[INFO] cloning repository https://github.com/sulabhkothari/SkRustLearn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sulabhkothari/SkRustLearn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsulabhkothari%2FSkRustLearn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsulabhkothari%2FSkRustLearn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0593d5dce8c4c97bb399ff38bf37f803bb3f8e72
[INFO] checking sulabhkothari/SkRustLearn against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsulabhkothari%2FSkRustLearn" "/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/sulabhkothari/SkRustLearn on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sulabhkothari/SkRustLearn
[INFO] finished tweaking git repo https://github.com/sulabhkothari/SkRustLearn
[INFO] tweaked toml for git repo https://github.com/sulabhkothari/SkRustLearn written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sulabhkothari/SkRustLearn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "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" "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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 808a016462cddaa1a0a1bacdbf73cf7f046f1b886d1b842a13008d33fddad2bc
[INFO] running `Command { std: "docker" "start" "-a" "808a016462cddaa1a0a1bacdbf73cf7f046f1b886d1b842a13008d33fddad2bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "808a016462cddaa1a0a1bacdbf73cf7f046f1b886d1b842a13008d33fddad2bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "808a016462cddaa1a0a1bacdbf73cf7f046f1b886d1b842a13008d33fddad2bc", kill_on_drop: false }`
[INFO] [stdout] 808a016462cddaa1a0a1bacdbf73cf7f046f1b886d1b842a13008d33fddad2bc
[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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 397c5853b463b86a5d2c3879eacce01393135a9ed0315e467a15fa5fccd1c258
[INFO] running `Command { std: "docker" "start" "-a" "397c5853b463b86a5d2c3879eacce01393135a9ed0315e467a15fa5fccd1c258", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking SkRustLearn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/fearless_concurrency.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/fearless_concurrency.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MemoryLeakingCons` is imported redundantly
[INFO] [stdout]    --> src/smart_pointers.rs:217:13
[INFO] [stdout]     |
[INFO] [stdout] 117 | use crate::smart_pointers::MemoryLeakingList::{MemoryLeakingCons, MemoryLeakingNil};
[INFO] [stdout]     |                                                ----------------- the item `MemoryLeakingCons` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 217 |         use crate::smart_pointers::MemoryLeakingList::MemoryLeakingCons;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/fearless_concurrency.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/fearless_concurrency.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `MemoryLeakingCons` is imported redundantly
[INFO] [stdout]    --> src/smart_pointers.rs:217:13
[INFO] [stdout]     |
[INFO] [stdout] 117 | use crate::smart_pointers::MemoryLeakingList::{MemoryLeakingCons, MemoryLeakingNil};
[INFO] [stdout]     |                                                ----------------- the item `MemoryLeakingCons` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 217 |         use crate::smart_pointers::MemoryLeakingList::MemoryLeakingCons;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `Nil` is named the same as one of the variants of the type `LL`
[INFO] [stdout]    --> src/smart_pointers.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             Nil => println!(""),
[INFO] [stdout]     |             ^^^ help: to match on the variant, qualify the path: `LL::Nil`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/advanced_features.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let r = address as *const i32;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_strings`
[INFO] [stdout]    --> src/advanced_features.rs:446:9
[INFO] [stdout]     |
[INFO] [stdout] 446 |     let list_of_strings: Vec<String> = list_of_numbers.iter().map(ToString::to_string).collect();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_strings`
[INFO] [stdout]    --> src/advanced_features.rs:447:9
[INFO] [stdout]     |
[INFO] [stdout] 447 |     let list_of_strings: Vec<String> = list_of_numbers.iter().map(|i| i.to_string()).collect();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_statuses`
[INFO] [stdout]    --> src/advanced_features.rs:458:9
[INFO] [stdout]     |
[INFO] [stdout] 458 |     let list_of_statuses: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statuses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status_line`
[INFO] [stdout]   --> src/multithreaded_web_server.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (status_line, filename) = if buffer.starts_with(get) {
[INFO] [stdout]    |          ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_status_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]    --> src/object_oriented.rs:210:27
[INFO] [stdout]     |
[INFO] [stdout] 210 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pattern_matching.rs:42:10
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = (1, 2, 3);
