[INFO] cloning repository https://github.com/danielc92/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danielc92/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielc92%2Flearning-rust", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23ccfc34e5883ee77ec11f69c2f608412fb6bcd5
[INFO] testing danielc92/learning-rust against 1.63.0 for beta-1.64-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielc92%2Flearning-rust" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danielc92/learning-rust on toolchain 1.63.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.63.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
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[INFO] finished tweaking git repo https://github.com/danielc92/learning-rust
[INFO] tweaked toml for git repo https://github.com/danielc92/learning-rust written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/danielc92/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.63.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] warning: unused variable: `is_watching`
[INFO] [stdout]  --> src/bool_stuff.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let is_watching: bool = false;
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_watching`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/stdin_stuff.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Ok(x) => Ok(buffer.trim().to_string()),
[INFO] [stdout]   |            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/looping_stuff.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut my_array: [i32; 10] = [1, 123, 32, 4, 33, 5235, 4325, 345, 23, 3];
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `linear_search` is never used
[INFO] [stdout]  --> src/algorithm_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn linear_search(sample: &[usize; 10], target: &usize) -> Option<String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `binary_search` is never used
[INFO] [stdout]   --> src/algorithm_stuff.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn binary_search(sample: &[usize; 10], target: usize) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `userId`, `id`, `title` and `completed` are never read
[INFO] [stdout]   --> src/api_stuff.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct User {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 15 |     userId: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 16 |     id: i32,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 17 |     title: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 18 |     completed: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_todos` is never used
[INFO] [stdout]   --> src/api_stuff.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub async fn get_todos() -> Result<Vec<User>, Error> {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/array_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/bool_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/datetime_stuff.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]  --> src/enum_stuff.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Direction {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_dir` is never used
[INFO] [stdout]  --> src/enum_stuff.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn display_dir() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_read_to_succeed` is never used
[INFO] [stdout]  --> src/error_handling.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn file_read_to_succeed() -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_read_to_fail` is never used
[INFO] [stdout]  --> src/error_handling.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn file_read_to_fail() -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_of_square` is never used
[INFO] [stdout]  --> src/function_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn area_of_square(length: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_array_nums` is never used
[INFO] [stdout]  --> src/function_stuff.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn sum_array_nums(arr: &[i32]) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_until` is never used
[INFO] [stdout]   --> src/function_stuff.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn loop_until(number: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_student` is never used
[INFO] [stdout]   --> src/function_stuff.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn match_student(grade: u16) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_elsing` is never used
[INFO] [stdout]   --> src/function_stuff.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn if_elsing(name: &String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_with_break` is never used
[INFO] [stdout]  --> src/looping_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn loop_with_break() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_array_with_an_index` is never used
[INFO] [stdout]   --> src/looping_stuff.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn loop_array_with_an_index() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `while_with_break` is never used
[INFO] [stdout]   --> src/looping_stuff.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn while_with_break() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_name` is never used
[INFO] [stdout]  --> src/some_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn validate_name(name: &String) -> Option<String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_number` is never used
[INFO] [stdout]  --> src/some_stuff.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn validate_number(number: &i32) -> Option<String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_to_option` is never used
[INFO] [stdout]   --> src/some_stuff.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn add_to_option(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_enrolled` is never used
[INFO] [stdout]   --> src/some_stuff.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn return_enrolled(name: &str) -> Option<&str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_input` is never used
[INFO] [stdout]  --> src/stdin_stuff.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn get_input(q: &str) -> io::Result<String> {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_task` is never used
[INFO] [stdout]  --> src/struct_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn a_task() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_coord` is never used
[INFO] [stdout]   --> src/struct_stuff.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn a_coord() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_basket` is never used
[INFO] [stdout]   --> src/struct_stuff.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn a_basket() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/token_stuff.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/variable_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `userId` should have a snake case name
[INFO] [stdout]   --> src/api_stuff.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     userId: i32,
[INFO] [stdout]    |     ^^^^^^ help: convert the identifier to snake case: `user_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 33 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 03s
[INFO] running `Command { std: "docker" "inspect" "2ff6e5ddcfd7aa6629287af0308aafb953729e12819356440c615c697486cac7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ff6e5ddcfd7aa6629287af0308aafb953729e12819356440c615c697486cac7", kill_on_drop: false }`
