[INFO] fetching crate rust_beginner 0.1.0... [INFO] testing rust_beginner-0.1.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-8 [INFO] extracting crate rust_beginner 0.1.0 into /workspace/builds/worker-3-tc2/source [INFO] started tweaking crates.io crate rust_beginner 0.1.0 [INFO] finished tweaking crates.io crate rust_beginner 0.1.0 [INFO] tweaked toml for crates.io crate rust_beginner 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate rust_beginner 0.1.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate rust_beginner 0.1.0 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a47734ea2d5e6fe1bce77448dce0a31da7b26439eaa0dd661ae1b7a72b23bddd [INFO] running `Command { std: "docker" "start" "-a" "a47734ea2d5e6fe1bce77448dce0a31da7b26439eaa0dd661ae1b7a72b23bddd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a47734ea2d5e6fe1bce77448dce0a31da7b26439eaa0dd661ae1b7a72b23bddd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a47734ea2d5e6fe1bce77448dce0a31da7b26439eaa0dd661ae1b7a72b23bddd", kill_on_drop: false }` [INFO] [stdout] a47734ea2d5e6fe1bce77448dce0a31da7b26439eaa0dd661ae1b7a72b23bddd [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 431f9d1888abad4c098784af7563754a56abcd21a3a88385560ec92a1edc5053 [INFO] running `Command { std: "docker" "start" "-a" "431f9d1888abad4c098784af7563754a56abcd21a3a88385560ec92a1edc5053", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.171 [INFO] [stderr] Compiling zerocopy v0.8.23 [INFO] [stderr] Compiling getrandom v0.2.15 [INFO] [stderr] Compiling rand_core v0.6.4 [INFO] [stderr] Compiling ppv-lite86 v0.2.21 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling rust_beginner v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> src/art.rs:31:16 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> src/art.rs:31:34 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/lib.rs:48:28 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/lib.rs:48:35 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Pair` is never constructed [INFO] [stdout] --> src/lib.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | struct Pair { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/lib.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl Pair { [INFO] [stdout] | --------------- associated function in this implementation [INFO] [stdout] 12 | 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/lib.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Pair { [INFO] [stdout] | ------------------------------------- method in this implementation [INFO] [stdout] 18 | fn cmp_display(&self) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `deliver_order` is never used [INFO] [stdout] --> src/lib.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn deliver_order() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `function1` is never used [INFO] [stdout] --> src/lib.rs:172:4 [INFO] [stdout] | [INFO] [stdout] 172 | fn function1() -> Result { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `function2` is never used [INFO] [stdout] --> src/lib.rs:178:4 [INFO] [stdout] | [INFO] [stdout] 178 | fn function2() -> IoResult<()> { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Shoe` is never constructed [INFO] [stdout] --> src/lib.rs:199:8 [INFO] [stdout] | [INFO] [stdout] 199 | struct Shoe { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `shoes_in_size` is never used [INFO] [stdout] --> src/lib.rs:204:4 [INFO] [stdout] | [INFO] [stdout] 204 | fn shoes_in_size(shoes: Vec, shoe_size: u32) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `seat_at_table` is never used [INFO] [stdout] --> src/front_of_house/hosting.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_order` is never used [INFO] [stdout] --> src/front_of_house.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `serve_order` is never used [INFO] [stdout] --> src/front_of_house.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_payment` is never used [INFO] [stdout] --> src/front_of_house.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `seasonal_fruit` is never read [INFO] [stdout] --> src/lib.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 128 | pub struct Breakfast { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 129 | pub toast: String, [INFO] [stdout] 130 | seasonal_fruit: String, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `eat_at_restaurant` is never used [INFO] [stdout] --> src/lib.rs:164:12 [INFO] [stdout] | [INFO] [stdout] 164 | pub fn eat_at_restaurant() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::garden::vegetables::Asparagus` [INFO] [stdout] --> src/main.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | use crate::garden::vegetables::Asparagus; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rust_beginner::art::PrimaryColor` [INFO] [stdout] --> src/main.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 15 | use rust_beginner::art::PrimaryColor; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `core::num` [INFO] [stdout] --> src/main.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | use core::num; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::ErrorKind` [INFO] [stdout] --> src/main.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 24 | use std::io::ErrorKind; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `Point_generic` should have an upper camel case name [INFO] [stdout] --> src/main.rs:833:8 [INFO] [stdout] | [INFO] [stdout] 833 | struct Point_generic { [INFO] [stdout] | ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PointGeneric` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `Point_multi` should have an upper camel case name [INFO] [stdout] --> src/main.rs:853:8 [INFO] [stdout] | [INFO] [stdout] 853 | struct Point_multi { [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `PointMulti` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tup` [INFO] [stdout] --> src/main.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let tup: (i32, f64, u8) = (500, 6.4, 1); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tup` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/main.rs:41:9 [INFO] [stdout] | [INFO] [stdout] 41 | let a:[i32; 5] = [1, 2, 3, 4, 5]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:99:9 [INFO] [stdout] | [INFO] [stdout] 99 | let mut spaces = " "; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `spaces` [INFO] [stdout] --> src/main.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | let spaces = spaces.len(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/main.rs:147:9 [INFO] [stdout] | [INFO] [stdout] 147 | let a = [1, 2, 3, 4, 5]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:230:9 [INFO] [stdout] | [INFO] [stdout] 230 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> src/main.rs:313:11 [INFO] [stdout] | [INFO] [stdout] 313 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> src/main.rs:356:9 [INFO] [stdout] | [INFO] [stdout] 356 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `origin` [INFO] [stdout] --> src/main.rs:357:9 [INFO] [stdout] | [INFO] [stdout] 357 | let origin = Point(0, 0, 0); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user1` [INFO] [stdout] --> src/main.rs:410:9 [INFO] [stdout] | [INFO] [stdout] 410 | let user1 = build_user( [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user3` [INFO] [stdout] --> src/main.rs:424:9 [INFO] [stdout] | [INFO] [stdout] 424 | let user3 = User { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `home` [INFO] [stdout] --> src/main.rs:456:9 [INFO] [stdout] | [INFO] [stdout] 456 | let home = IpAddr::V4(String::from("127.0.0.1")); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_home` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `loopback` [INFO] [stdout] --> src/main.rs:457:9 [INFO] [stdout] | [INFO] [stdout] 457 | 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: variable `count` is assigned to, but never used [INFO] [stdout] --> src/main.rs:621:9 [INFO] [stdout] | [INFO] [stdout] 621 | let mut count = 0; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_count` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `count` is never read [INFO] [stdout] --> src/main.rs:626:13 [INFO] [stdout] | [INFO] [stdout] 626 | count += 1; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/main.rs:754:9 [INFO] [stdout] | [INFO] [stdout] 754 | let v = vec![1, 2, 3]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file_result` [INFO] [stdout] --> src/main.rs:760:9 [INFO] [stdout] | [INFO] [stdout] 760 | let greeting_file_result = File::open("hello.txt"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:964:9 [INFO] [stdout] | [INFO] [stdout] 964 | let i = ImportantExcerpt { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guess_number` is never used [INFO] [stdout] --> src/main.