[INFO] cloning repository https://github.com/zachlefevre/rust-learning [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zachlefevre/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzachlefevre%2Frust-learning", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzachlefevre%2Frust-learning'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] d4861bc9640b00ef4705d2651b01fe4177da35f1 [INFO] checking zachlefevre/rust-learning against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzachlefevre%2Frust-learning" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/zachlefevre/rust-learning on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/zachlefevre/rust-learning [INFO] finished tweaking git repo https://github.com/zachlefevre/rust-learning [INFO] tweaked toml for git repo https://github.com/zachlefevre/rust-learning written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/zachlefevre/rust-learning already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 77cef729d38511742120439a24475a52be707db3fcdf3e3d2a0e467878086743 [INFO] running `Command { std: "docker" "start" "-a" "77cef729d38511742120439a24475a52be707db3fcdf3e3d2a0e467878086743", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "77cef729d38511742120439a24475a52be707db3fcdf3e3d2a0e467878086743", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "77cef729d38511742120439a24475a52be707db3fcdf3e3d2a0e467878086743", kill_on_drop: false }` [INFO] [stdout] 77cef729d38511742120439a24475a52be707db3fcdf3e3d2a0e467878086743 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 67382ef22b37a69b95e54a2a294df5735c7427e4e97fc32d33b743bdfa6147ea [INFO] running `Command { std: "docker" "start" "-a" "67382ef22b37a69b95e54a2a294df5735c7427e4e97fc32d33b743bdfa6147ea", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.155 [INFO] [stderr] Compiling proc-macro2 v1.0.86 [INFO] [stderr] Compiling unicode-ident v1.0.12 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling autocfg v1.3.0 [INFO] [stderr] Compiling parking_lot_core v0.9.10 [INFO] [stderr] Checking smallvec v1.13.2 [INFO] [stderr] Checking scopeguard v1.2.0 [INFO] [stderr] Compiling serde v1.0.203 [INFO] [stderr] Checking ppv-lite86 v0.2.17 [INFO] [stderr] Checking pin-project-lite v0.2.14 [INFO] [stderr] Checking bytes v1.6.0 [INFO] [stderr] Compiling lock_api v0.4.12 [INFO] [stderr] Compiling quote v1.0.36 [INFO] [stderr] Compiling syn v2.0.68 [INFO] [stderr] Checking getrandom v0.2.15 [INFO] [stderr] Checking mio v0.8.11 [INFO] [stderr] Checking socket2 v0.5.7 [INFO] [stderr] Checking signal-hook-registry v1.4.2 [INFO] [stderr] Checking num_cpus v1.16.0 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking parking_lot v0.12.3 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Compiling tokio-macros v2.3.0 [INFO] [stderr] Compiling serde_derive v1.0.203 [INFO] [stderr] Checking tokio v1.38.0 [INFO] [stderr] Checking practice v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/visitor.rs:34:30 [INFO] [stdout] | [INFO] [stdout] 34 | fn visit_name(&mut self, name: &ast::Name) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:38:30 [INFO] [stdout] | [INFO] [stdout] 38 | fn visit_stmt(&mut self, expr: &ast::Stmt) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:42:30 [INFO] [stdout] | [INFO] [stdout] 42 | fn visit_expr(&mut self, expr: &ast::Expr) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Interpreter` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:29:8 [INFO] [stdout] | [INFO] [stdout] 29 | struct Interpreter { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Stmt` is never used [INFO] [stdout] --> src/bin/visitor.rs:2:14 [INFO] [stdout] | [INFO] [stdout] 2 | pub enum Stmt { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Name` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:7:16 [INFO] [stdout] | [INFO] [stdout] 7 | pub struct Name(String); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Expr` is never used [INFO] [stdout] --> src/bin/visitor.rs:9:14 [INFO] [stdout] | [INFO] [stdout] 9 | pub enum Expr { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Visitor` is never used [INFO] [stdout] --> src/bin/visitor.rs:18:15 [INFO] [stdout] | [INFO] [stdout] 18 | pub trait Visitor { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `n` [INFO] [stdout] --> src/bin/memtake.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let n = std::mem::replace(&mut p1.name, "foo".to_string()); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_n` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/memtake.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let a = std::mem::take(&mut p1.age); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::iter::Chain` that must be used [INFO] [stdout] --> src/bin/chain.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | dbg!(vec![1, 2, 3, 4, 5].iter().chain(Some(8).iter())); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/3-channel-consume.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | t1.send(1).await; [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 7 | let _ = t1.send(1).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/3-channel-consume.