INFO] [stdout] | [INFO] [stdout] 21 | fn recive_2(t: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `do_stuff` is never used [INFO] [stdout] --> src/bin/type_1.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 9 | fn do_stuff(value: &T) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MySelect` is never constructed [INFO] [stdout] --> src/bin/async_demo_select_1.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | struct MySelect { [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_select` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:40:10 [INFO] [stdout] | [INFO] [stdout] 40 | async fn test_select() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_my_select` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:85:10 [INFO] [stdout] | [INFO] [stdout] 85 | async fn test_my_select() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `process_socket` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:102:4 [INFO] [stdout] | [INFO] [stdout] 102 | fn process_socket(socket: TcpStream) {} [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_select_2` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:104:10 [INFO] [stdout] | [INFO] [stdout] 104 | async fn test_select_2() -> io::Result<()> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `race` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:136:10 [INFO] [stdout] | [INFO] [stdout] 136 | async fn race(data: &[u8], addr1: SocketAddr, addr2: SocketAddr) -> io::Result<()> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_loop_select` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:172:10 [INFO] [stdout] | [INFO] [stdout] 172 | async fn test_loop_select() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_length` is never used [INFO] [stdout] --> src/bin/reborrow.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn read_length(strings: &mut Vec) -> usize { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `action` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:188:10 [INFO] [stdout] | [INFO] [stdout] 188 | async fn action() {} [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `unpin_action` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:191:10 [INFO] [stdout] | [INFO] [stdout] 191 | async fn unpin_action() -> u32 { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_select_recover` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:198:10 [INFO] [stdout] | [INFO] [stdout] 198 | async fn test_select_recover() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused implementer of `Future` that must be used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:200:5 [INFO] [stdout] | [INFO] [stdout] 200 | tx.send(1); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: futures do nothing unless you `.await` or poll them [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `s` is never read [INFO] [stdout] --> src/bin/ownership_2.rs:18:5 [INFO] [stdout] | [INFO] [stdout] 18 | s = other_string; [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: variable does not need to be mutable [INFO] [stdout] --> src/bin/ownership_2.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let mut other_string = String::from("other"); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ownership_2.rs:26:10 [INFO] [stdout] | [INFO] [stdout] 26 | fn test3(mut s: &mut String) { [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/bin/ownership_2.rs:41:9 [INFO] [stdout] | [INFO] [stdout] 41 | let z = &mut kk; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `n` [INFO] [stdout] --> src/bin/ownership_2.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let n = *(&num); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_n` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `deref_test` is never used [INFO] [stdout] --> src/bin/ownership_2.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn deref_test() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/bin/ownership_2.rs:55:8 [INFO] [stdout] | [INFO] [stdout] 55 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_x`, `get_x_3`, and `mixup` are never used [INFO] [stdout] --> src/bin/ownership_2.rs:62:8 [INFO] [stdout] | [INFO] [stdout] 60 | impl Point { [INFO] [stdout] | ---------------------- methods in this implementation [INFO] [stdout] 61 | // 返回引用，不涉及所有权 [INFO] [stdout] 62 | fn get_x(&self) -> &T { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 72 | fn get_x_3(self) -> T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 76 | fn mixup(self, p: Point) -> Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/bin/lifetime_3.rs:47:9 [INFO] [stdout] | [INFO] [stdout] 47 | let i = list.get_interface_2(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/lifetime_3.rs:69:9 [INFO] [stdout] | [INFO] [stdout] 69 | let c = get(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `manager` is never read [INFO] [stdout] --> src/bin/lifetime_3.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 1 | struct Interface<'a, 'b> { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 2 | manager: &'b mut Manager<'a>, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `noop` is never used [INFO] [stdout] --> src/bin/lifetime_3.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 5 | impl<'a, 'b> Interface<'a, 'b> { [INFO] [stdout] | ------------------------------ method in this implementation [INFO] [stdout] 6 | pub fn noop(self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get` is never used [INFO] [stdout] --> src/bin/lifetime_3.rs:64:4 [INFO] [stdout] | [INFO] [stdout] 64 | fn get() -> &'static String { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `a` is never used [INFO] [stdout] --> src/bin/lifetime_3.rs:68:4 [INFO] [stdout] | [INFO] [stdout] 68 | fn a() { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `format` [INFO] [stdout] --> src/bin/trait_1.rs:1:25 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{Display, format}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_a` [INFO] [stdout] --> src/bin/trait_1.rs:54:13 [INFO] [stdout] | [INFO] [stdout] 54 | fn notify_3(item_a: impl Summary, item_b: impl Summary) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_b` [INFO] [stdout] --> src/bin/trait_1.rs:54:35 [INFO] [stdout] | [INFO] [stdout] 54 | fn notify_3(item_a: impl Summary, item_b: impl Summary) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_a` [INFO] [stdout] --> src/bin/trait_1.rs:57:25 [INFO] [stdout] | [INFO] [stdout] 57 | fn notify_4(item_a: T, item_b: T) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_b` [INFO] [stdout] --> src/bin/trait_1.rs:57:36 [INFO] [stdout] | [INFO] [stdout] 57 | fn notify_4(item_a: T, item_b: T) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item` [INFO] [stdout] --> src/bin/trait_1.rs:60:13 [INFO] [stdout] | [INFO] [stdout] 60 | fn notify_5(item: impl Summary + Display) {} [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_item` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item` [INFO] [stdout] --> src/bin/trait_1.rs:62:35 [INFO] [stdout] | [INFO] [stdout] 62 | fn notify_6(item: T) {} [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_item` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item` [INFO] [stdout] --> src/bin/trait_1.rs:65:16 [INFO] [stdout] | [INFO] [stdout] 65 | fn notify_7(item: T) [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_item` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify` is never used [INFO] [stdout] --> src/bin/trait_1.rs:44:4 [INFO] [stdout] | [INFO] [stdout] 44 | fn notify(item: impl Summary) { [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 `notify_2` is never used [INFO] [stdout] --> src/bin/trait_1.rs:49:4 [INFO] [stdout] | [INFO] [stdout] 49 | fn notify_2(item: T) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_3` is never used [INFO] [stdout] --> src/bin/trait_1.rs:54:4 [INFO] [stdout] | [INFO] [stdout] 54 | fn notify_3(item_a: impl Summary, item_b: impl Summary) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_4` is never used [INFO] [stdout] --> src/bin/trait_1.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn notify_4(item_a: T, item_b: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_5` is never used [INFO] [stdout] --> src/bin/trait_1.rs:60:4 [INFO] [stdout] | [INFO] [stdout] 60 | fn notify_5(item: impl Summary + Display) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_6` is never used [INFO] [stdout] --> src/bin/trait_1.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn notify_6(item: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_7` is never used [INFO] [stdout] --> src/bin/trait_1.rs:65:4 [INFO] [stdout] | [INFO] [stdout] 65 | fn notify_7(item: T) [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `returns_summarizable` is never used [INFO] [stdout] --> src/bin/trait_1.rs:94:4 [INFO] [stdout] | [INFO] [stdout] 94 | fn returns_summarizable(switch: bool) -> Box { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest_2` is never used [INFO] [stdout] --> src/bin/trait_1.rs:124:4 [INFO] [stdout] | [INFO] [stdout] 124 | fn largest_2(list: &Vec) -> T { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/bin/trait_1.rs:134:8 [INFO] [stdout] | [INFO] [stdout] 134 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/bin/trait_1.rs:140:8 [INFO] [stdout] | [INFO] [stdout] 139 | impl Point { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 140 | fn new() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `test` is never used [INFO] [stdout] --> src/bin/trait_1.rs:147:8 [INFO] [stdout] | [INFO] [stdout] 146 | impl Point { [INFO] [stdout] | ----------------------------------- method in this implementation [INFO] [stdout] 147 | fn test(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `fmt::format` [INFO] [stdout] --> src/bin/async_echo_server.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | fmt::format, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::process::Output` [INFO] [stdout] --> src/bin/async_2.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::process::Output; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `future_one` [INFO] [stdout] --> src/bin/async_2.rs:55:13 [INFO] [stdout] | [INFO] [stdout] 55 | let future_one = async move { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_future_one` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/bin/async_2.rs:5:10 [INFO] [stdout] | [INFO] [stdout] 5 | async fn foo() -> u8 { [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 `bar` is never used [INFO] [stdout] --> src/bin/async_2.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn bar() -> impl Future { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `blocks` is never used [INFO] [stdout] --> src/bin/async_2.rs:32:14 [INFO] [stdout] | [INFO] [stdout] 32 | async fn blocks() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `blocks_2` is never used [INFO] [stdout] --> src/bin/async_2.rs:52:14 [INFO] [stdout] | [INFO] [stdout] 52 | async fn blocks_2<'a>(my_string: &'a String) -> impl Future + 'a { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/bin/async_2.rs:77:14 [INFO] [stdout] | [INFO] [stdout] 77 | async fn foo(x: &u8) -> u8 { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo_expanded` is never used [INFO] [stdout] --> src/bin/async_2.rs:82:8 [INFO] [stdout] | [INFO] [stdout] 82 | fn foo_expanded<'a>(x: &'a u8) -> impl Future + 'a { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `good` is never used [INFO] [stdout] --> src/bin/async_2.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | fn good() -> impl Future + 'static { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `good2` is never used [INFO] [stdout] --> src/bin/async_2.rs:102:8 [INFO] [stdout] | [INFO] [stdout] 102 | fn good2() -> impl Future + 'static { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `borrow_x` is never used [INFO] [stdout] --> src/bin/async_2.rs:110:14 [INFO] [stdout] | [INFO] [stdout] 110 | async fn borrow_x(x: &u8) -> u8 { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `String::as_bytes` that must be used [INFO] [stdout] --> src/bin/async_2.