[INFO] cloning repository https://github.com/sss-mykw/Rust-Programming-launguage [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sss-mykw/Rust-Programming-launguage" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsss-mykw%2FRust-Programming-launguage", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsss-mykw%2FRust-Programming-launguage'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ee3f8a703bbbc8e5c94a38dc71cf7c42fc90cb88 [INFO] testing sss-mykw/Rust-Programming-launguage against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsss-mykw%2FRust-Programming-launguage" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/sss-mykw/Rust-Programming-launguage [INFO] finished tweaking git repo https://github.com/sss-mykw/Rust-Programming-launguage [INFO] tweaked toml for git repo https://github.com/sss-mykw/Rust-Programming-launguage written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/sss-mykw/Rust-Programming-launguage on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/sss-mykw/Rust-Programming-launguage 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 5afb4fef04e82064fdf0291f6fde7052d941325efb31d9011bbf00c508983f20 [INFO] running `Command { std: "docker" "start" "-a" "5afb4fef04e82064fdf0291f6fde7052d941325efb31d9011bbf00c508983f20", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "5afb4fef04e82064fdf0291f6fde7052d941325efb31d9011bbf00c508983f20", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5afb4fef04e82064fdf0291f6fde7052d941325efb31d9011bbf00c508983f20", kill_on_drop: false }` [INFO] [stdout] 5afb4fef04e82064fdf0291f6fde7052d941325efb31d9011bbf00c508983f20 [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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] cfaa8dafe37f9690833e3cef16010a473f6dd07bcbc7dc7f686fa39da9a823c6 [INFO] running `Command { std: "docker" "start" "-a" "cfaa8dafe37f9690833e3cef16010a473f6dd07bcbc7dc7f686fa39da9a823c6", kill_on_drop: false }` [INFO] [stderr] Compiling rust-programming-language v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::thread::Thread` [INFO] [stdout] --> src/chapter20/mod.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::thread::Thread; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user3` [INFO] [stdout] --> src/chapter5/main.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let user3 = User { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_5_1` is never used [INFO] [stdout] --> src/chapter5/main.rs:6:4 [INFO] [stdout] | [INFO] [stdout] 6 | fn practice_5_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/chapter5/main.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn build_user(email: String, username: String) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/chapter5/main.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 32 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `format` [INFO] [stdout] --> src/chapter10/main.rs:1:16 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{format, Debug, Display}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `spaces` [INFO] [stdout] --> src/chapter3/main.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 43 | let spaces = spaces.len(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/chapter3/main.rs:78:14 [INFO] [stdout] | [INFO] [stdout] 78 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/chapter3/main.rs:78:20 [INFO] [stdout] | [INFO] [stdout] 78 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/chapter3/main.rs:123:13 [INFO] [stdout] | [INFO] [stdout] 123 | let y = 6; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `MAX_POINTS` is never used [INFO] [stdout] --> src/chapter3/main.rs:4:7 [INFO] [stdout] | [INFO] [stdout] 4 | const MAX_POINTS: u32 = 100_000; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_3_1` is never used [INFO] [stdout] --> src/chapter3/main.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn practice_3_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_3_2` is never used [INFO] [stdout] --> src/chapter3/main.rs:47:4 [INFO] [stdout] | [INFO] [stdout] 47 | fn practice_3_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_3_3` is never used [INFO] [stdout] --> src/chapter3/main.rs:113:4 [INFO] [stdout] | [INFO] [stdout] 113 | fn practice_3_3() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `print_labeled_measurement` is never used [INFO] [stdout] --> src/chapter3/main.rs:141:4 [INFO] [stdout] | [INFO] [stdout] 141 | fn print_labeled_measurement(value: i32, unit_label: char) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/chapter3/main.rs:145:4 [INFO] [stdout] | [INFO] [stdout] 145 | fn plus_one(x: i32) -> i32 { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Error` [INFO] [stdout] --> src/chapter9/main.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{Error, Read}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::Result as IoResult` [INFO] [stdout] --> src/chapter7/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::io::Result as IoResult; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `cmp::Ordering` and `io` [INFO] [stdout] --> src/chapter7/main.rs:9:11 [INFO] [stdout] | [INFO] [stdout] 9 | use std::{cmp::Ordering, io}; [INFO] [stdout] | ^^^^^^^^^^^^^ ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `point` [INFO] [stdout] --> src/chapter10/main.rs:12:13 [INFO] [stdout] | [INFO] [stdout] 12 | let point = Point { x: 5, y: 10 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_point` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `point` [INFO] [stdout] --> src/chapter10/main.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | let point = Point { x: 1.0, y: 4.0 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_point` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item1` [INFO] [stdout] --> src/chapter10/main.rs:118:35 [INFO] [stdout] | [INFO] [stdout] 118 | pub fn notify_complex(item1: &T, item2: &T) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item2` [INFO] [stdout] --> src/chapter10/main.rs:118:46 [INFO] [stdout] | [INFO] [stdout] 118 | pub fn notify_complex(item1: &T, item2: &T) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/chapter10/main.rs:122:24 [INFO] [stdout] | [INFO] [stdout] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/chapter10/main.rs:122:31 [INFO] [stdout] | [INFO] [stdout] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `result` is assigned to, but never used [INFO] [stdout] --> src/chapter10/main.rs:175:13 [INFO] [stdout] | [INFO] [stdout] 175 | let result; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_result` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/chapter10/main.rs:178:13 [INFO] [stdout] | [INFO] [stdout] 178 | result = longest(string1.as_str(), string2.as_str()); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `home` [INFO] [stdout] --> src/chapter6/main.