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | t2.send(2).await; [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] 8 | let _ = t2.send(2).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/3-channel-consume.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | t3.send(3).await; [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] 9 | let _ = t3.send(3).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/mutx.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let v = m.lock(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `data` is never read [INFO] [stdout] --> src/bin/mutx.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | struct MtxGuard<'a, T> { [INFO] [stdout] | -------- field in this struct [INFO] [stdout] 6 | data: &'a T [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/choose_weighted.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | dbg!(v.choose_weighted(&mut rand::thread_rng(), |x| *x)); [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)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around assigned value [INFO] [stdout] --> src/bin/btreemap.rs:5:20 [INFO] [stdout] | [INFO] [stdout] 5 | let elements = (0..100); [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 5 - let elements = (0..100); [INFO] [stdout] 5 + let elements = 0..100; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `a` is never read [INFO] [stdout] --> src/bin/rename-serde.rs:6:28 [INFO] [stdout] | [INFO] [stdout] 5 | struct Foo { [INFO] [stdout] | --- field in this struct [INFO] [stdout] 6 | #[serde(rename="ayo")] a: i32 [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main2` is never used [INFO] [stdout] --> src/bin/select.rs:6:10 [INFO] [stdout] | [INFO] [stdout] 6 | async fn main2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main3` is never used [INFO] [stdout] --> src/bin/select.rs:19:10 [INFO] [stdout] | [INFO] [stdout] 19 | async fn main3() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main4` is never used [INFO] [stdout] --> src/bin/select.rs:38:10 [INFO] [stdout] | [INFO] [stdout] 38 | async fn main4() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/select.rs:24:9 [INFO] [stdout] | [INFO] [stdout] 24 | transmit1.send(1); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 24 | let _ = transmit1.send(1); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/select.rs:28:9 [INFO] [stdout] | [INFO] [stdout] 28 | transmit2.send(2); [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 _ = transmit2.send(2); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/select.rs:34:5 [INFO] [stdout] | [INFO] [stdout] 34 | dbg!(result); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Write` [INFO] [stdout] --> src/bin/vec_fns.rs:1:41 [INFO] [stdout] | [INFO] [stdout] 1 | use std::io::{BufReader, self, BufRead, Write, Read}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/vec_fns.rs:9:13 [INFO] [stdout] | [INFO] [stdout] 9 | let mut s = String::new(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/vec_fns.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut file = std::fs::File::open("vec_fns.rs").unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/vec_fns.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let mut s = String::new(); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/bin/index.rs:8:21 [INFO] [stdout] | [INFO] [stdout] 8 | fn index(&self, i: f32) -> &Self:: Output { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `sound` is never used [INFO] [stdout] --> src/bin/dispatches.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 1 | trait Animal { [INFO] [stdout] | ------ method in this trait [INFO] [stdout] 2 | fn sound(&self) -> String; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `sound` is never used [INFO] [stdout] --> src/bin/dispatches.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 1 | trait Animal { [INFO] [stdout] | ------ method in this trait [INFO] [stdout] 2 | fn sound(&self) -> String; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/vec_fns.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | bufreader.read_until(b'B', &mut v); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 14 | let _ = bufreader.read_until(b'B', &mut v); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/vec_fns.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 17 | dbg!(String::from_utf8(v)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/vec_fns.rs:19:5 [INFO] [stdout] | [INFO] [stdout] 19 | io::copy(&mut bufreader, &mut io::stderr()); [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] 19 | let _ = io::copy(&mut bufreader, &mut io::stderr()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/select-most-recent.rs:7:14 [INFO] [stdout] | [INFO] [stdout] 7 | Some(v) => Some("foo".into()) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/bin/asref.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let b = a.as_ref(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/mutx.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let v = m.lock(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `data` is never read [INFO] [stdout] --> src/bin/mutx.