[INFO] cloning repository https://github.com/htoopyaelinn56/rust_book_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/htoopyaelinn56/rust_book_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Frust_book_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Frust_book_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 61e0bff5d8f9949cea46e9b27168fc6c95b9be2a
[INFO] checking htoopyaelinn56/rust_book_practice against master#75530e9f72a1990ed2305e16fd51d02f47048f12 for pr-138676
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhtoopyaelinn56%2Frust_book_practice" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/htoopyaelinn56/rust_book_practice on toolchain 75530e9f72a1990ed2305e16fd51d02f47048f12
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+75530e9f72a1990ed2305e16fd51d02f47048f12" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/htoopyaelinn56/rust_book_practice
[INFO] finished tweaking git repo https://github.com/htoopyaelinn56/rust_book_practice
[INFO] tweaked toml for git repo https://github.com/htoopyaelinn56/rust_book_practice written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/htoopyaelinn56/rust_book_practice 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" "+75530e9f72a1990ed2305e16fd51d02f47048f12" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+75530e9f72a1990ed2305e16fd51d02f47048f12" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5a977680b22728e531fdfd7c336e11b068d8b1d4c54fd1bbfdf113f0c31dde5
[INFO] running `Command { std: "docker" "start" "-a" "a5a977680b22728e531fdfd7c336e11b068d8b1d4c54fd1bbfdf113f0c31dde5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5a977680b22728e531fdfd7c336e11b068d8b1d4c54fd1bbfdf113f0c31dde5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5a977680b22728e531fdfd7c336e11b068d8b1d4c54fd1bbfdf113f0c31dde5", kill_on_drop: false }`
[INFO] [stdout] a5a977680b22728e531fdfd7c336e11b068d8b1d4c54fd1bbfdf113f0c31dde5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+75530e9f72a1990ed2305e16fd51d02f47048f12" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3943a4a9191fc1ff3e4ec1e7d3559bfc05950ddedfed26b16327bead5452830
[INFO] running `Command { std: "docker" "start" "-a" "e3943a4a9191fc1ff3e4ec1e7d3559bfc05950ddedfed26b16327bead5452830", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/vector_test.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |       /// println!("{borrowed}"); <- occurs compile time error
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 | /     for i in &mut v {
[INFO] [stdout] 23 | |         *i *= -1;
[INFO] [stdout] 24 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]   --> src/error_handling_test.rs:4:26
[INFO] [stdout]    |
[INFO] [stdout] 4  | use std::io::{ErrorKind, Read};
[INFO] [stdout]    |                          ^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/main.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | mod error_handling_test;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Formatter`
[INFO] [stdout]   --> src/trait_test.rs:1:25
[INFO] [stdout]    |
[INFO] [stdout] 1  | use std::fmt::{Display, Formatter};
[INFO] [stdout]    |                         ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]   --> src/main.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | mod trait_test;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/vector_test.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |       /// println!("{borrowed}"); <- occurs compile time error
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 | /     for i in &mut v {
[INFO] [stdout] 23 | |         *i *= -1;
[INFO] [stdout] 24 | |     }
[INFO] [stdout]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/error_handling_test.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{ErrorKind, Read};
[INFO] [stdout]   |                          ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Formatter`
[INFO] [stdout]  --> src/trait_test.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{Display, Formatter};
[INFO] [stdout]   |                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/tuple_test.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let x = {
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/tuple_test.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let x = {
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ownership_test.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut text  = String::from("hello world");
[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/ownership_test.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut text  = String::from("hello world");
[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: unused variable: `square`
[INFO] [stdout]   --> src/struct_test_2.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let square = Rectangle::square(30);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_square`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]  --> src/enum_test.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let home = IpAddr::V4(127, 0, 0, 1);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]  --> src/enum_test.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let loopback = IpAddr::V6(String::from("::1"));
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/enum_test.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let m = Message::Move { x: 1, y: 2 };
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> src/enum_test.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let some_number = Some(5);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_char`
[INFO] [stdout]   --> src/enum_test.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let some_char = Some('e');
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `absent_number`
[INFO] [stdout]   --> src/enum_test.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let absent_number: Option<i32> = None;
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_absent_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enum_test.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let six = plus_one(five);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/enum_test.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let none = plus_one(None);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_spaces`
[INFO] [stdout]   --> src/enum_test.rs:53:20
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn move_player(num_spaces: u8) {}
[INFO] [stdout]    |                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_spaces`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `square`
[INFO] [stdout]   --> src/struct_test_2.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let square = Rectangle::square(30);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_square`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]  --> src/enum_test.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let home = IpAddr::V4(127, 0, 0, 1);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]  --> src/enum_test.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let loopback = IpAddr::V6(String::from("::1"));
[INFO] [stdout]   |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]   --> src/enum_test.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let m = Message::Move { x: 1, y: 2 };
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]   --> src/enum_test.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let some_number = Some(5);
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_char`
[INFO] [stdout]   --> src/enum_test.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let some_char = Some('e');
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `absent_number`
[INFO] [stdout]   --> src/enum_test.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let absent_number: Option<i32> = None;
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_absent_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/enum_test.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let six = plus_one(five);
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/enum_test.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let none = plus_one(None);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_spaces`
[INFO] [stdout]   --> src/enum_test.rs:53:20
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn move_player(num_spaces: u8) {}
[INFO] [stdout]    |                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_spaces`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `borrowed`
[INFO] [stdout]   --> src/vector_test.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let borrowed = &v[0];
