[INFO] cloning repository https://github.com/AndryMaster/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AndryMaster/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndryMaster%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndryMaster%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7f281cce932342652405117e7bc36b02de2c759
[INFO] testing AndryMaster/rust-learning against master#d98a5da813da67eb189387b8ccfb73cf481275d8+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAndryMaster%2Frust-learning" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AndryMaster/rust-learning
[INFO] finished tweaking git repo https://github.com/AndryMaster/rust-learning
[INFO] tweaked toml for git repo https://github.com/AndryMaster/rust-learning written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AndryMaster/rust-learning on toolchain d98a5da813da67eb189387b8ccfb73cf481275d8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AndryMaster/rust-learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b7f5fd185efd69f342fad62a81f9f3ff0d4017d11848e5244f857ac3d93b3ab2
[INFO] running `Command { std: "docker" "start" "-a" "b7f5fd185efd69f342fad62a81f9f3ff0d4017d11848e5244f857ac3d93b3ab2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b7f5fd185efd69f342fad62a81f9f3ff0d4017d11848e5244f857ac3d93b3ab2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7f5fd185efd69f342fad62a81f9f3ff0d4017d11848e5244f857ac3d93b3ab2", kill_on_drop: false }`
[INFO] [stdout] b7f5fd185efd69f342fad62a81f9f3ff0d4017d11848e5244f857ac3d93b3ab2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6177c3ca0960130429d0458c64a4e3cb1ea96691ddeea6b6fd14eb3fbd0a8c8f
[INFO] running `Command { std: "docker" "start" "-a" "6177c3ca0960130429d0458c64a4e3cb1ea96691ddeea6b6fd14eb3fbd0a8c8f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `clone` and `cmp::Ordering`
[INFO] [stdout]  --> src/rust_7.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{cmp::Ordering, clone};
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `self`
[INFO] [stdout]  --> src/rust_7.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]   --> src/rust_7.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::f64::INFINITY`
[INFO] [stdout]  --> src/rust_9.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::f64::INFINITY;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let b: i8 = 127;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let b: i32 = 1_000_000_000;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let b: isize = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let b = 1_456_i16;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/part_2.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let f: f32 = 2.0004;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let b: bool = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num1`
[INFO] [stdout]   --> src/part_2.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let num1 = sum1(5, 2);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num3`
[INFO] [stdout]   --> src/part_2.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let num3 = sum3(5, 2);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `season` is never read
[INFO] [stdout]   --> src/part_3.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let mut season = Season::Spring;
[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: `res`
[INFO] [stdout]   --> src/part_4.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let res = create_let();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_older`
[INFO] [stdout]   --> src/part_5_1.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let is_older = tom.is_older(&bob);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_older`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sam`
[INFO] [stdout]   --> src/part_5_1.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let sam = Person::create("Sam", 12);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sam`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/part_7.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let message = String::new();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/part_7.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let message = String::from("Hello");
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `people`
[INFO] [stdout]    --> src/part_7.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let mut people = vec![
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_people`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/part_7.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let mut people = vec![
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust_4.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     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: `secret_number`
[INFO] [stdout]   --> src/rust_7.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let secret_number = rand::rng().random_range(1..=100);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secret_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust_8.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/rust_8.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     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/rust_8.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let s = String::new();
[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/rust_8.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let s = String::from("text");
[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/rust_8.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let s = "text".to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/rust_8.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let hello = String::from("안녕하세요");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/rust_8.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/rust_8.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let hello = String::from("Hello");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hell`
[INFO] [stdout]   --> src/rust_8.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |     let hell = &hello[0..4];
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hell`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]   --> src/rust_8.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let score = scores.get(&team_name).copied().unwrap_or(0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> src/rust_9.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let greeting_file = greeting_file_result
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/part_12.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let x = *n1;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/part_12.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     *num_pointer = *num_pointer * 2;
[INFO] [stdout]    |     ^^^^^^^^^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stdout]   --> src/part_12.rs:55:1
[INFO] [stdout]    |
[INFO] [stdout] 55 | unsafe fn test(num_pointer: *mut u32){
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unsafe_op_in_unsafe_fn)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/part_12.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 |     *num_pointer = *num_pointer * 2;
[INFO] [stdout]    |                    ^^^^^^^^^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_one_v2`
[INFO] [stdout]   --> src/rust_13.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let add_one_v2 = |x: u32| -> u32 { x + 1 };
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/rust_15.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let d = MySmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust_16.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |             for i in 0..5 {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> src/rust_18_2.rs:34:27
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `metanit` is never used
[INFO] [stdout]   --> src/main.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn metanit () {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rust_book` is never used
[INFO] [stdout]   --> src/main.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn rust_book() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_start` is never used
[INFO] [stdout]  --> src/part_2.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_start() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_let_type` is never used
[INFO] [stdout]  --> src/part_2.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn f2_let_type() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_if_match` is never used
[INFO] [stdout]   --> src/part_2.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn f3_if_match() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_loops` is never used
[INFO] [stdout]   --> src/part_2.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn f4_loops() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_fn` is never used
[INFO] [stdout]   --> src/part_2.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn f5_fn() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_const` is never used
[INFO] [stdout]    --> src/part_2.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn f6_const() {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_fn2` is never used
[INFO] [stdout]    --> src/part_2.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn f7_fn2() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_tuple` is never used
[INFO] [stdout]  --> src/part_3.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_tuple() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_array` is never used
[INFO] [stdout]   --> src/part_3.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn f2_array() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_struct` is never used
[INFO] [stdout]   --> src/part_3.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn f3_struct() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_enum` is never used
[INFO] [stdout]   --> src/part_3.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f4_enum() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_owner` is never used
[INFO] [stdout]  --> src/part_4.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_owner() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_reference` is never used
[INFO] [stdout]   --> src/part_4.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn f2_reference() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_return_ref` is never used
[INFO] [stdout]   --> src/part_4.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn f3_return_ref() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_mut_reference` is never used
[INFO] [stdout]   --> src/part_4.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn f4_mut_reference() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_owner_2` is never used
[INFO] [stdout]   --> src/part_4.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn f5_owner_2() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_owner_3` is never used
[INFO] [stdout]    --> src/part_4.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub fn f6_owner_3() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_impl` is never used
[INFO] [stdout]  --> src/part_5_1.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn f1_impl() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/part_5_1.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Person
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `display`, `change_age`, `is_older`, `say_hello`, and `create` are never used
[INFO] [stdout]   --> src/part_5_1.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl Person {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 27 |     fn display(&self){
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn change_age(&mut self, age: u8){
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn is_older(&self, other: &Person) -> bool{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn say_hello(&self, other: &Person, hour: u8){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn create(user_name: &str, user_age: u8) -> Self{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_trait` is never used
[INFO] [stdout]   --> src/part_5_1.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn f2_trait() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Printer` is never used
[INFO] [stdout]   --> src/part_5_1.rs:63:7
[INFO] [stdout]    |
[INFO] [stdout] 63 | trait Printer{
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Message` is never constructed
[INFO] [stdout]   --> src/part_5_1.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct Message { text: String }
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_trait2` is never used
[INFO] [stdout]   --> src/part_5_1.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f3_trait2() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display` is never used
[INFO] [stdout]   --> src/part_5_1.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn display(printable: &impl Printer) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_generic` is never used
[INFO] [stdout]   --> src/part_5_1.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub fn f4_generic() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]    --> src/part_5_1.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct User<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]    --> src/part_5_1.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | struct Point<T> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_overload` is never used
[INFO] [stdout]    --> src/part_5_1.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub fn f5_overload() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_type` is never used
[INFO] [stdout]  --> src/part_5_2.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f6_type() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Circle { radius:f64 }
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Rectangle { width:f64, height:f64 }
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Shape` is never used
[INFO] [stdout]   --> src/part_5_2.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Shape{
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Area` is never used
[INFO] [stdout]   --> src/part_5_2.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 | trait Area {
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_area` is never used
[INFO] [stdout]   --> src/part_5_2.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn print_area(shape: &dyn Area) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_type_trait` is never used
[INFO] [stdout]   --> src/part_5_2.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn f7_type_trait() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `attack` is never used
[INFO] [stdout]   --> src/part_5_2.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn attack<C: Character>() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Character` is never used
[INFO] [stdout]   --> src/part_5_2.rs:66:7
[INFO] [stdout]    |
[INFO] [stdout] 66 | trait Character {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Weapon` is never used
[INFO] [stdout]   --> src/part_5_2.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 73 | trait Weapon {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Knight` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | struct Knight;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Mage` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct Mage;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f8_debug` is never used
[INFO] [stdout]    --> src/part_5_2.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn f8_debug() {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]    --> src/part_5_2.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 | struct Person
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_alive` is never used
[INFO] [stdout]  --> src/part_6.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_alive() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message` is never used
[INFO] [stdout]   --> src/part_6.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn get_message() -> String { "hello".to_string() }
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message2` is never used
[INFO] [stdout]   --> src/part_6.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn get_message2<'a>() -> &'a str { "hello" }
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_alive_fn` is never used
[INFO] [stdout]   --> src/part_6.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn f2_alive_fn() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_name` is never used
[INFO] [stdout]   --> src/part_6.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn check_name(name: &str) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_name_2` is never used
[INFO] [stdout]   --> src/part_6.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn check_name_2<'a>(name: &'a str, default: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_str` is never used
[INFO] [stdout]   --> src/part_6.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn get_str() -> String {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_alive_struct` is never used
[INFO] [stdout]   --> src/part_6.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn f3_alive_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/part_6.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | struct Person<'a> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `print` and `say` are never used
[INFO] [stdout]   --> src/part_6.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | impl<'a> Person<'a>{
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 93 |     fn print(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn say<'b>(&self, text: &'b str) -> &'b str{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_alive_static` is never used
[INFO] [stdout]    --> src/part_6.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn f4_alive_static() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message_static` is never used
