[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 }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielc92%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7e34a856181e838b5b9408ccf1cdd0c94f34a52
[INFO] checking danielc92/learning-rust against try#c8bdaa84ec1b37f18f30375e196a65b7602f3790 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielc92%2Flearning-rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danielc92/learning-rust on toolchain c8bdaa84ec1b37f18f30375e196a65b7602f3790
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danielc92/learning-rust
[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-4/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" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9cd154f02aa6cd91bbf144fb7ba01bca5230787ee2a739527ca9c489aacd3c61
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9cd154f02aa6cd91bbf144fb7ba01bca5230787ee2a739527ca9c489aacd3c61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9cd154f02aa6cd91bbf144fb7ba01bca5230787ee2a739527ca9c489aacd3c61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cd154f02aa6cd91bbf144fb7ba01bca5230787ee2a739527ca9c489aacd3c61", kill_on_drop: false }`
[INFO] [stdout] 9cd154f02aa6cd91bbf144fb7ba01bca5230787ee2a739527ca9c489aacd3c61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+c8bdaa84ec1b37f18f30375e196a65b7602f3790" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a767e04a1a4e80fb45fd08e57cd8cbf526c7fc3d666de8d671b103f3ff528fc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9a767e04a1a4e80fb45fd08e57cd8cbf526c7fc3d666de8d671b103f3ff528fc", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling ring v0.16.14
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking pem v0.8.1
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking simple_asn1 v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]     Checking serde v1.0.111
[INFO] [stderr]     Checking serde_json v1.0.55
[INFO] [stderr]     Checking jsonwebtoken v7.1.1
[INFO] [stderr]     Checking learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Duration`, `UNIX_EPOCH`
[INFO] [stdout]  --> src/datetime_stuff.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::{Duration, SystemTime, UNIX_EPOCH};
[INFO] [stdout]   |                 ^^^^^^^^              ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_tuple`
[INFO] [stdout]  --> src/array_stuff.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let num_tuple = (3, 5, 4);
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_tuple`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fixed_array`
[INFO] [stdout]  --> src/array_stuff.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let fixed_array: [i32; 3] = [1, 2, 1];
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_fixed_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `desk_items`
[INFO] [stdout]   --> src/array_stuff.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let desk_items: Vec<DeskItem> = vec![pencil, lamp];
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_desk_items`
[INFO] [stdout] 
[INFO] [stdout] 
[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] 
[INFO] [stdout] warning: unused variable: `signed_num_1`
[INFO] [stdout]  --> src/variable_stuff.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let signed_num_1: i8 = 20;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_2`
[INFO] [stdout]  --> src/variable_stuff.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let signed_num_2: i16 = -32500;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_3`
[INFO] [stdout]  --> src/variable_stuff.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let signed_num_3: i32 = 32500;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_4`
[INFO] [stdout]  --> src/variable_stuff.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let signed_num_4: i64 = 9223372036854775807;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_5`
[INFO] [stdout]  --> src/variable_stuff.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let signed_num_5: i128 = -170141183460469231731687303715884105728;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_0`
[INFO] [stdout]  --> src/variable_stuff.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let unsigned_num_0: u8 = 0;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_1`
[INFO] [stdout]   --> src/variable_stuff.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let unsigned_num_1: u8 = 255;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_2`
[INFO] [stdout]   --> src/variable_stuff.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let unsigned_num_2: u16 = 65535;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_3`
[INFO] [stdout]   --> src/variable_stuff.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let unsigned_num_3: u32 = 4294967295;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_4`
[INFO] [stdout]   --> src/variable_stuff.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let unsigned_num_4: u64 = 18_446_744_073_709_551_615;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_5`
[INFO] [stdout]   --> src/variable_stuff.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let unsigned_num_5: u128 = 23;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `binding` is assigned to, but never used
[INFO] [stdout]   --> src/variable_stuff.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let binding;
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_binding` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `binding` is never read
[INFO] [stdout]   --> src/variable_stuff.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     binding = 12345;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[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 is never used: `try_it_out`
[INFO] [stdout]  --> src/array_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `try_it_out`
[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 is never used: `run`
[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: function is never used: `area_of_square`
[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 is never used: `sum_array_nums`
[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 is never used: `loop_until`
[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 is never used: `match_student`
[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 is never used: `if_elsing`
[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 is never used: `loop_with_break`