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | z.as_bytes(); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 30 | let _ = z.as_bytes(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:76:9 [INFO] [stdout] | [INFO] [stdout] 76 | cx: &mut Context<'_>, [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:88:9 [INFO] [stdout] | [INFO] [stdout] 88 | cx: &mut Context<'_>, [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:95:41 [INFO] [stdout] | [INFO] [stdout] 95 | fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:99:41 [INFO] [stdout] | [INFO] [stdout] 99 | fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MockTcpStream` is never constructed [INFO] [stdout] --> src/bin/async_web_server.rs:65:8 [INFO] [stdout] | [INFO] [stdout] 65 | struct MockTcpStream { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `ops::Deref` and `self` [INFO] [stdout] --> src/bin/pin_1.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | ops::Deref, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 5 | pin::{self, Pin}, [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 imports: `DerefMut` and `Deref` [INFO] [stdout] --> src/bin/pin_2.rs:2:16 [INFO] [stdout] | [INFO] [stdout] 2 | use std::ops::{Deref, DerefMut}; [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: `ptr::swap` [INFO] [stdout] --> src/bin/pin_2.rs:3:21 [INFO] [stdout] | [INFO] [stdout] 3 | use std::{pin::Pin, ptr::swap}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `test1` [INFO] [stdout] --> src/bin/pin_2.rs:46:13 [INFO] [stdout] | [INFO] [stdout] 46 | let mut test1 = test1.as_mut(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_test1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `test2` [INFO] [stdout] --> src/bin/pin_2.rs:47:13 [INFO] [stdout] | [INFO] [stdout] 47 | let mut test2 = test2.as_mut(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_test2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_2.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let mut test1 = test1.as_mut(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_2.rs:47:9 [INFO] [stdout] | [INFO] [stdout] 47 | let mut test2 = test2.as_mut(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::num` [INFO] [stdout] --> src/bin/closure_4.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::num; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `pin_heap` is never used [INFO] [stdout] --> src/bin/pin_2.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn pin_heap() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `a`, and `b` are never used [INFO] [stdout] --> src/bin/pin_2.rs:18:12 [INFO] [stdout] | [INFO] [stdout] 17 | impl Test { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 18 | fn new(txt: &str) -> Pin> { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 31 | fn a<'a>(self: Pin<&'a Self>) -> &'a str { [INFO] [stdout] | ^ [INFO] [stdout] ... [INFO] [stdout] 35 | fn b<'a>(self: Pin<&'a Self>) -> &'a String { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `pin_stack` is never used [INFO] [stdout] --> src/bin/pin_2.rs:55:4 [INFO] [stdout] | [INFO] [stdout] 55 | fn pin_stack() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `init`, `a`, and `b` are never used [INFO] [stdout] --> src/bin/pin_2.rs:64:12 [INFO] [stdout] | [INFO] [stdout] 63 | impl Test { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 64 | fn new(txt: &str) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 72 | fn init<'a>(self: Pin<&'a mut Self>) { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 78 | fn a<'a>(self: Pin<&'a Self>) -> &'a str { [INFO] [stdout] | ^ [INFO] [stdout] ... [INFO] [stdout] 82 | fn b<'a>(self: Pin<&'a Self>) -> &'a String { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `swap_move` is never used [INFO] [stdout] --> src/bin/pin_2.rs:109:4 [INFO] [stdout] | [INFO] [stdout] 109 | fn swap_move() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_pinned_ref` is never used [INFO] [stdout] --> src/bin/pin_2.rs:119:4 [INFO] [stdout] | [INFO] [stdout] 119 | fn move_pinned_ref(mut a: T, mut b: T) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_pinned_ref_unpin` is never used [INFO] [stdout] --> src/bin/pin_2.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn move_pinned_ref_unpin(mut a: T, mut b: T) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_pined_ref_2` is never used [INFO] [stdout] --> src/bin/pin_2.rs:143:4 [INFO] [stdout] | [INFO] [stdout] 143 | fn move_pined_ref_2() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_1.rs:111:9 [INFO] [stdout] | [INFO] [stdout] 111 | let mut this1 = unsafe { test1.get_unchecked_mut() }; // 绕过编译器检查 [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_1.rs:112:9 [INFO] [stdout] | [INFO] [stdout] 112 | let mut this2 = unsafe { test2.get_unchecked_mut() }; // 绕过编译器检查 [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated functions `a3` and `a3_1` are never used [INFO] [stdout] --> src/bin/pin_1.rs:72:12 [INFO] [stdout] | [INFO] [stdout] 25 | impl Test { [INFO] [stdout] | --------- associated functions in this implementation [INFO] [stdout] ... [INFO] [stdout] 72 | fn a3(pin_self: Pin<&Self>) -> &str { [INFO] [stdout] | ^^ [INFO] [stdout] ... [INFO] [stdout] 77 | fn a3_1<'a>(pin_self: Pin<&'a Self>) -> &'a str { [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 `pin_test` is never used [INFO] [stdout] --> src/bin/pin_1.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn pin_test() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `init`, `a`, and `b` are never used [INFO] [stdout] --> src/bin/pin_1.rs:123:12 [INFO] [stdout] | [INFO] [stdout] 122 | impl Test { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 123 | fn new(s: &str) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 130 | fn init(&mut self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 134 | fn a(&self) -> &str { [INFO] [stdout] | ^ [INFO] [stdout] ... [INFO] [stdout] 138 | fn b(&self) -> &String { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `raw_point_value_move` is never used [INFO] [stdout] --> src/bin/pin_1.rs:165:4 [INFO] [stdout] | [INFO] [stdout] 165 | fn raw_point_value_move() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_int` [INFO] [stdout] --> src/bin/match_r.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | let some_int = Some(32); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_int` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_char` [INFO] [stdout] --> src/bin/match_r.rs:55:9 [INFO] [stdout] | [INFO] [stdout] 55 | let some_char = Some('b'); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `null_int` [INFO] [stdout] --> src/bin/match_r.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | let null_int: Option = None; [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_null_int` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Message` is never used [INFO] [stdout] --> src/bin/match_r.rs:1:6 [INFO] [stdout] | [INFO] [stdout] 1 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddrKind` is never used [INFO] [stdout] --> src/bin/match_r.rs:9:6 [INFO] [stdout] | [INFO] [stdout] 9 | enum IpAddrKind { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/match_r.rs:16:8 [INFO] [stdout] | [INFO] [stdout] 16 | V4(String), [INFO] [stdout] | -- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IpAddr` 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 - V4(String), [INFO] [stdout] 16 + V4(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `V6` is never constructed [INFO] [stdout] --> src/bin/match_r.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 15 | enum IpAddr { [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] 16 | V4(String), [INFO] [stdout] 17 | V6(String), [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `USA` and `Japan` are never constructed [INFO] [stdout] --> src/bin/match_r.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 21 | enum Holder { [INFO] [stdout] | ------ variants in this enum [INFO] [stdout] 22 | China, [INFO] [stdout] 23 | USA, [INFO] [stdout] | ^^^ [INFO] [stdout] 24 | Japan, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Holder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `BTC` and `ETH` are never constructed [INFO] [stdout] --> src/bin/match_r.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 27 | enum Coin { [INFO] [stdout] | ---- variants in this enum [INFO] [stdout] 28 | BTC, [INFO] [stdout] | ^^^ [INFO] [stdout] 29 | ETH, [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Arc` and `Thread` [INFO] [stdout] --> src/bin/chan_1.rs:2:12 [INFO] [stdout] | [INFO] [stdout] 2 | sync::{Arc, mpsc}, [INFO] [stdout] | ^^^ [INFO] [stdout] 3 | thread::{self, Thread}, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> src/bin/proc_marcro_1.rs:11:17 [INFO] [stdout] | [INFO] [stdout] 11 | struct SomeData(u32, String); [INFO] [stdout] | -------- ^^^ ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing these fields [INFO] [stdout] = note: `SomeData` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `name` and `data` are never read [INFO] [stdout] --> src/bin/proc_marcro_1.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 14 | struct User { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 15 | name: String, [INFO] [stdout] | ^^^^ [INFO] [stdout] 16 | data: SomeData, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `send_enum` is never used [INFO] [stdout] --> src/bin/chan_1.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn send_enum() { [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 `block_chan` is never used [INFO] [stdout] --> src/bin/chan_1.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn block_chan() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `send_some` is never used [INFO] [stdout] --> src/bin/chan_1.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn send_some() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/chan_1.rs:72:4 [INFO] [stdout] | [INFO] [stdout] 72 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `trans_ownership` is never used [INFO] [stdout] --> src/bin/chan_1.rs:110:4 [INFO] [stdout] | [INFO] [stdout] 110 | fn trans_ownership() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `try_recv` is never used [INFO] [stdout] --> src/bin/chan_1.rs:125:4 [INFO] [stdout] | [INFO] [stdout] 125 | fn try_recv() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `recv_1` is never used [INFO] [stdout] --> src/bin/chan_1.rs:136:4 [INFO] [stdout] | [INFO] [stdout] 136 | fn recv_1() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 24 | / s.send(Animal::Cat { [INFO] [stdout] 25 | | age: 8, [INFO] [stdout] 26 | | name: "zaizai".to_string(), [INFO] [stdout] 27 | | }); [INFO] [stdout] | |______^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 24 | let _ = s.send(Animal::Cat { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 28 | s.send(Animal::Dog("qdd")); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 28 | let _ = s.send(Animal::Dog("qdd")); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:42:9 [INFO] [stdout] | [INFO] [stdout] 42 | s.send("t"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 42 | let _ = s.send("t"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | s.send("a"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 44 | let _ = s.send("a"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | s.send("b"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 46 | let _ = s.send("b"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:61:9 [INFO] [stdout] | [INFO] [stdout] 61 | s.send("t"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 61 | let _ = s.send("t"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | s.send("a"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 62 | let _ = s.send("a"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | s.send("b"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 63 | let _ = s.send("b"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | s2.send(str); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 101 | let _ = s2.send(str); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:116:9 [INFO] [stdout] | [INFO] [stdout] 116 | s.send(str); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 116 | let _ = s.send(str); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `fmt::format` [INFO] [stdout] --> src/bin/async_mini_redis.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | fmt::format, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/async_demo_5_stream.