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let home = IpAddr::V4(127, 0, 0, 1); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_home` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `loopback` [INFO] [stdout] --> src/chapter6/main.rs:11:13 [INFO] [stdout] | [INFO] [stdout] 11 | let loopback = IpAddr::V6(String::from("::1")); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/chapter6/main.rs:21:13 [INFO] [stdout] | [INFO] [stdout] 21 | let x: i8 = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/chapter6/main.rs:22:13 [INFO] [stdout] | [INFO] [stdout] 22 | let y: Option = Some(5); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_10_1` is never used [INFO] [stdout] --> src/chapter10/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn practice_10_1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/chapter10/main.rs:26:8 [INFO] [stdout] | [INFO] [stdout] 26 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> src/chapter10/main.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 31 | impl Point { [INFO] [stdout] | ----------------- method in this implementation [INFO] [stdout] 32 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_10_2` is never used [INFO] [stdout] --> src/chapter10/main.rs:37:4 [INFO] [stdout] | [INFO] [stdout] 37 | fn practice_10_2() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `some_function` is never used [INFO] [stdout] --> src/chapter10/main.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Pair` is never constructed [INFO] [stdout] --> src/chapter10/main.rs:127:8 [INFO] [stdout] | [INFO] [stdout] 127 | struct Pair { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/chapter10/main.rs:133:8 [INFO] [stdout] | [INFO] [stdout] 132 | impl Pair { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 133 | fn new(x: T, y: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `cmp_display` is never used [INFO] [stdout] --> src/chapter10/main.rs:140:8 [INFO] [stdout] | [INFO] [stdout] 139 | impl Pair { [INFO] [stdout] | -------------------------------------- method in this implementation [INFO] [stdout] 140 | fn cmp_display(&self) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_6_1` is never used [INFO] [stdout] --> src/chapter6/main.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn practice_6_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddr` is never used [INFO] [stdout] --> src/chapter6/main.rs:29:6 [INFO] [stdout] | [INFO] [stdout] 29 | enum IpAddr { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Message` is never used [INFO] [stdout] --> src/chapter6/main.rs:35:6 [INFO] [stdout] | [INFO] [stdout] 35 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `call` is never used [INFO] [stdout] --> src/chapter6/main.rs:43:8 [INFO] [stdout] | [INFO] [stdout] 42 | impl Message { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 43 | fn call(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_9_1` is never used [INFO] [stdout] --> src/chapter9/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn practice_9_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> src/chapter4/main.rs:11:13 [INFO] [stdout] | [INFO] [stdout] 11 | let s2 = s1; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::rc::Rc` [INFO] [stdout] --> src/chapter16/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::rc::Rc; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_6_2` is never used [INFO] [stdout] --> src/chapter6/main.rs:61:4 [INFO] [stdout] | [INFO] [stdout] 61 | fn practice_6_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Penny`, `Dime`, and `Quarter` are never constructed [INFO] [stdout] --> src/chapter6/main.rs:97:5 [INFO] [stdout] | [INFO] [stdout] 96 | enum Coin { [INFO] [stdout] | ---- variants in this enum [INFO] [stdout] 97 | Penny, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 98 | Nickel, [INFO] [stdout] 99 | Dime, [INFO] [stdout] | ^^^^ [INFO] [stdout] 100 | Quarter(UsState), [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `value_in_cents` is never used [INFO] [stdout] --> src/chapter6/main.rs:103:4 [INFO] [stdout] | [INFO] [stdout] 103 | fn value_in_cents(coin: Coin) -> u32 { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed [INFO] [stdout] --> src/chapter6/main.rs:117:5 [INFO] [stdout] | [INFO] [stdout] 116 | enum UsState { [INFO] [stdout] | ------- variants in this enum [INFO] [stdout] 117 | Alabama, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 118 | Alaska, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/chapter6/main.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn plus_one(x: Option) -> Option { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/chapter4/main.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/chapter4/main.rs:87:13 [INFO] [stdout] | [INFO] [stdout] 87 | let r1 = &s; // 問題なし [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/chapter4/main.rs:88:13 [INFO] [stdout] | [INFO] [stdout] 88 | let r2 = &s; // 問題なし [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r3` [INFO] [stdout] --> src/chapter4/main.rs:91:13 [INFO] [stdout] | [INFO] [stdout] 91 | let r3 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `reference_to_nothing` [INFO] [stdout] --> src/chapter4/main.rs:100:13 [INFO] [stdout] | [INFO] [stdout] 100 | let reference_to_nothing = no_dangle(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/chapter8/main.rs:12:13 [INFO] [stdout] | [INFO] [stdout] 12 | let v = vec![1, 2, 3]; [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: found module declaration for lib.rs [INFO] [stdout] --> src/chapter15/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | mod lib; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: lib.rs is the root of this crate's library target [INFO] [stdout] = help: to refer to it from other targets, use the library's name as the path [INFO] [stdout] = note: `#[warn(special_module_name)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_4_1` is never used [INFO] [stdout] --> src/chapter4/main.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn practice_4_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_4_1` is never used [INFO] [stdout] --> src/chapter4/main.rs:44:4 [INFO] [stdout] | [INFO] [stdout] 44 | fn calculate_length_4_1(s: String) -> (String, usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_4_2` is never used [INFO] [stdout] --> src/chapter4/main.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn practice_4_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_4_2` is never used [INFO] [stdout] --> src/chapter4/main.rs:109:4 [INFO] [stdout] | [INFO] [stdout] 109 | fn calculate_length_4_2(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/chapter4/main.rs:113:4 [INFO] [stdout] | [INFO] [stdout] 113 | fn change(some_string: &mut String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `no_dangle` is never used [INFO] [stdout] --> src/chapter4/main.rs:125:4 [INFO] [stdout] | [INFO] [stdout] 125 | fn no_dangle() -> String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `row` [INFO] [stdout] --> src/chapter8/main.rs:81:13 [INFO] [stdout] | [INFO] [stdout] 81 | let row = vec![ [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/chapter8/main.rs:93:13 [INFO] [stdout] | [INFO] [stdout] 93 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/chapter8/main.rs:94:13 [INFO] [stdout] | [INFO] [stdout] 94 | let s = String::from("initial contents"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/chapter8/main.rs:145:13 [INFO] [stdout] | [INFO] [stdout] 145 | let mut scores: HashMap<_, _> = [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: function `practice_8_1` is never used [INFO] [stdout] --> src/chapter8/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn practice_8_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_8_2` is never used [INFO] [stdout] --> src/chapter8/main.