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | struct MtxGuard<'a, T> { [INFO] [stdout] | -------- field in this struct [INFO] [stdout] 6 | data: &'a T [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/foo.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | dbg!("12.8".parse::()); [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)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | stdout.write_all(&v[..]); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 6 | let _ = stdout.write_all(&v[..]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | stdout.write_all(v2); [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] 9 | let _ = stdout.write_all(v2); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | stdout.write_all(&v3[..]); [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] 12 | let _ = stdout.write_all(&v3[..]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 15 | write!(stdout, "write! writes a string literal\n"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 17 | write!(stdout, "{}", s); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Write` [INFO] [stdout] --> src/bin/vec_fns.rs:1:41 [INFO] [stdout] | [INFO] [stdout] 1 | use std::io::{BufReader, self, BufRead, Write, Read}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/vec_fns.rs:9:13 [INFO] [stdout] | [INFO] [stdout] 9 | let mut s = String::new(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/vec_fns.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut file = std::fs::File::open("vec_fns.rs").unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/vec_fns.rs:9:9 [INFO] [stdout] | [INFO] [stdout] 9 | let mut s = String::new(); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/vec_fns.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | bufreader.read_until(b'B', &mut v); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 14 | let _ = bufreader.read_until(b'B', &mut v); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/vec_fns.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 17 | dbg!(String::from_utf8(v)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/vec_fns.rs:19:5 [INFO] [stdout] | [INFO] [stdout] 19 | io::copy(&mut bufreader, &mut io::stderr()); [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] 19 | let _ = io::copy(&mut bufreader, &mut io::stderr()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `a` is never read [INFO] [stdout] --> src/bin/rename-serde.rs:6:28 [INFO] [stdout] | [INFO] [stdout] 5 | struct Foo { [INFO] [stdout] | --- field in this struct [INFO] [stdout] 6 | #[serde(rename="ayo")] a: i32 [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/strings.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let s1 = String::from(s); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> src/bin/strings.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let s2 = s.to_owned(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `m` [INFO] [stdout] --> src/bin/lifetimes.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let m = &array[0]; // just borrow out of the vector of strings [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_m` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Person` is never constructed [INFO] [stdout] --> src/bin/lifetimes.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 2 | struct Person { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `name` is never read [INFO] [stdout] --> src/bin/lifetimes.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 8 | struct Person2<'a> { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 9 | name: &'a str [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Person2` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main2` is never used [INFO] [stdout] --> src/bin/select.rs:6:10 [INFO] [stdout] | [INFO] [stdout] 6 | async fn main2() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main3` is never used [INFO] [stdout] --> src/bin/select.rs:19:10 [INFO] [stdout] | [INFO] [stdout] 19 | async fn main3() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main4` is never used [INFO] [stdout] --> src/bin/select.rs:38:10 [INFO] [stdout] | [INFO] [stdout] 38 | async fn main4() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/select.rs:24:9 [INFO] [stdout] | [INFO] [stdout] 24 | transmit1.send(1); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 24 | let _ = transmit1.send(1); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/select.rs:28:9 [INFO] [stdout] | [INFO] [stdout] 28 | transmit2.send(2); [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 _ = transmit2.send(2); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/select.rs:34:5 [INFO] [stdout] | [INFO] [stdout] 34 | dbg!