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn test() { [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_stream_timeout` is never used [INFO] [stdout] --> src/bin/async_demo_5_stream.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn test_stream_timeout() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/box_1.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let f = arr_s.index(0); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `first` [INFO] [stdout] --> src/bin/box_1.rs:43:10 [INFO] [stdout] | [INFO] [stdout] 43 | let (first, second) = (&arr[0], &arr[1]); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_first` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `second` [INFO] [stdout] --> src/bin/box_1.rs:43:17 [INFO] [stdout] | [INFO] [stdout] 43 | let (first, second) = (&arr[0], &arr[1]); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/box_1.rs:35:9 [INFO] [stdout] | [INFO] [stdout] 35 | let mut arr_s = vec!["1".to_string(), "2".to_string()]; [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: `arr1` [INFO] [stdout] --> src/bin/box_1.rs:109:9 [INFO] [stdout] | [INFO] [stdout] 109 | let arr1 = arr; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_arr1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arr2` [INFO] [stdout] --> src/bin/box_1.rs:111:9 [INFO] [stdout] | [INFO] [stdout] 111 | let arr2 = arr; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_arr2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arr3` [INFO] [stdout] --> src/bin/box_1.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | let arr3 = arr; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_arr3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `List` is never used [INFO] [stdout] --> src/bin/box_1.rs:97:14 [INFO] [stdout] | [INFO] [stdout] 97 | enum List { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mbc` [INFO] [stdout] --> src/bin/cell_refcell_1.rs:86:9 [INFO] [stdout] | [INFO] [stdout] 86 | let mbc = c.borrow_mut(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_mbc` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `cell_from_mut` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn cell_from_mut() { [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 `refcell_inner_mut` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:50:4 [INFO] [stdout] | [INFO] [stdout] 50 | fn refcell_inner_mut() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_refcell` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:81:4 [INFO] [stdout] | [INFO] [stdout] 81 | fn test_refcell() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_cell` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn test_cell() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/bin/ownership_4.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | let z = t.a; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `update_string_once` [INFO] [stdout] --> src/bin/closure_3.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | let update_string_once = |x: u32| x; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_update_string_once` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/static_1.rs:70:9 [INFO] [stdout] | [INFO] [stdout] 70 | let c = 1; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/static_1.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | let mut v = "s13".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/static_1.rs:71:9 [INFO] [stdout] | [INFO] [stdout] 71 | let mut v = "s13".to_string(); [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: static `REQUEST_RECV` is never used [INFO] [stdout] --> src/bin/static_1.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | static mut REQUEST_RECV: usize = 0; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Config` is never constructed [INFO] [stdout] --> src/bin/static_1.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | struct Config { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static `CONFIG` is never used [INFO] [stdout] --> src/bin/static_1.rs:38:12 [INFO] [stdout] | [INFO] [stdout] 38 | static mut CONFIG: Option<&'static mut Config> = None; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static `CONFIG_2` is never used [INFO] [stdout] --> src/bin/static_1.rs:42:8 [INFO] [stdout] | [INFO] [stdout] 42 | static CONFIG_2: OnceLock = OnceLock::new(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test2` is never used [INFO] [stdout] --> src/bin/static_1.rs:44:4 [INFO] [stdout] | [INFO] [stdout] 44 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_box_leak` is never used [INFO] [stdout] --> src/bin/static_1.rs:60:4 [INFO] [stdout] | [INFO] [stdout] 60 | fn test_box_leak() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/async_demo_close.rs:8:10 [INFO] [stdout] | [INFO] [stdout] 8 | async fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt::format` [INFO] [stdout] --> src/bin/vector_2.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::format; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `m` [INFO] [stdout] --> src/bin/vector_2.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let m = String::new(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_m` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `l` [INFO] [stdout] --> src/bin/vector_2.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let l = "test".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_l` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ll` [INFO] [stdout] --> src/bin/vector_2.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let ll = String::from("test"); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_ll` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let hello = String::from("السلام عليكم"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let hello = String::from("Dobrý den"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 10 | let hello = String::from("Hello"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | let hello = String::from("שָׁלוֹם"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 12 | let hello = String::from("नमस्ते"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let hello = String::from("こんにちは"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let hello = String::from("안녕하세요"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let hello = String::from("你好"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | let hello = String::from("Olá"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | let hello = String::from("Здравствуйте"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let hello = String::from("Hola"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/struct_r.rs:9:14 [INFO] [stdout] | [INFO] [stdout] 9 | struct Point(u32, u32); [INFO] [stdout] | ----- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 9 - struct Point(u32, u32); [INFO] [stdout] 9 + struct Point((), u32); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_w` and `area2` are never used [INFO] [stdout] --> src/bin/struct_r.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Rectangle { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 18 | fn get_w(&self) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 28 | fn area2(self, c: u32) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/bin/struct_r.rs:97:4 [INFO] [stdout] | [INFO] [stdout] 97 | fn build_user(email: String, name: String, active: bool) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `sync::Arc` [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{sync::Arc, time::Duration}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ptr_addr_1.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let mut str_opt = StrOpt { [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: function `test1` is never used [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn test1() { [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] --> src/bin/async_demo_3_chan.rs:15:4 [INFO] [stdout] | [INFO] [stdout] 15 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test3` is never used [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:39:4 [INFO] [stdout] | [INFO] [stdout] 39 | fn test3() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test4` is never used [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:69:4 [INFO] [stdout] | [INFO] [stdout] 69 | fn test4() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MiniTokio` is never constructed [INFO] [stdout] --> src/bin/async_mini_tokio.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 11 | struct MiniTokio { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type alias `Task` is never used [INFO] [stdout] --> src/bin/async_mini_tokio.rs:15:6 [INFO] [stdout] | [INFO] [stdout] 15 | type Task = Pin + Send>>; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `spawn`, and `run` are never used [INFO] [stdout] --> src/bin/async_mini_tokio.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl MiniTokio { [INFO] [stdout] | -------------- associated items in this implementation [INFO] [stdout] 18 | fn new() -> MiniTokio { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 25 | fn spawn(&mut self, future: F) [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 32 | fn run(&mut self) { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | let v = match &str_opt.value { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:32:13 [INFO] [stdout] | [INFO] [stdout] 32 | let v = match str_opt.value { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:45:13 [INFO] [stdout] | [INFO] [stdout] 45 | let v = match str_opt.value { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:60:13 [INFO] [stdout] | [INFO] [stdout] 60 | let v = match s.raw_int { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `str_opt2` [INFO] [stdout] --> src/bin/ownership_3.rs:96:17 [INFO] [stdout] | [INFO] [stdout] 96 | let mut str_opt2 = &StrOpt { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_opt2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ownership_3.rs:96:13 [INFO] [stdout] | [INFO] [stdout] 96 | let mut str_opt2 = &StrOpt { [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: `z` [INFO] [stdout] --> src/bin/ownership_3.rs:134:21 [INFO] [stdout] | [INFO] [stdout] 134 | let z = (self.calc)(&arg); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `get_value` is never used [INFO] [stdout] --> src/bin/ownership_3.rs:73:16 [INFO] [stdout] | [INFO] [stdout] 72 | impl StrOpt { [INFO] [stdout] | ----------- method in this implementation [INFO] [stdout] 73 | fn get_value(&self) -> &String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Cache` is never constructed [INFO] [stdout] --> src/bin/ownership_3.rs:104:8 [INFO] [stdout] | [INFO] [stdout] 104 | struct Cache [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `get_value` are never used [INFO] [stdout] --> src/bin/ownership_3.rs:119:8 [INFO] [stdout] | [INFO] [stdout] 113 | / impl Cache [INFO] [stdout] 114 | | where [INFO] [stdout] 115 | | F: Fn(&K) -> V, [INFO] [stdout] 116 | | K: Eq + Hash + Clone, [INFO] [stdout] 117 | | V: Debug, [INFO] [stdout] | |_____________- associated items in this implementation [INFO] [stdout] 118 | { [INFO] [stdout] 119 | fn new(calc: F) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 126 | fn get_value(&mut self, arg: K) -> &V { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v_iter` [INFO] [stdout] --> src/bin/iter_1.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let v_iter = v.iter(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_iter` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v_iter` [INFO] [stdout] --> src/bin/iter_1.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let v_iter = v.iter_mut(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_iter` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/iter_1.rs:27:9 [INFO] [stdout] | [INFO] [stdout] 27 | let mut s_arr = ["8".to_string(), "9".to_string(), "10".to_string()]; [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/iter_1.rs:76:9 [INFO] [stdout] | [INFO] [stdout] 76 | let mut iter = v.iter(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `sim_for` is never used [INFO] [stdout] --> src/bin/iter_1.rs:86:4 [INFO] [stdout] | [INFO] [stdout] 86 | fn sim_for() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::slice::IterMut` that must be used [INFO] [stdout] --> src/bin/iter_1.