[INFO] [stdout]    --> src/part_6.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn get_message_static() -> &'static str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_vec` is never used
[INFO] [stdout]  --> src/part_7.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn f1_vec() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_vec` is never used
[INFO] [stdout]   --> src/part_7.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn f2_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Phones` is never used
[INFO] [stdout]   --> src/part_7.rs:41:6
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum Phones {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_vec` is never used
[INFO] [stdout]   --> src/part_7.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn f3_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_string` is never used
[INFO] [stdout]   --> src/part_7.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn f4_string() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_string` is never used
[INFO] [stdout]   --> src/part_7.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn f5_string() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_hashmap` is never used
[INFO] [stdout]    --> src/part_7.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn f6_hashmap() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_hashset` is never used
[INFO] [stdout]    --> src/part_7.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn f7_hashset() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f8_iterator` is never used
[INFO] [stdout]    --> src/part_7.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 | pub fn f8_iterator() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrimeGenerator` is never constructed
[INFO] [stdout]    --> src/part_7.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 | struct PrimeGenerator {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_prime` is never used
[INFO] [stdout]    --> src/part_7.rs:201:4
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn is_prime(num: u32) -> bool {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]    --> src/part_7.rs:214:8
[INFO] [stdout]     |
[INFO] [stdout] 214 | struct Person{
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simple_game` is never used
[INFO] [stdout]  --> src/rust_2.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn simple_game () {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]  --> src/rust_3.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]  --> src/rust_4.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]   --> src/rust_7.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn f1() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_vec` is never used
[INFO] [stdout]  --> src/rust_8.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn f1_vec() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_vec` is never used
[INFO] [stdout]   --> src/rust_8.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn f2_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_vec` is never used
[INFO] [stdout]   --> src/rust_8.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn f3_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_string` is never used
[INFO] [stdout]   --> src/rust_8.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn f4_string() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_hashmap` is never used
[INFO] [stdout]   --> src/rust_8.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f5_hashmap() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_hashmap` is never used
[INFO] [stdout]   --> src/rust_8.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub fn f6_hashmap() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_panic` is never used
[INFO] [stdout]  --> src/rust_9.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn f1_panic() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_result` is never used
[INFO] [stdout]   --> src/rust_9.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn f2_result() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet_file` is never used
[INFO] [stdout]   --> src/rust_9.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn greet_file() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_1` is never used
[INFO] [stdout]   --> src/rust_9.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn read_username_from_file_1() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_2` is never used
[INFO] [stdout]   --> src/rust_9.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn read_username_from_file_2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_3` is never used
[INFO] [stdout]   --> src/rust_9.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn read_username_from_file_3() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_4` is never used
[INFO] [stdout]   --> src/rust_9.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn read_username_from_file_4() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_generic` is never used
[INFO] [stdout]  --> src/rust_10.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn f1_generic() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/rust_10.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 14 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/rust_10.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_lifetime` is never used
[INFO] [stdout]   --> src/rust_10.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn f2_lifetime() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/rust_10.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]   --> src/rust_10.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn longest_with_an_announcement<'a, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/rust_11.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn add(left: u64, right: u64) -> u64 {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/rust_11.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]   --> src/rust_11.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 11 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Guess` is never constructed
[INFO] [stdout]   --> src/rust_11.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Guess {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/rust_11.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl Guess {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 21 |     pub fn new(value: i32) -> Guess {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `squared_number` is never used
[INFO] [stdout]   --> src/rust_11.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn squared_number(x: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_input` is never used
[INFO] [stdout]  --> src/part_11.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn f1_input() -> io::Result<()> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_unsafe` is never used
[INFO] [stdout]  --> src/part_12.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_unsafe() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_ptr` is never used
[INFO] [stdout]   --> src/part_12.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn f2_ptr() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_fn` is never used
[INFO] [stdout]   --> src/part_12.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn f3_fn() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/part_12.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 | unsafe fn test(num_pointer: *mut u32){
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_fn_save` is never used
[INFO] [stdout]   --> src/part_12.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn f3_fn_save() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_save` is never used
[INFO] [stdout]   --> src/part_12.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_save(num: &mut u32){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `COUNTER` is never used
[INFO] [stdout]   --> src/part_12.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 | static COUNTER: u32 = 1;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `STATIC_VAL` is never used
[INFO] [stdout]   --> src/part_12.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 | static mut STATIC_VAL: u32 = 1;
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_static` is never used
[INFO] [stdout]   --> src/part_12.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn f5_static() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/part_12.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn add(n: u32) {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_union` is never used
[INFO] [stdout]    --> src/part_12.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 | pub fn f6_union() {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: union `Symbol` is never used
[INFO] [stdout]    --> src/part_12.rs:123:7
[INFO] [stdout]     |
[INFO] [stdout] 123 | union Symbol {
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_box` is never used
[INFO] [stdout]    --> src/part_12.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 | pub fn f7_box() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f8_box` is never used
[INFO] [stdout]    --> src/part_12.rs:145:8
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub fn f8_box() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]    --> src/part_12.rs:182:8
[INFO] [stdout]     |
[INFO] [stdout] 182 | struct Point{ x: u64, y: u64 }
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]    --> src/part_12.rs:185:6
[INFO] [stdout]     |
[INFO] [stdout] 185 | enum List {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f9_rc` is never used
[INFO] [stdout]    --> src/part_12.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 | pub fn f9_rc() {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_closure` is never used
[INFO] [stdout]  --> src/rust_13.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn f1_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `giveaway` and `most_stocked` are never used
[INFO] [stdout]   --> src/rust_13.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     impl Inventory {
[INFO] [stdout]    |     -------------- methods in this implementation
[INFO] [stdout] 35 |         fn giveaway(&self, user_preference: Option<ShirtColor>) -> ShirtColor {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         fn most_stocked(&self) -> ShirtColor {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_closure` is never used
[INFO] [stdout]   --> src/rust_13.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn f2_closure() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_closure` is never used
[INFO] [stdout]   --> src/rust_13.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub fn f3_closure() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_iter` is never used
[INFO] [stdout]    --> src/rust_13.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn f4_iter() {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_box` is never used
[INFO] [stdout]   --> src/rust_15.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn f1_box() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]   --> src/rust_15.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct MyBox<T>(T);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/rust_15.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<T> MyBox<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 32 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_box` is never used
[INFO] [stdout]   --> src/rust_15.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn f2_box() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MySmartPointer` is never constructed
[INFO] [stdout]   --> src/rust_15.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct MySmartPointer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_ref` is never used
[INFO] [stdout]   --> src/rust_15.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn f3_ref() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List1` is never used
[INFO] [stdout]   --> src/rust_15.rs:89:6
[INFO] [stdout]    |
[INFO] [stdout] 89 | enum List1 {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_ref_cycle` is never used
[INFO] [stdout]   --> src/rust_15.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn f4_ref_cycle() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List2` is never used
[INFO] [stdout]    --> src/rust_15.rs:122:6
[INFO] [stdout]     |
[INFO] [stdout] 122 | enum List2 {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tail` is never used
[INFO] [stdout]    --> src/rust_15.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 126 | impl List2 {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] 127 |     fn tail(&self) -> Option<&RefCell<Rc<List2>>> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_ref_cycle` is never used
[INFO] [stdout]    --> src/rust_15.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout] 139 | pub fn f5_ref_cycle() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]    --> src/rust_15.rs:185:8
[INFO] [stdout]     |
[INFO] [stdout] 185 | struct Node {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_thread` is never used
[INFO] [stdout]  --> src/rust_16.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn f1_thread() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_thread_channel` is never used
[INFO] [stdout]   --> src/rust_16.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn f2_thread_channel() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_thread_mutex` is never used
[INFO] [stdout]   --> src/rust_16.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f3_thread_mutex() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Draw` is never used
[INFO] [stdout]  --> src/rust_18_1.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Draw {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Screen` is never constructed
[INFO] [stdout]  --> src/rust_18_1.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Screen {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/rust_18_1.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Screen {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 10 |     pub fn run(&self) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Button` is never constructed
[INFO] [stdout]   --> src/rust_18_1.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Button {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SelectBox` is never constructed
[INFO] [stdout]   --> src/rust_18_1.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct SelectBox {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_run` is never used
[INFO] [stdout]   --> src/rust_18_1.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn f1_run() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]  --> src/rust_18_2.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Post {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_text`, `content`, `request_review`, and `approve` are never used
[INFO] [stdout]   --> src/rust_18_2.rs:7:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl Post {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 7  |     pub fn new() -> Post {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn content(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn request_review(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn approve(&mut self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `State` is never used
[INFO] [stdout]   --> src/rust_18_2.rs:31:7
[INFO] [stdout]    |
[INFO] [stdout] 31 | trait State {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]   --> src/rust_18_2.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Draft {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PendingReview` is never constructed
[INFO] [stdout]   --> src/rust_18_2.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct PendingReview {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Published` is never constructed
[INFO] [stdout]   --> src/rust_18_2.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Published {}
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_run` is never used
[INFO] [stdout]   --> src/rust_18_2.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | pub fn f2_run() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]  --> src/rust_18_3.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Post {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DraftPost` is never constructed
[INFO] [stdout]  --> src/rust_18_3.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct DraftPost {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PendingReviewPost` is never constructed
[INFO] [stdout]  --> src/rust_18_3.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct PendingReviewPost {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `content` are never used
[INFO] [stdout]   --> src/rust_18_3.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Post {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new() -> DraftPost {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn content(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_text` and `request_review` are never used
[INFO] [stdout]   --> src/rust_18_3.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl DraftPost {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 27 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn request_review(self) -> PendingReviewPost {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `approve` is never used
[INFO] [stdout]   --> src/rust_18_3.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl PendingReviewPost {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 38 |     pub fn approve(self) -> Option<Post> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_run` is never used
[INFO] [stdout]   --> src/rust_18_3.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub fn f3_run() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_connection1` is never used
[INFO] [stdout]   --> src/rust_20_web_server.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn handle_connection1(mut stream: TcpStream) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0133`.