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/pattern_matching.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = (1, 2, 3);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/pattern_matching.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = (1, 2, 3);
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feet`
[INFO] [stdout]   --> src/pattern_matching.rs:56:11
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |           ^^^^ help: if this is intentional, prefix it with an underscore: `_feet`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inches`
[INFO] [stdout]   --> src/pattern_matching.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_inches`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pattern_matching.rs:56:34
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                                  ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/pattern_matching.rs:56:37
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                                     ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]    --> src/pattern_matching.rs:175:9
[INFO] [stdout]     |
[INFO] [stdout] 175 |     let msg = Message::ChangeColor(0, 160, 255);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/pattern_matching.rs:229:9
[INFO] [stdout]     |
[INFO] [stdout] 229 |     let y = 10;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spd`
[INFO] [stdout]   --> src/smart_pointers.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn loan(spd: CustomSmartPointer) {
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_spd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/smart_pointers.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let b = Cons(Rc::new(RefCell::new(3)), Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/smart_pointers.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let c = Cons(Rc::new(RefCell::new(4)), Rc::clone(&a));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/smart_pointers.rs:203:18
[INFO] [stdout]     |
[INFO] [stdout] 203 |             Node(x, y) => println!(""),
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/smart_pointers.rs:203:21
[INFO] [stdout]     |
[INFO] [stdout] 203 |             Node(x, y) => println!(""),
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Nil`
[INFO] [stdout]    --> src/smart_pointers.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             Nil => println!(""),
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_Nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Nil`
[INFO] [stdout]    --> src/smart_pointers.rs:220:13
[INFO] [stdout]     |
[INFO] [stdout] 220 |             Nil => None,
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_Nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning[E0170]: pattern binding `Nil` is named the same as one of the variants of the type `LL`
[INFO] [stdout]    --> src/smart_pointers.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             Nil => println!(""),
[INFO] [stdout]     |             ^^^ help: to match on the variant, qualify the path: `LL::Nil`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `likely_crash`
[INFO] [stdout]    --> src/advanced_features.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn likely_crash() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Thunk`
[INFO] [stdout]    --> src/advanced_features.rs:315:1
[INFO] [stdout]     |
[INFO] [stdout] 315 | type Thunk = Box<dyn Fn() + Send + 'static>;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Result`
[INFO] [stdout]    --> src/advanced_features.rs:316:1
[INFO] [stdout]     |
[INFO] [stdout] 316 | type Result<T> = std::result::Result<T, std::io::Error>;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Stop`
[INFO] [stdout]    --> src/advanced_features.rs:454:9
[INFO] [stdout]     |
[INFO] [stdout] 454 |         Stop,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> src/advanced_features.rs:455:9
[INFO] [stdout]     |
[INFO] [stdout] 455 |         Quit { a: i32 },
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `send_multiple_msg_over_channel`
[INFO] [stdout]   --> src/fearless_concurrency.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn send_multiple_msg_over_channel() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]    --> src/pattern_matching.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |         Rgb(i32, i32, i32),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> src/pattern_matching.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |         Quit,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> src/pattern_matching.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |         Move { x: i32, y: i32 },
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> src/pattern_matching.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         Write(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]    --> src/pattern_matching.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |         y: i32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `z`
[INFO] [stdout]    --> src/pattern_matching.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         z: i32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `LL`
[INFO] [stdout]    --> src/smart_pointers.rs:193:6
[INFO] [stdout]     |
[INFO] [stdout] 193 | enum LL {
[INFO] [stdout]     |      ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]    --> src/smart_pointers.rs:199:8
[INFO] [stdout]     |