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | a.iter_mut(); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 5 | let _ = a.iter_mut(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ccc` [INFO] [stdout] --> src/bin/temp_val_1.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let ccc = t.c; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_ccc` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `a` is never read [INFO] [stdout] --> src/bin/temp_val_1.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 36 | struct Test<'a> { [INFO] [stdout] | ---- field in this struct [INFO] [stdout] 37 | a: String, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `collections::HashMap`, `fmt::Display`, and `hash::Hash` [INFO] [stdout] --> src/bin/closure_1.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{collections::HashMap, fmt::Display, hash::Hash, thread, time::Duration}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^ ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expensive_closure` [INFO] [stdout] --> src/bin/closure_1.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let expensive_closure = |num: u32| { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_closure` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mod_x` [INFO] [stdout] --> src/bin/closure_1.rs:51:9 [INFO] [stdout] | [INFO] [stdout] 51 | let mod_x = || print!("{:?}", x); //Fn [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_mod_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mod_x` [INFO] [stdout] --> src/bin/closure_1.rs:52:13 [INFO] [stdout] | [INFO] [stdout] 52 | let mut mod_x = || x.push(1); //FnMut [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_mod_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mod_x` [INFO] [stdout] --> src/bin/closure_1.rs:53:9 [INFO] [stdout] | [INFO] [stdout] 53 | let mod_x = || x; //FnOnce [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_mod_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/closure_1.rs:52:9 [INFO] [stdout] | [INFO] [stdout] 52 | let mut mod_x = || x.push(1); //FnMut [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/vector_1.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | let mut v = vec![1, 2, 3, 4, 5, 6]; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/vector_1.rs:38:13 [INFO] [stdout] | [INFO] [stdout] 38 | BTC(String), [INFO] [stdout] | --- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 38 - BTC(String), [INFO] [stdout] 38 + BTC(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/vector_1.rs:39:13 [INFO] [stdout] | [INFO] [stdout] 39 | ETH(u32), [INFO] [stdout] | --- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] 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] 39 - ETH(u32), [INFO] [stdout] 39 + ETH(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/vector_1.rs:40:13 [INFO] [stdout] | [INFO] [stdout] 40 | SOL(f64), [INFO] [stdout] | --- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] 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 - SOL(f64), [INFO] [stdout] 40 + SOL(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `send_recv` is never used [INFO] [stdout] --> src/bin/async_stream_1.rs:5:10 [INFO] [stdout] | [INFO] [stdout] 5 | async fn send_recv() { [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 `sum_with_next` is never used [INFO] [stdout] --> src/bin/async_stream_1.rs:20:10 [INFO] [stdout] | [INFO] [stdout] 20 | async fn sum_with_next(mut stream: Pin<&mut dyn Stream>) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `sum_with_try_next` is never used [INFO] [stdout] --> src/bin/async_stream_1.rs:29:10 [INFO] [stdout] | [INFO] [stdout] 29 | async fn sum_with_try_next( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::pin::pin` [INFO] [stdout] --> src/bin/async_3.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::pin::pin; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/send_sync_1.rs:6:14 [INFO] [stdout] | [INFO] [stdout] 6 | struct MyBox(*const u8); [INFO] [stdout] | ----- ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `MyBox` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `select_2` is never used [INFO] [stdout] --> src/bin/async_3.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn select_2() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized] target(s) in 1m 29s [INFO] running `Command { std: "docker" "inspect" "44acd9cd1b4aaa172eec7e1bfebe27f11d5987771654be3275fa279b3538b44a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "44acd9cd1b4aaa172eec7e1bfebe27f11d5987771654be3275fa279b3538b44a", kill_on_drop: false }` [INFO] [stdout] 44acd9cd1b4aaa172eec7e1bfebe27f11d5987771654be3275fa279b3538b44a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9d2af0dc6dd572f487950e52f670253777ed1faa6621149504520c7bf72d184f [INFO] running `Command { std: "docker" "start" "-a" "9d2af0dc6dd572f487950e52f670253777ed1faa6621149504520c7bf72d184f", kill_on_drop: false }` [INFO] [stderr] Compiling rust-demo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: value assigned to `s` is never read [INFO] [stdout] --> src/bin/ownership_2.rs:18:5 [INFO] [stdout] | [INFO] [stdout] 18 | s = other_string; [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: variable does not need to be mutable [INFO] [stdout] --> src/bin/ownership_2.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let mut other_string = String::from("other"); [INFO] [stdout] | ----^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ownership_2.rs:26:10 [INFO] [stdout] | [INFO] [stdout] 26 | fn test3(mut s: &mut String) { [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/bin/ownership_2.rs:41:9 [INFO] [stdout] | [INFO] [stdout] 41 | let z = &mut kk; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `n` [INFO] [stdout] --> src/bin/ownership_2.rs:50:9 [INFO] [stdout] | [INFO] [stdout] 50 | let n = *(&num); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_n` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `deref_test` is never used [INFO] [stdout] --> src/bin/ownership_2.rs:31:4 [INFO] [stdout] | [INFO] [stdout] 31 | fn deref_test() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/bin/ownership_2.rs:55:8 [INFO] [stdout] | [INFO] [stdout] 55 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_x`, `get_x_3`, and `mixup` are never used [INFO] [stdout] --> src/bin/ownership_2.rs:62:8 [INFO] [stdout] | [INFO] [stdout] 60 | impl Point { [INFO] [stdout] | ---------------------- methods in this implementation [INFO] [stdout] 61 | // 返回引用，不涉及所有权 [INFO] [stdout] 62 | fn get_x(&self) -> &T { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 72 | fn get_x_3(self) -> T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 76 | fn mixup(self, p: Point) -> Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::process::id` [INFO] [stdout] --> src/bin/iter_3.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::process::id; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MutRefIterator2` is never constructed [INFO] [stdout] --> src/bin/iter_3.rs:97:8 [INFO] [stdout] | [INFO] [stdout] 97 | struct MutRefIterator2<'a> { [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] --> src/bin/iter_3.rs:218:4 [INFO] [stdout] | [INFO] [stdout] 218 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_get_mut` is never used [INFO] [stdout] --> src/bin/iter_3.rs:236:4 [INFO] [stdout] | [INFO] [stdout] 236 | fn test_get_mut(v: &mut Vec, i: usize) -> Option<&mut usize> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::fmt::format` [INFO] [stdout] --> src/bin/vector_2.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::format; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/closure_2.rs:72:9 [INFO] [stdout] | [INFO] [stdout] 72 | let mut s = String::new(); [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: function `fn_once_2` is never used [INFO] [stdout] --> src/bin/closure_2.rs:95:4 [INFO] [stdout] | [INFO] [stdout] 95 | fn fn_once_2(f: F) [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `m` [INFO] [stdout] --> src/bin/vector_2.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let m = String::new(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_m` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `l` [INFO] [stdout] --> src/bin/vector_2.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let l = "test".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_l` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `ll` [INFO] [stdout] --> src/bin/vector_2.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let ll = String::from("test"); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_ll` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let hello = String::from("السلام عليكم"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let hello = String::from("Dobrý den"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:10:9 [INFO] [stdout] | [INFO] [stdout] 10 | let hello = String::from("Hello"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | let hello = String::from("שָׁלוֹם"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 12 | let hello = String::from("नमस्ते"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/async_demo_close.rs:8:10 [INFO] [stdout] | [INFO] [stdout] 8 | async fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/deref_1.rs:15:22 [INFO] [stdout] | [INFO] [stdout] 15 | let Person { name, age } = &&&&&&&self; [INFO] [stdout] | ^^^^ help: try ignoring the field: `name: _` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `age` [INFO] [stdout] --> src/bin/deref_1.rs:15:28 [INFO] [stdout] | [INFO] [stdout] 15 | let Person { name, age } = &&&&&&&self; [INFO] [stdout] | ^^^ help: try ignoring the field: `age: _` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let hello = String::from("こんにちは"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `age` [INFO] [stdout] --> src/bin/deref_1.rs:14:35 [INFO] [stdout] | [INFO] [stdout] 14 | fn display(self: &mut Person, age: u8) { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_age` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let hello = String::from("안녕하세요"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let hello = String::from("你好"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | let hello = String::from("Olá"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | let hello = String::from("Здравствуйте"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/bin/vector_2.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let hello = String::from("Hola"); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cc` [INFO] [stdout] --> src/bin/deref_1.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | let cc = my_str_box.deref(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/deref_1.rs:61:9 [INFO] [stdout] | [INFO] [stdout] 61 | let s1: &str = &my_str_box; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/deref_1.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | let s1: &String = &my_str_box; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/deref_1.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | let s1: String = my_str_box.to_string(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/deref_1.rs:70:20 [INFO] [stdout] | [INFO] [stdout] 70 | fn receive_mut_box(s: &mut 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] --> src/bin/deref_1.rs:72:17 [INFO] [stdout] | [INFO] [stdout] 72 | fn receive_pstr(s: &str) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Person` is never constructed [INFO] [stdout] --> src/bin/deref_1.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | struct Person { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `display` are never used [INFO] [stdout] --> src/bin/deref_1.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl Person { [INFO] [stdout] | ----------- associated items in this implementation [INFO] [stdout] 10 | fn new(name: String, age: u8) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 14 | fn display(self: &mut Person, age: u8) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/async_demo_5_stream.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn test() { [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_stream_timeout` is never used [INFO] [stdout] --> src/bin/async_demo_5_stream.