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.14s
[INFO] running `Command { std: "docker" "inspect" "6177c3ca0960130429d0458c64a4e3cb1ea96691ddeea6b6fd14eb3fbd0a8c8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6177c3ca0960130429d0458c64a4e3cb1ea96691ddeea6b6fd14eb3fbd0a8c8f", kill_on_drop: false }`
[INFO] [stdout] 6177c3ca0960130429d0458c64a4e3cb1ea96691ddeea6b6fd14eb3fbd0a8c8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 25db4158165a94d4b51bdcdd130002f5a2f41d2a70fd4f9174e838901e5795cd
[INFO] running `Command { std: "docker" "start" "-a" "25db4158165a94d4b51bdcdd130002f5a2f41d2a70fd4f9174e838901e5795cd", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `clone` and `cmp::Ordering`
[INFO] [stdout]  --> src/rust_7.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{cmp::Ordering, clone};
[INFO] [stdout]   |           ^^^^^^^^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `self`
[INFO] [stdout]  --> src/rust_7.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::*`
[INFO] [stdout]   --> src/rust_7.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::f64::INFINITY`
[INFO] [stdout]  --> src/rust_9.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::f64::INFINITY;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num::NonZeroI32`
[INFO] [stdout]   --> src/rust_11.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     use std::num::NonZeroI32;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Div`
[INFO] [stdout]   --> src/rust_11.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     use std::ops::Div;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let b: i8 = 127;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let b: i32 = 1_000_000_000;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let b: isize = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let b = 1_456_i16;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/part_2.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let f: f32 = 2.0004;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/part_2.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let b: bool = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num1`
[INFO] [stdout]   --> src/part_2.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let num1 = sum1(5, 2);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num3`
[INFO] [stdout]   --> src/part_2.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let num3 = sum3(5, 2);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `season` is never read
[INFO] [stdout]   --> src/part_3.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let mut season = Season::Spring;
[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: `res`
[INFO] [stdout]   --> src/part_4.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let res = create_let();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_older`
[INFO] [stdout]   --> src/part_5_1.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let is_older = tom.is_older(&bob);
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_older`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sam`
[INFO] [stdout]   --> src/part_5_1.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let sam = Person::create("Sam", 12);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sam`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/part_7.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let message = String::new();
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `message`
[INFO] [stdout]   --> src/part_7.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let message = String::from("Hello");
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `people`
[INFO] [stdout]    --> src/part_7.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let mut people = vec![
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_people`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/part_7.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     let mut people = vec![
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/rust_4.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     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: `secret_number`
[INFO] [stdout]   --> src/rust_7.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let secret_number = rand::rng().random_range(1..=100);
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secret_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rust_8.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/rust_8.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     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/rust_8.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let s = String::new();
[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/rust_8.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let s = String::from("text");
[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/rust_8.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |     let s = "text".to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/rust_8.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let hello = String::from("안녕하세요");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/rust_8.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/rust_8.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     let hello = String::from("Hello");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hell`
[INFO] [stdout]   --> src/rust_8.rs:73:9
[INFO] [stdout]    |
[INFO] [stdout] 73 |     let hell = &hello[0..4];
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hell`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]   --> src/rust_8.rs:94:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |     let score = scores.get(&team_name).copied().unwrap_or(0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]   --> src/rust_9.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let greeting_file = greeting_file_result
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/part_12.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let x = *n1;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/part_12.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     *num_pointer = *num_pointer * 2;
[INFO] [stdout]    |     ^^^^^^^^^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stdout]   --> src/part_12.rs:55:1
[INFO] [stdout]    |
[INFO] [stdout] 55 | unsafe fn test(num_pointer: *mut u32){
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unsafe_op_in_unsafe_fn)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stdout]   --> src/part_12.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 |     *num_pointer = *num_pointer * 2;
[INFO] [stdout]    |                    ^^^^^^^^^^^^ dereference of raw pointer
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stdout]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add_one_v2`
[INFO] [stdout]   --> src/rust_13.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let add_one_v2 = |x: u32| -> u32 { x + 1 };
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/rust_15.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let d = MySmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/rust_16.rs:87:17
[INFO] [stdout]    |
[INFO] [stdout] 87 |             for i in 0..5 {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> src/rust_18_2.rs:34:27
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `metanit` is never used
[INFO] [stdout]   --> src/main.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn metanit () {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rust_book` is never used
[INFO] [stdout]   --> src/main.rs:99:4
[INFO] [stdout]    |
[INFO] [stdout] 99 | fn rust_book() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_start` is never used
[INFO] [stdout]  --> src/part_2.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_start() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_let_type` is never used
[INFO] [stdout]  --> src/part_2.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn f2_let_type() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_if_match` is never used
[INFO] [stdout]   --> src/part_2.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn f3_if_match() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_loops` is never used
[INFO] [stdout]   --> src/part_2.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn f4_loops() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_fn` is never used
[INFO] [stdout]   --> src/part_2.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub fn f5_fn() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_const` is never used
[INFO] [stdout]    --> src/part_2.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn f6_const() {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_fn2` is never used
[INFO] [stdout]    --> src/part_2.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub fn f7_fn2() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_tuple` is never used
[INFO] [stdout]  --> src/part_3.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_tuple() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_array` is never used
[INFO] [stdout]   --> src/part_3.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn f2_array() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_struct` is never used
[INFO] [stdout]   --> src/part_3.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | pub fn f3_struct() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_enum` is never used
[INFO] [stdout]   --> src/part_3.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f4_enum() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_owner` is never used
[INFO] [stdout]  --> src/part_4.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_owner() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_reference` is never used
[INFO] [stdout]   --> src/part_4.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn f2_reference() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_return_ref` is never used
[INFO] [stdout]   --> src/part_4.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn f3_return_ref() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_mut_reference` is never used
[INFO] [stdout]   --> src/part_4.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn f4_mut_reference() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_owner_2` is never used
[INFO] [stdout]   --> src/part_4.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 | pub fn f5_owner_2() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_owner_3` is never used
[INFO] [stdout]    --> src/part_4.rs:108:8
[INFO] [stdout]     |
[INFO] [stdout] 108 | pub fn f6_owner_3() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_impl` is never used
[INFO] [stdout]  --> src/part_5_1.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn f1_impl() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/part_5_1.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Person
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `display`, `change_age`, `is_older`, `say_hello`, and `create` are never used
[INFO] [stdout]   --> src/part_5_1.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl Person {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 27 |     fn display(&self){
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn change_age(&mut self, age: u8){
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn is_older(&self, other: &Person) -> bool{
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     fn say_hello(&self, other: &Person, hour: u8){
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn create(user_name: &str, user_age: u8) -> Self{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_trait` is never used
[INFO] [stdout]   --> src/part_5_1.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn f2_trait() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Printer` is never used
[INFO] [stdout]   --> src/part_5_1.rs:63:7
[INFO] [stdout]    |
[INFO] [stdout] 63 | trait Printer{
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Message` is never constructed
[INFO] [stdout]   --> src/part_5_1.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 | struct Message { text: String }
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_trait2` is never used
[INFO] [stdout]   --> src/part_5_1.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f3_trait2() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display` is never used
[INFO] [stdout]   --> src/part_5_1.rs:88:4
[INFO] [stdout]    |
[INFO] [stdout] 88 | fn display(printable: &impl Printer) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_generic` is never used
[INFO] [stdout]   --> src/part_5_1.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub fn f4_generic() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]    --> src/part_5_1.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 | struct User<T> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]    --> src/part_5_1.rs:109:8