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn guess_number() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `const_and_shadowing` is never used [INFO] [stdout] --> src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn const_and_shadowing() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `data_type` is never used [INFO] [stdout] --> src/main.rs:105:4 [INFO] [stdout] | [INFO] [stdout] 105 | fn data_type() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `control_flow` is never used [INFO] [stdout] --> src/main.rs:164:4 [INFO] [stdout] | [INFO] [stdout] 164 | fn control_flow() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_ownership` is never used [INFO] [stdout] --> src/main.rs:213:4 [INFO] [stdout] | [INFO] [stdout] 213 | fn take_ownership(some_string: String) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `ownership` is never used [INFO] [stdout] --> src/main.rs:217:4 [INFO] [stdout] | [INFO] [stdout] 217 | fn ownership() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/main.rs:313:4 [INFO] [stdout] | [INFO] [stdout] 313 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change_mut` is never used [INFO] [stdout] --> src/main.rs:319:4 [INFO] [stdout] | [INFO] [stdout] 319 | fn change_mut(some_string: &mut String) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length` is never used [INFO] [stdout] --> src/main.rs:323:4 [INFO] [stdout] | [INFO] [stdout] 323 | fn calculate_length(s: String) -> (usize, String) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_ref` is never used [INFO] [stdout] --> src/main.rs:330:4 [INFO] [stdout] | [INFO] [stdout] 330 | fn calculate_length_ref(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `no_dangle` is never used [INFO] [stdout] --> src/main.rs:339:4 [INFO] [stdout] | [INFO] [stdout] 339 | fn no_dangle() -> String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/main.rs:345:8 [INFO] [stdout] | [INFO] [stdout] 345 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/main.rs:352:8 [INFO] [stdout] | [INFO] [stdout] 352 | struct Color(i32, i32, i32); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/main.rs:353:8 [INFO] [stdout] | [INFO] [stdout] 353 | struct Point(i32, i32, i32); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `tuple_struct` is never used [INFO] [stdout] --> src/main.rs:355:4 [INFO] [stdout] | [INFO] [stdout] 355 | fn tuple_struct() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/main.rs:360:4 [INFO] [stdout] | [INFO] [stdout] 360 | fn build_user(email: String, username: String) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `height` is never read [INFO] [stdout] --> src/main.rs:372:5 [INFO] [stdout] | [INFO] [stdout] 370 | struct Rectangle { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 371 | width: u32, [INFO] [stdout] 372 | height: u32, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `area` and `can_hold` are never used [INFO] [stdout] --> src/main.rs:376:8 [INFO] [stdout] | [INFO] [stdout] 375 | impl Rectangle { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 376 | fn area(&self) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 380 | fn can_hold(&self, other: &Rectangle) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `square` is never used [INFO] [stdout] --> src/main.rs:386:8 [INFO] [stdout] | [INFO] [stdout] 385 | impl Rectangle { [INFO] [stdout] | -------------- associated function in this implementation [INFO] [stdout] 386 | fn square(size: u32) -> Self { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `struct_dbg` is never used [INFO] [stdout] --> src/main.rs:394:4 [INFO] [stdout] | [INFO] [stdout] 394 | fn struct_dbg() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `struct_example` is never used [INFO] [stdout] --> src/main.rs:407:4 [INFO] [stdout] | [INFO] [stdout] 407 | fn struct_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddrKind` is never used [INFO] [stdout] --> src/main.rs:432:6 [INFO] [stdout] | [INFO] [stdout] 432 | enum IpAddrKind { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddr` is never used [INFO] [stdout] --> src/main.rs:437:6 [INFO] [stdout] | [INFO] [stdout] 437 | enum IpAddr { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Message` is never used [INFO] [stdout] --> src/main.rs:442:6 [INFO] [stdout] | [INFO] [stdout] 442 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `call` is never used [INFO] [stdout] --> src/main.rs:450:8 [INFO] [stdout] | [INFO] [stdout] 449 | impl Message { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 450 | fn call(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `route` is never used [INFO] [stdout] --> src/main.rs:455:4 [INFO] [stdout] | [INFO] [stdout] 455 | fn route() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `option_handling_examples` is never used [INFO] [stdout] --> src/main.rs:502:4 [INFO] [stdout] | [INFO] [stdout] 502 | fn option_handling_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `UsState` is never used [INFO] [stdout] --> src/main.rs:569:6 [INFO] [stdout] | [INFO] [stdout] 569 | enum UsState { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Coin` is never used [INFO] [stdout] --> src/main.rs:579:6 [INFO] [stdout] | [INFO] [stdout] 579 | enum Coin { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `value_in_cents` is never used [INFO] [stdout] --> src/main.rs:586:4 [INFO] [stdout] | [INFO] [stdout] 586 | fn value_in_cents(coin: Coin) -> u8 { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/main.rs:598:4 [INFO] [stdout] | [INFO] [stdout] 598 | fn plus_one(x: Option) -> Option { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `catch_all` is never used [INFO] [stdout] --> src/main.rs:605:4 [INFO] [stdout] | [INFO] [stdout] 605 | fn catch_all() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `SpreadsheetCell` is never used [INFO] [stdout] --> src/main.rs:633:6 [INFO] [stdout] | [INFO] [stdout] 633 | enum SpreadsheetCell { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `vec_example` is never used [INFO] [stdout] --> src/main.rs:640:4 [INFO] [stdout] | [INFO] [stdout] 640 | fn vec_example() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `str_example` is never used [INFO] [stdout] --> src/main.rs:680:4 [INFO] [stdout] | [INFO] [stdout] 680 | fn str_example() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hash_example` is never used [INFO] [stdout] --> src/main.rs:714:4 [INFO] [stdout] | [INFO] [stdout] 714 | fn hash_example() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `panic_example` is never used [INFO] [stdout] --> src/main.rs:753:4 [INFO] [stdout] | [INFO] [stdout] 753 | fn panic_example() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> src/main.rs:809:4 [INFO] [stdout] | [INFO] [stdout] 809 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/main.rs:817:4 [INFO] [stdout] | [INFO] [stdout] 817 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> src/main.rs:821:4 [INFO] [stdout] | [INFO] [stdout] 821 | fn largest(list: &[T]) -> &T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point_generic` is never constructed [INFO] [stdout] --> src/main.rs:833:8 [INFO] [stdout] | [INFO] [stdout] 833 | struct Point_generic { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> src/main.rs:839:8 [INFO] [stdout] | [INFO] [stdout] 838 | impl Point_generic { [INFO] [stdout] | ------------------------ method in this implementation [INFO] [stdout] 839 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `distance_from_origin` is never used [INFO] [stdout] --> src/main.rs:847:8 [INFO] [stdout] | [INFO] [stdout] 846 | impl Point_generic { [INFO] [stdout] | ----------------------- method in this implementation [INFO] [stdout] 847 | fn distance_from_origin(&self) -> f32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point_multi` is never constructed [INFO] [stdout] --> src/main.rs:853:8 [INFO] [stdout] | [INFO] [stdout] 853 | struct Point_multi { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `mixup` is never used [INFO] [stdout] --> src/main.rs:859:8 [INFO] [stdout] | [INFO] [stdout] 858 | impl Point_multi { [INFO] [stdout] | -------------------------------- method in this implementation [INFO] [stdout] 859 | fn mixup(self, other: Point_multi) -> Point_multi { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generics_example` is never used [INFO] [stdout] --> src/main.rs:869:4 [INFO] [stdout] | [INFO] [stdout] 869 | fn generics_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `trait_example` is never used [INFO] [stdout] --> src/main.rs:889:4 [INFO] [stdout] | [INFO] [stdout] 889 | fn trait_example() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest` is never used [INFO] [stdout] --> src/main.rs:917:4 [INFO] [stdout] | [INFO] [stdout] 917 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed [INFO] [stdout] --> src/main.rs:921:8 [INFO] [stdout] | [INFO] [stdout] 921 | struct ImportantExcerpt<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `announce_and_return_part` is never used [INFO] [stdout] --> src/main.rs:926:8 [INFO] [stdout] | [INFO] [stdout] 925 | impl<'a> ImportantExcerpt<'a> { [INFO] [stdout] | ----------------------------- method in this implementation [INFO] [stdout] 926 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_with_an_announcement` is never used [INFO] [stdout] --> src/main.rs:933:4 [INFO] [stdout] | [INFO] [stdout] 933 | fn longest_with_an_announcement<'a, T>( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `lifetime_example` is never used [INFO] [stdout] --> src/main.rs:945:4 [INFO] [stdout] | [INFO] [stdout] 945 | fn lifetime_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:789:5 [INFO] [stdout] | [INFO] [stdout] 789 | read_username_from_file(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 789 | let _ = read_username_from_file(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.13s [INFO] running `Command { std: "docker" "inspect" "431f9d1888abad4c098784af7563754a56abcd21a3a88385560ec92a1edc5053", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "431f9d1888abad4c098784af7563754a56abcd21a3a88385560ec92a1edc5053", kill_on_drop: false }` [INFO] [stdout] 431f9d1888abad4c098784af7563754a56abcd21a3a88385560ec92a1edc5053 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 399a7d967b0c7c6a56e43989c7aaec2c86d1e4905a90bd08994a4a3f78b2cb9f [INFO] running `Command { std: "docker" "start" "-a" "399a7d967b0c7c6a56e43989c7aaec2c86d1e4905a90bd08994a4a3f78b2cb9f", kill_on_drop: false }` [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> src/art.rs:31:16 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> src/art.rs:31:34 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/lib.rs:48:28 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/lib.rs:48:35 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Pair` is never constructed [INFO] [stdout] --> src/lib.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | struct Pair { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/lib.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl Pair { [INFO] [stdout] | --------------- associated function in this implementation [INFO] [stdout] 12 | 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/lib.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Pair { [INFO] [stdout] | ------------------------------------- method in this implementation [INFO] [stdout] 18 | fn cmp_display(&self) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `deliver_order` is never used [INFO] [stdout] --> src/lib.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn deliver_order() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `function1` is never used [INFO] [stdout] --> src/lib.rs:172:4 [INFO] [stdout] | [INFO] [stdout] 172 | fn function1() -> Result { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `function2` is never used [INFO] [stdout] --> src/lib.rs:178:4 [INFO] [stdout] | [INFO] [stdout] 178 | fn function2() -> IoResult<()> { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Shoe` is never constructed [INFO] [stdout] --> src/lib.rs:199:8 [INFO] [stdout] | [INFO] [stdout] 199 | struct Shoe { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `shoes_in_size` is never used [INFO] [stdout] --> src/lib.rs:204:4 [INFO] [stdout] | [INFO] [stdout] 204 | fn shoes_in_size(shoes: Vec, shoe_size: u32) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `seat_at_table` is never used [INFO] [stdout] --> src/front_of_house/hosting.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_order` is never used [INFO] [stdout] --> src/front_of_house.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `serve_order` is never used [INFO] [stdout] --> src/front_of_house.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_payment` is never used [INFO] [stdout] --> src/front_of_house.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `seasonal_fruit` is never read [INFO] [stdout] --> src/lib.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 128 | pub struct Breakfast { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 129 | pub toast: String, [INFO] [stdout] 130 | seasonal_fruit: String, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `eat_at_restaurant` is never used [INFO] [stdout] --> src/lib.rs:164:12 [INFO] [stdout] | [INFO] [stdout] 164 | pub fn eat_at_restaurant() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling rust_beginner v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `c1` [INFO] [stdout] --> src/art.rs:31:16 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c2` [INFO] [stdout] --> src/art.rs:31:34 [INFO] [stdout] | [INFO] [stdout] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/lib.rs:48:28 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `u` [INFO] [stdout] --> src/lib.rs:48:35 [INFO] [stdout] | [INFO] [stdout] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Pair` is never constructed [INFO] [stdout] --> src/lib.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | struct Pair { [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/lib.rs:12:8 [INFO] [stdout] | [INFO] [stdout] 11 | impl Pair { [INFO] [stdout] | --------------- associated function in this implementation [INFO] [stdout] 12 | 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/lib.