[INFO] [stdout] 199 |     fn last(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/advanced_features.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let r = address as *const i32;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_strings`
[INFO] [stdout]    --> src/advanced_features.rs:446:9
[INFO] [stdout]     |
[INFO] [stdout] 446 |     let list_of_strings: Vec<String> = list_of_numbers.iter().map(ToString::to_string).collect();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_strings`
[INFO] [stdout]    --> src/advanced_features.rs:447:9
[INFO] [stdout]     |
[INFO] [stdout] 447 |     let list_of_strings: Vec<String> = list_of_numbers.iter().map(|i| i.to_string()).collect();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_strings`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list_of_statuses`
[INFO] [stdout]    --> src/advanced_features.rs:458:9
[INFO] [stdout]     |
[INFO] [stdout] 458 |     let list_of_statuses: Vec<Status> = (0u32..20).map(Status::Value).collect();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_list_of_statuses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `status_line`
[INFO] [stdout]   --> src/multithreaded_web_server.rs:40:10
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let (status_line, filename) = if buffer.starts_with(get) {
[INFO] [stdout]    |          ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_status_line`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]    --> src/object_oriented.rs:210:27
[INFO] [stdout]     |
[INFO] [stdout] 210 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pattern_matching.rs:42:10
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = (1, 2, 3);
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/pattern_matching.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = (1, 2, 3);
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/pattern_matching.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let (x, y, z) = (1, 2, 3);
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feet`
[INFO] [stdout]   --> src/pattern_matching.rs:56:11
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |           ^^^^ help: if this is intentional, prefix it with an underscore: `_feet`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `inches`
[INFO] [stdout]   --> src/pattern_matching.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_inches`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/pattern_matching.rs:56:34
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                                  ^ help: try ignoring the field: `x: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/pattern_matching.rs:56:37
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let ((feet, inches), Point { x, y }) = ((3, 10), Point { x: 3, y: -10 });
[INFO] [stdout]    |                                     ^ help: try ignoring the field: `y: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]    --> src/pattern_matching.rs:175:9
[INFO] [stdout]     |
[INFO] [stdout] 175 |     let msg = Message::ChangeColor(0, 160, 255);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/pattern_matching.rs:229:9
[INFO] [stdout]     |
[INFO] [stdout] 229 |     let y = 10;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spd`
[INFO] [stdout]   --> src/smart_pointers.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn loan(spd: CustomSmartPointer) {
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_spd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/smart_pointers.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 |     let b = Cons(Rc::new(RefCell::new(3)), Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/smart_pointers.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         let c = Cons(Rc::new(RefCell::new(4)), Rc::clone(&a));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]    --> src/smart_pointers.rs:203:18
[INFO] [stdout]     |
[INFO] [stdout] 203 |             Node(x, y) => println!(""),
[INFO] [stdout]     |                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/smart_pointers.rs:203:21
[INFO] [stdout]     |
[INFO] [stdout] 203 |             Node(x, y) => println!(""),
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Nil`
[INFO] [stdout]    --> src/smart_pointers.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             Nil => println!(""),
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_Nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Nil`
[INFO] [stdout]    --> src/smart_pointers.rs:220:13
[INFO] [stdout]     |
[INFO] [stdout] 220 |             Nil => None,
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_Nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `typedPost` should have a snake case name
[INFO] [stdout]   --> src/object_oriented.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut typedPost = TypedPost::new();
[INFO] [stdout]    |             ^^^^^^^^^ help: convert the identifier to snake case: `typed_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `typedPost` should have a snake case name
[INFO] [stdout]   --> src/object_oriented.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let typedPost = typedPost.request_review();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `typed_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `typedPost` should have a snake case name