[INFO] [stdout]     |
[INFO] [stdout] 109 | struct Point<T> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_overload` is never used
[INFO] [stdout]    --> src/part_5_1.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub fn f5_overload() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_type` is never used
[INFO] [stdout]  --> src/part_5_2.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f6_type() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Circle` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Circle { radius:f64 }
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Rectangle { width:f64, height:f64 }
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Shape` is never used
[INFO] [stdout]   --> src/part_5_2.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Shape{
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Area` is never used
[INFO] [stdout]   --> src/part_5_2.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 | trait Area {
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_area` is never used
[INFO] [stdout]   --> src/part_5_2.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn print_area(shape: &dyn Area) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_type_trait` is never used
[INFO] [stdout]   --> src/part_5_2.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn f7_type_trait() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `attack` is never used
[INFO] [stdout]   --> src/part_5_2.rs:60:4
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn attack<C: Character>() {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Character` is never used
[INFO] [stdout]   --> src/part_5_2.rs:66:7
[INFO] [stdout]    |
[INFO] [stdout] 66 | trait Character {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Weapon` is never used
[INFO] [stdout]   --> src/part_5_2.rs:73:7
[INFO] [stdout]    |
[INFO] [stdout] 73 | trait Weapon {
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Knight` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | struct Knight;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Mage` is never constructed
[INFO] [stdout]   --> src/part_5_2.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | struct Mage;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f8_debug` is never used
[INFO] [stdout]    --> src/part_5_2.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn f8_debug() {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]    --> src/part_5_2.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 | struct Person
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_alive` is never used
[INFO] [stdout]  --> src/part_6.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_alive() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message` is never used
[INFO] [stdout]   --> src/part_6.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn get_message() -> String { "hello".to_string() }
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message2` is never used
[INFO] [stdout]   --> src/part_6.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn get_message2<'a>() -> &'a str { "hello" }
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_alive_fn` is never used
[INFO] [stdout]   --> src/part_6.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub fn f2_alive_fn() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_name` is never used
[INFO] [stdout]   --> src/part_6.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn check_name(name: &str) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_name_2` is never used
[INFO] [stdout]   --> src/part_6.rs:51:4
[INFO] [stdout]    |
[INFO] [stdout] 51 | fn check_name_2<'a>(name: &'a str, default: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_str` is never used
[INFO] [stdout]   --> src/part_6.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn get_str() -> String {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_alive_struct` is never used
[INFO] [stdout]   --> src/part_6.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn f3_alive_struct() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]   --> src/part_6.rs:88:8
[INFO] [stdout]    |
[INFO] [stdout] 88 | struct Person<'a> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `print` and `say` are never used
[INFO] [stdout]   --> src/part_6.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | impl<'a> Person<'a>{
[INFO] [stdout]    | ------------------- methods in this implementation
[INFO] [stdout] 93 |     fn print(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn say<'b>(&self, text: &'b str) -> &'b str{
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_alive_static` is never used
[INFO] [stdout]    --> src/part_6.rs:106:8
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn f4_alive_static() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_message_static` is never used
[INFO] [stdout]    --> src/part_6.rs:120:4
[INFO] [stdout]     |
[INFO] [stdout] 120 | fn get_message_static() -> &'static str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_vec` is never used
[INFO] [stdout]  --> src/part_7.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn f1_vec() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_vec` is never used
[INFO] [stdout]   --> src/part_7.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn f2_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Phones` is never used
[INFO] [stdout]   --> src/part_7.rs:41:6
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum Phones {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_vec` is never used
[INFO] [stdout]   --> src/part_7.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn f3_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_string` is never used
[INFO] [stdout]   --> src/part_7.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn f4_string() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_string` is never used
[INFO] [stdout]   --> src/part_7.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 | pub fn f5_string() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_hashmap` is never used
[INFO] [stdout]    --> src/part_7.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub fn f6_hashmap() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_hashset` is never used
[INFO] [stdout]    --> src/part_7.rs:112:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | pub fn f7_hashset() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f8_iterator` is never used
[INFO] [stdout]    --> src/part_7.rs:134:8
[INFO] [stdout]     |
[INFO] [stdout] 134 | pub fn f8_iterator() {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PrimeGenerator` is never constructed
[INFO] [stdout]    --> src/part_7.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 | struct PrimeGenerator {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_prime` is never used
[INFO] [stdout]    --> src/part_7.rs:201:4
[INFO] [stdout]     |
[INFO] [stdout] 201 | fn is_prime(num: u32) -> bool {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Person` is never constructed
[INFO] [stdout]    --> src/part_7.rs:214:8
[INFO] [stdout]     |
[INFO] [stdout] 214 | struct Person{
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simple_game` is never used
[INFO] [stdout]  --> src/rust_2.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn simple_game () {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]  --> src/rust_3.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]  --> src/rust_4.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1() {
[INFO] [stdout]   |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1` is never used
[INFO] [stdout]   --> src/rust_7.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn f1() {
[INFO] [stdout]    |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_vec` is never used
[INFO] [stdout]  --> src/rust_8.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn f1_vec() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_vec` is never used
[INFO] [stdout]   --> src/rust_8.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn f2_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_vec` is never used
[INFO] [stdout]   --> src/rust_8.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn f3_vec() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_string` is never used
[INFO] [stdout]   --> src/rust_8.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn f4_string() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_hashmap` is never used
[INFO] [stdout]   --> src/rust_8.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f5_hashmap() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_hashmap` is never used
[INFO] [stdout]   --> src/rust_8.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub fn f6_hashmap() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_panic` is never used
[INFO] [stdout]  --> src/rust_9.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn f1_panic() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_result` is never used
[INFO] [stdout]   --> src/rust_9.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn f2_result() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greet_file` is never used
[INFO] [stdout]   --> src/rust_9.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn greet_file() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_1` is never used
[INFO] [stdout]   --> src/rust_9.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn read_username_from_file_1() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_2` is never used
[INFO] [stdout]   --> src/rust_9.rs:57:4
[INFO] [stdout]    |
[INFO] [stdout] 57 | fn read_username_from_file_2() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_3` is never used
[INFO] [stdout]   --> src/rust_9.rs:64:4
[INFO] [stdout]    |
[INFO] [stdout] 64 | fn read_username_from_file_3() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_4` is never used
[INFO] [stdout]   --> src/rust_9.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn read_username_from_file_4() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_generic` is never used
[INFO] [stdout]  --> src/rust_10.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn f1_generic() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/rust_10.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T> Point<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 14 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/rust_10.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct Point<T> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_lifetime` is never used
[INFO] [stdout]   --> src/rust_10.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn f2_lifetime() {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/rust_10.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]   --> src/rust_10.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn longest_with_an_announcement<'a, T>(
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/rust_11.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 18 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `squared_number` is never used
[INFO] [stdout]   --> src/rust_11.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn squared_number(x: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_input` is never used
[INFO] [stdout]  --> src/part_11.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn f1_input() -> io::Result<()> {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_unsafe` is never used
[INFO] [stdout]  --> src/part_12.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn f1_unsafe() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_ptr` is never used
[INFO] [stdout]   --> src/part_12.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn f2_ptr() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_fn` is never used
[INFO] [stdout]   --> src/part_12.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn f3_fn() {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test` is never used
[INFO] [stdout]   --> src/part_12.rs:55:11
[INFO] [stdout]    |
[INFO] [stdout] 55 | unsafe fn test(num_pointer: *mut u32){
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_fn_save` is never used
[INFO] [stdout]   --> src/part_12.rs:60:8
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub fn f3_fn_save() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_save` is never used
[INFO] [stdout]   --> src/part_12.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn test_save(num: &mut u32){
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `COUNTER` is never used
[INFO] [stdout]   --> src/part_12.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 | static COUNTER: u32 = 1;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `STATIC_VAL` is never used
