[INFO] updating cached repository serayuzgur/chainake
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/serayuzgur/chainake
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/serayuzgur/chainake" "work/ex/clippy-test-run/sources/stable/gh/serayuzgur/chainake"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/serayuzgur/chainake'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/serayuzgur/chainake" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/serayuzgur/chainake"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/serayuzgur/chainake'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c5693bc2e3c41494c0b1c603737e0bf6a9e65787
[INFO] sha for GitHub repo serayuzgur/chainake: c5693bc2e3c41494c0b1c603737e0bf6a9e65787
[INFO] validating manifest of serayuzgur/chainake on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of serayuzgur/chainake on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing serayuzgur/chainake
[INFO] finished frobbing serayuzgur/chainake
[INFO] frobbed toml for serayuzgur/chainake written to work/ex/clippy-test-run/sources/stable/gh/serayuzgur/chainake/Cargo.toml
[INFO] started frobbing serayuzgur/chainake
[INFO] finished frobbing serayuzgur/chainake
[INFO] frobbed toml for serayuzgur/chainake written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/serayuzgur/chainake/Cargo.toml
[INFO] crate serayuzgur/chainake has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting serayuzgur/chainake against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/serayuzgur/chainake:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dclippy::into_iter_on_array" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fdf8cc3702fb5e45bda350cd1a25fde8f839c8f6b54d733f6292497a1384d045
[INFO] running `"docker" "start" "-a" "fdf8cc3702fb5e45bda350cd1a25fde8f839c8f6b54d733f6292497a1384d045"`
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking chainake v0.0.1-alpha.1 (/opt/crater/workdir)
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/apple.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |                     ' '
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_literal
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/apple.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |                     ' '
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/snake.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     return vec.last().unwrap().clone();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `vec.last().unwrap().clone()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/snake.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         return last.x == x && last.y == y;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `last.x == x && last.y == y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/snake.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |         return last.x == x_min || last.x == x_max || last.y == y_min || last.y == y_max;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `last.x == x_min || last.x == x_max || last.y == y_min || last.y == y_max`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `difficulty`
[INFO] [stderr]   --> src/main.rs:29:25
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn play( &mut self, difficulty: usize) {
[INFO] [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]   --> src/snake.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 | /         match &self.direction {
[INFO] [stderr] 66 | |             &Direction::UP => {
[INFO] [stderr] 67 | |                 next.y = last.y.saturating_sub(1);
[INFO] [stderr] 68 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 77 | |             }
[INFO] [stderr] 78 | |         };
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 65 |         match self.direction {
[INFO] [stderr] 66 |             Direction::UP => {
[INFO] [stderr] 67 |                 next.y = last.y.saturating_sub(1);
[INFO] [stderr] 68 |             }
[INFO] [stderr] 69 |             Direction::RIGHT => {
[INFO] [stderr] 70 |                 next.x = last.x.saturating_add(1);
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]   --> src/snake.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         &body.push(next.clone());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `body.push(next.clone());`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_operation)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]   --> src/snake.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             &self.ghost.push(deleted.clone());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.ghost.push(deleted.clone());`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]   --> src/snake.rs:90:25
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub fn is_colliding(&mut self, x_min: u16, y_min: u16, x_max: u16, y_max: u16) -> bool {
[INFO] [stderr]    |                         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/snake.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |         &self.ghost.clear();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.ghost.clear();`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/apple.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 | /         match &self.ghost {
[INFO] [stderr] 60 | |             Some(ghost) => {
[INFO] [stderr] 61 | |                 write!(
[INFO] [stderr] 62 | |                     stdout,
[INFO] [stderr] ...  |
[INFO] [stderr] 68 | |             _=>{}
[INFO] [stderr] 69 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 59 |         if let Some(ghost) = &self.ghost {
[INFO] [stderr] 60 |     write!(
[INFO] [stderr] 61 |         stdout,
[INFO] [stderr] 62 |         "{}{}",
[INFO] [stderr] 63 |         cursor::Goto(ghost.x, ghost.y),
[INFO] [stderr] 64 |         ' '
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |         stdout.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:53:21