[INFO] [stdout]   --> src/object_oriented.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let typedPost = typedPost.approve();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `typed_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Nil` should have a snake case name
[INFO] [stdout]    --> src/smart_pointers.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             Nil => println!(""),
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Nil` should have a snake case name
[INFO] [stdout]    --> src/smart_pointers.rs:220:13
[INFO] [stdout]     |
[INFO] [stdout] 220 |             Nil => None,
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 45 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/bin.rs:541:13
[INFO] [stdout]     |
[INFO] [stdout] 541 |             _ => None,
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let a: [i32; 5] = [67; 5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/bin.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let index = 5;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]    --> src/bin.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |     let s1 = s.clone();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]    --> src/bin.rs:218:13
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let r1 = &mut s;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]    --> src/bin.rs:221:9
[INFO] [stdout]     |
[INFO] [stdout] 221 |     let r2 = &mut s;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reference_to_nothing`
[INFO] [stdout]    --> src/bin.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |     let reference_to_nothing = dangle();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `likely_crash`
[INFO] [stdout]    --> src/advanced_features.rs:104:4
[INFO] [stdout]     |
[INFO] [stdout] 104 | fn likely_crash() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Thunk`
[INFO] [stdout]    --> src/advanced_features.rs:315:1
[INFO] [stdout]     |
[INFO] [stdout] 315 | type Thunk = Box<dyn Fn() + Send + 'static>;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Result`
[INFO] [stdout]    --> src/advanced_features.rs:316:1
[INFO] [stdout]     |
[INFO] [stdout] 316 | type Result<T> = std::result::Result<T, std::io::Error>;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Stop`
[INFO] [stdout]    --> src/advanced_features.rs:454:9
[INFO] [stdout]     |
[INFO] [stdout] 454 |         Stop,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> src/advanced_features.rs:455:9
[INFO] [stdout]     |
[INFO] [stdout] 455 |         Quit { a: i32 },
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `send_multiple_msg_over_channel`
[INFO] [stdout]   --> src/fearless_concurrency.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn send_multiple_msg_over_channel() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]    --> src/pattern_matching.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |         Rgb(i32, i32, i32),
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> src/pattern_matching.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 |         Quit,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> src/pattern_matching.rs:170:9
[INFO] [stdout]     |
[INFO] [stdout] 170 |         Move { x: i32, y: i32 },
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> src/pattern_matching.rs:171:9
[INFO] [stdout]     |
[INFO] [stdout] 171 |         Write(String),
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]    --> src/pattern_matching.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |         y: i32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `z`
[INFO] [stdout]    --> src/pattern_matching.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 246 |         z: i32,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `LL`
[INFO] [stdout]    --> src/smart_pointers.rs:193:6
[INFO] [stdout]     |
[INFO] [stdout] 193 | enum LL {
[INFO] [stdout]     |      ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `last`
[INFO] [stdout]    --> src/smart_pointers.rs:199:8
[INFO] [stdout]     |
[INFO] [stdout] 199 |     fn last(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/bin.rs:306:9
[INFO] [stdout]     |
[INFO] [stdout] 306 |     let slice = &a[1..3];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]    --> src/bin.rs:311:9
[INFO] [stdout]     |
[INFO] [stdout] 311 |     let word = first_word(&my_string[..]);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/bin.rs:329:9
[INFO] [stdout]     |
[INFO] [stdout] 329 |     let s = "Hello, world!";
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]    --> src/bin.rs:524:9
[INFO] [stdout]     |
[INFO] [stdout] 524 |     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_string`
[INFO] [stdout]    --> src/bin.rs:525:9
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let some_string = Some("a string");
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `absent_number`
[INFO] [stdout]    --> src/bin.rs:527:9
[INFO] [stdout]     |
[INFO] [stdout] 527 |     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: `coin`
[INFO] [stdout]    --> src/bin.rs:555:9
[INFO] [stdout]     |
[INFO] [stdout] 555 |     let coin = Coin::Quarter(UsState::Alabama);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_coin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `typedPost` should have a snake case name