[INFO] [stdout]   --> src/part_12.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 | static mut STATIC_VAL: u32 = 1;
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_static` is never used
[INFO] [stdout]   --> src/part_12.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub fn f5_static() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]    --> src/part_12.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn add(n: u32) {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f6_union` is never used
[INFO] [stdout]    --> src/part_12.rs:111:8
[INFO] [stdout]     |
[INFO] [stdout] 111 | pub fn f6_union() {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: union `Symbol` is never used
[INFO] [stdout]    --> src/part_12.rs:123:7
[INFO] [stdout]     |
[INFO] [stdout] 123 | union Symbol {
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f7_box` is never used
[INFO] [stdout]    --> src/part_12.rs:133:8
[INFO] [stdout]     |
[INFO] [stdout] 133 | pub fn f7_box() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f8_box` is never used
[INFO] [stdout]    --> src/part_12.rs:145:8
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub fn f8_box() {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]    --> src/part_12.rs:182:8
[INFO] [stdout]     |
[INFO] [stdout] 182 | struct Point{ x: u64, y: u64 }
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]    --> src/part_12.rs:185:6
[INFO] [stdout]     |
[INFO] [stdout] 185 | enum List {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f9_rc` is never used
[INFO] [stdout]    --> src/part_12.rs:196:8
[INFO] [stdout]     |
[INFO] [stdout] 196 | pub fn f9_rc() {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_closure` is never used
[INFO] [stdout]  --> src/rust_13.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn f1_closure() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `giveaway` and `most_stocked` are never used
[INFO] [stdout]   --> src/rust_13.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 34 |     impl Inventory {
[INFO] [stdout]    |     -------------- methods in this implementation
[INFO] [stdout] 35 |         fn giveaway(&self, user_preference: Option<ShirtColor>) -> ShirtColor {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |         fn most_stocked(&self) -> ShirtColor {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_closure` is never used
[INFO] [stdout]   --> src/rust_13.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | pub fn f2_closure() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_closure` is never used
[INFO] [stdout]   --> src/rust_13.rs:84:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub fn f3_closure() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_iter` is never used
[INFO] [stdout]    --> src/rust_13.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | pub fn f4_iter() {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_box` is never used
[INFO] [stdout]   --> src/rust_15.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn f1_box() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyBox` is never constructed
[INFO] [stdout]   --> src/rust_15.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct MyBox<T>(T);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/rust_15.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl<T> MyBox<T> {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 32 |     fn new(x: T) -> MyBox<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_box` is never used
[INFO] [stdout]   --> src/rust_15.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub fn f2_box() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MySmartPointer` is never constructed
[INFO] [stdout]   --> src/rust_15.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct MySmartPointer {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_ref` is never used
[INFO] [stdout]   --> src/rust_15.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | pub fn f3_ref() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List1` is never used
[INFO] [stdout]   --> src/rust_15.rs:89:6
[INFO] [stdout]    |
[INFO] [stdout] 89 | enum List1 {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f4_ref_cycle` is never used
[INFO] [stdout]   --> src/rust_15.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub fn f4_ref_cycle() {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List2` is never used
[INFO] [stdout]    --> src/rust_15.rs:122:6
[INFO] [stdout]     |
[INFO] [stdout] 122 | enum List2 {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tail` is never used
[INFO] [stdout]    --> src/rust_15.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 126 | impl List2 {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] 127 |     fn tail(&self) -> Option<&RefCell<Rc<List2>>> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f5_ref_cycle` is never used
[INFO] [stdout]    --> src/rust_15.rs:139:8
[INFO] [stdout]     |
[INFO] [stdout] 139 | pub fn f5_ref_cycle() {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]    --> src/rust_15.rs:185:8
[INFO] [stdout]     |
[INFO] [stdout] 185 | struct Node {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_thread` is never used
[INFO] [stdout]  --> src/rust_16.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn f1_thread() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_thread_channel` is never used
[INFO] [stdout]   --> src/rust_16.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn f2_thread_channel() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_thread_mutex` is never used
[INFO] [stdout]   --> src/rust_16.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub fn f3_thread_mutex() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Draw` is never used
[INFO] [stdout]  --> src/rust_18_1.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Draw {
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Screen` is never constructed
[INFO] [stdout]  --> src/rust_18_1.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Screen {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/rust_18_1.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Screen {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 10 |     pub fn run(&self) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Button` is never constructed
[INFO] [stdout]   --> src/rust_18_1.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub struct Button {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SelectBox` is never constructed
[INFO] [stdout]   --> src/rust_18_1.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct SelectBox {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f1_run` is never used
[INFO] [stdout]   --> src/rust_18_1.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn f1_run() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]  --> src/rust_18_2.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Post {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_text`, `content`, `request_review`, and `approve` are never used
[INFO] [stdout]   --> src/rust_18_2.rs:7:12
[INFO] [stdout]    |
[INFO] [stdout] 6  | impl Post {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 7  |     pub fn new() -> Post {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn content(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn request_review(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     pub fn approve(&mut self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `State` is never used
[INFO] [stdout]   --> src/rust_18_2.rs:31:7
[INFO] [stdout]    |
[INFO] [stdout] 31 | trait State {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]   --> src/rust_18_2.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Draft {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PendingReview` is never constructed
[INFO] [stdout]   --> src/rust_18_2.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct PendingReview {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Published` is never constructed
[INFO] [stdout]   --> src/rust_18_2.rs:59:8
[INFO] [stdout]    |
[INFO] [stdout] 59 | struct Published {}
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f2_run` is never used
[INFO] [stdout]   --> src/rust_18_2.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | pub fn f2_run() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]  --> src/rust_18_3.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Post {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DraftPost` is never constructed
[INFO] [stdout]  --> src/rust_18_3.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct DraftPost {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PendingReviewPost` is never constructed
[INFO] [stdout]  --> src/rust_18_3.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct PendingReviewPost {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `content` are never used
[INFO] [stdout]   --> src/rust_18_3.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Post {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new() -> DraftPost {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn content(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_text` and `request_review` are never used
[INFO] [stdout]   --> src/rust_18_3.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl DraftPost {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 27 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn request_review(self) -> PendingReviewPost {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `approve` is never used
[INFO] [stdout]   --> src/rust_18_3.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl PendingReviewPost {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 38 |     pub fn approve(self) -> Option<Post> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `f3_run` is never used
[INFO] [stdout]   --> src/rust_18_3.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub fn f3_run() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `handle_connection1` is never used
[INFO] [stdout]   --> src/rust_20_web_server.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn handle_connection1(mut stream: TcpStream) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0133`.
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "25db4158165a94d4b51bdcdd130002f5a2f41d2a70fd4f9174e838901e5795cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25db4158165a94d4b51bdcdd130002f5a2f41d2a70fd4f9174e838901e5795cd", kill_on_drop: false }`
[INFO] [stdout] 25db4158165a94d4b51bdcdd130002f5a2f41d2a70fd4f9174e838901e5795cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Copt-level=3" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d98a5da813da67eb189387b8ccfb73cf481275d8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 99a9be04604c202b63372c14fb2411bb6eed24657db98f816861807f6a080ae0
[INFO] running `Command { std: "docker" "start" "-a" "99a9be04604c202b63372c14fb2411bb6eed24657db98f816861807f6a080ae0", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `clone` and `cmp::Ordering`
[INFO] [stderr]  --> src/rust_7.rs:3:11
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::{cmp::Ordering, clone};
[INFO] [stderr]   |           ^^^^^^^^^^^^^  ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Write` and `self`
[INFO] [stderr]  --> src/rust_7.rs:7:15
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{self, Write};
[INFO] [stderr]   |               ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::*`
[INFO] [stderr]   --> src/rust_7.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::collections::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::INFINITY`
[INFO] [stderr]  --> src/rust_9.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::f64::INFINITY;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::NonZeroI32`
[INFO] [stderr]   --> src/rust_11.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     use std::num::NonZeroI32;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::ops::Div`
[INFO] [stderr]   --> src/rust_11.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     use std::ops::Div;
[INFO] [stderr]    |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/part_2.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let b: i8 = 127;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/part_2.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let b: i32 = 1_000_000_000;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/part_2.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let b: isize = 1;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/part_2.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let b = 1_456_i16;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/part_2.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |     let f: f32 = 2.0004;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/part_2.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let b: bool = false;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num1`