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn practice_8_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_16_1` is never used [INFO] [stdout] --> src/chapter16/main.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn practice_16_1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_16_2` is never used [INFO] [stdout] --> src/chapter16/main.rs:66:4 [INFO] [stdout] | [INFO] [stdout] 66 | fn practice_16_2() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_1` is never used [INFO] [stdout] --> src/chapter15/main.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn practice_15_1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `List` is never used [INFO] [stdout] --> src/chapter15/main.rs:37:6 [INFO] [stdout] | [INFO] [stdout] 37 | enum List { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_2` is never used [INFO] [stdout] --> src/chapter15/main.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn practice_15_2() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MyBox` is never constructed [INFO] [stdout] --> src/chapter15/main.rs:81:8 [INFO] [stdout] | [INFO] [stdout] 81 | struct MyBox(T); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/chapter15/main.rs:84:8 [INFO] [stdout] | [INFO] [stdout] 83 | impl MyBox { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 84 | fn new(x: T) -> MyBox { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hello` is never used [INFO] [stdout] --> src/chapter15/main.rs:97:4 [INFO] [stdout] | [INFO] [stdout] 97 | fn hello(name: &str) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_3` is never used [INFO] [stdout] --> src/chapter15/main.rs:101:4 [INFO] [stdout] | [INFO] [stdout] 101 | fn practice_15_3() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed [INFO] [stdout] --> src/chapter15/main.rs:121:8 [INFO] [stdout] | [INFO] [stdout] 121 | struct CustomSmartPointer { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_4` is never used [INFO] [stdout] --> src/chapter15/main.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn practice_15_4() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_5` is never used [INFO] [stdout] --> src/chapter15/main.rs:159:4 [INFO] [stdout] | [INFO] [stdout] 159 | fn practice_15_5() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> src/chapter15/main.rs:232:5 [INFO] [stdout] | [INFO] [stdout] 231 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 232 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 233 | parent: RefCell>, [INFO] [stdout] 234 | children: RefCell>>, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: trait `Messenger` is never used [INFO] [stdout] --> src/chapter15/lib.rs:1:11 [INFO] [stdout] | [INFO] [stdout] 1 | pub trait Messenger { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `LimitTracker` is never constructed [INFO] [stdout] --> src/chapter15/lib.rs:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | pub struct LimitTracker<'a, T: 'a + Messenger> { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated items `new` and `set_value` are never used [INFO] [stdout] --> src/chapter15/lib.rs:13:12 [INFO] [stdout] | [INFO] [stdout] 11 | / impl<'a, T> LimitTracker<'a, T> [INFO] [stdout] 12 | | where T: Messenger { [INFO] [stdout] | |__________________- associated items in this implementation [INFO] [stdout] 13 | pub fn new(messenger: &T, max: usize) -> LimitTracker { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 21 | pub fn set_value(&mut self, value: usize) { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/chapter15/lib.rs:13:27 [INFO] [stdout] | [INFO] [stdout] 13 | pub fn new(messenger: &T, max: usize) -> LimitTracker { [INFO] [stdout] | ^^ --------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 13 | pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.08s [INFO] running `Command { std: "docker" "inspect" "cfaa8dafe37f9690833e3cef16010a473f6dd07bcbc7dc7f686fa39da9a823c6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cfaa8dafe37f9690833e3cef16010a473f6dd07bcbc7dc7f686fa39da9a823c6", kill_on_drop: false }` [INFO] [stdout] cfaa8dafe37f9690833e3cef16010a473f6dd07bcbc7dc7f686fa39da9a823c6 [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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] 537c162a507f72bd3d76aefdee6cc3d74f52e8052d7eb6a651634e14c928ebcb [INFO] running `Command { std: "docker" "start" "-a" "537c162a507f72bd3d76aefdee6cc3d74f52e8052d7eb6a651634e14c928ebcb", kill_on_drop: false }` [INFO] [stdout] warning: unused import: `std::thread::Thread` [INFO] [stdout] --> src/chapter20/mod.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::thread::Thread; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling rust-programming-language v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::io::Result as IoResult` [INFO] [stdout] --> src/chapter7/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::io::Result as IoResult; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `cmp::Ordering` and `io` [INFO] [stdout] --> src/chapter7/main.rs:9:11 [INFO] [stdout] | [INFO] [stdout] 9 | use std::{cmp::Ordering, io}; [INFO] [stdout] | ^^^^^^^^^^^^^ ^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `format` [INFO] [stdout] --> src/chapter10/main.rs:1:16 [INFO] [stdout] | [INFO] [stdout] 1 | use std::fmt::{format, Debug, Display}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::thread::Thread` [INFO] [stdout] --> src/chapter20/mod.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::thread::Thread; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: found module declaration for lib.rs [INFO] [stdout] --> src/chapter15/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | mod lib; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: lib.rs is the root of this crate's library target [INFO] [stdout] = help: to refer to it from other targets, use the library's name as the path [INFO] [stdout] = note: `#[warn(special_module_name)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `point` [INFO] [stdout] --> src/chapter10/main.rs:12:13 [INFO] [stdout] | [INFO] [stdout] 12 | let point = Point { x: 5, y: 10 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_point` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `point` [INFO] [stdout] --> src/chapter10/main.rs:13:13 [INFO] [stdout] | [INFO] [stdout] 13 | let point = Point { x: 1.0, y: 4.0 }; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_point` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s2` [INFO] [stdout] --> src/chapter4/main.rs:11:13 [INFO] [stdout] | [INFO] [stdout] 11 | let s2 = s1; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/chapter4/main.rs:71:13 [INFO] [stdout] | [INFO] [stdout] 71 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item1` [INFO] [stdout] --> src/chapter10/main.rs:118:35 [INFO] [stdout] | [INFO] [stdout] 118 | pub fn notify_complex(item1: &T, item2: &T) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `item2` [INFO] [stdout] --> src/chapter10/main.rs:118:46 [INFO] [stdout] | [INFO] [stdout] 118 | pub fn notify_complex(item1: &T, item2: &T) { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/chapter10/main.rs:122:24 [INFO] [stdout] | [INFO] [stdout] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/chapter4/main.rs:87:13 [INFO] [stdout] | [INFO] [stdout] 87 | let r1 = &s; // 問題なし [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/chapter4/main.rs:88:13 [INFO] [stdout] | [INFO] [stdout] 88 | let r2 = &s; // 問題なし [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/chapter10/main.rs:122:31 [INFO] [stdout] | [INFO] [stdout] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r3` [INFO] [stdout] --> src/chapter4/main.rs:91:13 [INFO] [stdout] | [INFO] [stdout] 91 | let r3 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `reference_to_nothing` [INFO] [stdout] --> src/chapter4/main.rs:100:13 [INFO] [stdout] | [INFO] [stdout] 100 | let reference_to_nothing = no_dangle(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `result` is assigned to, but never used [INFO] [stdout] --> src/chapter10/main.rs:175:13 [INFO] [stdout] | [INFO] [stdout] 175 | let result; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_result` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `result` is never read [INFO] [stdout] --> src/chapter10/main.rs:178:13 [INFO] [stdout] | [INFO] [stdout] 178 | result = longest(string1.as_str(), string2.as_str()); [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Error` [INFO] [stdout] --> src/chapter9/main.rs:2:15 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::{Error, Read}; [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/chapter8/main.rs:12:13 [INFO] [stdout] | [INFO] [stdout] 12 | let v = vec![1, 2, 3]; [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: `row` [INFO] [stdout] --> src/chapter8/main.rs:81:13 [INFO] [stdout] | [INFO] [stdout] 81 | let row = vec![ [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_10_1` is never used [INFO] [stdout] --> src/chapter10/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn practice_10_1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/chapter10/main.rs:26:8 [INFO] [stdout] | [INFO] [stdout] 26 | struct Point { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> src/chapter10/main.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 31 | impl Point { [INFO] [stdout] | ----------------- method in this implementation [INFO] [stdout] 32 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_10_2` is never used [INFO] [stdout] --> src/chapter10/main.rs:37:4 [INFO] [stdout] | [INFO] [stdout] 37 | fn practice_10_2() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `some_function` is never used [INFO] [stdout] --> src/chapter10/main.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Pair` is never constructed [INFO] [stdout] --> src/chapter10/main.rs:127:8 [INFO] [stdout] | [INFO] [stdout] 127 | struct Pair { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/chapter10/main.rs:133:8 [INFO] [stdout] | [INFO] [stdout] 132 | impl Pair { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 133 | fn new(x: T, y: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `cmp_display` is never used [INFO] [stdout] --> src/chapter10/main.rs:140:8 [INFO] [stdout] | [INFO] [stdout] 139 | impl Pair { [INFO] [stdout] | -------------------------------------- method in this implementation [INFO] [stdout] 140 | fn cmp_display(&self) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_4_1` is never used [INFO] [stdout] --> src/chapter4/main.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn practice_4_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_4_1` is never used [INFO] [stdout] --> src/chapter4/main.rs:44:4 [INFO] [stdout] | [INFO] [stdout] 44 | fn calculate_length_4_1(s: String) -> (String, usize) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_4_2` is never used [INFO] [stdout] --> src/chapter4/main.rs:51:4 [INFO] [stdout] | [INFO] [stdout] 51 | fn practice_4_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_4_2` is never used [INFO] [stdout] --> src/chapter4/main.rs:109:4 [INFO] [stdout] | [INFO] [stdout] 109 | fn calculate_length_4_2(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/chapter4/main.rs:113:4 [INFO] [stdout] | [INFO] [stdout] 113 | fn change(some_string: &mut String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `no_dangle` is never used [INFO] [stdout] --> src/chapter4/main.rs:125:4 [INFO] [stdout] | [INFO] [stdout] 125 | fn no_dangle() -> String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::rc::Rc` [INFO] [stdout] --> src/chapter16/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::rc::Rc; [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/chapter8/main.rs:93:13 [INFO] [stdout] | [INFO] [stdout] 93 | let s = data.to_string(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> src/chapter8/main.rs:94:13 [INFO] [stdout] | [INFO] [stdout] 94 | let s = String::from("initial contents"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user3` [INFO] [stdout] --> src/chapter5/main.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let user3 = User { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `home` [INFO] [stdout] --> src/chapter6/main.rs:10:13 [INFO] [stdout] | [INFO] [stdout] 10 | let home = IpAddr::V4(127, 0, 0, 1); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_home` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `loopback` [INFO] [stdout] --> src/chapter6/main.rs:11:13 [INFO] [stdout] | [INFO] [stdout] 11 | let loopback = IpAddr::V6(String::from("::1")); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/chapter6/main.rs:21:13 [INFO] [stdout] | [INFO] [stdout] 21 | let x: i8 = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/chapter6/main.rs:22:13 [INFO] [stdout] | [INFO] [stdout] 22 | let y: Option = Some(5); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `spaces` [INFO] [stdout] --> src/chapter3/main.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 43 | let spaces = spaces.len(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces` [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/chapter8/main.rs:145:13 [INFO] [stdout] | [INFO] [stdout] 145 | let mut scores: HashMap<_, _> = [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: function `practice_8_1` is never used [INFO] [stdout] --> src/chapter8/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn practice_8_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_8_2` is never used [INFO] [stdout] --> src/chapter8/main.rs:89:4 [INFO] [stdout] | [INFO] [stdout] 89 | fn practice_8_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_5_1` is never used [INFO] [stdout] --> src/chapter5/main.rs:6:4 [INFO] [stdout] | [INFO] [stdout] 6 | fn practice_5_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/chapter5/main.rs:21:4 [INFO] [stdout] | [INFO] [stdout] 21 | fn build_user(email: String, username: String) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/chapter5/main.rs:32:8 [INFO] [stdout] | [INFO] [stdout] 32 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `x` [INFO] [stdout] --> src/chapter3/main.rs:78:14 [INFO] [stdout] | [INFO] [stdout] 78 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `z` [INFO] [stdout] --> src/chapter3/main.rs:78:20 [INFO] [stdout] | [INFO] [stdout] 78 | let (x, y, z) = tup; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_9_1` is never used [INFO] [stdout] --> src/chapter9/main.rs:9:4 [INFO] [stdout] | [INFO] [stdout] 9 | fn practice_9_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_6_1` is never used [INFO] [stdout] --> src/chapter6/main.rs:7:4 [INFO] [stdout] | [INFO] [stdout] 7 | fn practice_6_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddr` is never used [INFO] [stdout] --> src/chapter6/main.rs:29:6 [INFO] [stdout] | [INFO] [stdout] 29 | enum IpAddr { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Message` is never used [INFO] [stdout] --> src/chapter6/main.rs:35:6 [INFO] [stdout] | [INFO] [stdout] 35 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `call` is never used [INFO] [stdout] --> src/chapter6/main.rs:43:8 [INFO] [stdout] | [INFO] [stdout] 42 | impl Message { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 43 | fn call(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_6_2` is never used [INFO] [stdout] --> src/chapter6/main.rs:61:4 [INFO] [stdout] | [INFO] [stdout] 61 | fn practice_6_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Penny`, `Dime`, and `Quarter` are never constructed [INFO] [stdout] --> src/chapter6/main.rs:97:5 [INFO] [stdout] | [INFO] [stdout] 96 | enum Coin { [INFO] [stdout] | ---- variants in this enum [INFO] [stdout] 97 | Penny, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 98 | Nickel, [INFO] [stdout] 99 | Dime, [INFO] [stdout] | ^^^^ [INFO] [stdout] 100 | Quarter(UsState), [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `value_in_cents` is never used [INFO] [stdout] --> src/chapter6/main.rs:103:4 [INFO] [stdout] | [INFO] [stdout] 103 | fn value_in_cents(coin: Coin) -> u32 { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Alabama` and `Alaska` are never constructed [INFO] [stdout] --> src/chapter6/main.rs:117:5 [INFO] [stdout] | [INFO] [stdout] 116 | enum UsState { [INFO] [stdout] | ------- variants in this enum [INFO] [stdout] 117 | Alabama, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 118 | Alaska, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/chapter6/main.rs:122:4 [INFO] [stdout] | [INFO] [stdout] 122 | fn plus_one(x: Option) -> Option { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/chapter3/main.rs:123:13 [INFO] [stdout] | [INFO] [stdout] 123 | let y = 6; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant `MAX_POINTS` is never used [INFO] [stdout] --> src/chapter3/main.rs:4:7 [INFO] [stdout] | [INFO] [stdout] 4 | const MAX_POINTS: u32 = 100_000; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_3_1` is never used [INFO] [stdout] --> src/chapter3/main.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn practice_3_1() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_3_2` is never used [INFO] [stdout] --> src/chapter3/main.rs:47:4 [INFO] [stdout] | [INFO] [stdout] 47 | fn practice_3_2() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_3_3` is never used [INFO] [stdout] --> src/chapter3/main.rs:113:4 [INFO] [stdout] | [INFO] [stdout] 113 | fn practice_3_3() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `print_labeled_measurement` is never used [INFO] [stdout] --> src/chapter3/main.rs:141:4 [INFO] [stdout] | [INFO] [stdout] 141 | fn print_labeled_measurement(value: i32, unit_label: char) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/chapter3/main.rs:145:4 [INFO] [stdout] | [INFO] [stdout] 145 | fn plus_one(x: i32) -> i32 { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_16_1` is never used [INFO] [stdout] --> src/chapter16/main.rs:12:4 [INFO] [stdout] | [INFO] [stdout] 12 | fn practice_16_1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_1` is never used [INFO] [stdout] --> src/chapter15/main.rs:17:4 [INFO] [stdout] | [INFO] [stdout] 17 | fn practice_15_1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_16_2` is never used [INFO] [stdout] --> src/chapter16/main.rs:66:4 [INFO] [stdout] | [INFO] [stdout] 66 | fn practice_16_2() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `List` is never used [INFO] [stdout] --> src/chapter15/main.rs:37:6 [INFO] [stdout] | [INFO] [stdout] 37 | enum List { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_2` is never used [INFO] [stdout] --> src/chapter15/main.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn practice_15_2() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `MyBox` is never constructed [INFO] [stdout] --> src/chapter15/main.rs:81:8 [INFO] [stdout] | [INFO] [stdout] 81 | struct MyBox(T); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/chapter15/main.rs:84:8 [INFO] [stdout] | [INFO] [stdout] 83 | impl MyBox { [INFO] [stdout] | ---------------- associated function in this implementation [INFO] [stdout] 84 | fn new(x: T) -> MyBox { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hello` is never used [INFO] [stdout] --> src/chapter15/main.rs:97:4 [INFO] [stdout] | [INFO] [stdout] 97 | fn hello(name: &str) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_3` is never used [INFO] [stdout] --> src/chapter15/main.rs:101:4 [INFO] [stdout] | [INFO] [stdout] 101 | fn practice_15_3() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `CustomSmartPointer` is never constructed [INFO] [stdout] --> src/chapter15/main.rs:121:8 [INFO] [stdout] | [INFO] [stdout] 121 | struct CustomSmartPointer { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_4` is never used [INFO] [stdout] --> src/chapter15/main.rs:132:4 [INFO] [stdout] | [INFO] [stdout] 132 | fn practice_15_4() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `practice_15_5` is never used [INFO] [stdout] --> src/chapter15/main.rs:159:4 [INFO] [stdout] | [INFO] [stdout] 159 | fn practice_15_5() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> src/chapter15/main.rs:232:5 [INFO] [stdout] | [INFO] [stdout] 231 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 232 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 233 | parent: RefCell>, [INFO] [stdout] 234 | children: RefCell>>, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stdout] --> src/chapter15/lib.rs:13:27 [INFO] [stdout] | [INFO] [stdout] 13 | pub fn new(messenger: &T, max: usize) -> LimitTracker { [INFO] [stdout] | ^^ --------------- the lifetime gets resolved as `'_` [INFO] [stdout] | | [INFO] [stdout] | this lifetime flows to the output [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stdout] | [INFO] [stdout] 13 | pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 2.00s [INFO] running `Command { std: "docker" "inspect" "537c162a507f72bd3d76aefdee6cc3d74f52e8052d7eb6a651634e14c928ebcb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "537c162a507f72bd3d76aefdee6cc3d74f52e8052d7eb6a651634e14c928ebcb", kill_on_drop: false }` [INFO] [stdout] 537c162a507f72bd3d76aefdee6cc3d74f52e8052d7eb6a651634e14c928ebcb [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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] f153e6eac18884bf1962f47b3bbca1a3b1c66c16daa5ca7f174b6652140b2340 [INFO] running `Command { std: "docker" "start" "-a" "f153e6eac18884bf1962f47b3bbca1a3b1c66c16daa5ca7f174b6652140b2340", kill_on_drop: false }` [INFO] [stderr] warning: unused import: `std::thread::Thread` [INFO] [stderr] --> src/chapter20/mod.