[INFO] [stdout]   --> src/object_oriented.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let mut typedPost = TypedPost::new();
[INFO] [stdout]    |             ^^^^^^^^^ help: convert the identifier to snake case: `typed_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `typedPost` should have a snake case name
[INFO] [stdout]   --> src/object_oriented.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let typedPost = typedPost.request_review();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `typed_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `typedPost` should have a snake case name
[INFO] [stdout]   --> src/object_oriented.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let typedPost = typedPost.approve();
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case: `typed_post`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Nil` should have a snake case name
[INFO] [stdout]    --> src/smart_pointers.rs:204:13
[INFO] [stdout]     |
[INFO] [stdout] 204 |             Nil => println!(""),
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Nil` should have a snake case name
[INFO] [stdout]    --> src/smart_pointers.rs:220:13
[INFO] [stdout]     |
[INFO] [stdout] 220 |             Nil => None,
[INFO] [stdout]     |             ^^^ help: convert the identifier to snake case: `nil`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 45 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `guessing_game`
[INFO] [stdout]   --> src/bin.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn guessing_game() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `five`
[INFO] [stdout]   --> src/bin.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn five() -> i32 {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `data_types`
[INFO] [stdout]   --> src/bin.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn data_types() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `control_flows`
[INFO] [stdout]   --> src/bin.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn control_flows() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `loops`
[INFO] [stdout]    --> src/bin.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn loops() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership`
[INFO] [stdout]    --> src/bin.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn ownership() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dangle`
[INFO] [stdout]    --> src/bin.rs:250:4
[INFO] [stdout]     |
[INFO] [stdout] 250 | fn dangle() -> String /*&String*/ {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]    --> src/bin.rs:258:4
[INFO] [stdout]     |
[INFO] [stdout] 258 | fn change(some_string: &mut String) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length_by_borrowing`
[INFO] [stdout]    --> src/bin.rs:262:4
[INFO] [stdout]     |
[INFO] [stdout] 262 | fn calculate_length_by_borrowing(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]    --> src/bin.rs:266:4
[INFO] [stdout]     |
[INFO] [stdout] 266 | fn calculate_length(s: String) -> (String, usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]    --> src/bin.rs:272:4
[INFO] [stdout]     |
[INFO] [stdout] 272 | fn gives_ownership() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]    --> src/bin.rs:285:4
[INFO] [stdout]     |
[INFO] [stdout] 285 | fn takes_and_gives_back(a_string: String) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]    --> src/bin.rs:292:4
[INFO] [stdout]     |
[INFO] [stdout] 292 | fn takes_ownership(some_string: String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]    --> src/bin.rs:298:4
[INFO] [stdout]     |
[INFO] [stdout] 298 | fn makes_copy(some_integer: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slices`
[INFO] [stdout]    --> src/bin.rs:303:4
[INFO] [stdout]     |
[INFO] [stdout] 303 | fn slices() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]    --> src/bin.rs:334:4
[INFO] [stdout]     |
[INFO] [stdout] 334 | fn first_word(s: &str) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_user`
[INFO] [stdout]    --> src/bin.rs:356:4
[INFO] [stdout]     |
[INFO] [stdout] 356 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `area`
[INFO] [stdout]    --> src/bin.rs:372:4
[INFO] [stdout]     |
[INFO] [stdout] 372 | fn area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `calculateArea`
[INFO] [stdout]    --> src/bin.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 |     fn calculateArea(&self) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]    --> src/bin.rs:381:8
[INFO] [stdout]     |
[INFO] [stdout] 381 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `square`
[INFO] [stdout]    --> src/bin.rs:386:8
[INFO] [stdout]     |
[INFO] [stdout] 386 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `structures`
[INFO] [stdout]    --> src/bin.rs:422:4
[INFO] [stdout]     |
[INFO] [stdout] 422 | fn structures() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> src/bin.rs:478:5
[INFO] [stdout]     |
[INFO] [stdout] 478 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> src/bin.rs:479:5
[INFO] [stdout]     |
[INFO] [stdout] 479 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> src/bin.rs:481:5
[INFO] [stdout]     |
[INFO] [stdout] 481 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]    --> src/bin.rs:483:5
[INFO] [stdout]     |
[INFO] [stdout] 483 |     ChangeColor(i32, i32, i32), //Tuple