[INFO] [stderr]   --> src/part_2.rs:90:9
[INFO] [stderr]    |
[INFO] [stderr] 90 |     let num1 = sum1(5, 2);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num3`
[INFO] [stderr]   --> src/part_2.rs:92:9
[INFO] [stderr]    |
[INFO] [stderr] 92 |     let num3 = sum3(5, 2);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_num3`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `season` is never read
[INFO] [stderr]   --> src/part_3.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 |     let mut season = Season::Spring;
[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: unused variable: `res`
[INFO] [stderr]   --> src/part_4.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let res = create_let();
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `is_older`
[INFO] [stderr]   --> src/part_5_1.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let is_older = tom.is_older(&bob);
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_older`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sam`
[INFO] [stderr]   --> src/part_5_1.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let sam = Person::create("Sam", 12);
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sam`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `message`
[INFO] [stderr]   --> src/part_7.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |     let message = String::new();
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `message`
[INFO] [stderr]   --> src/part_7.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let message = String::from("Hello");
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `people`
[INFO] [stderr]    --> src/part_7.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 |     let mut people = vec![
[INFO] [stderr]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_people`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/part_7.rs:141:9
[INFO] [stderr]     |
[INFO] [stderr] 141 |     let mut people = vec![
[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: variable does not need to be mutable
[INFO] [stderr]  --> src/rust_4.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let mut s = String::from("hello");
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `secret_number`
[INFO] [stderr]   --> src/rust_7.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let secret_number = rand::rng().random_range(1..=100);
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_secret_number`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rust_8.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut v = vec![1, 2, 3, 4, 5];
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `row`
[INFO] [stderr]   --> src/rust_8.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     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/rust_8.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let s = String::new();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/rust_8.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let s = String::from("text");
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/rust_8.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let s = "text".to_string();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]   --> src/rust_8.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |     let hello = String::from("안녕하세요");
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]   --> src/rust_8.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |     let hello = String::from("你好");
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]   --> src/rust_8.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |     let hello = String::from("Hello");
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hell`
[INFO] [stderr]   --> src/rust_8.rs:73:9
[INFO] [stderr]    |
[INFO] [stderr] 73 |     let hell = &hello[0..4];
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_hell`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `score`
[INFO] [stderr]   --> src/rust_8.rs:94:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |     let score = scores.get(&team_name).copied().unwrap_or(0);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_score`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `greeting_file`
[INFO] [stderr]   --> src/rust_9.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let greeting_file = greeting_file_result
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/part_12.rs:11:13
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let x = *n1;
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stderr]   --> src/part_12.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     *num_pointer = *num_pointer * 2;
[INFO] [stderr]    |     ^^^^^^^^^^^^ dereference of raw pointer
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stderr]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stderr] note: an unsafe function restricts its caller, but its body is safe by default
[INFO] [stderr]   --> src/part_12.rs:55:1
[INFO] [stderr]    |
[INFO] [stderr] 55 | unsafe fn test(num_pointer: *mut u32){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: `#[warn(unsafe_op_in_unsafe_fn)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning[E0133]: dereference of raw pointer is unsafe and requires unsafe block
[INFO] [stderr]   --> src/part_12.rs:56:20
[INFO] [stderr]    |
[INFO] [stderr] 56 |     *num_pointer = *num_pointer * 2;
[INFO] [stderr]    |                    ^^^^^^^^^^^^ dereference of raw pointer
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2024/unsafe-op-in-unsafe-fn.html>
[INFO] [stderr]    = note: raw pointers may be null, dangling or unaligned; they can violate aliasing rules and cause data races: all of these are undefined behavior
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `add_one_v2`
[INFO] [stderr]   --> src/rust_13.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |     let add_one_v2 = |x: u32| -> u32 { x + 1 };
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_add_one_v2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/rust_15.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let d = MySmartPointer {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/rust_16.rs:87:17
[INFO] [stderr]    |
[INFO] [stderr] 87 |             for i in 0..5 {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]   --> src/rust_18_2.rs:34:27
[INFO] [stderr]    |
[INFO] [stderr] 34 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr] 
[INFO] [stderr] warning: function `metanit` is never used
[INFO] [stderr]   --> src/main.rs:39:4
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn metanit () {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `rust_book` is never used
[INFO] [stderr]   --> src/main.rs:99:4
[INFO] [stderr]    |
[INFO] [stderr] 99 | fn rust_book() {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_start` is never used
[INFO] [stderr]  --> src/part_2.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f1_start() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_let_type` is never used
[INFO] [stderr]  --> src/part_2.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn f2_let_type() {
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_if_match` is never used
[INFO] [stderr]   --> src/part_2.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | pub fn f3_if_match() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_loops` is never used
[INFO] [stderr]   --> src/part_2.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 51 | pub fn f4_loops() {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f5_fn` is never used
[INFO] [stderr]   --> src/part_2.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 | pub fn f5_fn() {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f6_const` is never used
[INFO] [stderr]    --> src/part_2.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr] 100 | pub fn f6_const() {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f7_fn2` is never used
[INFO] [stderr]    --> src/part_2.rs:105:8
[INFO] [stderr]     |
[INFO] [stderr] 105 | pub fn f7_fn2() {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_tuple` is never used
[INFO] [stderr]  --> src/part_3.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f1_tuple() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_array` is never used
[INFO] [stderr]   --> src/part_3.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub fn f2_array() {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_struct` is never used
[INFO] [stderr]   --> src/part_3.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 | pub fn f3_struct() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_enum` is never used
[INFO] [stderr]   --> src/part_3.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn f4_enum() {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_owner` is never used
[INFO] [stderr]  --> src/part_4.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f1_owner() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_reference` is never used
[INFO] [stderr]   --> src/part_4.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn f2_reference() {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_return_ref` is never used
[INFO] [stderr]   --> src/part_4.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn f3_return_ref() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_mut_reference` is never used
[INFO] [stderr]   --> src/part_4.rs:48:8
[INFO] [stderr]    |
[INFO] [stderr] 48 | pub fn f4_mut_reference() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f5_owner_2` is never used
[INFO] [stderr]   --> src/part_4.rs:82:8
[INFO] [stderr]    |
[INFO] [stderr] 82 | pub fn f5_owner_2() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f6_owner_3` is never used
[INFO] [stderr]    --> src/part_4.rs:108:8
[INFO] [stderr]     |
[INFO] [stderr] 108 | pub fn f6_owner_3() {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_impl` is never used
[INFO] [stderr]  --> src/part_5_1.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn f1_impl() {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]   --> src/part_5_1.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 | struct Person
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `display`, `change_age`, `is_older`, `say_hello`, and `create` are never used
[INFO] [stderr]   --> src/part_5_1.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 26 | impl Person {
[INFO] [stderr]    | ----------- associated items in this implementation
[INFO] [stderr] 27 |     fn display(&self){
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 31 |     fn change_age(&mut self, age: u8){
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 35 |     fn is_older(&self, other: &Person) -> bool{
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 |     fn say_hello(&self, other: &Person, hour: u8){
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 48 |     fn create(user_name: &str, user_age: u8) -> Self{
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_trait` is never used
[INFO] [stderr]   --> src/part_5_1.rs:58:8
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn f2_trait() {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Printer` is never used
[INFO] [stderr]   --> src/part_5_1.rs:63:7
[INFO] [stderr]    |
[INFO] [stderr] 63 | trait Printer{
[INFO] [stderr]    |       ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Message` is never constructed
[INFO] [stderr]   --> src/part_5_1.rs:75:8
[INFO] [stderr]    |
[INFO] [stderr] 75 | struct Message { text: String }
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_trait2` is never used
[INFO] [stderr]   --> src/part_5_1.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn f3_trait2() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `display` is never used
[INFO] [stderr]   --> src/part_5_1.rs:88:4
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn display(printable: &impl Printer) {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_generic` is never used
[INFO] [stderr]   --> src/part_5_1.rs:94:8
[INFO] [stderr]    |
[INFO] [stderr] 94 | pub fn f4_generic() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `User` is never constructed
[INFO] [stderr]    --> src/part_5_1.rs:105:8
[INFO] [stderr]     |
[INFO] [stderr] 105 | struct User<T> {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]    --> src/part_5_1.rs:109:8
[INFO] [stderr]     |
[INFO] [stderr] 109 | struct Point<T> {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f5_overload` is never used
[INFO] [stderr]    --> src/part_5_1.rs:116:8
[INFO] [stderr]     |
[INFO] [stderr] 116 | pub fn f5_overload() {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f6_type` is never used