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn test_stream_timeout() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `send_recv` is never used [INFO] [stdout] --> src/bin/async_stream_1.rs:5:10 [INFO] [stdout] | [INFO] [stdout] 5 | async fn send_recv() { [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 `sum_with_next` is never used [INFO] [stdout] --> src/bin/async_stream_1.rs:20:10 [INFO] [stdout] | [INFO] [stdout] 20 | async fn sum_with_next(mut stream: Pin<&mut dyn Stream>) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `sum_with_try_next` is never used [INFO] [stdout] --> src/bin/async_stream_1.rs:29:10 [INFO] [stdout] | [INFO] [stdout] 29 | async fn sum_with_try_next( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `collections::HashMap`, `fmt::Display`, and `hash::Hash` [INFO] [stdout] --> src/bin/closure_1.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{collections::HashMap, fmt::Display, hash::Hash, thread, time::Duration}; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^ ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mbc` [INFO] [stdout] --> src/bin/cell_refcell_1.rs:86:9 [INFO] [stdout] | [INFO] [stdout] 86 | let mbc = c.borrow_mut(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_mbc` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `cell_from_mut` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn cell_from_mut() { [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 `refcell_inner_mut` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:50:4 [INFO] [stdout] | [INFO] [stdout] 50 | fn refcell_inner_mut() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_refcell` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:81:4 [INFO] [stdout] | [INFO] [stdout] 81 | fn test_refcell() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_cell` is never used [INFO] [stdout] --> src/bin/cell_refcell_1.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn test_cell() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/ownership.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expensive_closure` [INFO] [stdout] --> src/bin/closure_1.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let expensive_closure = |num: u32| { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expensive_closure` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mod_x` [INFO] [stdout] --> src/bin/closure_1.rs:51:9 [INFO] [stdout] | [INFO] [stdout] 51 | let mod_x = || print!("{:?}", x); //Fn [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_mod_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mod_x` [INFO] [stdout] --> src/bin/closure_1.rs:52:13 [INFO] [stdout] | [INFO] [stdout] 52 | let mut mod_x = || x.push(1); //FnMut [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_mod_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `mod_x` [INFO] [stdout] --> src/bin/closure_1.rs:53:9 [INFO] [stdout] | [INFO] [stdout] 53 | let mod_x = || x; //FnOnce [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_mod_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/closure_1.rs:52:9 [INFO] [stdout] | [INFO] [stdout] 52 | let mut mod_x = || x.push(1); //FnMut [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/vector_1.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | let mut v = vec![1, 2, 3, 4, 5, 6]; [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: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | let v = match &str_opt.value { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:32:13 [INFO] [stdout] | [INFO] [stdout] 32 | let v = match str_opt.value { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:45:13 [INFO] [stdout] | [INFO] [stdout] 45 | let v = match str_opt.value { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/ownership_3.rs:60:13 [INFO] [stdout] | [INFO] [stdout] 60 | let v = match s.raw_int { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `str_opt2` [INFO] [stdout] --> src/bin/ownership_3.rs:96:17 [INFO] [stdout] | [INFO] [stdout] 96 | let mut str_opt2 = &StrOpt { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_str_opt2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ownership_3.rs:96:13 [INFO] [stdout] | [INFO] [stdout] 96 | let mut str_opt2 = &StrOpt { [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: `z` [INFO] [stdout] --> src/bin/ownership_3.rs:134:21 [INFO] [stdout] | [INFO] [stdout] 134 | let z = (self.calc)(&arg); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Cache` is never constructed [INFO] [stdout] --> src/bin/ownership_3.rs:104:8 [INFO] [stdout] | [INFO] [stdout] 104 | struct Cache [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `get_value` are never used [INFO] [stdout] --> src/bin/ownership_3.rs:119:8 [INFO] [stdout] | [INFO] [stdout] 113 | / impl Cache [INFO] [stdout] 114 | | where [INFO] [stdout] 115 | | F: Fn(&K) -> V, [INFO] [stdout] 116 | | K: Eq + Hash + Clone, [INFO] [stdout] 117 | | V: Debug, [INFO] [stdout] | |_____________- associated items in this implementation [INFO] [stdout] 118 | { [INFO] [stdout] 119 | fn new(calc: F) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 126 | fn get_value(&mut self, arg: K) -> &V { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/bin/ownership_4.rs:11:9 [INFO] [stdout] | [INFO] [stdout] 11 | let z = t.a; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/rc_arc_1.rs:28:9 [INFO] [stdout] | [INFO] [stdout] 28 | let c = &s; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `rc` [INFO] [stdout] --> src/bin/rc_arc_1.rs:33:9 [INFO] [stdout] | [INFO] [stdout] 33 | let rc = Rc::new(s); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_rc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/rc_arc_1.rs:94:9 [INFO] [stdout] | [INFO] [stdout] 94 | let mut a = Rc::new(s); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/rc_arc_1.rs:97:9 [INFO] [stdout] | [INFO] [stdout] 97 | let mut b = Rc::clone(&a); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/rc_arc_1.rs:104:9 [INFO] [stdout] | [INFO] [stdout] 104 | let a = Box::new(s); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/rc_arc_1.rs:120:13 [INFO] [stdout] | [INFO] [stdout] 120 | let c = Rc::clone(&a); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_thread` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:26:4 [INFO] [stdout] | [INFO] [stdout] 26 | fn rc_thread() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_case` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn rc_case() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_deref_mut` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:92:4 [INFO] [stdout] | [INFO] [stdout] 92 | fn rc_deref_mut() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_1` is never used [INFO] [stdout] --> src/bin/rc_arc_1.rs:101:4 [INFO] [stdout] | [INFO] [stdout] 101 | fn test_1() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MiniTokio` is never constructed [INFO] [stdout] --> src/bin/async_mini_tokio.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 11 | struct MiniTokio { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type alias `Task` is never used [INFO] [stdout] --> src/bin/async_mini_tokio.rs:15:6 [INFO] [stdout] | [INFO] [stdout] 15 | type Task = Pin + Send>>; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `spawn`, and `run` are never used [INFO] [stdout] --> src/bin/async_mini_tokio.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl MiniTokio { [INFO] [stdout] | -------------- associated items in this implementation [INFO] [stdout] 18 | fn new() -> MiniTokio { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 25 | fn spawn(&mut self, future: F) [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 32 | fn run(&mut self) { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/hashmap.rs:68:9 [INFO] [stdout] | [INFO] [stdout] 68 | let a = if true { 1 } else { 2 }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_1` is never used [INFO] [stdout] --> src/bin/async_demo_2.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn test_1() { [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_2` is never used [INFO] [stdout] --> src/bin/async_demo_2.rs:20:4 [INFO] [stdout] | [INFO] [stdout] 20 | fn test_2() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `format` [INFO] [stdout] --> src/bin/trait_1.rs:1:25 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{Display, format}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> src/bin/proc_marcro_1.rs:11:17 [INFO] [stdout] | [INFO] [stdout] 11 | struct SomeData(u32, String); [INFO] [stdout] | -------- ^^^ ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing these fields [INFO] [stdout] = note: `SomeData` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `name` and `data` are never read [INFO] [stdout] --> src/bin/proc_marcro_1.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 14 | struct User { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 15 | name: String, [INFO] [stdout] | ^^^^ [INFO] [stdout] 16 | data: SomeData, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_a` [INFO] [stdout] --> src/bin/trait_1.rs:54:13 [INFO] [stdout] | [INFO] [stdout] 54 | fn notify_3(item_a: impl Summary, item_b: impl Summary) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_b` [INFO] [stdout] --> src/bin/trait_1.rs:54:35 [INFO] [stdout] | [INFO] [stdout] 54 | fn notify_3(item_a: impl Summary, item_b: impl Summary) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_a` [INFO] [stdout] --> src/bin/trait_1.rs:57:25 [INFO] [stdout] | [INFO] [stdout] 57 | fn notify_4(item_a: T, item_b: T) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item_b` [INFO] [stdout] --> src/bin/trait_1.rs:57:36 [INFO] [stdout] | [INFO] [stdout] 57 | fn notify_4(item_a: T, item_b: T) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_item_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item` [INFO] [stdout] --> src/bin/trait_1.rs:60:13 [INFO] [stdout] | [INFO] [stdout] 60 | fn notify_5(item: impl Summary + Display) {} [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_item` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item` [INFO] [stdout] --> src/bin/trait_1.rs:62:35 [INFO] [stdout] | [INFO] [stdout] 62 | fn notify_6(item: T) {} [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_item` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::pin::pin` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::pin::pin; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item` [INFO] [stdout] --> src/bin/trait_1.rs:65:16 [INFO] [stdout] | [INFO] [stdout] 65 | fn notify_7(item: T) [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_item` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify` is never used [INFO] [stdout] --> src/bin/trait_1.rs:44:4 [INFO] [stdout] | [INFO] [stdout] 44 | fn notify(item: impl Summary) { [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 `notify_2` is never used [INFO] [stdout] --> src/bin/trait_1.rs:49:4 [INFO] [stdout] | [INFO] [stdout] 49 | fn notify_2(item: T) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_3` is never used [INFO] [stdout] --> src/bin/trait_1.rs:54:4 [INFO] [stdout] | [INFO] [stdout] 54 | fn notify_3(item_a: impl Summary, item_b: impl Summary) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_4` is never used [INFO] [stdout] --> src/bin/trait_1.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn notify_4(item_a: T, item_b: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_5` is never used [INFO] [stdout] --> src/bin/trait_1.rs:60:4 [INFO] [stdout] | [INFO] [stdout] 60 | fn notify_5(item: impl Summary + Display) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_6` is never used [INFO] [stdout] --> src/bin/trait_1.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn notify_6(item: T) {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `notify_7` is never used [INFO] [stdout] --> src/bin/trait_1.rs:65:4 [INFO] [stdout] | [INFO] [stdout] 65 | fn notify_7(item: T) [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `returns_summarizable` is never used [INFO] [stdout] --> src/bin/trait_1.rs:94:4 [INFO] [stdout] | [INFO] [stdout] 94 | fn returns_summarizable(switch: bool) -> Box { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest_2` is never used [INFO] [stdout] --> src/bin/trait_1.rs:124:4 [INFO] [stdout] | [INFO] [stdout] 124 | fn largest_2(list: &Vec) -> T { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/bin/trait_1.rs:134:8 [INFO] [stdout] | [INFO] [stdout] 134 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/bin/trait_1.rs:140:8 [INFO] [stdout] | [INFO] [stdout] 139 | impl Point { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 140 | fn new() { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `test` is never used [INFO] [stdout] --> src/bin/trait_1.rs:147:8 [INFO] [stdout] | [INFO] [stdout] 146 | impl Point { [INFO] [stdout] | ----------------------------------- method in this implementation [INFO] [stdout] 147 | fn test(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/ptr_addr_1.