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Pair { [INFO] [stdout] | ------------------------------------- method in this implementation [INFO] [stdout] 18 | fn cmp_display(&self) { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `deliver_order` is never used [INFO] [stdout] --> src/lib.rs:116:4 [INFO] [stdout] | [INFO] [stdout] 116 | fn deliver_order() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `function1` is never used [INFO] [stdout] --> src/lib.rs:172:4 [INFO] [stdout] | [INFO] [stdout] 172 | fn function1() -> Result { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `function2` is never used [INFO] [stdout] --> src/lib.rs:178:4 [INFO] [stdout] | [INFO] [stdout] 178 | fn function2() -> IoResult<()> { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `seat_at_table` is never used [INFO] [stdout] --> src/front_of_house/hosting.rs:6:12 [INFO] [stdout] | [INFO] [stdout] 6 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_order` is never used [INFO] [stdout] --> src/front_of_house.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `serve_order` is never used [INFO] [stdout] --> src/front_of_house.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn serve_order() {} [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_payment` is never used [INFO] [stdout] --> src/front_of_house.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `seasonal_fruit` is never read [INFO] [stdout] --> src/lib.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 128 | pub struct Breakfast { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 129 | pub toast: String, [INFO] [stdout] 130 | seasonal_fruit: String, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `eat_at_restaurant` is never used [INFO] [stdout] --> src/lib.rs:164:12 [INFO] [stdout] | [INFO] [stdout] 164 | pub fn eat_at_restaurant() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `crate::garden::vegetables::Asparagus` [INFO] [stdout] --> src/main.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | use crate::garden::vegetables::Asparagus; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rust_beginner::art::PrimaryColor` [INFO] [stdout] --> src/main.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 15 | use rust_beginner::art::PrimaryColor; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `core::num` [INFO] [stdout] --> src/main.rs:20:5 [INFO] [stdout] | [INFO] [stdout] 20 | use core::num; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::ErrorKind` [INFO] [stdout] --> src/main.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 24 | use std::io::ErrorKind; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `Point_generic` should have an upper camel case name [INFO] [stdout] --> src/main.rs:833:8 [INFO] [stdout] | [INFO] [stdout] 833 | struct Point_generic { [INFO] [stdout] | ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PointGeneric` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `Point_multi` should have an upper camel case name [INFO] [stdout] --> src/main.rs:853:8 [INFO] [stdout] | [INFO] [stdout] 853 | struct Point_multi { [INFO] [stdout] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `PointMulti` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tup` [INFO] [stdout] --> src/main.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 36 | let tup: (i32, f64, u8) = (500, 6.4, 1); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_tup` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/main.rs:41:9 [INFO] [stdout] | [INFO] [stdout] 41 | let a:[i32; 5] = [1, 2, 3, 4, 5]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:99:9 [INFO] [stdout] | [INFO] [stdout] 99 | let mut spaces = " "; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `spaces` [INFO] [stdout] --> src/main.rs:92:9 [INFO] [stdout] | [INFO] [stdout] 92 | let spaces = spaces.len(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/main.rs:147:9 [INFO] [stdout] | [INFO] [stdout] 147 | let a = [1, 2, 3, 4, 5]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:230:9 [INFO] [stdout] | [INFO] [stdout] 230 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `some_string` [INFO] [stdout] --> src/main.rs:313:11 [INFO] [stdout] | [INFO] [stdout] 313 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `black` [INFO] [stdout] --> src/main.rs:356:9 [INFO] [stdout] | [INFO] [stdout] 356 | let black = Color(0, 0, 0); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `origin` [INFO] [stdout] --> src/main.rs:357:9 [INFO] [stdout] | [INFO] [stdout] 357 | let origin = Point(0, 0, 0); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user1` [INFO] [stdout] --> src/main.rs:410:9 [INFO] [stdout] | [INFO] [stdout] 410 | let user1 = build_user( [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `user3` [INFO] [stdout] --> src/main.rs:424:9 [INFO] [stdout] | [INFO] [stdout] 424 | let user3 = User { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `home` [INFO] [stdout] --> src/main.rs:456:9 [INFO] [stdout] | [INFO] [stdout] 456 | let home = IpAddr::V4(String::from("127.0.0.1")); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_home` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `loopback` [INFO] [stdout] --> src/main.rs:457:9 [INFO] [stdout] | [INFO] [stdout] 457 | 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: variable `count` is assigned to, but never used [INFO] [stdout] --> src/main.rs:621:9 [INFO] [stdout] | [INFO] [stdout] 621 | let mut count = 0; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: consider using `_count` instead [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `count` is never read [INFO] [stdout] --> src/main.rs:626:13 [INFO] [stdout] | [INFO] [stdout] 626 | count += 1; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v` [INFO] [stdout] --> src/main.rs:754:9 [INFO] [stdout] | [INFO] [stdout] 754 | let v = vec![1, 2, 3]; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `greeting_file_result` [INFO] [stdout] --> src/main.rs:760:9 [INFO] [stdout] | [INFO] [stdout] 760 | let greeting_file_result = File::open("hello.txt"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/main.rs:964:9 [INFO] [stdout] | [INFO] [stdout] 964 | let i = ImportantExcerpt { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `guess_number` is never used [INFO] [stdout] --> src/main.rs:29:4 [INFO] [stdout] | [INFO] [stdout] 29 | fn guess_number() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `const_and_shadowing` is never used [INFO] [stdout] --> src/main.rs:71:4 [INFO] [stdout] | [INFO] [stdout] 71 | fn const_and_shadowing() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `data_type` is never used [INFO] [stdout] --> src/main.rs:105:4 [INFO] [stdout] | [INFO] [stdout] 105 | fn data_type() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `control_flow` is never used [INFO] [stdout] --> src/main.rs:164:4 [INFO] [stdout] | [INFO] [stdout] 164 | fn control_flow() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `take_ownership` is never used [INFO] [stdout] --> src/main.rs:213:4 [INFO] [stdout] | [INFO] [stdout] 213 | fn take_ownership(some_string: String) { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `ownership` is never used [INFO] [stdout] --> src/main.rs:217:4 [INFO] [stdout] | [INFO] [stdout] 217 | fn ownership() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change` is never used [INFO] [stdout] --> src/main.rs:313:4 [INFO] [stdout] | [INFO] [stdout] 313 | fn change(some_string: &String) { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `change_mut` is never used [INFO] [stdout] --> src/main.rs:319:4 [INFO] [stdout] | [INFO] [stdout] 