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `call`
[INFO] [stdout]    --> src/bin.rs:487:8
[INFO] [stdout]     |
[INFO] [stdout] 487 |     fn call(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]    --> src/bin.rs:494:5
[INFO] [stdout]     |
[INFO] [stdout] 494 |     Alabama,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]    --> src/bin.rs:495:5
[INFO] [stdout]     |
[INFO] [stdout] 495 |     Alaska,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `California`
[INFO] [stdout]    --> src/bin.rs:496:5
[INFO] [stdout]     |
[INFO] [stdout] 496 |     California,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Texas`
[INFO] [stdout]    --> src/bin.rs:497:5
[INFO] [stdout]     |
[INFO] [stdout] 497 |     Texas,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]    --> src/bin.rs:500:6
[INFO] [stdout]     |
[INFO] [stdout] 500 | enum Coin {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value_in_cents`
[INFO] [stdout]    --> src/bin.rs:508:8
[INFO] [stdout]     |
[INFO] [stdout] 508 |     fn value_in_cents(&self) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enums`
[INFO] [stdout]    --> src/bin.rs:521:4
[INFO] [stdout]     |
[INFO] [stdout] 521 | fn enums() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `smart_pointers23`
[INFO] [stdout]    --> src/bin.rs:578:4
[INFO] [stdout]     |
[INFO] [stdout] 578 | fn smart_pointers23() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `SkRustLearnBin` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `sk_rust_learn_bin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `calculateArea` should have a snake case name
[INFO] [stdout]    --> src/bin.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 |     fn calculateArea(&self) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^ help: convert the identifier to snake case: `calculate_area`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 51 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/bin.rs:541:13
[INFO] [stdout]     |
[INFO] [stdout] 541 |             _ => None,
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let a: [i32; 5] = [67; 5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/bin.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let index = 5;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]    --> src/bin.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 157 |     let s1 = s.clone();
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]    --> src/bin.rs:218:13
[INFO] [stdout]     |
[INFO] [stdout] 218 |         let r1 = &mut s;
[INFO] [stdout]     |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]    --> src/bin.rs:221:9
[INFO] [stdout]     |
[INFO] [stdout] 221 |     let r2 = &mut s;
[INFO] [stdout]     |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reference_to_nothing`
[INFO] [stdout]    --> src/bin.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |     let reference_to_nothing = dangle();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference_to_nothing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]    --> src/bin.rs:306:9
[INFO] [stdout]     |
[INFO] [stdout] 306 |     let slice = &a[1..3];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]    --> src/bin.rs:311:9
[INFO] [stdout]     |
[INFO] [stdout] 311 |     let word = first_word(&my_string[..]);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]    --> src/bin.rs:329:9
[INFO] [stdout]     |
[INFO] [stdout] 329 |     let s = "Hello, world!";
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_number`
[INFO] [stdout]    --> src/bin.rs:524:9
[INFO] [stdout]     |
[INFO] [stdout] 524 |     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_string`
[INFO] [stdout]    --> src/bin.rs:525:9
[INFO] [stdout]     |
[INFO] [stdout] 525 |     let some_string = Some("a string");
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `absent_number`
[INFO] [stdout]    --> src/bin.rs:527:9
[INFO] [stdout]     |
[INFO] [stdout] 527 |     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: `coin`
[INFO] [stdout]    --> src/bin.rs:555:9
[INFO] [stdout]     |
[INFO] [stdout] 555 |     let coin = Coin::Quarter(UsState::Alabama);
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_coin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `guessing_game`
[INFO] [stdout]   --> src/bin.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn guessing_game() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `five`
[INFO] [stdout]   --> src/bin.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn five() -> i32 {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `data_types`
[INFO] [stdout]   --> src/bin.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn data_types() {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `control_flows`
[INFO] [stdout]   --> src/bin.rs:70:4
[INFO] [stdout]    |
[INFO] [stdout] 70 | fn control_flows() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `loops`
[INFO] [stdout]    --> src/bin.rs:100:4
[INFO] [stdout]     |
[INFO] [stdout] 100 | fn loops() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership`
[INFO] [stdout]    --> src/bin.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn ownership() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dangle`
[INFO] [stdout]    --> src/bin.rs:250:4
[INFO] [stdout]     |