[INFO] [stderr]  --> src/part_5_2.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f6_type() {
[INFO] [stderr]   |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Circle` is never constructed
[INFO] [stderr]   --> src/part_5_2.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | struct Circle { radius:f64 }
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rectangle` is never constructed
[INFO] [stderr]   --> src/part_5_2.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct Rectangle { width:f64, height:f64 }
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Shape` is never used
[INFO] [stderr]   --> src/part_5_2.rs:19:7
[INFO] [stderr]    |
[INFO] [stderr] 19 | trait Shape{
[INFO] [stderr]    |       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Area` is never used
[INFO] [stderr]   --> src/part_5_2.rs:32:7
[INFO] [stderr]    |
[INFO] [stderr] 32 | trait Area {
[INFO] [stderr]    |       ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `print_area` is never used
[INFO] [stderr]   --> src/part_5_2.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn print_area(shape: &dyn Area) {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f7_type_trait` is never used
[INFO] [stderr]   --> src/part_5_2.rs:54:8
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn f7_type_trait() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `attack` is never used
[INFO] [stderr]   --> src/part_5_2.rs:60:4
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn attack<C: Character>() {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Character` is never used
[INFO] [stderr]   --> src/part_5_2.rs:66:7
[INFO] [stderr]    |
[INFO] [stderr] 66 | trait Character {
[INFO] [stderr]    |       ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Weapon` is never used
[INFO] [stderr]   --> src/part_5_2.rs:73:7
[INFO] [stderr]    |
[INFO] [stderr] 73 | trait Weapon {
[INFO] [stderr]    |       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Knight` is never constructed
[INFO] [stderr]   --> src/part_5_2.rs:77:8
[INFO] [stderr]    |
[INFO] [stderr] 77 | struct Knight;
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Mage` is never constructed
[INFO] [stderr]   --> src/part_5_2.rs:78:8
[INFO] [stderr]    |
[INFO] [stderr] 78 | struct Mage;
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f8_debug` is never used
[INFO] [stderr]    --> src/part_5_2.rs:112:8
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn f8_debug() {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]    --> src/part_5_2.rs:119:8
[INFO] [stderr]     |
[INFO] [stderr] 119 | struct Person
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_alive` is never used
[INFO] [stderr]  --> src/part_6.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f1_alive() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_message` is never used
[INFO] [stderr]   --> src/part_6.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn get_message() -> String { "hello".to_string() }
[INFO] [stderr]    |    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_message2` is never used
[INFO] [stderr]   --> src/part_6.rs:17:4
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn get_message2<'a>() -> &'a str { "hello" }
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_alive_fn` is never used
[INFO] [stderr]   --> src/part_6.rs:22:8
[INFO] [stderr]    |
[INFO] [stderr] 22 | pub fn f2_alive_fn() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `check_name` is never used
[INFO] [stderr]   --> src/part_6.rs:46:4
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn check_name(name: &str) -> &str {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `check_name_2` is never used
[INFO] [stderr]   --> src/part_6.rs:51:4
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn check_name_2<'a>(name: &'a str, default: &'a str) -> &'a str {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_str` is never used
[INFO] [stderr]   --> src/part_6.rs:56:4
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn get_str() -> String {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_alive_struct` is never used
[INFO] [stderr]   --> src/part_6.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn f3_alive_struct() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]   --> src/part_6.rs:88:8
[INFO] [stderr]    |
[INFO] [stderr] 88 | struct Person<'a> {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `print` and `say` are never used
[INFO] [stderr]   --> src/part_6.rs:93:8
[INFO] [stderr]    |
[INFO] [stderr] 92 | impl<'a> Person<'a>{
[INFO] [stderr]    | ------------------- methods in this implementation
[INFO] [stderr] 93 |     fn print(&self) {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 97 |     fn say<'b>(&self, text: &'b str) -> &'b str{
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_alive_static` is never used
[INFO] [stderr]    --> src/part_6.rs:106:8
[INFO] [stderr]     |
[INFO] [stderr] 106 | pub fn f4_alive_static() {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_message_static` is never used
[INFO] [stderr]    --> src/part_6.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn get_message_static() -> &'static str {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_vec` is never used
[INFO] [stderr]  --> src/part_7.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn f1_vec() {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_vec` is never used
[INFO] [stderr]   --> src/part_7.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn f2_vec() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Phones` is never used
[INFO] [stderr]   --> src/part_7.rs:41:6
[INFO] [stderr]    |
[INFO] [stderr] 41 | enum Phones {
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_vec` is never used
[INFO] [stderr]   --> src/part_7.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn f3_vec() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_string` is never used
[INFO] [stderr]   --> src/part_7.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn f4_string() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f5_string` is never used
[INFO] [stderr]   --> src/part_7.rs:78:8
[INFO] [stderr]    |
[INFO] [stderr] 78 | pub fn f5_string() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f6_hashmap` is never used
[INFO] [stderr]    --> src/part_7.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr] 100 | pub fn f6_hashmap() {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f7_hashset` is never used
[INFO] [stderr]    --> src/part_7.rs:112:8
[INFO] [stderr]     |
[INFO] [stderr] 112 | pub fn f7_hashset() {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f8_iterator` is never used
[INFO] [stderr]    --> src/part_7.rs:134:8
[INFO] [stderr]     |
[INFO] [stderr] 134 | pub fn f8_iterator() {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `PrimeGenerator` is never constructed
[INFO] [stderr]    --> src/part_7.rs:187:8
[INFO] [stderr]     |
[INFO] [stderr] 187 | struct PrimeGenerator {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `is_prime` is never used
[INFO] [stderr]    --> src/part_7.rs:201:4
[INFO] [stderr]     |
[INFO] [stderr] 201 | fn is_prime(num: u32) -> bool {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Person` is never constructed
[INFO] [stderr]    --> src/part_7.rs:214:8
[INFO] [stderr]     |
[INFO] [stderr] 214 | struct Person{
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `simple_game` is never used
[INFO] [stderr]  --> src/rust_2.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn simple_game () {
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1` is never used
[INFO] [stderr]  --> src/rust_3.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f1() {
[INFO] [stderr]   |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1` is never used
[INFO] [stderr]  --> src/rust_4.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f1() {
[INFO] [stderr]   |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1` is never used
[INFO] [stderr]   --> src/rust_7.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn f1() {
[INFO] [stderr]    |        ^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_vec` is never used
[INFO] [stderr]  --> src/rust_8.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn f1_vec() {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_vec` is never used
[INFO] [stderr]   --> src/rust_8.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn f2_vec() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_vec` is never used
[INFO] [stderr]   --> src/rust_8.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn f3_vec() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_string` is never used
[INFO] [stderr]   --> src/rust_8.rs:58:8
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub fn f4_string() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f5_hashmap` is never used
[INFO] [stderr]   --> src/rust_8.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn f5_hashmap() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f6_hashmap` is never used
[INFO] [stderr]   --> src/rust_8.rs:97:8
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub fn f6_hashmap() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_panic` is never used
[INFO] [stderr]  --> src/rust_9.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn f1_panic() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_result` is never used
[INFO] [stderr]   --> src/rust_9.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn f2_result() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `greet_file` is never used
[INFO] [stderr]   --> src/rust_9.rs:26:4
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn greet_file() {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_username_from_file_1` is never used
[INFO] [stderr]   --> src/rust_9.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn read_username_from_file_1() -> Result<String, io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_username_from_file_2` is never used
[INFO] [stderr]   --> src/rust_9.rs:57:4
[INFO] [stderr]    |
[INFO] [stderr] 57 | fn read_username_from_file_2() -> Result<String, io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_username_from_file_3` is never used
[INFO] [stderr]   --> src/rust_9.rs:64:4
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn read_username_from_file_3() -> Result<String, io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `read_username_from_file_4` is never used
[INFO] [stderr]   --> src/rust_9.rs:70:4
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn read_username_from_file_4() -> Result<String, io::Error> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_generic` is never used
[INFO] [stderr]  --> src/rust_10.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn f1_generic() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `x` is never used
[INFO] [stderr]   --> src/rust_10.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl<T> Point<T> {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] 14 |     fn x(&self) -> &T {
[INFO] [stderr]    |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]   --> src/rust_10.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | struct Point<T> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_lifetime` is never used
[INFO] [stderr]   --> src/rust_10.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn f2_lifetime() {
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest` is never used
[INFO] [stderr]   --> src/rust_10.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `longest_with_an_announcement` is never used
[INFO] [stderr]   --> src/rust_10.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn longest_with_an_announcement<'a, T>(
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `value` is never read
[INFO] [stderr]   --> src/rust_11.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Guess {
[INFO] [stderr]    |            ----- field in this struct
[INFO] [stderr] 18 |     value: i32,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `squared_number` is never used
[INFO] [stderr]   --> src/rust_11.rs:72:8
[INFO] [stderr]    |
[INFO] [stderr] 72 | pub fn squared_number(x: u32) -> u32 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_input` is never used
[INFO] [stderr]  --> src/part_11.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn f1_input() -> io::Result<()> {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_unsafe` is never used
[INFO] [stderr]  --> src/part_12.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn f1_unsafe() {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_ptr` is never used
[INFO] [stderr]   --> src/part_12.rs:28:8
[INFO] [stderr]    |
[INFO] [stderr] 28 | pub fn f2_ptr() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_fn` is never used
[INFO] [stderr]   --> src/part_12.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn f3_fn() {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test` is never used