[INFO] [stdout] 2ff6e5ddcfd7aa6629287af0308aafb953729e12819356440c615c697486cac7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+1.63.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e4491e341547fbf32c1053b9ba710d1315a409fd6294936936b7462c457660c
[INFO] running `Command { std: "docker" "start" "-a" "9e4491e341547fbf32c1053b9ba710d1315a409fd6294936936b7462c457660c", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `is_watching`
[INFO] [stdout]  --> src/bool_stuff.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let is_watching: bool = false;
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_watching`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/stdin_stuff.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Ok(x) => Ok(buffer.trim().to_string()),
[INFO] [stdout]   |            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/looping_stuff.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut my_array: [i32; 10] = [1, 123, 32, 4, 33, 5235, 4325, 345, 23, 3];
[INFO] [stdout]    |         ----^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `linear_search` is never used
[INFO] [stdout]  --> src/algorithm_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn linear_search(sample: &[usize; 10], target: &usize) -> Option<String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `binary_search` is never used
[INFO] [stdout]   --> src/algorithm_stuff.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub fn binary_search(sample: &[usize; 10], target: usize) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `userId`, `id`, `title` and `completed` are never read
[INFO] [stdout]   --> src/api_stuff.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct User {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 15 |     userId: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 16 |     id: i32,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 17 |     title: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 18 |     completed: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_todos` is never used
[INFO] [stdout]   --> src/api_stuff.rs:21:14
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub async fn get_todos() -> Result<Vec<User>, Error> {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/array_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/bool_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/datetime_stuff.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]  --> src/enum_stuff.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Direction {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `display_dir` is never used
[INFO] [stdout]  --> src/enum_stuff.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn display_dir() {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_read_to_succeed` is never used
[INFO] [stdout]  --> src/error_handling.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn file_read_to_succeed() -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `file_read_to_fail` is never used
[INFO] [stdout]  --> src/error_handling.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn file_read_to_fail() -> String {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `area_of_square` is never used
[INFO] [stdout]  --> src/function_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn area_of_square(length: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `sum_array_nums` is never used
[INFO] [stdout]  --> src/function_stuff.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn sum_array_nums(arr: &[i32]) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_until` is never used
[INFO] [stdout]   --> src/function_stuff.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn loop_until(number: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `match_student` is never used
[INFO] [stdout]   --> src/function_stuff.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub fn match_student(grade: u16) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `if_elsing` is never used
[INFO] [stdout]   --> src/function_stuff.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn if_elsing(name: &String) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_with_break` is never used
[INFO] [stdout]  --> src/looping_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn loop_with_break() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `loop_array_with_an_index` is never used
[INFO] [stdout]   --> src/looping_stuff.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn loop_array_with_an_index() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `while_with_break` is never used
[INFO] [stdout]   --> src/looping_stuff.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn while_with_break() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_name` is never used
[INFO] [stdout]  --> src/some_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn validate_name(name: &String) -> Option<String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_number` is never used
[INFO] [stdout]  --> src/some_stuff.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn validate_number(number: &i32) -> Option<String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_to_option` is never used
[INFO] [stdout]   --> src/some_stuff.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn add_to_option(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_enrolled` is never used
[INFO] [stdout]   --> src/some_stuff.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn return_enrolled(name: &str) -> Option<&str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_input` is never used
[INFO] [stdout]  --> src/stdin_stuff.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn get_input(q: &str) -> io::Result<String> {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_task` is never used
[INFO] [stdout]  --> src/struct_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn a_task() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_coord` is never used
[INFO] [stdout]   --> src/struct_stuff.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn a_coord() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_basket` is never used
[INFO] [stdout]   --> src/struct_stuff.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn a_basket() {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/token_stuff.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `try_it_out` is never used
[INFO] [stdout]  --> src/variable_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: structure field `userId` should have a snake case name
[INFO] [stdout]   --> src/api_stuff.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     userId: i32,
[INFO] [stdout]    |     ^^^^^^ help: convert the identifier to snake case: `user_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 33 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "9e4491e341547fbf32c1053b9ba710d1315a409fd6294936936b7462c457660c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e4491e341547fbf32c1053b9ba710d1315a409fd6294936936b7462c457660c", kill_on_drop: false }`
[INFO] [stdout] 9e4491e341547fbf32c1053b9ba710d1315a409fd6294936936b7462c457660c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+1.63.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3c6284642a60a38cfcdb5583a4f873ff9b715bd6edcdea84414b54756ea69f9a
[INFO] running `Command { std: "docker" "start" "-a" "3c6284642a60a38cfcdb5583a4f873ff9b715bd6edcdea84414b54756ea69f9a", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `is_watching`
[INFO] [stderr]  --> src/bool_stuff.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let is_watching: bool = false;