[INFO] [stderr]    |
[INFO] [stderr] 53 | /                     match buf.get(0).unwrap() {
[INFO] [stderr] 54 | |                         //113=q 27 starting of arrow and esc keys
[INFO] [stderr] 55 | |                         &113 | &27 => {
[INFO] [stderr] 56 | |                             match buf.get(1).unwrap() {
[INFO] [stderr] ...  |
[INFO] [stderr] 90 | |                         }
[INFO] [stderr] 91 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 53 |                     match *buf.get(0).unwrap() {
[INFO] [stderr] 54 |                         //113=q 27 starting of arrow and esc keys
[INFO] [stderr] 55 |                         113 | 27 => {
[INFO] [stderr] 56 |                             match buf.get(1).unwrap() {
[INFO] [stderr] 57 |                                 &91 => {
[INFO] [stderr] 58 |                                     match buf.get(2).unwrap() {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:56:29
[INFO] [stderr]    |
[INFO] [stderr] 56 | /                             match buf.get(1).unwrap() {
[INFO] [stderr] 57 | |                                 &91 => {
[INFO] [stderr] 58 | |                                     match buf.get(2).unwrap() {
[INFO] [stderr] 59 | |                                         /*TOP*/
[INFO] [stderr] ...  |
[INFO] [stderr] 73 | |                                 _ => {}
[INFO] [stderr] 74 | |                             }
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 56 |                             match *buf.get(1).unwrap() {
[INFO] [stderr] 57 |                                 91 => {
[INFO] [stderr] 58 |                                     match buf.get(2).unwrap() {
[INFO] [stderr] 59 |                                         /*TOP*/
[INFO] [stderr] 60 |                                         &65 => self.snake.set_direction(snake::Direction::UP),
[INFO] [stderr] 61 |                                         /*BOTTOM*/
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:58:37
[INFO] [stderr]    |
[INFO] [stderr] 58 | /                                     match buf.get(2).unwrap() {
[INFO] [stderr] 59 | |                                         /*TOP*/
[INFO] [stderr] 60 | |                                         &65 => self.snake.set_direction(snake::Direction::UP),
[INFO] [stderr] 61 | |                                         /*BOTTOM*/
[INFO] [stderr] ...  |
[INFO] [stderr] 67 | |                                         _ => {}
[INFO] [stderr] 68 | |                                     }
[INFO] [stderr]    | |_____________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 58 |                                     match *buf.get(2).unwrap() {
[INFO] [stderr] 59 |                                         /*TOP*/
[INFO] [stderr] 60 |                                         65 => self.snake.set_direction(snake::Direction::UP),
[INFO] [stderr] 61 |                                         /*BOTTOM*/
[INFO] [stderr] 62 |                                         66 => self.snake.set_direction(snake::Direction::DOWN),
[INFO] [stderr] 63 |                                         /*RIGHT*/
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/main.rs:103:17
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 &self.snake.move_1(true);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.snake.move_1(true);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/main.rs:105:17
[INFO] [stderr]     |
[INFO] [stderr] 105 |                 &self.snake.move_1(false);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.snake.move_1(false);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/main.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 |             &self.draw(true);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^ help: replace it with: `self.draw(true);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/snake.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     return vec.last().unwrap().clone();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `vec.last().unwrap().clone()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/snake.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         return last.x == x && last.y == y;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `last.x == x && last.y == y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/snake.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 93 |         return last.x == x_min || last.x == x_max || last.y == y_min || last.y == y_max;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `last.x == x_min || last.x == x_max || last.y == y_min || last.y == y_max`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `difficulty`
[INFO] [stderr]   --> src/main.rs:29:25
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn play( &mut self, difficulty: usize) {
[INFO] [stderr]    |                         ^^^^^^^^^^ help: consider using `_difficulty` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to both the expression and the patterns
[INFO] [stderr]   --> src/snake.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 | /         match &self.direction {
[INFO] [stderr] 66 | |             &Direction::UP => {
[INFO] [stderr] 67 | |                 next.y = last.y.saturating_sub(1);
[INFO] [stderr] 68 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 77 | |             }
[INFO] [stderr] 78 | |         };
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 65 |         match self.direction {
[INFO] [stderr] 66 |             Direction::UP => {
[INFO] [stderr] 67 |                 next.y = last.y.saturating_sub(1);
[INFO] [stderr] 68 |             }
[INFO] [stderr] 69 |             Direction::RIGHT => {
[INFO] [stderr] 70 |                 next.x = last.x.saturating_add(1);