[INFO] [stderr]   --> src/part_12.rs:55:11
[INFO] [stderr]    |
[INFO] [stderr] 55 | unsafe fn test(num_pointer: *mut u32){
[INFO] [stderr]    |           ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_fn_save` is never used
[INFO] [stderr]   --> src/part_12.rs:60:8
[INFO] [stderr]    |
[INFO] [stderr] 60 | pub fn f3_fn_save() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_save` is never used
[INFO] [stderr]   --> src/part_12.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn test_save(num: &mut u32){
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static `COUNTER` is never used
[INFO] [stderr]   --> src/part_12.rs:87:8
[INFO] [stderr]    |
[INFO] [stderr] 87 | static COUNTER: u32 = 1;
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static `STATIC_VAL` is never used
[INFO] [stderr]   --> src/part_12.rs:88:12
[INFO] [stderr]    |
[INFO] [stderr] 88 | static mut STATIC_VAL: u32 = 1;
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f5_static` is never used
[INFO] [stderr]   --> src/part_12.rs:90:8
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub fn f5_static() {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add` is never used
[INFO] [stderr]    --> src/part_12.rs:101:4
[INFO] [stderr]     |
[INFO] [stderr] 101 | fn add(n: u32) {
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f6_union` is never used
[INFO] [stderr]    --> src/part_12.rs:111:8
[INFO] [stderr]     |
[INFO] [stderr] 111 | pub fn f6_union() {
[INFO] [stderr]     |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: union `Symbol` is never used
[INFO] [stderr]    --> src/part_12.rs:123:7
[INFO] [stderr]     |
[INFO] [stderr] 123 | union Symbol {
[INFO] [stderr]     |       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f7_box` is never used
[INFO] [stderr]    --> src/part_12.rs:133:8
[INFO] [stderr]     |
[INFO] [stderr] 133 | pub fn f7_box() {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f8_box` is never used
[INFO] [stderr]    --> src/part_12.rs:145:8
[INFO] [stderr]     |
[INFO] [stderr] 145 | pub fn f8_box() {
[INFO] [stderr]     |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]    --> src/part_12.rs:182:8
[INFO] [stderr]     |
[INFO] [stderr] 182 | struct Point{ x: u64, y: u64 }
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List` is never used
[INFO] [stderr]    --> src/part_12.rs:185:6
[INFO] [stderr]     |
[INFO] [stderr] 185 | enum List {
[INFO] [stderr]     |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f9_rc` is never used
[INFO] [stderr]    --> src/part_12.rs:196:8
[INFO] [stderr]     |
[INFO] [stderr] 196 | pub fn f9_rc() {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_closure` is never used
[INFO] [stderr]  --> src/rust_13.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn f1_closure() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `giveaway` and `most_stocked` are never used
[INFO] [stderr]   --> src/rust_13.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 34 |     impl Inventory {
[INFO] [stderr]    |     -------------- methods in this implementation
[INFO] [stderr] 35 |         fn giveaway(&self, user_preference: Option<ShirtColor>) -> ShirtColor {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 39 |         fn most_stocked(&self) -> ShirtColor {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_closure` is never used
[INFO] [stderr]   --> src/rust_13.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn f2_closure() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_closure` is never used
[INFO] [stderr]   --> src/rust_13.rs:84:8
[INFO] [stderr]    |
[INFO] [stderr] 84 | pub fn f3_closure() {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_iter` is never used
[INFO] [stderr]    --> src/rust_13.rs:127:8
[INFO] [stderr]     |
[INFO] [stderr] 127 | pub fn f4_iter() {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_box` is never used
[INFO] [stderr]   --> src/rust_15.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn f1_box() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `MyBox` is never constructed
[INFO] [stderr]   --> src/rust_15.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | struct MyBox<T>(T);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/rust_15.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 31 | impl<T> MyBox<T> {
[INFO] [stderr]    | ---------------- associated function in this implementation
[INFO] [stderr] 32 |     fn new(x: T) -> MyBox<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_box` is never used
[INFO] [stderr]   --> src/rust_15.rs:46:8
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub fn f2_box() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `MySmartPointer` is never constructed
[INFO] [stderr]   --> src/rust_15.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | struct MySmartPointer {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_ref` is never used
[INFO] [stderr]   --> src/rust_15.rs:73:8
[INFO] [stderr]    |
[INFO] [stderr] 73 | pub fn f3_ref() {
[INFO] [stdout] 
[INFO] [stderr]    |        ^^^^^^
[INFO] [stdout] running 3 tests
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List1` is never used
[INFO] [stderr]   --> src/rust_15.rs:89:6
[INFO] [stderr]    |
[INFO] [stderr] 89 | enum List1 {
[INFO] [stderr]    |      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f4_ref_cycle` is never used
[INFO] [stderr]   --> src/rust_15.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 98 | pub fn f4_ref_cycle() {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `List2` is never used
[INFO] [stderr]    --> src/rust_15.rs:122:6
[INFO] [stderr]     |
[INFO] [stderr] 122 | enum List2 {
[INFO] [stderr]     |      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `tail` is never used
[INFO] [stderr]    --> src/rust_15.rs:127:8
[INFO] [stderr]     |
[INFO] [stderr] 126 | impl List2 {
[INFO] [stderr]     | ---------- method in this implementation
[INFO] [stderr] 127 |     fn tail(&self) -> Option<&RefCell<Rc<List2>>> {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f5_ref_cycle` is never used
[INFO] [stderr]    --> src/rust_15.rs:139:8
[INFO] [stderr]     |
[INFO] [stderr] 139 | pub fn f5_ref_cycle() {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]    --> src/rust_15.rs:185:8
[INFO] [stderr]     |
[INFO] [stderr] 185 | struct Node {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_thread` is never used
[INFO] [stderr]  --> src/rust_16.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn f1_thread() {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_thread_channel` is never used
[INFO] [stderr]   --> src/rust_16.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn f2_thread_channel() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_thread_mutex` is never used
[INFO] [stderr]   --> src/rust_16.rs:80:8
[INFO] [stderr]    |
[INFO] [stderr] 80 | pub fn f3_thread_mutex() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Draw` is never used
[INFO] [stderr]  --> src/rust_18_1.rs:1:11
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub trait Draw {
[INFO] [stderr]   |           ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Screen` is never constructed
[INFO] [stderr]  --> src/rust_18_1.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Screen {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `run` is never used
[INFO] [stderr]   --> src/rust_18_1.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 9  | impl Screen {
[INFO] [stderr]    | ----------- method in this implementation
[INFO] [stderr] 10 |     pub fn run(&self) {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Button` is never constructed
[INFO] [stderr]   --> src/rust_18_1.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct Button {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `SelectBox` is never constructed
[INFO] [stderr]   --> src/rust_18_1.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 | struct SelectBox {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f1_run` is never used
[INFO] [stderr]   --> src/rust_18_1.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn f1_run() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Post` is never constructed
[INFO] [stderr]  --> src/rust_18_2.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Post {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `add_text`, `content`, `request_review`, and `approve` are never used
[INFO] [stderr]   --> src/rust_18_2.rs:7:12
[INFO] [stderr]    |
[INFO] [stderr] 6  | impl Post {
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 7  |     pub fn new() -> Post {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 13 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 16 |     pub fn content(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 19 |     pub fn request_review(&mut self) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 |     pub fn approve(&mut self) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `State` is never used
[INFO] [stderr]   --> src/rust_18_2.rs:31:7
[INFO] [stderr]    |
[INFO] [stderr] 31 | trait State {
[INFO] [stderr]    |       ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Draft` is never constructed
[INFO] [stderr]   --> src/rust_18_2.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | struct Draft {}
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `PendingReview` is never constructed
[INFO] [stderr]   --> src/rust_18_2.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | struct PendingReview {}
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Published` is never constructed
[INFO] [stderr]   --> src/rust_18_2.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | struct Published {}
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f2_run` is never used
[INFO] [stderr]   --> src/rust_18_2.rs:76:8
[INFO] [stderr]    |
[INFO] [stderr] 76 | pub fn f2_run() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Post` is never constructed
[INFO] [stderr]  --> src/rust_18_3.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct Post {
[INFO] [stderr]   |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `DraftPost` is never constructed
[INFO] [stderr]  --> src/rust_18_3.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct DraftPost {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `PendingReviewPost` is never constructed
[INFO] [stderr]  --> src/rust_18_3.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub struct PendingReviewPost {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `content` are never used
[INFO] [stderr]   --> src/rust_18_3.rs:15:12
[INFO] [stderr]    |
[INFO] [stderr] 14 | impl Post {
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 15 |     pub fn new() -> DraftPost {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 21 |     pub fn content(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `add_text` and `request_review` are never used
[INFO] [stderr]   --> src/rust_18_3.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 26 | impl DraftPost {
[INFO] [stderr]    | -------------- methods in this implementation
[INFO] [stderr] 27 |     pub fn add_text(&mut self, text: &str) {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 30 |     pub fn request_review(self) -> PendingReviewPost {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `approve` is never used
[INFO] [stderr]   --> src/rust_18_3.rs:38:12
[INFO] [stderr]    |
[INFO] [stderr] 37 | impl PendingReviewPost {
[INFO] [stderr]    | ---------------------- method in this implementation
[INFO] [stderr] 38 |     pub fn approve(self) -> Option<Post> {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `f3_run` is never used
[INFO] [stderr]   --> src/rust_18_3.rs:50:8
[INFO] [stderr]    |
[INFO] [stderr] 50 | pub fn f3_run() {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `handle_connection1` is never used
[INFO] [stderr]   --> src/rust_20_web_server.rs:50:4
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn handle_connection1(mut stream: TcpStream) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0133`.
[INFO] [stderr] warning: `rust-learning` (bin "rust-learning" test) generated 195 warnings (run `cargo fix --bin "rust-learning" --tests` to apply 10 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_learning-e669f2a6d2265ae9)
[INFO] [stdout] test rust_11::tests::exploration ... ok
[INFO] [stdout] test rust_11::tests::larger_can_hold_smaller ... ok
[INFO] [stdout] test rust_11::tests::greater_than_100 - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "99a9be04604c202b63372c14fb2411bb6eed24657db98f816861807f6a080ae0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99a9be04604c202b63372c14fb2411bb6eed24657db98f816861807f6a080ae0", kill_on_drop: false }`
[INFO] [stdout] 99a9be04604c202b63372c14fb2411bb6eed24657db98f816861807f6a080ae0