[INFO] [stderr]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_watching`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/stdin_stuff.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |         Ok(x) => Ok(buffer.trim().to_string()),
[INFO] [stderr]   |            ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/looping_stuff.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut my_array: [i32; 10] = [1, 123, 32, 4, 33, 5235, 4325, 345, 23, 3];
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `linear_search` is never used
[INFO] [stderr]  --> src/algorithm_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn linear_search(sample: &[usize; 10], target: &usize) -> Option<String> {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `binary_search` is never used
[INFO] [stderr]   --> src/algorithm_stuff.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn binary_search(sample: &[usize; 10], target: usize) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `userId`, `id`, `title` and `completed` are never read
[INFO] [stderr]   --> src/api_stuff.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub struct User {
[INFO] [stderr]    |            ---- fields in this struct
[INFO] [stderr] 15 |     userId: i32,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 16 |     id: i32,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 17 |     title: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 18 |     completed: bool,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_todos` is never used
[INFO] [stderr]   --> src/api_stuff.rs:21:14
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub async fn get_todos() -> Result<Vec<User>, Error> {
[INFO] [stderr]    |              ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `try_it_out` is never used
[INFO] [stderr]  --> src/array_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn try_it_out() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `try_it_out` is never used
[INFO] [stderr]  --> src/bool_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn try_it_out() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]  --> src/datetime_stuff.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn run() {
[INFO] [stderr]   |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Direction` is never used
[INFO] [stderr]  --> src/enum_stuff.rs:1:6
[INFO] [stderr]   |
[INFO] [stderr] 1 | enum Direction {
[INFO] [stderr]   |      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `display_dir` is never used
[INFO] [stderr]  --> src/enum_stuff.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn display_dir() {
[INFO] [stderr]   |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `file_read_to_succeed` is never used
[INFO] [stderr]  --> src/error_handling.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn file_read_to_succeed() -> String {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `file_read_to_fail` is never used
[INFO] [stderr]  --> src/error_handling.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn file_read_to_fail() -> String {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `area_of_square` is never used
[INFO] [stderr]  --> src/function_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn area_of_square(length: i32) -> i32 {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `sum_array_nums` is never used
[INFO] [stderr]  --> src/function_stuff.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn sum_array_nums(arr: &[i32]) {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `loop_until` is never used
[INFO] [stderr]   --> src/function_stuff.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn loop_until(number: i32) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `match_student` is never used
[INFO] [stderr]   --> src/function_stuff.rs:33:8
[INFO] [stderr]    |
[INFO] [stderr] 33 | pub fn match_student(grade: u16) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `if_elsing` is never used
[INFO] [stderr]   --> src/function_stuff.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 | pub fn if_elsing(name: &String) -> String {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `loop_with_break` is never used
[INFO] [stderr]  --> src/looping_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn loop_with_break() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `loop_array_with_an_index` is never used
[INFO] [stderr]   --> src/looping_stuff.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn loop_array_with_an_index() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `while_with_break` is never used
[INFO] [stderr]   --> src/looping_stuff.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn while_with_break() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `validate_name` is never used
[INFO] [stderr]  --> src/some_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn validate_name(name: &String) -> Option<String> {
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `validate_number` is never used
[INFO] [stderr]  --> src/some_stuff.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn validate_number(number: &i32) -> Option<String> {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `add_to_option` is never used
[INFO] [stderr]   --> src/some_stuff.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn add_to_option(x: Option<i32>) -> Option<i32> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `return_enrolled` is never used
[INFO] [stderr]   --> src/some_stuff.rs:33:4
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn return_enrolled(name: &str) -> Option<&str> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `get_input` is never used
[INFO] [stderr]  --> src/stdin_stuff.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn get_input(q: &str) -> io::Result<String> {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `a_task` is never used
[INFO] [stderr]  --> src/struct_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn a_task() {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `a_coord` is never used
[INFO] [stderr]   --> src/struct_stuff.rs:27:8
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn a_coord() {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `a_basket` is never used
[INFO] [stderr]   --> src/struct_stuff.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn a_basket() {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `try_it_out` is never used
[INFO] [stderr]  --> src/token_stuff.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn try_it_out() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `try_it_out` is never used
[INFO] [stderr]  --> src/variable_stuff.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn try_it_out() {
[INFO] [stderr]   |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: structure field `userId` should have a snake case name
[INFO] [stderr]   --> src/api_stuff.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     userId: i32,
[INFO] [stderr]    |     ^^^^^^ help: convert the identifier to snake case: `user_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `learning-rust` (bin "learning-rust" test) generated 33 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learning_rust-313ff7816dee61b0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3c6284642a60a38cfcdb5583a4f873ff9b715bd6edcdea84414b54756ea69f9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c6284642a60a38cfcdb5583a4f873ff9b715bd6edcdea84414b54756ea69f9a", kill_on_drop: false }`
[INFO] [stdout] 3c6284642a60a38cfcdb5583a4f873ff9b715bd6edcdea84414b54756ea69f9a