(result); [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/typeclasses.rs:69:17 [INFO] [stdout] | [INFO] [stdout] 69 | let s = ai.0; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `FileDownloadRequest` is never constructed [INFO] [stdout] --> src/bin/typeclasses.rs:61:12 [INFO] [stdout] | [INFO] [stdout] 61 | struct FileDownloadRequest { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `mount_point` is never used [INFO] [stdout] --> src/bin/typeclasses.rs:66:12 [INFO] [stdout] | [INFO] [stdout] 65 | impl FileDownloadRequest { [INFO] [stdout] | --------------------------------------- method in this implementation [INFO] [stdout] 66 | fn mount_point(&self) -> &String { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `other` is never used [INFO] [stdout] --> src/bin/typeclasses.rs:75:12 [INFO] [stdout] | [INFO] [stdout] 74 | impl FileDownloadRequest { [INFO] [stdout] | ----------------------------------------- method in this implementation [INFO] [stdout] 75 | fn other(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/typeclasses.rs:6:29 [INFO] [stdout] | [INFO] [stdout] 6 | pub struct AuthInfo(pub String); [INFO] [stdout] | -------- ^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `AuthInfo` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/typeclasses.rs:10:29 [INFO] [stdout] | [INFO] [stdout] 10 | pub struct AuthInfo(pub i32); [INFO] [stdout] | -------- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `chunk_size` and `bitrate` are never read [INFO] [stdout] --> src/bin/typeclasses.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 17 | pub struct TransferParameters { [INFO] [stdout] | ------------------ fields in this struct [INFO] [stdout] 18 | chunk_size: u32, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 19 | bitrate: u32, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `auth_info` and `transfer_parameters` are never used [INFO] [stdout] --> src/bin/typeclasses.rs:24:16 [INFO] [stdout] | [INFO] [stdout] 22 | pub trait Protocol { [INFO] [stdout] | -------- methods in this trait [INFO] [stdout] 23 | type AuthInfo; [INFO] [stdout] 24 | fn auth_info(&self) -> Self::AuthInfo; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] 25 | [INFO] [stdout] 26 | fn transfer_parameters(&self) -> TransferParameters; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `mount_point` is never read [INFO] [stdout] --> src/bin/typeclasses.rs:31:17 [INFO] [stdout] | [INFO] [stdout] 29 | pub struct Nfs { [INFO] [stdout] | --- field in this struct [INFO] [stdout] 30 | auth: AuthInfo, [INFO] [stdout] 31 | pub mount_point: String, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `n` [INFO] [stdout] --> src/bin/memtake.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let n = std::mem::replace(&mut p1.name, "foo".to_string()); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_n` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/memtake.rs:7:9 [INFO] [stdout] | [INFO] [stdout] 7 | let a = std::mem::take(&mut p1.age); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/choose_weighted.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | dbg!(v.choose_weighted(&mut rand::thread_rng(), |x| *x)); [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)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `EnglishClass` is never constructed [INFO] [stdout] --> src/bin/folder.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 8 | enum Classroom { [INFO] [stdout] | --------- variant in this enum [INFO] [stdout] 9 | ScienceLab { num_beakers: i32, eyewash: bool}, [INFO] [stdout] 10 | EnglishClass { num_books: i32 } [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Classroom` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/foo.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | dbg!("12.8".parse::()); [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)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Chunks` that must be used [INFO] [stdout] --> src/bin/chunk.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | dbg!(vec![1, 2, 3, 4, 5, 6, 7, 8].chunks(3)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` in tuple element 0 that must be used [INFO] [stdout] --> src/bin/join.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | dbg!(tokio::join!(tokio::spawn(a), tokio::spawn(b), tokio::spawn(c))); [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)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` in tuple element 1 that must be used [INFO] [stdout] --> src/bin/join.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | dbg!(tokio::join!(tokio::spawn(a), tokio::spawn(b), tokio::spawn(c))); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` in tuple element 2 that must be used [INFO] [stdout] --> src/bin/join.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | dbg!(tokio::join!(tokio::spawn(a), tokio::spawn(b), tokio::spawn(c))); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/visitor.rs:34:30 [INFO] [stdout] | [INFO] [stdout] 34 | fn visit_name(&mut self, name: &ast::Name) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:38:30 [INFO] [stdout] | [INFO] [stdout] 38 | fn visit_stmt(&mut self, expr: &ast::Stmt) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:42:30 [INFO] [stdout] | [INFO] [stdout] 42 | fn visit_expr(&mut self, expr: &ast::Expr) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Interpreter` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:29:8 [INFO] [stdout] | [INFO] [stdout] 29 | struct Interpreter { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> src/bin/visitor.