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrowed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/vector_test.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     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: `s3`
[INFO] [stdout]  --> src/string_test.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s3 = s1 + &s2;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `borrowed`
[INFO] [stdout]   --> src/vector_test.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let borrowed = &v[0];
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_borrowed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `row`
[INFO] [stdout]   --> src/vector_test.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     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: `score`
[INFO] [stdout]   --> src/hashmap_test.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     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: `s3`
[INFO] [stdout]  --> src/string_test.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let s3 = s1 + &s2;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file_result`
[INFO] [stdout]  --> src/error_handling_test.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let greeting_file_result = File::open("hello.txt");
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]  --> src/error_handling_test.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let greeting_file = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `score`
[INFO] [stdout]   --> src/hashmap_test.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     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_result`
[INFO] [stdout]  --> src/error_handling_test.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let greeting_file_result = File::open("hello.txt");
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `greeting_file`
[INFO] [stdout]  --> src/error_handling_test.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let greeting_file = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_greeting_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/variable_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/tuple_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `condition_fn` is never used
[INFO] [stdout]   --> src/tuple_test.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn condition_fn() -> () {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/loop_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/ownership_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_ownership` is never used
[INFO] [stdout]   --> src/ownership_test.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn takes_ownership(some_string: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_ownership` is never used
[INFO] [stdout]   --> src/ownership_test.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn borrow_ownership(some_string: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `no_dangle` is never used
[INFO] [stdout]   --> src/ownership_test.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn no_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/ownership_test.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn first_word(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/struct_test.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]  --> src/struct_test.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/struct_test.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlwaysEqual` is never constructed
[INFO] [stdout]   --> src/struct_test.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct AlwaysEqual;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/struct_test.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/struct_test.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn build_user(username: String, email: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/struct_test_2.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area`, `can_hold`, and `square` are never used
[INFO] [stdout]   --> src/struct_test_2.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 8  |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn square(size: u32) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/struct_test_2.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/enum_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/enum_test.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     impl Message {
[INFO] [stdout]    |     ------------ method in this implementation
[INFO] [stdout] 21 |         fn call(&self) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]   --> src/enum_test.rs:74:6
[INFO] [stdout]    |
[INFO] [stdout] 74 | enum UsState {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `existed_in` is never used
[INFO] [stdout]   --> src/enum_test.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | impl UsState {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 80 |     fn existed_in(&self, year: u16) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/enum_test.rs:89:6
[INFO] [stdout]    |
[INFO] [stdout] 89 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/enum_test.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]   --> src/module_test_2.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn seat_at_table() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]   --> src/module_test_2.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn take_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> src/module_test_2.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn serve_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> src/module_test_2.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn take_payment() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/vector_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/string_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/hashmap_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/error_handling_test.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/error_handling_test.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_char_of_first_line` is never used
[INFO] [stdout]   --> src/error_handling_test.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn last_char_of_first_line(text: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generics_test.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Point<X1, Y1> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mix_up` is never used
[INFO] [stdout]  --> src/generics_test.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<X1, Y1> Point<X1, Y1> {
[INFO] [stdout]   | -------------------------- method in this implementation
[INFO] [stdout] 9 |     fn mix_up<X2, Y2>(self, other: Point<X2, Y2>) -> Point<X1, Y2> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sum` is never used
[INFO] [stdout]   --> src/generics_test.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Point<i32, i32> {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] 18 |     fn sum(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/generics_test.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/generics_test.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 29 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/generics_test.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | / impl<T> Pair<T>
[INFO] [stdout] 35 | | where
[INFO] [stdout] 36 | |     T: Display + PartialOrd,
[INFO] [stdout]    | |____________________________- method in this implementation
[INFO] [stdout] 37 |   {
[INFO] [stdout] 38 |       fn cmp_display(&self) {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/generics_test.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `summarize` and `extract` are never used
[INFO] [stdout]  --> src/trait_test.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Summary {
[INFO] [stdout]   |           ------- methods in this trait
[INFO] [stdout] 4 |     fn summarize(&self) -> String;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 5 |
[INFO] [stdout] 6 |     fn extract(&self) -> String {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/trait_test.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/trait_test.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 28 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> src/trait_test.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/trait_test.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn notify<T>(item: &T)