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]   --> src/snake.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         &body.push(next.clone());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `body.push(next.clone());`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_operation)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]   --> src/snake.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             &self.ghost.push(deleted.clone());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.ghost.push(deleted.clone());`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]   --> src/snake.rs:90:25
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub fn is_colliding(&mut self, x_min: u16, y_min: u16, x_max: u16, y_max: u16) -> bool {
[INFO] [stderr]    |                         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/snake.rs:107:9
[INFO] [stderr]     |
[INFO] [stderr] 107 |         &self.ghost.clear();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.ghost.clear();`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/apple.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 | /         match &self.ghost {
[INFO] [stderr] 60 | |             Some(ghost) => {
[INFO] [stderr] 61 | |                 write!(
[INFO] [stderr] 62 | |                     stdout,
[INFO] [stderr] ...  |
[INFO] [stderr] 68 | |             _=>{}
[INFO] [stderr] 69 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 59 |         if let Some(ghost) = &self.ghost {
[INFO] [stderr] 60 |     write!(
[INFO] [stderr] 61 |         stdout,
[INFO] [stderr] 62 |         "{}{}",
[INFO] [stderr] 63 |         cursor::Goto(ghost.x, ghost.y),
[INFO] [stderr] 64 |         ' '
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |         stdout.flush();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:53:21
[INFO] [stderr]    |
[INFO] [stderr] 53 | /                     match buf.get(0).unwrap() {
[INFO] [stderr] 54 | |                         //113=q 27 starting of arrow and esc keys
[INFO] [stderr] 55 | |                         &113 | &27 => {
[INFO] [stderr] 56 | |                             match buf.get(1).unwrap() {
[INFO] [stderr] ...  |
[INFO] [stderr] 90 | |                         }
[INFO] [stderr] 91 | |                     }
[INFO] [stderr]    | |_____________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 53 |                     match *buf.get(0).unwrap() {
[INFO] [stderr] 54 |                         //113=q 27 starting of arrow and esc keys
[INFO] [stderr] 55 |                         113 | 27 => {
[INFO] [stderr] 56 |                             match buf.get(1).unwrap() {
[INFO] [stderr] 57 |                                 &91 => {
[INFO] [stderr] 58 |                                     match buf.get(2).unwrap() {
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:56:29
[INFO] [stderr]    |
[INFO] [stderr] 56 | /                             match buf.get(1).unwrap() {
[INFO] [stderr] 57 | |                                 &91 => {
[INFO] [stderr] 58 | |                                     match buf.get(2).unwrap() {
[INFO] [stderr] 59 | |                                         /*TOP*/
[INFO] [stderr] ...  |
[INFO] [stderr] 73 | |                                 _ => {}
[INFO] [stderr] 74 | |                             }
[INFO] [stderr]    | |_____________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 56 |                             match *buf.get(1).unwrap() {
[INFO] [stderr] 57 |                                 91 => {
[INFO] [stderr] 58 |                                     match buf.get(2).unwrap() {
[INFO] [stderr] 59 |                                         /*TOP*/
[INFO] [stderr] 60 |                                         &65 => self.snake.set_direction(snake::Direction::UP),
[INFO] [stderr] 61 |                                         /*BOTTOM*/
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/main.rs:58:37
[INFO] [stderr]    |
[INFO] [stderr] 58 | /                                     match buf.get(2).unwrap() {
[INFO] [stderr] 59 | |                                         /*TOP*/
[INFO] [stderr] 60 | |                                         &65 => self.snake.set_direction(snake::Direction::UP),
[INFO] [stderr] 61 | |                                         /*BOTTOM*/
[INFO] [stderr] ...  |
[INFO] [stderr] 67 | |                                         _ => {}
[INFO] [stderr] 68 | |                                     }
[INFO] [stderr]    | |_____________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 58 |                                     match *buf.get(2).unwrap() {
[INFO] [stderr] 59 |                                         /*TOP*/
[INFO] [stderr] 60 |                                         65 => self.snake.set_direction(snake::Direction::UP),
[INFO] [stderr] 61 |                                         /*BOTTOM*/
[INFO] [stderr] 62 |                                         66 => self.snake.set_direction(snake::Direction::DOWN),
[INFO] [stderr] 63 |                                         /*RIGHT*/
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/main.rs:103:17
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 &self.snake.move_1(true);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.snake.move_1(true);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/main.rs:105:17
[INFO] [stderr]     |
[INFO] [stderr] 105 |                 &self.snake.move_1(false);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.snake.move_1(false);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr] warning: statement can be reduced
[INFO] [stderr]    --> src/main.rs:107:13
[INFO] [stderr]     |
[INFO] [stderr] 107 |             &self.draw(true);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^ help: replace it with: `self.draw(true);`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `"docker" "inspect" "fdf8cc3702fb5e45bda350cd1a25fde8f839c8f6b54d733f6292497a1384d045"`
[INFO] running `"docker" "rm" "-f" "fdf8cc3702fb5e45bda350cd1a25fde8f839c8f6b54d733f6292497a1384d045"`
[INFO] [stdout] fdf8cc3702fb5e45bda350cd1a25fde8f839c8f6b54d733f6292497a1384d045