[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 is never used: `loop_array_with_an_index`
[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 is never used: `while_with_break`
[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 is never used: `validate_name`
[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 is never used: `validate_number`
[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 is never used: `try_it_out`
[INFO] [stdout]  --> src/struct_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `try_it_out`
[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 is never used: `try_it_out`
[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: 35 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Duration`, `UNIX_EPOCH`
[INFO] [stdout]  --> src/datetime_stuff.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::{Duration, SystemTime, UNIX_EPOCH};
[INFO] [stdout]   |                 ^^^^^^^^              ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_tuple`
[INFO] [stdout]  --> src/array_stuff.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let num_tuple = (3, 5, 4);
[INFO] [stdout]   |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_tuple`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `fixed_array`
[INFO] [stdout]  --> src/array_stuff.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let fixed_array: [i32; 3] = [1, 2, 1];
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_fixed_array`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `desk_items`
[INFO] [stdout]   --> src/array_stuff.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let desk_items: Vec<DeskItem> = vec![pencil, lamp];
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_desk_items`
[INFO] [stdout] 
[INFO] [stdout] 
[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] 
[INFO] [stdout] warning: unused variable: `signed_num_1`
[INFO] [stdout]  --> src/variable_stuff.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let signed_num_1: i8 = 20;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_2`
[INFO] [stdout]  --> src/variable_stuff.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let signed_num_2: i16 = -32500;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_3`
[INFO] [stdout]  --> src/variable_stuff.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let signed_num_3: i32 = 32500;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_4`
[INFO] [stdout]  --> src/variable_stuff.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let signed_num_4: i64 = 9223372036854775807;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `signed_num_5`
[INFO] [stdout]  --> src/variable_stuff.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let signed_num_5: i128 = -170141183460469231731687303715884105728;
[INFO] [stdout]   |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_signed_num_5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_0`
[INFO] [stdout]  --> src/variable_stuff.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let unsigned_num_0: u8 = 0;
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_1`
[INFO] [stdout]   --> src/variable_stuff.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let unsigned_num_1: u8 = 255;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_2`
[INFO] [stdout]   --> src/variable_stuff.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let unsigned_num_2: u16 = 65535;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_3`
[INFO] [stdout]   --> src/variable_stuff.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let unsigned_num_3: u32 = 4294967295;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_4`
[INFO] [stdout]   --> src/variable_stuff.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let unsigned_num_4: u64 = 18_446_744_073_709_551_615;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unsigned_num_5`
[INFO] [stdout]   --> src/variable_stuff.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let unsigned_num_5: u128 = 23;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unsigned_num_5`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `binding` is assigned to, but never used
[INFO] [stdout]   --> src/variable_stuff.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let binding;
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_binding` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `binding` is never read
[INFO] [stdout]   --> src/variable_stuff.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     binding = 12345;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[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 is never used: `try_it_out`
[INFO] [stdout]  --> src/array_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `try_it_out`
[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 is never used: `run`
[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: function is never used: `area_of_square`
[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 is never used: `sum_array_nums`
[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 is never used: `loop_until`
[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 is never used: `match_student`
[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 is never used: `if_elsing`
[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 is never used: `loop_with_break`
[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 is never used: `loop_array_with_an_index`
[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 is never used: `while_with_break`
[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 is never used: `validate_name`
[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 is never used: `validate_number`
[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 is never used: `try_it_out`
[INFO] [stdout]  --> src/struct_stuff.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn try_it_out() {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `try_it_out`
[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 is never used: `try_it_out`
[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: 35 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.82s
[INFO] running `Command { std: "docker" "inspect" "9a767e04a1a4e80fb45fd08e57cd8cbf526c7fc3d666de8d671b103f3ff528fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a767e04a1a4e80fb45fd08e57cd8cbf526c7fc3d666de8d671b103f3ff528fc", kill_on_drop: false }`
[INFO] [stdout] 9a767e04a1a4e80fb45fd08e57cd8cbf526c7fc3d666de8d671b103f3ff528fc