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/trait_test.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/lifetime_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/variable_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/tuple_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `condition_fn` is never used
[INFO] [stdout]   --> src/tuple_test.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn condition_fn() -> () {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/loop_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/ownership_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `takes_ownership` is never used
[INFO] [stdout]   --> src/ownership_test.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn takes_ownership(some_string: String) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_ownership` is never used
[INFO] [stdout]   --> src/ownership_test.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn borrow_ownership(some_string: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `no_dangle` is never used
[INFO] [stdout]   --> src/ownership_test.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn no_dangle() -> String {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/ownership_test.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn first_word(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/struct_test.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]  --> src/struct_test.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/struct_test.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlwaysEqual` is never constructed
[INFO] [stdout]   --> src/struct_test.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct AlwaysEqual;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/struct_test.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_user` is never used
[INFO] [stdout]   --> src/struct_test.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn build_user(username: String, email: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/struct_test_2.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `area`, `can_hold`, and `square` are never used
[INFO] [stdout]   --> src/struct_test_2.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rectangle {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 8  |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn square(size: u32) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/struct_test_2.rs:24:4
[INFO] [stdout]    |
[INFO] [stdout] 24 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/enum_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `call` is never used
[INFO] [stdout]   --> src/enum_test.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     impl Message {
[INFO] [stdout]    |     ------------ method in this implementation
[INFO] [stdout] 21 |         fn call(&self) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UsState` is never used
[INFO] [stdout]   --> src/enum_test.rs:74:6
[INFO] [stdout]    |
[INFO] [stdout] 74 | enum UsState {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `existed_in` is never used
[INFO] [stdout]   --> src/enum_test.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 79 | impl UsState {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 80 |     fn existed_in(&self, year: u16) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Coin` is never used
[INFO] [stdout]   --> src/enum_test.rs:89:6
[INFO] [stdout]    |
[INFO] [stdout] 89 | enum Coin {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `value_in_cents` is never used
[INFO] [stdout]   --> src/enum_test.rs:96:4
[INFO] [stdout]    |
[INFO] [stdout] 96 | fn value_in_cents(coin: Coin) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `seat_at_table` is never used
[INFO] [stdout]   --> src/module_test_2.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn seat_at_table() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_order` is never used
[INFO] [stdout]   --> src/module_test_2.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 22 |     fn take_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `serve_order` is never used
[INFO] [stdout]   --> src/module_test_2.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn serve_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `take_payment` is never used
[INFO] [stdout]   --> src/module_test_2.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 |     fn take_payment() {}
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/vector_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/string_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/hashmap_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/error_handling_test.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]   --> src/error_handling_test.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `last_char_of_first_line` is never used
[INFO] [stdout]   --> src/error_handling_test.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn last_char_of_first_line(text: &str) -> Option<char> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]  --> src/generics_test.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Point<X1, Y1> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `mix_up` is never used
[INFO] [stdout]  --> src/generics_test.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<X1, Y1> Point<X1, Y1> {
[INFO] [stdout]   | -------------------------- method in this implementation
[INFO] [stdout] 9 |     fn mix_up<X2, Y2>(self, other: Point<X2, Y2>) -> Point<X1, Y2> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `sum` is never used
[INFO] [stdout]   --> src/generics_test.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Point<i32, i32> {
[INFO] [stdout]    | -------------------- method in this implementation
[INFO] [stdout] 18 |     fn sum(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]   --> src/generics_test.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct Pair<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/generics_test.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<T> Pair<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 29 |     fn new(x: T, y: T) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]   --> src/generics_test.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | / impl<T> Pair<T>
[INFO] [stdout] 35 | | where
[INFO] [stdout] 36 | |     T: Display + PartialOrd,
[INFO] [stdout]    | |____________________________- method in this implementation
[INFO] [stdout] 37 |   {
[INFO] [stdout] 38 |       fn cmp_display(&self) {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/generics_test.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `summarize` and `extract` are never used
[INFO] [stdout]  --> src/trait_test.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Summary {
[INFO] [stdout]   |           ------- methods in this trait
[INFO] [stdout] 4 |     fn summarize(&self) -> String;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 5 |
[INFO] [stdout] 6 |     fn extract(&self) -> String {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/trait_test.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]   --> src/trait_test.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 28 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]   --> src/trait_test.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `notify` is never used
[INFO] [stdout]   --> src/trait_test.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 | pub fn notify<T>(item: &T)
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/trait_test.rs:58:4
[INFO] [stdout]    |
[INFO] [stdout] 58 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/lifetime_test.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest` is never used
[INFO] [stdout]   --> src/lifetime_test.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/test_cases.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/test_cases.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/test_cases.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 12 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `greeting` is never used
[INFO] [stdout]   --> src/test_cases.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn greeting(name: &str) -> String {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `panic_fn` is never used
[INFO] [stdout]   --> src/test_cases.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn panic_fn(num: u64) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "e3943a4a9191fc1ff3e4ec1e7d3559bfc05950ddedfed26b16327bead5452830", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3943a4a9191fc1ff3e4ec1e7d3559bfc05950ddedfed26b16327bead5452830", kill_on_drop: false }`
[INFO] [stdout] e3943a4a9191fc1ff3e4ec1e7d3559bfc05950ddedfed26b16327bead5452830