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn main () { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Stmt` is never used [INFO] [stdout] --> src/bin/visitor.rs:2:14 [INFO] [stdout] | [INFO] [stdout] 2 | pub enum Stmt { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/bin/select-most-recent.rs:7:14 [INFO] [stdout] | [INFO] [stdout] 7 | Some(v) => Some("foo".into()) [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Name` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:7:16 [INFO] [stdout] | [INFO] [stdout] 7 | pub struct Name(String); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Expr` is never used [INFO] [stdout] --> src/bin/visitor.rs:9:14 [INFO] [stdout] | [INFO] [stdout] 9 | pub enum Expr { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Visitor` is never used [INFO] [stdout] --> src/bin/visitor.rs:18:15 [INFO] [stdout] | [INFO] [stdout] 18 | pub trait Visitor { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/visitor.rs:34:30 [INFO] [stdout] | [INFO] [stdout] 34 | fn visit_name(&mut self, name: &ast::Name) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:38:30 [INFO] [stdout] | [INFO] [stdout] 38 | fn visit_stmt(&mut self, expr: &ast::Stmt) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:42:30 [INFO] [stdout] | [INFO] [stdout] 42 | fn visit_expr(&mut self, expr: &ast::Expr) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Interpreter` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:29:8 [INFO] [stdout] | [INFO] [stdout] 29 | struct Interpreter { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Stmt` is never used [INFO] [stdout] --> src/bin/visitor.rs:2:14 [INFO] [stdout] | [INFO] [stdout] 2 | pub enum Stmt { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Name` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:7:16 [INFO] [stdout] | [INFO] [stdout] 7 | pub struct Name(String); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Expr` is never used [INFO] [stdout] --> src/bin/visitor.rs:9:14 [INFO] [stdout] | [INFO] [stdout] 9 | pub enum Expr { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Visitor` is never used [INFO] [stdout] --> src/bin/visitor.rs:18:15 [INFO] [stdout] | [INFO] [stdout] 18 | pub trait Visitor { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | stdout.write_all(&v[..]); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 6 | let _ = stdout.write_all(&v[..]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | stdout.write_all(v2); [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] 9 | let _ = stdout.write_all(v2); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:12:5 [INFO] [stdout] | [INFO] [stdout] 12 | stdout.write_all(&v3[..]); [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] 12 | let _ = stdout.write_all(&v3[..]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 15 | write!(stdout, "write! writes a string literal\n"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/stdout.rs:17:5 [INFO] [stdout] | [INFO] [stdout] 17 | write!(stdout, "{}", s); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/bin/strings.rs:13:9 [INFO] [stdout] | [INFO] [stdout] 13 | let s1 = String::from(s); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> src/bin/strings.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let s2 = s.to_owned(); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/bin/asref.rs:3:9 [INFO] [stdout] | [INFO] [stdout] 3 | let b = a.as_ref(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `dothingErrors` should have an upper camel case name [INFO] [stdout] --> src/bin/consumed_arg_err.rs:1:6 [INFO] [stdout] | [INFO] [stdout] 1 | enum dothingErrors { [INFO] [stdout] | ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DothingErrors` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Chunks` that must be used [INFO] [stdout] --> src/bin/chunk.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | dbg!(vec![1, 2, 3, 4, 5, 6, 7, 8].chunks(3)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/consumed_arg_err.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | / retry(s, dothing, |e| { [INFO] [stdout] 21 | | match e { [INFO] [stdout] 22 | | dothingErrors::SomethingWentWrong(e) => e [INFO] [stdout] 23 | | } [INFO] [stdout] 24 | | }, 1); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 20 | let _ = retry(s, dothing, |e| { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around assigned value [INFO] [stdout] --> src/bin/btreemap.rs:5:20 [INFO] [stdout] | [INFO] [stdout] 5 | let elements = (0..100); [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 5 - let elements = (0..100); [INFO] [stdout] 5 + let elements = 0..100; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `name` [INFO] [stdout] --> src/bin/visitor.rs:34:30 [INFO] [stdout] | [INFO] [stdout] 34 | fn visit_name(&mut self, name: &ast::Name) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_name` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:38:30 [INFO] [stdout] | [INFO] [stdout] 38 | fn visit_stmt(&mut self, expr: &ast::Stmt) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `expr` [INFO] [stdout] --> src/bin/visitor.rs:42:30 [INFO] [stdout] | [INFO] [stdout] 42 | fn visit_expr(&mut self, expr: &ast::Expr) -> i64 { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_expr` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Interpreter` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:29:8 [INFO] [stdout] | [INFO] [stdout] 29 | struct Interpreter { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `main` is never used [INFO] [stdout] --> src/bin/visitor.rs:48:4 [INFO] [stdout] | [INFO] [stdout] 48 | fn main () { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Stmt` is never used [INFO] [stdout] --> src/bin/visitor.rs:2:14 [INFO] [stdout] | [INFO] [stdout] 2 | pub enum Stmt { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Name` is never constructed [INFO] [stdout] --> src/bin/visitor.rs:7:16 [INFO] [stdout] | [INFO] [stdout] 7 | pub struct Name(String); [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Expr` is never used [INFO] [stdout] --> src/bin/visitor.rs:9:14 [INFO] [stdout] | [INFO] [stdout] 9 | pub enum Expr { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Visitor` is never used [INFO] [stdout] --> src/bin/visitor.rs:18:15 [INFO] [stdout] | [INFO] [stdout] 18 | pub trait Visitor { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/bin/index.rs:8:21 [INFO] [stdout] | [INFO] [stdout] 8 | fn index(&self, i: f32) -> &Self:: Output { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::iter::Chain` that must be used [INFO] [stdout] --> src/bin/chain.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | dbg!(vec![1, 2, 3, 4, 5].iter().chain(Some(8).iter())); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: iterators are lazy and do nothing unless consumed [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `m` [INFO] [stdout] --> src/bin/lifetimes.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let m = &array[0]; // just borrow out of the vector of strings [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_m` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated type alias `std::panic::PanicInfo`: use `PanicHookInfo` instead [INFO] [stdout] --> src/bin/panic_handler.rs:1:17 [INFO] [stdout] | [INFO] [stdout] 1 | use std::panic::PanicInfo; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated type alias `std::panic::PanicInfo`: use `PanicHookInfo` instead [INFO] [stdout] --> src/bin/panic_handler.rs:5:25 [INFO] [stdout] | [INFO] [stdout] 5 | fn panic_handler(info: &PanicInfo) -> ! { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `info` [INFO] [stdout] --> src/bin/panic_handler.rs:5:18 [INFO] [stdout] | [INFO] [stdout] 5 | fn panic_handler(info: &PanicInfo) -> ! { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_info` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Person` is never constructed [INFO] [stdout] --> src/bin/lifetimes.rs:2:8 [INFO] [stdout] | [INFO] [stdout] 2 | struct Person { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `name` is never read [INFO] [stdout] --> src/bin/lifetimes.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 8 | struct Person2<'a> { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 9 | name: &'a str [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Person2` 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 `panic_handler` is never used [INFO] [stdout] --> src/bin/panic_handler.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn panic_handler(info: &PanicInfo) -> ! { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `dothingErrors` should have an upper camel case name [INFO] [stdout] --> src/bin/consumed_arg_err.rs:1:6 [INFO] [stdout] | [INFO] [stdout] 1 | enum dothingErrors { [INFO] [stdout] | ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DothingErrors` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/bin/typeclasses.rs:69:17 [INFO] [stdout] | [INFO] [stdout] 69 | let s = ai.0; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `FileDownloadRequest` is never constructed [INFO] [stdout] --> src/bin/typeclasses.rs:61:12 [INFO] [stdout] | [INFO] [stdout] 61 | struct FileDownloadRequest { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `mount_point` is never used [INFO] [stdout] --> src/bin/typeclasses.rs:66:12 [INFO] [stdout] | [INFO] [stdout] 65 | impl FileDownloadRequest { [INFO] [stdout] | --------------------------------------- method in this implementation [INFO] [stdout] 66 | fn mount_point(&self) -> &String { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `other` is never used [INFO] [stdout] --> src/bin/typeclasses.rs:75:12 [INFO] [stdout] | [INFO] [stdout] 74 | impl FileDownloadRequest { [INFO] [stdout] | ----------------------------------------- method in this implementation [INFO] [stdout] 75 | fn other(&self) -> i32 { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/typeclasses.rs:6:29 [INFO] [stdout] | [INFO] [stdout] 6 | pub struct AuthInfo(pub String); [INFO] [stdout] | -------- ^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] = note: `AuthInfo` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/bin/typeclasses.rs:10:29 [INFO] [stdout] | [INFO] [stdout] 10 | pub struct AuthInfo(pub