319 | fn change_mut(some_string: &mut String) { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length` is never used [INFO] [stdout] --> src/main.rs:323:4 [INFO] [stdout] | [INFO] [stdout] 323 | fn calculate_length(s: String) -> (usize, String) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `calculate_length_ref` is never used [INFO] [stdout] --> src/main.rs:330:4 [INFO] [stdout] | [INFO] [stdout] 330 | fn calculate_length_ref(s: &String) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `no_dangle` is never used [INFO] [stdout] --> src/main.rs:339:4 [INFO] [stdout] | [INFO] [stdout] 339 | fn no_dangle() -> String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `User` is never constructed [INFO] [stdout] --> src/main.rs:345:8 [INFO] [stdout] | [INFO] [stdout] 345 | struct User { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/main.rs:352:8 [INFO] [stdout] | [INFO] [stdout] 352 | struct Color(i32, i32, i32); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point` is never constructed [INFO] [stdout] --> src/main.rs:353:8 [INFO] [stdout] | [INFO] [stdout] 353 | struct Point(i32, i32, i32); [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `tuple_struct` is never used [INFO] [stdout] --> src/main.rs:355:4 [INFO] [stdout] | [INFO] [stdout] 355 | fn tuple_struct() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `build_user` is never used [INFO] [stdout] --> src/main.rs:360:4 [INFO] [stdout] | [INFO] [stdout] 360 | fn build_user(email: String, username: String) -> User { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `height` is never read [INFO] [stdout] --> src/main.rs:372:5 [INFO] [stdout] | [INFO] [stdout] 370 | struct Rectangle { [INFO] [stdout] | --------- field in this struct [INFO] [stdout] 371 | width: u32, [INFO] [stdout] 372 | height: u32, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `area` and `can_hold` are never used [INFO] [stdout] --> src/main.rs:376:8 [INFO] [stdout] | [INFO] [stdout] 375 | impl Rectangle { [INFO] [stdout] | -------------- methods in this implementation [INFO] [stdout] 376 | fn area(&self) -> u32 { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 380 | fn can_hold(&self, other: &Rectangle) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `square` is never used [INFO] [stdout] --> src/main.rs:386:8 [INFO] [stdout] | [INFO] [stdout] 385 | impl Rectangle { [INFO] [stdout] | -------------- associated function in this implementation [INFO] [stdout] 386 | fn square(size: u32) -> Self { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `struct_dbg` is never used [INFO] [stdout] --> src/main.rs:394:4 [INFO] [stdout] | [INFO] [stdout] 394 | fn struct_dbg() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `struct_example` is never used [INFO] [stdout] --> src/main.rs:407:4 [INFO] [stdout] | [INFO] [stdout] 407 | fn struct_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddrKind` is never used [INFO] [stdout] --> src/main.rs:432:6 [INFO] [stdout] | [INFO] [stdout] 432 | enum IpAddrKind { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `IpAddr` is never used [INFO] [stdout] --> src/main.rs:437:6 [INFO] [stdout] | [INFO] [stdout] 437 | enum IpAddr { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Message` is never used [INFO] [stdout] --> src/main.rs:442:6 [INFO] [stdout] | [INFO] [stdout] 442 | enum Message { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `call` is never used [INFO] [stdout] --> src/main.rs:450:8 [INFO] [stdout] | [INFO] [stdout] 449 | impl Message { [INFO] [stdout] | ------------ method in this implementation [INFO] [stdout] 450 | fn call(&self) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `route` is never used [INFO] [stdout] --> src/main.rs:455:4 [INFO] [stdout] | [INFO] [stdout] 455 | fn route() { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `option_handling_examples` is never used [INFO] [stdout] --> src/main.rs:502:4 [INFO] [stdout] | [INFO] [stdout] 502 | fn option_handling_examples() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `UsState` is never used [INFO] [stdout] --> src/main.rs:569:6 [INFO] [stdout] | [INFO] [stdout] 569 | enum UsState { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `Coin` is never used [INFO] [stdout] --> src/main.rs:579:6 [INFO] [stdout] | [INFO] [stdout] 579 | enum Coin { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `value_in_cents` is never used [INFO] [stdout] --> src/main.rs:586:4 [INFO] [stdout] | [INFO] [stdout] 586 | fn value_in_cents(coin: Coin) -> u8 { [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `plus_one` is never used [INFO] [stdout] --> src/main.rs:598:4 [INFO] [stdout] | [INFO] [stdout] 598 | fn plus_one(x: Option) -> Option { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `catch_all` is never used [INFO] [stdout] --> src/main.rs:605:4 [INFO] [stdout] | [INFO] [stdout] 605 | fn catch_all() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `SpreadsheetCell` is never used [INFO] [stdout] --> src/main.rs:633:6 [INFO] [stdout] | [INFO] [stdout] 633 | enum SpreadsheetCell { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `vec_example` is never used [INFO] [stdout] --> src/main.rs:640:4 [INFO] [stdout] | [INFO] [stdout] 640 | fn vec_example() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `str_example` is never used [INFO] [stdout] --> src/main.rs:680:4 [INFO] [stdout] | [INFO] [stdout] 680 | fn str_example() { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `hash_example` is never used [INFO] [stdout] --> src/main.rs:714:4 [INFO] [stdout] | [INFO] [stdout] 714 | fn hash_example() { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `panic_example` is never used [INFO] [stdout] --> src/main.rs:753:4 [INFO] [stdout] | [INFO] [stdout] 753 | fn panic_example() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> src/main.rs:809:4 [INFO] [stdout] | [INFO] [stdout] 809 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `last_char_of_first_line` is never used [INFO] [stdout] --> src/main.rs:817:4 [INFO] [stdout] | [INFO] [stdout] 817 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `largest` is never used [INFO] [stdout] --> src/main.rs:821:4 [INFO] [stdout] | [INFO] [stdout] 821 | fn largest(list: &[T]) -> &T { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point_generic` is never constructed [INFO] [stdout] --> src/main.rs:833:8 [INFO] [stdout] | [INFO] [stdout] 833 | struct Point_generic { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `x` is never used [INFO] [stdout] --> src/main.rs:839:8 [INFO] [stdout] | [INFO] [stdout] 838 | impl Point_generic { [INFO] [stdout] | ------------------------ method in this implementation [INFO] [stdout] 839 | fn x(&self) -> &T { [INFO] [stdout] | ^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `distance_from_origin` is never used [INFO] [stdout] --> src/main.rs:847:8 [INFO] [stdout] | [INFO] [stdout] 846 | impl Point_generic { [INFO] [stdout] | ----------------------- method in this implementation [INFO] [stdout] 847 | fn distance_from_origin(&self) -> f32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Point_multi` is never constructed [INFO] [stdout] --> src/main.rs:853:8 [INFO] [stdout] | [INFO] [stdout] 853 | struct Point_multi { [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `mixup` is never used [INFO] [stdout] --> src/main.rs:859:8 [INFO] [stdout] | [INFO] [stdout] 858 | impl Point_multi { [INFO] [stdout] | -------------------------------- method in this implementation [INFO] [stdout] 859 | fn mixup(self, other: Point_multi) -> Point_multi { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `generics_example` is never used [INFO] [stdout] --> src/main.rs:869:4 [INFO] [stdout] | [INFO] [stdout] 869 | fn generics_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `trait_example` is never used [INFO] [stdout] --> src/main.rs:889:4 [INFO] [stdout] | [INFO] [stdout] 889 | fn trait_example() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest` is never used [INFO] [stdout] --> src/main.rs:917:4 [INFO] [stdout] | [INFO] [stdout] 917 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `ImportantExcerpt` is never constructed [INFO] [stdout] --> src/main.rs:921:8 [INFO] [stdout] | [INFO] [stdout] 921 | struct ImportantExcerpt<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `announce_and_return_part` is never used [INFO] [stdout] --> src/main.rs:926:8 [INFO] [stdout] | [INFO] [stdout] 925 | impl<'a> ImportantExcerpt<'a> { [INFO] [stdout] | ----------------------------- method in this implementation [INFO] [stdout] 926 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `longest_with_an_announcement` is never used [INFO] [stdout] --> src/main.rs:933:4 [INFO] [stdout] | [INFO] [stdout] 933 | fn longest_with_an_announcement<'a, T>( [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `lifetime_example` is never used [INFO] [stdout] --> src/main.rs:945:4 [INFO] [stdout] | [INFO] [stdout] 945 | fn lifetime_example() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:789:5 [INFO] [stdout] | [INFO] [stdout] 789 | read_username_from_file(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 789 | let _ = read_username_from_file(); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s [INFO] running `Command { std: "docker" "inspect" "399a7d967b0c7c6a56e43989c7aaec2c86d1e4905a90bd08994a4a3f78b2cb9f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "399a7d967b0c7c6a56e43989c7aaec2c86d1e4905a90bd08994a4a3f78b2cb9f", kill_on_drop: false }` [INFO] [stdout] 399a7d967b0c7c6a56e43989c7aaec2c86d1e4905a90bd08994a4a3f78b2cb9f [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] cc57a1aacb4f6e374be75a4bb45ea6a39c54d79e12f26d9be6b1f74882f49a0c [INFO] running `Command { std: "docker" "start" "-a" "cc57a1aacb4f6e374be75a4bb45ea6a39c54d79e12f26d9be6b1f74882f49a0c", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `c1` [INFO] [stderr] --> src/art.rs:31:16 [INFO] [stderr] | [INFO] [stderr] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_c1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `c2` [INFO] [stderr] --> src/art.rs:31:34 [INFO] [stderr] | [INFO] [stderr] 31 | pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_c2` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `t` [INFO] [stderr] --> src/lib.rs:48:28 [INFO] [stderr] | [INFO] [stderr] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `u` [INFO] [stderr] --> src/lib.rs:48:35 [INFO] [stderr] | [INFO] [stderr] 48 | pub fn some_function(t: &T, u: &U) -> i32 [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_u` [INFO] [stderr] [INFO] [stderr] warning: struct `Pair` is never constructed [INFO] [stderr] --> src/lib.rs:6:8 [INFO] [stderr] | [INFO] [stderr] 6 | struct Pair { [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: associated function `new` is never used [INFO] [stderr] --> src/lib.rs:12:8 [INFO] [stderr] | [INFO] [stderr] 11 | impl Pair { [INFO] [stderr] | --------------- associated function in this implementation [INFO] [stderr] 12 | fn new(x: T, y: T) -> Self { [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: method `cmp_display` is never used [INFO] [stderr] --> src/lib.rs:18:8 [INFO] [stderr] | [INFO] [stderr] 17 | impl Pair { [INFO] [stderr] | ------------------------------------- method in this implementation [INFO] [stderr] 18 | fn cmp_display(&self) { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `deliver_order` is never used [INFO] [stderr] --> src/lib.rs:116:4 [INFO] [stderr] | [INFO] [stderr] 116 | fn deliver_order() {} [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `function1` is never used [INFO] [stderr] --> src/lib.rs:172:4 [INFO] [stderr] | [INFO] [stderr] 172 | fn function1() -> Result { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `function2` is never used [INFO] [stderr] --> src/lib.rs:178:4 [INFO] [stderr] | [INFO] [stderr] 178 | fn function2() -> IoResult<()> { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Shoe` is never constructed [INFO] [stderr] --> src/lib.rs:199:8 [INFO] [stderr] | [INFO] [stderr] 199 | struct Shoe { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `shoes_in_size` is never used [INFO] [stderr] --> src/lib.rs:204:4 [INFO] [stderr] | [INFO] [stderr] 204 | fn shoes_in_size(shoes: Vec, shoe_size: u32) -> Vec { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `seat_at_table` is never used [INFO] [stderr] --> src/front_of_house/hosting.rs:6:12 [INFO] [stderr] | [INFO] [stderr] 6 | fn seat_at_table() {} [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `take_order` is never used [INFO] [stderr] --> src/front_of_house.rs:4:8 [INFO] [stderr] | [INFO] [stderr] 4 | fn take_order() {} [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `serve_order` is never used [INFO] [stderr] --> src/front_of_house.rs:6:8 [INFO] [stderr] | [INFO] [stderr] 6 | fn serve_order() {} [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `take_payment` is never used [INFO] [stderr] --> src/front_of_house.rs:8:8 [INFO] [stderr] | [INFO] [stderr] 8 | fn take_payment() {} [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field `seasonal_fruit` is never read [INFO] [stderr] --> src/lib.rs:130:9 [INFO] [stderr] | [INFO] [stderr] 128 | pub struct Breakfast { [INFO] [stderr] | --------- field in this struct [INFO] [stderr] 129 | pub toast: String, [INFO] [stderr] 130 | seasonal_fruit: String, [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `eat_at_restaurant` is never used [INFO] [stderr] --> src/lib.rs:164:12 [INFO] [stderr] | [INFO] [stderr] 164 | pub fn eat_at_restaurant() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `rust_beginner` (lib) generated 18 warnings (run `cargo fix --lib -p rust_beginner` to apply 4 suggestions) [INFO] [stderr] warning: `rust_beginner` (lib test) generated 16 warnings (16 duplicates) [INFO] [stderr] warning: unused import: `crate::garden::vegetables::Asparagus` [INFO] [stderr] --> src/main.rs:9:5 [INFO] [stderr] | [INFO] [stderr] 9 | use crate::garden::vegetables::Asparagus; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `rust_beginner::art::PrimaryColor` [INFO] [stderr] --> src/main.rs:15:5 [INFO] [stderr] | [INFO] [stderr] 15 | use rust_beginner::art::PrimaryColor; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `core::num` [INFO] [stderr] --> src/main.rs:20:5 [INFO] [stderr] | [INFO] [stderr] 20 | use core::num; [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::io::ErrorKind` [INFO] [stderr] --> src/main.rs:24:5 [INFO] [stderr] | [INFO] [stderr] 24 | use std::io::ErrorKind; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: type `Point_generic` should have an upper camel case name [INFO] [stderr] --> src/main.rs:833:8 [INFO] [stderr] | [INFO] [stderr] 833 | struct Point_generic { [INFO] [stderr] | ^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PointGeneric` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_camel_case_types)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: type `Point_multi` should have an upper camel case name [INFO] [stderr] --> src/main.rs:853:8 [INFO] [stderr] | [INFO] [stderr] 853 | struct Point_multi { [INFO] [stderr] | ^^^^^^^^^^^ help: convert the identifier to upper camel case: `PointMulti` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `tup` [INFO] [stderr] --> src/main.rs:36:9 [INFO] [stderr] | [INFO] [stderr] 36 | let tup: (i32, f64, u8) = (500, 6.4, 1); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_tup` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/main.rs:41:9 [INFO] [stderr] | [INFO] [stderr] 41 | let a:[i32; 5] = [1, 2, 3, 4, 5]; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:99:9 [INFO] [stderr] | [INFO] [stderr] 99 | let mut spaces = " "; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `spaces` [INFO] [stderr] --> src/main.rs:92:9 [INFO] [stderr] | [INFO] [stderr] 92 | let spaces = spaces.len(); [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/main.rs:147:9 [INFO] [stderr] | [INFO] [stderr] 147 | let a = [1, 2, 3, 4, 5]; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:230:9 [INFO] [stderr] | [INFO] [stderr] 230 | let mut s = String::from("hello"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `some_string` [INFO] [stderr] --> src/main.rs:313:11 [INFO] [stderr] | [INFO] [stderr] 313 | fn change(some_string: &String) { [INFO] [stderr] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `black` [INFO] [stderr] --> src/main.rs:356:9 [INFO] [stderr] | [INFO] [stderr] 356 | let black = Color(0, 0, 0); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_black` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `origin` [INFO] [stderr] --> src/main.rs:357:9 [INFO] [stderr] | [INFO] [stderr] 357 | let origin = Point(0, 0, 0); [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `user1` [INFO] [stderr] --> src/main.rs:410:9 [INFO] [stderr] | [INFO] [stderr] 410 | let user1 = build_user( [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `user3` [INFO] [stderr] --> src/main.rs:424:9 [INFO] [stderr] | [INFO] [stderr] 424 | let user3 = User { [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `home` [INFO] [stderr] --> src/main.rs:456:9 [INFO] [stderr] | [INFO] [stderr] 456 | let home = IpAddr::V4(String::from("127.0.0.1")); [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_home` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `loopback` [INFO] [stderr] --> src/main.rs:457:9 [INFO] [stderr] | [INFO] [stderr] 457 | 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: variable `count` is assigned to, but never used [INFO] [stderr] --> src/main.rs:621:9 [INFO] [stderr] | [INFO] [stderr] 621 | let mut count = 0; [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_count` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `count` is never read [INFO] [stderr] --> src/main.rs:626:13 [INFO] [stderr] | [INFO] [stderr] 626 | count += 1; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `v` [INFO] [stderr] --> src/main.rs:754:9 [INFO] [stderr] | [INFO] [stderr] 754 | let v = vec![1, 2, 3]; [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_v` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `greeting_file_result` [INFO] [stderr] --> src/main.rs:760:9 [INFO] [stderr] | [INFO] [stderr] 760 | let greeting_file_result = File::open("hello.txt"); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `i` [INFO] [stderr] --> src/main.rs:964:9 [INFO] [stderr] | [INFO] [stderr] 964 | let i = ImportantExcerpt { [INFO] [stderr] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stderr] [INFO] [stderr] warning: function `guess_number` is never used [INFO] [stderr] --> src/main.rs:29:4 [INFO] [stderr] | [INFO] [stderr] 29 | fn guess_number() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] [INFO] [stderr] warning: function `const_and_shadowing` is never used [INFO] [stderr] --> src/main.rs:71:4 [INFO] [stderr] | [INFO] [stderr] 71 | fn const_and_shadowing() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `data_type` is never used [INFO] [stderr] --> src/main.rs:105:4 [INFO] [stderr] | [INFO] [stderr] 105 | fn data_type() { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `control_flow` is never used [INFO] [stderr] --> src/main.rs:164:4 [INFO] [stderr] | [INFO] [stderr] 164 | fn control_flow() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `take_ownership` is never used [INFO] [stderr] --> src/main.rs:213:4 [INFO] [stderr] | [INFO] [stderr] 213 | fn take_ownership(some_string: String) { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `ownership` is never used [INFO] [stderr] --> src/main.rs:217:4 [INFO] [stderr] | [INFO] [stderr] 217 | fn ownership() { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `change` is never used [INFO] [stderr] --> src/main.rs:313:4 [INFO] [stderr] | [INFO] [stderr] 313 | fn change(some_string: &String) { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `change_mut` is never used [INFO] [stderr] --> src/main.rs:319:4 [INFO] [stderr] | [INFO] [stderr] 319 | fn change_mut(some_string: &mut String) { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `calculate_length` is never used [INFO] [stderr] --> src/main.rs:323:4 [INFO] [stderr] | [INFO] [stderr] 323 | fn calculate_length(s: String) -> (usize, String) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `calculate_length_ref` is never used [INFO] [stderr] --> src/main.rs:330:4 [INFO] [stderr] | [INFO] [stderr] 330 | fn calculate_length_ref(s: &String) -> usize { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `no_dangle` is never used [INFO] [stderr] --> src/main.rs:339:4 [INFO] [stderr] | [INFO] [stderr] 339 | fn no_dangle() -> String { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `User` is never constructed [INFO] [stderr] --> src/main.rs:345:8 [INFO] [stderr] | [INFO] [stderr] 345 | struct User { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Color` is never constructed [INFO] [stderr] --> src/main.rs:352:8 [INFO] [stderr] | [INFO] [stderr] 352 | struct Color(i32, i32, i32); [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Point` is never constructed [INFO] [stderr] --> src/main.rs:353:8 [INFO] [stderr] | [INFO] [stderr] 353 | struct Point(i32, i32, i32); [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `tuple_struct` is never used [INFO] [stderr] --> src/main.rs:355:4 [INFO] [stderr] | [INFO] [stderr] 355 | fn tuple_struct() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `build_user` is never used [INFO] [stderr] --> src/main.rs:360:4 [INFO] [stderr] | [INFO] [stderr] 360 | fn build_user(email: String, username: String) -> User { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: field `height` is never read [INFO] [stderr] --> src/main.rs:372:5 [INFO] [stderr] | [INFO] [stderr] 370 | struct Rectangle { [INFO] [stderr] | --------- field in this struct [INFO] [stderr] 371 | width: u32, [INFO] [stderr] 372 | height: u32, [INFO] [stderr] | ^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stderr] [INFO] [stderr] warning: methods `area` and `can_hold` are never used [INFO] [stderr] --> src/main.rs:376:8 [INFO] [stderr] | [INFO] [stderr] 375 | impl Rectangle { [INFO] [stderr] | -------------- methods in this implementation [INFO] [stderr] 376 | fn area(&self) -> u32 { [INFO] [stderr] | ^^^^ [INFO] [stderr] ... [INFO] [stderr] 380 | fn can_hold(&self, other: &Rectangle) -> bool { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: associated function `square` is never used [INFO] [stderr] --> src/main.rs:386:8 [INFO] [stderr] | [INFO] [stderr] 385 | impl Rectangle { [INFO] [stderr] | -------------- associated function in this implementation [INFO] [stderr] 386 | fn square(size: u32) -> Self { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `struct_dbg` is never used [INFO] [stderr] --> src/main.rs:394:4 [INFO] [stderr] | [INFO] [stderr] 394 | fn struct_dbg() { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `struct_example` is never used [INFO] [stderr] --> src/main.rs:407:4 [INFO] [stderr] | [INFO] [stderr] 407 | fn