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let mut str_opt = StrOpt { [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: `ccc` [INFO] [stdout] --> src/bin/temp_val_1.rs:48:9 [INFO] [stdout] | [INFO] [stdout] 48 | let ccc = t.c; [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_ccc` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `sync::Arc` [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | use std::{sync::Arc, time::Duration}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test1` is never used [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:3:4 [INFO] [stdout] | [INFO] [stdout] 3 | fn test1() { [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] --> src/bin/async_demo_3_chan.rs:15:4 [INFO] [stdout] | [INFO] [stdout] 15 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test3` is never used [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:39:4 [INFO] [stdout] | [INFO] [stdout] 39 | fn test3() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test4` is never used [INFO] [stdout] --> src/bin/async_demo_3_chan.rs:69:4 [INFO] [stdout] | [INFO] [stdout] 69 | fn test4() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `update_string_once` [INFO] [stdout] --> src/bin/closure_3.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | let update_string_once = |x: u32| x; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_update_string_once` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:76:9 [INFO] [stdout] | [INFO] [stdout] 76 | cx: &mut Context<'_>, [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:88:9 [INFO] [stdout] | [INFO] [stdout] 88 | cx: &mut Context<'_>, [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:95:41 [INFO] [stdout] | [INFO] [stdout] 95 | fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cx` [INFO] [stdout] --> src/bin/async_web_server.rs:99:41 [INFO] [stdout] | [INFO] [stdout] 99 | fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll> { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_cx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `out` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:52:9 [INFO] [stdout] | [INFO] [stdout] 52 | let out = tokio::select! { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_out` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/bin/reborrow.rs:15:9 [INFO] [stdout] | [INFO] [stdout] 15 | let x = Point { x: 1, y: 1 }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_length` is never used [INFO] [stdout] --> src/bin/reborrow.rs:46:4 [INFO] [stdout] | [INFO] [stdout] 46 | fn read_length(strings: &mut Vec) -> usize { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `ops::Deref` and `self` [INFO] [stdout] --> src/bin/pin_1.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | ops::Deref, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 5 | pin::{self, Pin}, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `addr` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:117:30 [INFO] [stdout] | [INFO] [stdout] 117 | let (socket, addr) = listener.accept().await?; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_addr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_1.rs:111:9 [INFO] [stdout] | [INFO] [stdout] 111 | let mut this1 = unsafe { test1.get_unchecked_mut() }; // 绕过编译器检查 [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_1.rs:112:9 [INFO] [stdout] | [INFO] [stdout] 112 | let mut this2 = unsafe { test2.get_unchecked_mut() }; // 绕过编译器检查 [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated functions `a3` and `a3_1` are never used [INFO] [stdout] --> src/bin/pin_1.rs:72:12 [INFO] [stdout] | [INFO] [stdout] 25 | impl Test { [INFO] [stdout] | --------- associated functions in this implementation [INFO] [stdout] ... [INFO] [stdout] 72 | fn a3(pin_self: Pin<&Self>) -> &str { [INFO] [stdout] | ^^ [INFO] [stdout] ... [INFO] [stdout] 77 | fn a3_1<'a>(pin_self: Pin<&'a Self>) -> &'a str { [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 `pin_test` is never used [INFO] [stdout] --> src/bin/pin_1.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn pin_test() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `init`, `a`, and `b` are never used [INFO] [stdout] --> src/bin/pin_1.rs:123:12 [INFO] [stdout] | [INFO] [stdout] 122 | impl Test { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 123 | fn new(s: &str) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 130 | fn init(&mut self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 134 | fn a(&self) -> &str { [INFO] [stdout] | ^ [INFO] [stdout] ... [INFO] [stdout] 138 | fn b(&self) -> &String { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `raw_point_value_move` is never used [INFO] [stdout] --> src/bin/pin_1.rs:165:4 [INFO] [stdout] | [INFO] [stdout] 165 | fn raw_point_value_move() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::num` [INFO] [stdout] --> src/bin/closure_4.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::num; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tx1` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:173:10 [INFO] [stdout] | [INFO] [stdout] 173 | let (tx1, mut rx1) = mpsc::channel(128); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tx1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tx2` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:174:10 [INFO] [stdout] | [INFO] [stdout] 174 | let (tx2, mut rx2) = mpsc::channel(128); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tx2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tx3` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:175:10 [INFO] [stdout] | [INFO] [stdout] 175 | let (tx3, mut rx3) = mpsc::channel(128); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tx3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::process::Output` [INFO] [stdout] --> src/bin/async_2.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::process::Output; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/async_demo_select_1.rs:199:10 [INFO] [stdout] | [INFO] [stdout] 199 | let (mut tx, mut rx) = mpsc::channel(128); [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: `future_one` [INFO] [stdout] --> src/bin/async_2.rs:55:13 [INFO] [stdout] | [INFO] [stdout] 55 | let future_one = async move { [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_future_one` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/bin/async_2.rs:5:10 [INFO] [stdout] | [INFO] [stdout] 5 | async fn foo() -> u8 { [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 `bar` is never used [INFO] [stdout] --> src/bin/async_2.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn bar() -> impl Future { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `blocks` is never used [INFO] [stdout] --> src/bin/async_2.rs:32:14 [INFO] [stdout] | [INFO] [stdout] 32 | async fn blocks() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `blocks_2` is never used [INFO] [stdout] --> src/bin/async_2.rs:52:14 [INFO] [stdout] | [INFO] [stdout] 52 | async fn blocks_2<'a>(my_string: &'a String) -> impl Future + 'a { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo` is never used [INFO] [stdout] --> src/bin/async_2.rs:77:14 [INFO] [stdout] | [INFO] [stdout] 77 | async fn foo(x: &u8) -> u8 { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `foo_expanded` is never used [INFO] [stdout] --> src/bin/async_2.rs:82:8 [INFO] [stdout] | [INFO] [stdout] 82 | fn foo_expanded<'a>(x: &'a u8) -> impl Future + 'a { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `good` is never used [INFO] [stdout] --> src/bin/async_2.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | fn good() -> impl Future + 'static { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `good2` is never used [INFO] [stdout] --> src/bin/async_2.rs:102:8 [INFO] [stdout] | [INFO] [stdout] 102 | fn good2() -> impl Future + 'static { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `borrow_x` is never used [INFO] [stdout] --> src/bin/async_2.rs:110:14 [INFO] [stdout] | [INFO] [stdout] 110 | async fn borrow_x(x: &u8) -> u8 { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `String::as_bytes` that must be used [INFO] [stdout] --> src/bin/async_2.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | z.as_bytes(); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 30 | let _ = z.as_bytes(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/async_demo_select_1.rs:235:10 [INFO] [stdout] | [INFO] [stdout] 235 | let (mut tx, mut rx) = tokio::sync::mpsc::channel(128); [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Arc` and `Thread` [INFO] [stdout] --> src/bin/chan_1.rs:2:12 [INFO] [stdout] | [INFO] [stdout] 2 | sync::{Arc, mpsc}, [INFO] [stdout] | ^^^ [INFO] [stdout] 3 | thread::{self, Thread}, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `combo` [INFO] [stdout] --> src/bin/drop_1.rs:34:9 [INFO] [stdout] | [INFO] [stdout] 34 | let combo = Combo { one: One, two: Two }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_combo` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `one` and `two` are never read [INFO] [stdout] --> src/bin/drop_1.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 16 | struct Combo { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 17 | one: One, [INFO] [stdout] | ^^^ [INFO] [stdout] 18 | two: Two, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `socket` [INFO] [stdout] --> src/bin/async_demo_select_1.rs:102:19 [INFO] [stdout] | [INFO] [stdout] 102 | fn process_socket(socket: TcpStream) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_socket` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `send_enum` is never used [INFO] [stdout] --> src/bin/chan_1.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn send_enum() { [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 `block_chan` is never used [INFO] [stdout] --> src/bin/chan_1.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn block_chan() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `send_some` is never used [INFO] [stdout] --> src/bin/chan_1.rs:56:4 [INFO] [stdout] | [INFO] [stdout] 56 | fn send_some() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/chan_1.rs:72:4 [INFO] [stdout] | [INFO] [stdout] 72 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `trans_ownership` is never used [INFO] [stdout] --> src/bin/chan_1.rs:110:4 [INFO] [stdout] | [INFO] [stdout] 110 | fn trans_ownership() { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `try_recv` is never used [INFO] [stdout] --> src/bin/chan_1.rs:125:4 [INFO] [stdout] | [INFO] [stdout] 125 | fn try_recv() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `recv_1` is never used [INFO] [stdout] --> src/bin/chan_1.rs:136:4 [INFO] [stdout] | [INFO] [stdout] 136 | fn recv_1() { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `DerefMut` and `Deref` [INFO] [stdout] --> src/bin/pin_2.rs:2:16 [INFO] [stdout] | [INFO] [stdout] 2 | use std::ops::{Deref, DerefMut}; [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: `ptr::swap` [INFO] [stdout] --> src/bin/pin_2.rs:3:21 [INFO] [stdout] | [INFO] [stdout] 3 | use std::{pin::Pin, ptr::swap}; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 24 | / s.send(Animal::Cat { [INFO] [stdout] 25 | | age: 8, [INFO] [stdout] 26 | | name: "zaizai".to_string(), [INFO] [stdout] 27 | | }); [INFO] [stdout] | |______^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 24 | let _ = s.send(Animal::Cat { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 28 | s.send(Animal::Dog("qdd")); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 28 | let _ = s.send(Animal::Dog("qdd")); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:42:9 [INFO] [stdout] | [INFO] [stdout] 42 | s.send("t"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 42 | let _ = s.send("t"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | s.send("a"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 44 | let _ = s.send("a"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | s.send("b"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 46 | let _ = s.send("b"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:61:9 [INFO] [stdout] | [INFO] [stdout] 61 | s.send("t"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 61 | let _ = s.send("t"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:62:9 [INFO] [stdout] | [INFO] [stdout] 62 | s.send("a"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 62 | let _ = s.send("a"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:63:9 [INFO] [stdout] | [INFO] [stdout] 63 | s.send("b"); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 63 | let _ = s.send("b"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | s2.send(str); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 101 | let _ = s2.send(str); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/chan_1.rs:116:9 [INFO] [stdout] | [INFO] [stdout] 116 | s.send(str); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 116 | let _ = s.send(str); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MySelect` is never constructed [INFO] [stdout] --> src/bin/async_demo_select_1.rs:17:8 [INFO] [stdout] | [INFO] [stdout] 17 | struct MySelect { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `test1` [INFO] [stdout] --> src/bin/pin_2.rs:46:13 [INFO] [stdout] | [INFO] [stdout] 46 | let mut test1 = test1.as_mut(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_test1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `test2` [INFO] [stdout] --> src/bin/pin_2.rs:47:13 [INFO] [stdout] | [INFO] [stdout] 47 | let mut test2 = test2.as_mut(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_test2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_2.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let mut test1 = test1.as_mut(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/pin_2.rs:47:9 [INFO] [stdout] | [INFO] [stdout] 47 | let mut test2 = test2.as_mut(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_select` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:40:10 [INFO] [stdout] | [INFO] [stdout] 40 | async fn test_select() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_my_select` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:85:10 [INFO] [stdout] | [INFO] [stdout] 85 | async fn test_my_select() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `process_socket` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:102:4 [INFO] [stdout] | [INFO] [stdout] 102 | fn process_socket(socket: TcpStream) {} [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_select_2` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:104:10 [INFO] [stdout] | [INFO] [stdout] 104 | async fn test_select_2() -> io::Result<()> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `race` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:136:10 [INFO] [stdout] | [INFO] [stdout] 136 | async fn race(data: &[u8], addr1: SocketAddr, addr2: SocketAddr) -> io::Result<()> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_loop_select` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:172:10 [INFO] [stdout] | [INFO] [stdout] 172 | async fn test_loop_select() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `action` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:188:10 [INFO] [stdout] | [INFO] [stdout] 188 | async fn action() {} [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `unpin_action` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:191:10 [INFO] [stdout] | [INFO] [stdout] 191 | async fn unpin_action() -> u32 { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_select_recover` is never used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:198:10 [INFO] [stdout] | [INFO] [stdout] 198 | async fn test_select_recover() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused implementer of `Future` that must be used [INFO] [stdout] --> src/bin/async_demo_select_1.rs:200:5 [INFO] [stdout] | [INFO] [stdout] 200 | tx.send(1); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: futures do nothing unless you `.await` or poll them [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `pin_heap` is never used [INFO] [stdout] --> src/bin/pin_2.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn pin_heap() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `a`, and `b` are never used [INFO] [stdout] --> src/bin/pin_2.rs:18:12 [INFO] [stdout] | [INFO] [stdout] 17 | impl Test { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 18 | fn new(txt: &str) -> Pin> { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 31 | fn a<'a>(self: Pin<&'a Self>) -> &'a str { [INFO] [stdout] | ^ [INFO] [stdout] ... [INFO] [stdout] 35 | fn b<'a>(self: Pin<&'a Self>) -> &'a String { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `pin_stack` is never used [INFO] [stdout] --> src/bin/pin_2.rs:55:4 [INFO] [stdout] | [INFO] [stdout] 55 | fn pin_stack() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new`, `init`, `a`, and `b` are never used [INFO] [stdout] --> src/bin/pin_2.rs:64:12 [INFO] [stdout] | [INFO] [stdout] 63 | impl Test { [INFO] [stdout] | --------- associated items in this implementation [INFO] [stdout] 64 | fn new(txt: &str) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 72 | fn init<'a>(self: Pin<&'a mut Self>) { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 78 | fn a<'a>(self: Pin<&'a Self>) -> &'a str { [INFO] [stdout] | ^ [INFO] [stdout] ... [INFO] [stdout] 82 | fn b<'a>(self: Pin<&'a Self>) -> &'a String { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `swap_move` is never used [INFO] [stdout] --> src/bin/pin_2.rs:109:4 [INFO] [stdout] | [INFO] [stdout] 109 | fn swap_move() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_pinned_ref` is never used [INFO] [stdout] --> src/bin/pin_2.rs:119:4 [INFO] [stdout] | [INFO] [stdout] 119 | fn move_pinned_ref(mut a: T, mut b: T) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_pinned_ref_unpin` is never used [INFO] [stdout] --> src/bin/pin_2.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn move_pinned_ref_unpin(mut a: T, mut b: T) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `move_pined_ref_2` is never used [INFO] [stdout] --> src/bin/pin_2.rs:143:4 [INFO] [stdout] | [INFO] [stdout] 143 | fn move_pined_ref_2() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_cond` is never used [INFO] [stdout] --> src/bin/thread_1.rs:33:4 [INFO] [stdout] | [INFO] [stdout] 33 | fn thread_cond() { [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 `thread_local` is never used [INFO] [stdout] --> src/bin/thread_1.rs:57:4 [INFO] [stdout] | [INFO] [stdout] 57 | fn thread_local() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_barrier` is never used [INFO] [stdout] --> src/bin/thread_1.rs:88:4 [INFO] [stdout] | [INFO] [stdout] 88 | fn thread_barrier() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `child_child_thread` is never used [INFO] [stdout] --> src/bin/thread_1.rs:105:4 [INFO] [stdout] | [INFO] [stdout] 105 | fn child_child_thread() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_spawn_move` is never used [INFO] [stdout] --> src/bin/thread_1.rs:123:4 [INFO] [stdout] | [INFO] [stdout] 123 | fn thread_spawn_move() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `thread_spawn` is never used [INFO] [stdout] --> src/bin/thread_1.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn thread_spawn() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> src/bin/box_1.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let f = arr_s.index(0); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/static_1.rs:70:9 [INFO] [stdout] | [INFO] [stdout] 70 | let c = 1; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/static_1.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | let mut v = "s13".to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/static_1.rs:71:9 [INFO] [stdout] | [INFO] [stdout] 71 | let mut v = "s13".to_string(); [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: static `REQUEST_RECV` is never used [INFO] [stdout] --> src/bin/static_1.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | static mut REQUEST_RECV: usize = 0; [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Config` is never constructed [INFO] [stdout] --> src/bin/static_1.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | struct Config { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static `CONFIG` is never used [INFO] [stdout] --> src/bin/static_1.rs:38:12 [INFO] [stdout] | [INFO] [stdout] 38 | static mut CONFIG: Option<&'static mut Config> = None; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static `CONFIG_2` is never used [INFO] [stdout] --> src/bin/static_1.rs:42:8 [INFO] [stdout] | [INFO] [stdout] 42 | static CONFIG_2: OnceLock = OnceLock::new(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test2` is never used [INFO] [stdout] --> src/bin/static_1.rs:44:4 [INFO] [stdout] | [INFO] [stdout] 44 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_box_leak` is never used [INFO] [stdout] --> src/bin/static_1.rs:60:4 [INFO] [stdout] | [INFO] [stdout] 60 | fn test_box_leak() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `first` [INFO] [stdout] --> src/bin/box_1.rs:43:10 [INFO] [stdout] | [INFO] [stdout] 43 | let (first, second) = (&arr[0], &arr[1]); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_first` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `second` [INFO] [stdout] --> src/bin/box_1.rs:43:17 [INFO] [stdout] | [INFO] [stdout] 43 | let (first, second) = (&arr[0], &arr[1]); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 28 | handle1.join(); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 28 | let _ = handle1.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:29:5 [INFO] [stdout] | [INFO] [stdout] 29 | handle2.join(); [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 29 | let _ = handle2.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `path` [INFO] [stdout] --> src/bin/error_r.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::{fs, path}; [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: `ops::Not` [INFO] [stdout] --> src/bin/error_r.rs:3:21 [INFO] [stdout] | [INFO] [stdout] 3 | use std::{fs::File, ops::Not}; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:80:5 [INFO] [stdout] | [INFO] [stdout] 80 | t.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 80 | let _ = t.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/thread_1.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | h.join(); [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 101 | let _ = h.join(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/box_1.rs:35:9 [INFO] [stdout] | [INFO] [stdout] 35 | let mut arr_s = vec!["1".to_string(), "2".to_string()]; [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: `arr1` [INFO] [stdout] --> src/bin/box_1.rs:109:9 [INFO] [stdout] | [INFO] [stdout] 109 | let arr1 = arr; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_arr1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arr2` [INFO] [stdout] --> src/bin/box_1.rs:111:9 [INFO] [stdout] | [INFO] [stdout] 111 | let arr2 = arr; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_arr2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `arr3` [INFO] [stdout] --> src/bin/box_1.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | let arr3 = arr; [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_arr3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/error_r.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let v = vec![1, 2, 3, 4]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `List` is never used [INFO] [stdout] --> src/bin/box_1.rs:97:14 [INFO] [stdout] | [INFO] [stdout] 97 | enum List { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `other` [INFO] [stdout] --> src/bin/error_r.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | other => panic!("error"), [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] help: if this is intentional, prefix it with an underscore [INFO] [stdout] | [INFO] [stdout] 18 | _other => panic!