i32); [INFO] [stdout] | -------- ^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this struct [INFO] [stdout] | [INFO] [stdout] = help: consider removing this field [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `chunk_size` and `bitrate` are never read [INFO] [stdout] --> src/bin/typeclasses.rs:18:13 [INFO] [stdout] | [INFO] [stdout] 17 | pub struct TransferParameters { [INFO] [stdout] | ------------------ fields in this struct [INFO] [stdout] 18 | chunk_size: u32, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 19 | bitrate: u32, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `auth_info` and `transfer_parameters` are never used [INFO] [stdout] --> src/bin/typeclasses.rs:24:16 [INFO] [stdout] | [INFO] [stdout] 22 | pub trait Protocol { [INFO] [stdout] | -------- methods in this trait [INFO] [stdout] 23 | type AuthInfo; [INFO] [stdout] 24 | fn auth_info(&self) -> Self::AuthInfo; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] 25 | [INFO] [stdout] 26 | fn transfer_parameters(&self) -> TransferParameters; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `mount_point` is never read [INFO] [stdout] --> src/bin/typeclasses.rs:31:17 [INFO] [stdout] | [INFO] [stdout] 29 | pub struct Nfs { [INFO] [stdout] | --- field in this struct [INFO] [stdout] 30 | auth: AuthInfo, [INFO] [stdout] 31 | pub mount_point: String, [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated type alias `std::panic::PanicInfo`: use `PanicHookInfo` instead [INFO] [stdout] --> src/bin/panic_handler.rs:1:17 [INFO] [stdout] | [INFO] [stdout] 1 | use std::panic::PanicInfo; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(deprecated)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/3-channel-consume.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | t1.send(1).await; [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 7 | let _ = t1.send(1).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: use of deprecated type alias `std::panic::PanicInfo`: use `PanicHookInfo` instead [INFO] [stdout] --> src/bin/panic_handler.rs:5:25 [INFO] [stdout] | [INFO] [stdout] 5 | fn panic_handler(info: &PanicInfo) -> ! { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `info` [INFO] [stdout] --> src/bin/panic_handler.rs:5:18 [INFO] [stdout] | [INFO] [stdout] 5 | fn panic_handler(info: &PanicInfo) -> ! { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_info` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/3-channel-consume.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | t2.send(2).await; [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] 8 | let _ = t2.send(2).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `panic_handler` is never used [INFO] [stdout] --> src/bin/panic_handler.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn panic_handler(info: &PanicInfo) -> ! { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/3-channel-consume.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | t3.send(3).await; [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] 9 | let _ = t3.send(3).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/bin/consumed_arg_err.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | / retry(s, dothing, |e| { [INFO] [stdout] 21 | | match e { [INFO] [stdout] 22 | | dothingErrors::SomethingWentWrong(e) => e [INFO] [stdout] 23 | | } [INFO] [stdout] 24 | | }, 1); [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)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 20 | let _ = retry(s, dothing, |e| { [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `EnglishClass` is never constructed [INFO] [stdout] --> src/bin/folder.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 8 | enum Classroom { [INFO] [stdout] | --------- variant in this enum [INFO] [stdout] 9 | ScienceLab { num_beakers: i32, eyewash: bool}, [INFO] [stdout] 10 | EnglishClass { num_books: i32 } [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Classroom` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` in tuple element 0 that must be used [INFO] [stdout] --> src/bin/join.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | dbg!(tokio::join!(tokio::spawn(a), tokio::spawn(b), tokio::spawn(c))); [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)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` in tuple element 1 that must be used [INFO] [stdout] --> src/bin/join.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | dbg!(tokio::join!(tokio::spawn(a), tokio::spawn(b), tokio::spawn(c))); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` in tuple element 2 that must be used [INFO] [stdout] --> src/bin/join.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 21 | dbg!(tokio::join!(tokio::spawn(a), tokio::spawn(b), tokio::spawn(c))); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.87s [INFO] running `Command { std: "docker" "inspect" "67382ef22b37a69b95e54a2a294df5735c7427e4e97fc32d33b743bdfa6147ea", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "67382ef22b37a69b95e54a2a294df5735c7427e4e97fc32d33b743bdfa6147ea", kill_on_drop: false }` [INFO] [stdout] 67382ef22b37a69b95e54a2a294df5735c7427e4e97fc32d33b743bdfa6147ea