[INFO] [stdout] 250 | fn dangle() -> String /*&String*/ {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `change`
[INFO] [stdout]    --> src/bin.rs:258:4
[INFO] [stdout]     |
[INFO] [stdout] 258 | fn change(some_string: &mut String) {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length_by_borrowing`
[INFO] [stdout]    --> src/bin.rs:262:4
[INFO] [stdout]     |
[INFO] [stdout] 262 | fn calculate_length_by_borrowing(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]    --> src/bin.rs:266:4
[INFO] [stdout]     |
[INFO] [stdout] 266 | fn calculate_length(s: String) -> (String, usize) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]    --> src/bin.rs:272:4
[INFO] [stdout]     |
[INFO] [stdout] 272 | fn gives_ownership() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]    --> src/bin.rs:285:4
[INFO] [stdout]     |
[INFO] [stdout] 285 | fn takes_and_gives_back(a_string: String) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]    --> src/bin.rs:292:4
[INFO] [stdout]     |
[INFO] [stdout] 292 | fn takes_ownership(some_string: String) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]    --> src/bin.rs:298:4
[INFO] [stdout]     |
[INFO] [stdout] 298 | fn makes_copy(some_integer: i32) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slices`
[INFO] [stdout]    --> src/bin.rs:303:4
[INFO] [stdout]     |
[INFO] [stdout] 303 | fn slices() {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]    --> src/bin.rs:334:4
[INFO] [stdout]     |
[INFO] [stdout] 334 | fn first_word(s: &str) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_user`
[INFO] [stdout]    --> src/bin.rs:356:4
[INFO] [stdout]     |
[INFO] [stdout] 356 | fn build_user(email: String, username: String) -> User {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `area`
[INFO] [stdout]    --> src/bin.rs:372:4
[INFO] [stdout]     |
[INFO] [stdout] 372 | fn area(rectangle: &Rectangle) -> u32 {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `calculateArea`
[INFO] [stdout]    --> src/bin.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 |     fn calculateArea(&self) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]    --> src/bin.rs:381:8
[INFO] [stdout]     |
[INFO] [stdout] 381 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `square`
[INFO] [stdout]    --> src/bin.rs:386:8
[INFO] [stdout]     |
[INFO] [stdout] 386 |     fn square(size: u32) -> Rectangle {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `structures`
[INFO] [stdout]    --> src/bin.rs:422:4
[INFO] [stdout]     |
[INFO] [stdout] 422 | fn structures() {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> src/bin.rs:478:5
[INFO] [stdout]     |
[INFO] [stdout] 478 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> src/bin.rs:479:5
[INFO] [stdout]     |
[INFO] [stdout] 479 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> src/bin.rs:481:5
[INFO] [stdout]     |
[INFO] [stdout] 481 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]    --> src/bin.rs:483:5
[INFO] [stdout]     |
[INFO] [stdout] 483 |     ChangeColor(i32, i32, i32), //Tuple
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `call`
[INFO] [stdout]    --> src/bin.rs:487:8
[INFO] [stdout]     |
[INFO] [stdout] 487 |     fn call(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]    --> src/bin.rs:494:5
[INFO] [stdout]     |
[INFO] [stdout] 494 |     Alabama,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]    --> src/bin.rs:495:5
[INFO] [stdout]     |
[INFO] [stdout] 495 |     Alaska,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `California`
[INFO] [stdout]    --> src/bin.rs:496:5
[INFO] [stdout]     |
[INFO] [stdout] 496 |     California,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Texas`
[INFO] [stdout]    --> src/bin.rs:497:5
[INFO] [stdout]     |
[INFO] [stdout] 497 |     Texas,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]    --> src/bin.rs:500:6
[INFO] [stdout]     |
[INFO] [stdout] 500 | enum Coin {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value_in_cents`
[INFO] [stdout]    --> src/bin.rs:508:8
[INFO] [stdout]     |
[INFO] [stdout] 508 |     fn value_in_cents(&self) -> u8 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enums`
[INFO] [stdout]    --> src/bin.rs:521:4
[INFO] [stdout]     |
[INFO] [stdout] 521 | fn enums() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `smart_pointers23`
[INFO] [stdout]    --> src/bin.rs:578:4
[INFO] [stdout]     |
[INFO] [stdout] 578 | fn smart_pointers23() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `SkRustLearnBin` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `sk_rust_learn_bin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `calculateArea` should have a snake case name
[INFO] [stdout]    --> src/bin.rs:377:8
[INFO] [stdout]     |
[INFO] [stdout] 377 |     fn calculateArea(&self) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^ help: convert the identifier to snake case: `calculate_area`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 51 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.72s
[INFO] running `Command { std: "docker" "inspect" "397c5853b463b86a5d2c3879eacce01393135a9ed0315e467a15fa5fccd1c258", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "397c5853b463b86a5d2c3879eacce01393135a9ed0315e467a15fa5fccd1c258", kill_on_drop: false }`
[INFO] [stdout] 397c5853b463b86a5d2c3879eacce01393135a9ed0315e467a15fa5fccd1c258