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | use std::thread::Thread; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `rust-programming-language` (lib) generated 1 warning (run `cargo fix --lib -p rust-programming-language` to apply 1 suggestion) [INFO] [stderr] warning: found module declaration for lib.rs [INFO] [stderr] --> src/chapter15/main.rs:1:1 [INFO] [stderr] | [INFO] [stderr] 1 | mod lib; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: lib.rs is the root of this crate's library target [INFO] [stderr] = help: to refer to it from other targets, use the library's name as the path [INFO] [stderr] = note: `#[warn(special_module_name)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_15_1` is never used [INFO] [stderr] --> src/chapter15/main.rs:17:4 [INFO] [stderr] | [INFO] [stderr] 17 | fn practice_15_1() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: enum `List` is never used [INFO] [stderr] --> src/chapter15/main.rs:37:6 [INFO] [stderr] | [INFO] [stderr] 37 | enum List { [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] [INFO] [stderr] warning: function `practice_15_2` is never used [INFO] [stderr] --> src/chapter15/main.rs:42:4 [INFO] [stderr] | [INFO] [stderr] 42 | fn practice_15_2() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `MyBox` is never constructed [INFO] [stderr] --> src/chapter15/main.rs:81:8 [INFO] [stderr] | [INFO] [stderr] 81 | struct MyBox(T); [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function `new` is never used [INFO] [stderr] --> src/chapter15/main.rs:84:8 [INFO] [stderr] | [INFO] [stderr] 83 | impl MyBox { [INFO] [stderr] | ---------------- associated function in this implementation [INFO] [stderr] 84 | fn new(x: T) -> MyBox { [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: function `hello` is never used [INFO] [stderr] --> src/chapter15/main.rs:97:4 [INFO] [stderr] | [INFO] [stderr] 97 | fn hello(name: &str) { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_15_3` is never used [INFO] [stderr] --> src/chapter15/main.rs:101:4 [INFO] [stderr] | [INFO] [stderr] 101 | fn practice_15_3() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `CustomSmartPointer` is never constructed [INFO] [stderr] --> src/chapter15/main.rs:121:8 [INFO] [stderr] | [INFO] [stderr] 121 | struct CustomSmartPointer { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_15_4` is never used [INFO] [stderr] --> src/chapter15/main.rs:132:4 [INFO] [stderr] | [INFO] [stderr] 132 | fn practice_15_4() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_15_5` is never used [INFO] [stderr] --> src/chapter15/main.rs:159:4 [INFO] [stderr] | [INFO] [stderr] 159 | fn practice_15_5() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: fields `value` and `children` are never read [INFO] [stderr] --> src/chapter15/main.rs:232:5 [INFO] [stderr] | [INFO] [stderr] 231 | struct Node { [INFO] [stderr] | ---- fields in this struct [INFO] [stderr] 232 | value: i32, [INFO] [stderr] | ^^^^^ [INFO] [stderr] 233 | parent: RefCell>, [INFO] [stderr] 234 | children: RefCell>>, [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] [INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing [INFO] [stderr] --> src/chapter15/lib.rs:13:27 [INFO] [stderr] | [INFO] [stderr] 13 | pub fn new(messenger: &T, max: usize) -> LimitTracker { [INFO] [stderr] | ^^ --------------- the lifetime gets resolved as `'_` [INFO] [stderr] | | [INFO] [stderr] | this lifetime flows to the output [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths [INFO] [stderr] | [INFO] [stderr] 13 | pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> { [INFO] [stderr] | +++ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `spaces` [INFO] [stderr] --> src/chapter3/main.rs:43:13 [INFO] [stderr] | [INFO] [stderr] 43 | let spaces = spaces.len(); [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/chapter3/main.rs:78:14 [INFO] [stderr] | [INFO] [stderr] 78 | let (x, y, z) = tup; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `z` [INFO] [stderr] --> src/chapter3/main.rs:78:20 [INFO] [stderr] | [INFO] [stderr] 78 | let (x, y, z) = tup; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_z` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/chapter3/main.rs:123:13 [INFO] [stderr] | [INFO] [stderr] 123 | let y = 6; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: constant `MAX_POINTS` is never used [INFO] [stderr] --> src/chapter3/main.rs:4:7 [INFO] [stderr] | [INFO] [stderr] 4 | const MAX_POINTS: u32 = 100_000; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_3_1` is never used [INFO] [stderr] --> src/chapter3/main.rs:14:4 [INFO] [stderr] | [INFO] [stderr] 14 | fn practice_3_1() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_3_2` is never used [INFO] [stderr] --> src/chapter3/main.rs:47:4 [INFO] [stderr] | [INFO] [stderr] 47 | fn practice_3_2() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_3_3` is never used [INFO] [stderr] --> src/chapter3/main.rs:113:4 [INFO] [stderr] | [INFO] [stderr] 113 | fn practice_3_3() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `print_labeled_measurement` is never used [INFO] [stderr] --> src/chapter3/main.rs:141:4 [INFO] [stderr] | [INFO] [stderr] 141 | fn print_labeled_measurement(value: i32, unit_label: char) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `plus_one` is never used [INFO] [stderr] --> src/chapter3/main.rs:145:4 [INFO] [stderr] | [INFO] [stderr] 145 | fn plus_one(x: i32) -> i32 { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `rust-programming-language` (bin "chap15" test) generated 13 warnings (run `cargo fix --bin "chap15" --tests` to apply 1 suggestion) [INFO] [stderr] warning: `rust-programming-language` (bin "chap3" test) generated 10 warnings [INFO] [stderr] warning: unused import: `std::io::Result as IoResult` [INFO] [stderr] --> src/chapter7/main.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | use std::io::Result as IoResult; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused imports: `cmp::Ordering` and `io` [INFO] [stderr] --> src/chapter7/main.rs:9:11 [INFO] [stderr] | [INFO] [stderr] 9 | use std::{cmp::Ordering, io}; [INFO] [stderr] | ^^^^^^^^^^^^^ ^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/chapter8/main.rs:12:13 [INFO] [stderr] | [INFO] [stderr] 12 | let v = vec![1, 2, 3]; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `row` [INFO] [stderr] --> src/chapter8/main.rs:81:13 [INFO] [stderr] | [INFO] [stderr] 81 | let row = vec![ [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_row` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/chapter8/main.rs:93:13 [INFO] [stderr] | [INFO] [stderr] 93 | let s = data.to_string(); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s` [INFO] [stderr] --> src/chapter8/main.rs:94:13 [INFO] [stderr] | [INFO] [stderr] 94 | let s = String::from("initial contents"); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/chapter8/main.rs:145:13 [INFO] [stderr] | [INFO] [stderr] 145 | let mut scores: HashMap<_, _> = [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_8_1` is never used [INFO] [stderr] --> src/chapter8/main.rs:9:4 [INFO] [stderr] | [INFO] [stderr] 