[INFO] updating cached repository swizzard/rust-mazes
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/swizzard/rust-mazes
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/swizzard/rust-mazes" "work/ex/clippy-test-run/sources/stable/gh/swizzard/rust-mazes"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/swizzard/rust-mazes'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/swizzard/rust-mazes" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/swizzard/rust-mazes"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/swizzard/rust-mazes'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46d2f9f69c6ba91b75dab043e72d95d8953a9c8c
[INFO] sha for GitHub repo swizzard/rust-mazes: 46d2f9f69c6ba91b75dab043e72d95d8953a9c8c
[INFO] validating manifest of swizzard/rust-mazes 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 swizzard/rust-mazes 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 swizzard/rust-mazes
[INFO] finished frobbing swizzard/rust-mazes
[INFO] frobbed toml for swizzard/rust-mazes written to work/ex/clippy-test-run/sources/stable/gh/swizzard/rust-mazes/Cargo.toml
[INFO] started frobbing swizzard/rust-mazes
[INFO] finished frobbing swizzard/rust-mazes
[INFO] frobbed toml for swizzard/rust-mazes written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/swizzard/rust-mazes/Cargo.toml
[INFO] crate swizzard/rust-mazes 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 swizzard/rust-mazes 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-3/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/swizzard/rust-mazes:/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] 18d19bd9f6dae7e46b356006429420212075b60c00c47fe597fda8a70599b273
[INFO] running `"docker" "start" "-a" "18d19bd9f6dae7e46b356006429420212075b60c00c47fe597fda8a70599b273"`
[INFO] [stderr]     Checking mazes v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/cell.rs:29:25
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn get_neighbor(&self, dir: Direction) -> Point {
[INFO] [stderr]    |                         ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/maze.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |             self.row_ctr = self.row_ctr + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.row_ctr += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |             let ref c = self.maze.cells[&p];
[INFO] [stderr]     |             ----^^^^^----------------------- help: try: `let c = &self.maze.cells[&p];`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:153:17
[INFO] [stderr]     |
[INFO] [stderr] 153 |             let ref c = self.maze.cells[&p];
[INFO] [stderr]     |             ----^^^^^----------------------- help: try: `let c = &self.maze.cells[&p];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/maze.rs:217:5
[INFO] [stderr]     |
[INFO] [stderr] 217 | /     fn index<'a>(&'a self, p: Point) -> &'a Cell {
[INFO] [stderr] 218 | |         &self.cells[&p]
[INFO] [stderr] 219 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/maze.rs:223:5
[INFO] [stderr]     |
[INFO] [stderr] 223 | /     fn index_mut<'a>(&'a mut self, p: Point) -> &'a mut Cell {
[INFO] [stderr] 224 | |         self.cells.get_mut(&p).unwrap()
[INFO] [stderr] 225 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/cell.rs:29:25
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn get_neighbor(&self, dir: Direction) -> Point {
[INFO] [stderr]    |                         ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/maze.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |             self.row_ctr = self.row_ctr + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `self.row_ctr += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:112:17
[INFO] [stderr]     |
[INFO] [stderr] 112 |             let ref c = self.maze.cells[&p];
[INFO] [stderr]     |             ----^^^^^----------------------- help: try: `let c = &self.maze.cells[&p];`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:153:17
[INFO] [stderr]     |
[INFO] [stderr] 153 |             let ref c = self.maze.cells[&p];
[INFO] [stderr]     |             ----^^^^^----------------------- help: try: `let c = &self.maze.cells[&p];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/maze.rs:217:5
[INFO] [stderr]     |
[INFO] [stderr] 217 | /     fn index<'a>(&'a self, p: Point) -> &'a Cell {
[INFO] [stderr] 218 | |         &self.cells[&p]
[INFO] [stderr] 219 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/maze.rs:223:5
[INFO] [stderr]     |
[INFO] [stderr] 223 | /     fn index_mut<'a>(&'a mut self, p: Point) -> &'a mut Cell {
[INFO] [stderr] 224 | |         self.cells.get_mut(&p).unwrap()
[INFO] [stderr] 225 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/maze.rs:244:18
[INFO] [stderr]     |
[INFO] [stderr] 244 |         let c1 = maze.cells.get(&p1).unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&maze.cells[&p1]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/maze.rs:245:18