("error"), [INFO] [stdout] | + [INFO] [stdout] help: you might have meant to pattern match on the similarly named variant `Other` [INFO] [stdout] | [INFO] [stdout] 18 - other => panic!("error"), [INFO] [stdout] 18 + std::io::ErrorKind::Other => panic!("error"), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `DoubleRef` is never constructed [INFO] [stdout] --> src/bin/lifetime_2.rs:22:8 [INFO] [stdout] | [INFO] [stdout] 22 | struct DoubleRef<'a, 'b: 'a, T> { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Ref` is never constructed [INFO] [stdout] --> src/bin/lifetime_2.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | struct Ref<'a, T: 'a> { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test` is never used [INFO] [stdout] --> src/bin/lifetime_2.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn test() { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `get_value` is never used [INFO] [stdout] --> src/bin/lifetime_2.rs:45:12 [INFO] [stdout] | [INFO] [stdout] 44 | impl StrOpt { [INFO] [stdout] | ----------- method in this implementation [INFO] [stdout] 45 | fn get_value(&self) -> &String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/struct_r.rs:9:14 [INFO] [stdout] | [INFO] [stdout] 9 | struct Point(u32, u32); [INFO] [stdout] | ----- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 9 - struct Point(u32, u32); [INFO] [stdout] 9 + struct Point((), u32); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_w` and `area2` are never used [INFO] [stdout] --> src/bin/struct_r.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Rectangle { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 18 | fn get_w(&self) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 28 | fn area2(self, c: u32) -> u32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/bin/struct_r.rs:97:4 [INFO] [stdout] | [INFO] [stdout] 97 | fn build_user(email: String, name: String, active: bool) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `fmt::format` [INFO] [stdout] --> src/bin/async_echo_server.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | fmt::format, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `p` [INFO] [stdout] --> src/bin/generics_1.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let p = Point { x: 1, y: 2 }; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_p` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/bin/generics_1.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 3 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 4 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 5 | y: U, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_x` and `mixup` are never used [INFO] [stdout] --> src/bin/generics_1.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 8 | impl Point { [INFO] [stdout] | ---------------------- methods in this implementation [INFO] [stdout] 9 | fn get_x(&self) -> &T { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 13 | fn mixup(self, p: Point) -> Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> src/bin/generics_1.rs:34:4 [INFO] [stdout] | [INFO] [stdout] 34 | fn largest(list: &Vec) -> &T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest_2` is never used [INFO] [stdout] --> src/bin/generics_1.rs:43:4 [INFO] [stdout] | [INFO] [stdout] 43 | fn largest_2(list: &Vec) -> T { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `tokio::net::TcpStream` [INFO] [stdout] --> src/bin/async_io.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use tokio::net::TcpStream; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/async_io.rs:34:9 [INFO] [stdout] | [INFO] [stdout] 34 | let mut reader = b"hello"; [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: `v_iter` [INFO] [stdout] --> src/bin/iter_1.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let v_iter = v.iter(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_iter` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v_iter` [INFO] [stdout] --> src/bin/iter_1.rs:8:9 [INFO] [stdout] | [INFO] [stdout] 8 | let v_iter = v.iter_mut(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_v_iter` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/iter_1.rs:27:9 [INFO] [stdout] | [INFO] [stdout] 27 | let mut s_arr = ["8".to_string(), "9".to_string(), "10".to_string()]; [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: `some_int` [INFO] [stdout] --> src/bin/match_r.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | let some_int = Some(32); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_int` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_char` [INFO] [stdout] --> src/bin/match_r.rs:55:9 [INFO] [stdout] | [INFO] [stdout] 55 | let some_char = Some('b'); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/iter_1.rs:76:9 [INFO] [stdout] | [INFO] [stdout] 76 | let mut iter = v.iter(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `null_int` [INFO] [stdout] --> src/bin/match_r.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | let null_int: Option = None; [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_null_int` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `sim_for` is never used [INFO] [stdout] --> src/bin/iter_1.rs:86:4 [INFO] [stdout] | [INFO] [stdout] 86 | fn sim_for() { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Message` is never used [INFO] [stdout] --> src/bin/match_r.rs:1:6 [INFO] [stdout] | [INFO] [stdout] 1 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddrKind` is never used [INFO] [stdout] --> src/bin/match_r.rs:9:6 [INFO] [stdout] | [INFO] [stdout] 9 | enum IpAddrKind { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/match_r.rs:16:8 [INFO] [stdout] | [INFO] [stdout] 16 | V4(String), [INFO] [stdout] | -- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `IpAddr` 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 - V4(String), [INFO] [stdout] 16 + V4(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `V6` is never constructed [INFO] [stdout] --> src/bin/match_r.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 15 | enum IpAddr { [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] 16 | V4(String), [INFO] [stdout] 17 | V6(String), [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `USA` and `Japan` are never constructed [INFO] [stdout] --> src/bin/match_r.rs:23:5 [INFO] [stdout] | [INFO] [stdout] 21 | enum Holder { [INFO] [stdout] | ------ variants in this enum [INFO] [stdout] 22 | China, [INFO] [stdout] 23 | USA, [INFO] [stdout] | ^^^ [INFO] [stdout] 24 | Japan, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Holder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `BTC` and `ETH` are never constructed [INFO] [stdout] --> src/bin/match_r.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 27 | enum Coin { [INFO] [stdout] | ---- variants in this enum [INFO] [stdout] 28 | BTC, [INFO] [stdout] | ^^^ [INFO] [stdout] 29 | ETH, [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::slice::IterMut` that must be used [INFO] [stdout] --> src/bin/iter_1.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | a.iter_mut(); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 5 | let _ = a.iter_mut(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::pin::pin` [INFO] [stdout] --> src/bin/async_3.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::pin::pin; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `select_2` is never used [INFO] [stdout] --> src/bin/async_3.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn select_2() { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/bin/lifetime_3.rs:47:9 [INFO] [stdout] | [INFO] [stdout] 47 | let i = list.get_interface_2(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/lifetime_3.rs:69:9 [INFO] [stdout] | [INFO] [stdout] 69 | let c = get(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `manager` is never read [INFO] [stdout] --> src/bin/lifetime_3.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 1 | struct Interface<'a, 'b> { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 2 | manager: &'b mut Manager<'a>, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `noop` is never used [INFO] [stdout] --> src/bin/lifetime_3.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 5 | impl<'a, 'b> Interface<'a, 'b> { [INFO] [stdout] | ------------------------------ method in this implementation [INFO] [stdout] 6 | pub fn noop(self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `get` is never used [INFO] [stdout] --> src/bin/lifetime_3.rs:64:4 [INFO] [stdout] | [INFO] [stdout] 64 | fn get() -> &'static String { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `a` is never used [INFO] [stdout] --> src/bin/lifetime_3.rs:68:4 [INFO] [stdout] | [INFO] [stdout] 68 | fn a() { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `StreamExt` and `stream::FuturesUnordered` [INFO] [stdout] --> src/bin/async_demo_4_join.rs:7:15 [INFO] [stdout] | [INFO] [stdout] 7 | use futures::{StreamExt, stream::FuturesUnordered}; [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: `fmt::format` [INFO] [stdout] --> src/bin/async_mini_redis.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | fmt::format, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/send_sync_1.rs:6:14 [INFO] [stdout] | [INFO] [stdout] 6 | struct MyBox(*const u8); [INFO] [stdout] | ----- ^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `MyBox` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c` [INFO] [stdout] --> src/bin/async_demo_4_join.rs:38:13 [INFO] [stdout] | [INFO] [stdout] 38 | let c = pin!(async { true }); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_c` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `utils::HelloMacro` [INFO] [stdout] --> src/bin/marcro_1.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use utils::HelloMacro; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `one_ms` [INFO] [stdout] --> src/bin/async_demo_4_join.rs:84:13 [INFO] [stdout] | [INFO] [stdout] 84 | let one_ms = Duration::from_millis(1); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_one_ms` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test1` is never used [INFO] [stdout] --> src/bin/async_demo_4_join.rs:10:4 [INFO] [stdout] | [INFO] [stdout] 10 | fn test1() { [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] --> src/bin/async_demo_4_join.rs:30:4 [INFO] [stdout] | [INFO] [stdout] 30 | fn test2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test3_race` is never used [INFO] [stdout] --> src/bin/async_demo_4_join.rs:58:4 [INFO] [stdout] | [INFO] [stdout] 58 | fn test3_race() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `test_yidld` is never used [INFO] [stdout] --> src/bin/async_demo_4_join.rs:76:4 [INFO] [stdout] | [INFO] [stdout] 76 | fn test_yidld() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `cloned` [INFO] [stdout] --> src/bin/type_1.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let cloned = value.clone(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_cloned` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/type_1.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 18 | let mut a = &mut 0; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/type_1.rs:18:9 [INFO] [stdout] | [INFO] [stdout] 18 | let mut a = &mut 0; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/type_1.rs:19:9 [INFO] [stdout] | [INFO] [stdout] 19 | let mut b = &0; [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/bin/type_1.rs:21:27 [INFO] [stdout] | [INFO] [stdout] 21 | fn recive_2(t: T) {} [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `do_stuff` is never used [INFO] [stdout] --> src/bin/type_1.rs:9:8 [INFO] [stdout] | [INFO] [stdout] 9 | fn do_stuff(value: &T) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `page_title_2` is never used [INFO] [stdout] --> src/bin/async_demo_1.rs:38:4 [INFO] [stdout] | [INFO] [stdout] 38 | fn page_title_2(url: &str) -> impl Future> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized] target(s) in 4.85s [INFO] running `Command { std: "docker" "inspect" "9d2af0dc6dd572f487950e52f670253777ed1faa6621149504520c7bf72d184f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9d2af0dc6dd572f487950e52f670253777ed1faa6621149504520c7bf72d184f", kill_on_drop: false }` [INFO] [stdout] 9d2af0dc6dd572f487950e52f670253777ed1faa6621149504520c7bf72d184f