9 | fn practice_8_1() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_8_2` is never used [INFO] [stderr] --> src/chapter8/main.rs:89:4 [INFO] [stderr] | [INFO] [stderr] 89 | fn practice_8_2() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Error` [INFO] [stderr] --> src/chapter9/main.rs:2:15 [INFO] [stderr] | [INFO] [stderr] 2 | use std::io::{Error, Read}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_9_1` is never used [INFO] [stderr] --> src/chapter9/main.rs:9:4 [INFO] [stderr] | [INFO] [stderr] 9 | fn practice_9_1() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s2` [INFO] [stderr] --> src/chapter4/main.rs:11:13 [INFO] [stderr] | [INFO] [stderr] 11 | let s2 = s1; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s2` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/chapter4/main.rs:71:13 [INFO] [stderr] | [INFO] [stderr] 71 | let r1 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/chapter4/main.rs:87:13 [INFO] [stderr] | [INFO] [stderr] 87 | let r1 = &s; // 問題なし [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r2` [INFO] [stderr] --> src/chapter4/main.rs:88:13 [INFO] [stderr] | [INFO] [stderr] 88 | let r2 = &s; // 問題なし [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r3` [INFO] [stderr] --> src/chapter4/main.rs:91:13 [INFO] [stderr] | [INFO] [stderr] 91 | let r3 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `reference_to_nothing` [INFO] [stderr] --> src/chapter4/main.rs:100:13 [INFO] [stderr] | [INFO] [stderr] 100 | let reference_to_nothing = no_dangle(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing` [INFO] [stderr] [INFO] [stderr] warning: function `practice_4_1` is never used [INFO] [stderr] --> src/chapter4/main.rs:7:4 [INFO] [stderr] | [INFO] [stderr] 7 | fn practice_4_1() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `calculate_length_4_1` is never used [INFO] [stderr] --> src/chapter4/main.rs:44:4 [INFO] [stderr] | [INFO] [stderr] 44 | fn calculate_length_4_1(s: String) -> (String, usize) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_4_2` is never used [INFO] [stderr] --> src/chapter4/main.rs:51:4 [INFO] [stderr] | [INFO] [stderr] 51 | fn practice_4_2() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `calculate_length_4_2` is never used [INFO] [stderr] --> src/chapter4/main.rs:109:4 [INFO] [stderr] | [INFO] [stderr] 109 | fn calculate_length_4_2(s: &String) -> usize { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `change` is never used [INFO] [stderr] --> src/chapter4/main.rs:113:4 [INFO] [stderr] | [INFO] [stderr] 113 | fn change(some_string: &mut String) { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `no_dangle` is never used [INFO] [stderr] --> src/chapter4/main.rs:125:4 [INFO] [stderr] | [INFO] [stderr] 125 | fn no_dangle() -> String { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `user3` [INFO] [stderr] --> src/chapter5/main.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | let user3 = User { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_5_1` is never used [INFO] [stderr] --> src/chapter5/main.rs:6:4 [INFO] [stderr] | [INFO] [stderr] 6 | fn practice_5_1() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `build_user` is never used [INFO] [stderr] --> src/chapter5/main.rs:21:4 [INFO] [stderr] | [INFO] [stderr] 21 | fn build_user(email: String, username: String) -> User { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `User` is never constructed [INFO] [stderr] --> src/chapter5/main.rs:32:8 [INFO] [stderr] | [INFO] [stderr] 32 | struct User { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `format` [INFO] [stderr] --> src/chapter10/main.rs:1:16 [INFO] [stderr] | [INFO] [stderr] 1 | use std::fmt::{format, Debug, Display}; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `point` [INFO] [stderr] --> src/chapter10/main.rs:12:13 [INFO] [stderr] | [INFO] [stderr] 12 | let point = Point { x: 5, y: 10 }; [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_point` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `point` [INFO] [stderr] --> src/chapter10/main.rs:13:13 [INFO] [stderr] | [INFO] [stderr] 13 | let point = Point { x: 1.0, y: 4.0 }; [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_point` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `item1` [INFO] [stderr] --> src/chapter10/main.rs:118:35 [INFO] [stderr] | [INFO] [stderr] 118 | pub fn notify_complex(item1: &T, item2: &T) { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_item1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `item2` [INFO] [stderr] --> src/chapter10/main.rs:118:46 [INFO] [stderr] | [INFO] [stderr] 118 | pub fn notify_complex(item1: &T, item2: &T) { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_item2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `t` [INFO] [stderr] --> src/chapter10/main.rs:122:24 [INFO] [stderr] | [INFO] [stderr] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `u` [INFO] [stderr] --> src/chapter10/main.rs:122:31 [INFO] [stderr] | [INFO] [stderr] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stderr] [INFO] [stderr] warning: variable `result` is assigned to, but never used [INFO] [stderr] --> src/chapter10/main.rs:175:13 [INFO] [stderr] | [INFO] [stderr] 175 | let result; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_result` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result` is never read [INFO] [stderr] --> src/chapter10/main.rs:178:13 [INFO] [stderr] | [INFO] [stderr] 178 | result = longest(string1.as_str(), string2.as_str()); [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_10_1` is never used [INFO] [stderr] --> src/chapter10/main.rs:9:4 [INFO] [stderr] | [INFO] [stderr] 9 | fn practice_10_1() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: struct `Point` is never constructed [INFO] [stderr] --> src/chapter10/main.rs:26:8 [INFO] [stderr] | [INFO] [stderr] 26 | struct Point { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method `x` is never used [INFO] [stderr] --> src/chapter10/main.rs:32:8 [INFO] [stderr] | [INFO] [stderr] 31 | impl Point { [INFO] [stderr] | ----------------- method in this implementation [INFO] [stderr] 32 | fn x(&self) -> &T { [INFO] [stderr] | ^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_10_2` is never used [INFO] [stderr] --> src/chapter10/main.rs:37:4 [INFO] [stderr] | [INFO] [stderr] 37 | fn practice_10_2() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `some_function` is never used [INFO] [stderr] --> src/chapter10/main.rs:122:4 [INFO] [stderr] | [INFO] [stderr] 122 | fn some_function(t: &T, u: &U) -> i32 where T: Display + Clone, U: Clone + Debug [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Pair` is never constructed [INFO] [stderr] --> src/chapter10/main.rs:127:8 [INFO] [stderr] | [INFO] [stderr] 127 | struct Pair { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function `new` is never used [INFO] [stderr] --> src/chapter10/main.rs:133:8 [INFO] [stderr] | [INFO] [stderr] 132 | impl Pair { [INFO] [stderr] | ---------------- associated function in this implementation [INFO] [stderr] 133 | fn new(x: T, y: T) -> Self { [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: method `cmp_display` is never used [INFO] [stderr] --> src/chapter10/main.rs:140:8 [INFO] [stderr] | [INFO] [stderr] 139 | impl Pair { [INFO] [stderr] | -------------------------------------- method in this implementation [INFO] [stderr] 140 | fn cmp_display(&self) { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::rc::Rc` [INFO] [stderr] --> src/chapter16/main.rs:1:5 [INFO] [stderr] | [INFO] [stderr] 1 | use std::rc::Rc; [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_16_1` is never used [INFO] [stderr] --> src/chapter16/main.rs:12:4 [INFO] [stderr] | [INFO] [stderr] 12 | fn practice_16_1() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function `practice_16_2` is never used [INFO] [stderr] --> src/chapter16/main.rs:66:4 [INFO] [stderr] | [INFO] [stderr] 66 | fn practice_16_2() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `home` [INFO] [stderr] --> src/chapter6/main.rs:10:13 [INFO] [stderr] | [INFO] [stderr] 10 | let home = IpAddr::V4(127, 0, 0, 1); [INFO] [stdout] [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_home` [INFO] [stdout] running 0 tests [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `loopback` [INFO] [stderr] --> src/chapter6/main.rs:11:13 [INFO] [stderr] | [INFO] [stderr] 11 | let loopback = IpAddr::V6(String::from("::1")); [INFO] [stderr] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/chapter6/main.rs:21:13 [INFO] [stderr] | [INFO] [stderr] 21 | let x: i8 = 5; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/chapter6/main.rs:22:13 [INFO] [stderr] | [INFO] [stderr] 22 | let y: Option = Some(5); [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: function `practice_6_1` is never used [INFO] [stderr] --> src/chapter6/main.rs:7:4 [INFO] [stderr] | [INFO] [stderr] 7 | fn practice_6_1() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: enum `IpAddr` is never used [INFO] [stderr] --> src/chapter6/main.rs:29:6 [INFO] [stderr] | [INFO] [stderr] 29 | enum IpAddr { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `Message` is never used [INFO] [stderr] --> src/chapter6/main.rs:35:6 [INFO] [stderr] | [INFO] [stderr] 35 | enum Message { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method `call` is never used [INFO] [stderr] --> src/chapter6/main.rs:43:8 [INFO] [stderr] | [INFO] [stderr] 42 | impl Message { [INFO] [stderr] | ------------ method in this implementation [INFO] [stderr] 43 | fn call(&self) { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `practice_6_2` is never used [INFO] [stderr] --> src/chapter6/main.rs:61:4 [INFO] [stderr] | [INFO] [stderr] 61 | fn practice_6_2() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variants `Penny`, `Dime`, and `Quarter` are never constructed [INFO] [stderr] --> src/chapter6/main.rs:97:5 [INFO] [stderr] | [INFO] [stderr] 96 | enum Coin { [INFO] [stderr] | ---- variants in this enum [INFO] [stderr] 97 | Penny, [INFO] [stderr] | ^^^^^ [INFO] [stderr] 98 | Nickel, [INFO] [stderr] 99 | Dime, [INFO] [stderr] | ^^^^ [INFO] [stderr] 100 | Quarter(UsState), [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `value_in_cents` is never used [INFO] [stderr] --> src/chapter6/main.rs:103:4 [INFO] [stderr] | [INFO] [stderr] 103 | fn value_in_cents(coin: Coin) -> u32 { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variants `Alabama` and `Alaska` are never constructed [INFO] [stderr] --> src/chapter6/main.rs:117:5 [INFO] [stderr] | [INFO] [stderr] 116 | enum UsState { [INFO] [stderr] | ------- variants in this enum [INFO] [stderr] 117 | Alabama, [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] 118 | Alaska, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] [INFO] [stderr] warning: function `plus_one` is never used [INFO] [stderr] --> src/chapter6/main.rs:122:4 [INFO] [stderr] | [INFO] [stderr] 122 | fn plus_one(x: Option) -> Option { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `rust-programming-language` (bin "chap7" test) generated 2 warnings (run `cargo fix --bin "chap7" --tests` to apply 2 suggestions) [INFO] [stderr] warning: `rust-programming-language` (bin "chap8" test) generated 7 warnings (run `cargo fix --bin "chap8" --tests` to apply 1 suggestion) [INFO] [stderr] warning: `rust-programming-language` (bin "chap9" test) generated 2 warnings (run `cargo fix --bin "chap9" --tests` to apply 1 suggestion) [INFO] [stderr] warning: `rust-programming-language` (bin "chap4" test) generated 12 warnings [INFO] [stderr] warning: `rust-programming-language` (bin "chap5" test) generated 4 warnings [INFO] [stderr] warning: `rust-programming-language` (bin "chap10" test) generated 17 warnings (run `cargo fix --bin "chap10" --tests` to apply 1 suggestion) [INFO] [stderr] warning: `rust-programming-language` (bin "chap16" test) generated 3 warnings (run `cargo fix --bin "chap16" --tests` to apply 1 suggestion) [INFO] [stderr] warning: `rust-programming-language` (bin "chap6" test) generated 13 warnings [INFO] [stderr] warning: `rust-programming-language` (lib test) generated 1 warning (1 duplicate) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/rust_programming_language-548141d336992fdd) [INFO] [stderr] Running unittests src/chapter1/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap1-c28e508ab1ac67be) [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter10/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap10-09a4507296214f51) [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter15/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap15-e30d84f7c3da13e1) [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 1 test [INFO] [stderr] Running unittests src/chapter16/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap16-e4307b1a6e4d87f9) [INFO] [stdout] test lib::tests::it_sends_an_over_75_percent_warning_message ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stderr] Running unittests src/chapter20/bin/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap20-af8909b85e928a81) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter3/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap3-ecb5eddde9cbcbca) [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter4/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap4-ee89a2dfaf7fc27c) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter5/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap5-bde3c776fa4c5205) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter6/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap6-60e8ce3a99c39514) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter7/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap7-4a6bea6465797694) [INFO] [stderr] Running unittests src/chapter8/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap8-8f497917ca01eb09) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests src/chapter9/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/chap9-a693f1918f6606ad) [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/rust_programming_language-8a8575ca04bcf7f3) [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "f153e6eac18884bf1962f47b3bbca1a3b1c66c16daa5ca7f174b6652140b2340", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f153e6eac18884bf1962f47b3bbca1a3b1c66c16daa5ca7f174b6652140b2340", kill_on_drop: false }` [INFO] [stdout] f153e6eac18884bf1962f47b3bbca1a3b1c66c16daa5ca7f174b6652140b2340