[INFO] [stderr]     |
[INFO] [stderr] 245 |         let c2 = maze.cells.get(&p2).unwrap();
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&maze.cells[&p2]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:255:13
[INFO] [stderr]     |
[INFO] [stderr] 255 |         let ref r0c0 = maze.cells[&Point::new(0, 0)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r0c0 = &maze.cells[&Point::new(0, 0)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:256:13
[INFO] [stderr]     |
[INFO] [stderr] 256 |         let ref r0c1 = maze.cells[&Point::new(0, 1)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r0c1 = &maze.cells[&Point::new(0, 1)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:259:13
[INFO] [stderr]     |
[INFO] [stderr] 259 |         let ref r1c0 = maze.cells[&Point::new(1, 0)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r1c0 = &maze.cells[&Point::new(1, 0)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:260:13
[INFO] [stderr]     |
[INFO] [stderr] 260 |         let ref r1c1 = maze.cells[&Point::new(1, 1)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r1c1 = &maze.cells[&Point::new(1, 1)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/maze.rs:262:16
[INFO] [stderr]     |
[INFO] [stderr] 262 |           if let Some(_) = eri.next() {
[INFO] [stderr]     |  _________-      ^^^^^^^
[INFO] [stderr] 263 | |             panic!("extra row");
[INFO] [stderr] 264 | |         }
[INFO] [stderr]     | |_________- help: try this: `if eri.next().is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:272:13
[INFO] [stderr]     |
[INFO] [stderr] 272 |         let ref r0c0 = maze.cells[&Point::new(0, 0)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r0c0 = &maze.cells[&Point::new(0, 0)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:273:13
[INFO] [stderr]     |
[INFO] [stderr] 273 |         let ref r1c0 = maze.cells[&Point::new(1, 0)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r1c0 = &maze.cells[&Point::new(1, 0)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:276:13
[INFO] [stderr]     |
[INFO] [stderr] 276 |         let ref r0c1 = maze.cells[&Point::new(0, 1)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r0c1 = &maze.cells[&Point::new(0, 1)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:277:13
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let ref r1c1 = maze.cells[&Point::new(1, 1)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r1c1 = &maze.cells[&Point::new(1, 1)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]    --> src/maze.rs:279:16
[INFO] [stderr]     |
[INFO] [stderr] 279 |           if let Some(_) = eci.next() {
[INFO] [stderr]     |  _________-      ^^^^^^^
[INFO] [stderr] 280 | |             panic!("extra row");
[INFO] [stderr] 281 | |         }
[INFO] [stderr]     | |_________- help: try this: `if eci.next().is_some()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:287:13
[INFO] [stderr]     |
[INFO] [stderr] 287 |         let ref r0c0 = maze.cells[&Point::new(0, 0)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r0c0 = &maze.cells[&Point::new(0, 0)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:288:13
[INFO] [stderr]     |
[INFO] [stderr] 288 |         let ref r0c1 = maze.cells[&Point::new(0, 1)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r0c1 = &maze.cells[&Point::new(0, 1)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:289:13
[INFO] [stderr]     |
[INFO] [stderr] 289 |         let ref r1c0 = maze.cells[&Point::new(1, 0)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r1c0 = &maze.cells[&Point::new(1, 0)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/maze.rs:290:13
[INFO] [stderr]     |
[INFO] [stderr] 290 |         let ref r1c1 = maze.cells[&Point::new(1, 1)];
[INFO] [stderr]     |         ----^^^^^^^^--------------------------------- help: try: `let r1c1 = &maze.cells[&Point::new(1, 1)];`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/maze.rs:302:21
[INFO] [stderr]     |
[INFO] [stderr] 302 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/maze.rs:302:21
[INFO] [stderr]     |
[INFO] [stderr] 302 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::absurd_extreme_comparisons)] on by default
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/maze.rs:304:21
[INFO] [stderr]     |
[INFO] [stderr] 304 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/maze.rs:304:21
[INFO] [stderr]     |
[INFO] [stderr] 304 |             assert!(c.loc.column >= 0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `mazes`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "18d19bd9f6dae7e46b356006429420212075b60c00c47fe597fda8a70599b273"`
[INFO] running `"docker" "rm" "-f" "18d19bd9f6dae7e46b356006429420212075b60c00c47fe597fda8a70599b273"`
[INFO] [stdout] 18d19bd9f6dae7e46b356006429420212075b60c00c47fe597fda8a70599b273