struct_example() { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `IpAddrKind` is never used [INFO] [stderr] --> src/main.rs:432:6 [INFO] [stderr] | [INFO] [stderr] 432 | enum IpAddrKind { [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `IpAddr` is never used [INFO] [stderr] --> src/main.rs:437:6 [INFO] [stderr] | [INFO] [stderr] 437 | enum IpAddr { [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `Message` is never used [INFO] [stderr] --> src/main.rs:442:6 [INFO] [stderr] | [INFO] [stderr] 442 | enum Message { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method `call` is never used [INFO] [stderr] --> src/main.rs:450:8 [INFO] [stderr] | [INFO] [stderr] 449 | impl Message { [INFO] [stderr] | ------------ method in this implementation [INFO] [stderr] 450 | fn call(&self) { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `route` is never used [INFO] [stderr] --> src/main.rs:455:4 [INFO] [stderr] | [INFO] [stderr] 455 | fn route() { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `option_handling_examples` is never used [INFO] [stderr] --> src/main.rs:502:4 [INFO] [stderr] | [INFO] [stderr] 502 | fn option_handling_examples() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `UsState` is never used [INFO] [stderr] --> src/main.rs:569:6 [INFO] [stderr] | [INFO] [stderr] 569 | enum UsState { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `Coin` is never used [INFO] [stderr] --> src/main.rs:579:6 [INFO] [stderr] | [INFO] [stderr] 579 | enum Coin { [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `value_in_cents` is never used [INFO] [stderr] --> src/main.rs:586:4 [INFO] [stderr] | [INFO] [stderr] 586 | fn value_in_cents(coin: Coin) -> u8 { [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `plus_one` is never used [INFO] [stderr] --> src/main.rs:598:4 [INFO] [stderr] | [INFO] [stderr] 598 | fn plus_one(x: Option) -> Option { [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `catch_all` is never used [INFO] [stderr] --> src/main.rs:605:4 [INFO] [stderr] | [INFO] [stderr] 605 | fn catch_all() { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: enum `SpreadsheetCell` is never used [INFO] [stderr] --> src/main.rs:633:6 [INFO] [stderr] | [INFO] [stderr] 633 | enum SpreadsheetCell { [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `vec_example` is never used [INFO] [stderr] --> src/main.rs:640:4 [INFO] [stderr] | [INFO] [stderr] 640 | fn vec_example() { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `str_example` is never used [INFO] [stderr] --> src/main.rs:680:4 [INFO] [stderr] | [INFO] [stderr] 680 | fn str_example() { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `hash_example` is never used [INFO] [stderr] --> src/main.rs:714:4 [INFO] [stderr] | [INFO] [stderr] 714 | fn hash_example() { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `panic_example` is never used [INFO] [stderr] --> src/main.rs:753:4 [INFO] [stderr] | [INFO] [stderr] 753 | fn panic_example() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `read_username_from_file` is never used [INFO] [stderr] --> src/main.rs:809:4 [INFO] [stderr] | [INFO] [stderr] 809 | fn read_username_from_file() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `last_char_of_first_line` is never used [INFO] [stderr] --> src/main.rs:817:4 [INFO] [stderr] | [INFO] [stderr] 817 | fn last_char_of_first_line(text: &str) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `largest` is never used [INFO] [stderr] --> src/main.rs:821:4 [INFO] [stderr] | [INFO] [stderr] 821 | fn largest(list: &[T]) -> &T { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Point_generic` is never constructed [INFO] [stderr] --> src/main.rs:833:8 [INFO] [stderr] | [INFO] [stderr] 833 | struct Point_generic { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method `x` is never used [INFO] [stderr] --> src/main.rs:839:8 [INFO] [stderr] | [INFO] [stderr] 838 | impl Point_generic { [INFO] [stderr] | ------------------------ method in this implementation [INFO] [stderr] 839 | fn x(&self) -> &T { [INFO] [stderr] | ^ [INFO] [stderr] [INFO] [stderr] warning: method `distance_from_origin` is never used [INFO] [stderr] --> src/main.rs:847:8 [INFO] [stderr] | [INFO] [stderr] 846 | impl Point_generic { [INFO] [stderr] | ----------------------- method in this implementation [INFO] [stderr] 847 | fn distance_from_origin(&self) -> f32 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `Point_multi` is never constructed [INFO] [stderr] --> src/main.rs:853:8 [INFO] [stderr] | [INFO] [stderr] 853 | struct Point_multi { [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method `mixup` is never used [INFO] [stderr] --> src/main.rs:859:8 [INFO] [stderr] | [INFO] [stderr] 858 | impl Point_multi { [INFO] [stderr] | -------------------------------- method in this implementation [INFO] [stderr] 859 | fn mixup(self, other: Point_multi) -> Point_multi { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `generics_example` is never used [INFO] [stderr] --> src/main.rs:869:4 [INFO] [stderr] | [INFO] [stderr] 869 | fn generics_example() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `trait_example` is never used [INFO] [stderr] --> src/main.rs:889:4 [INFO] [stderr] | [INFO] [stderr] 889 | fn trait_example() { [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `longest` is never used [INFO] [stderr] --> src/main.rs:917:4 [INFO] [stderr] | [INFO] [stderr] 917 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct `ImportantExcerpt` is never constructed [INFO] [stderr] --> src/main.rs:921:8 [INFO] [stderr] | [INFO] [stderr] 921 | struct ImportantExcerpt<'a> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method `announce_and_return_part` is never used [INFO] [stderr] --> src/main.rs:926:8 [INFO] [stderr] | [INFO] [stderr] 925 | impl<'a> ImportantExcerpt<'a> { [INFO] [stderr] | ----------------------------- method in this implementation [INFO] [stderr] 926 | fn announce_and_return_part(&self, announcement: &str) -> &str { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `longest_with_an_announcement` is never used [INFO] [stderr] --> src/main.rs:933:4 [INFO] [stderr] | [INFO] [stderr] 933 | fn longest_with_an_announcement<'a, T>( [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function `lifetime_example` is never used [INFO] [stderr] --> src/main.rs:945:4 [INFO] [stderr] | [INFO] [stderr] 945 | fn lifetime_example() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `Result` that must be used [INFO] [stderr] --> src/main.rs:789:5 [INFO] [stderr] | [INFO] [stderr] 789 | read_username_from_file(); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 789 | let _ = read_username_from_file(); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: `rust_beginner` (bin "rust_beginner" test) generated 77 warnings (run `cargo fix --bin "rust_beginner" -p rust_beginner --tests` to apply 20 suggestions) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rust_beginner-248d28706a8043db) [INFO] [stdout] [INFO] [stdout] running 2 tests [INFO] [stdout] test iterator_sum ... ok [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_beginner-20022ad521357769) [INFO] [stdout] test tests::filters_by_size ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s [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] Doc-tests rust_beginner [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" "cc57a1aacb4f6e374be75a4bb45ea6a39c54d79e12f26d9be6b1f74882f49a0c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cc57a1aacb4f6e374be75a4bb45ea6a39c54d79e12f26d9be6b1f74882f49a0c", kill_on_drop: false }` [INFO] [stdout] cc57a1aacb4f6e374be75a4bb45ea6a39c54d79e12f26d9be6b1f74882f49a0c