[INFO] updating cached repository benbrunton/rust_minesweeper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/benbrunton/rust_minesweeper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/benbrunton/rust_minesweeper" "work/ex/clippy-test-run/sources/stable/gh/benbrunton/rust_minesweeper"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/benbrunton/rust_minesweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/benbrunton/rust_minesweeper" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/benbrunton/rust_minesweeper"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/benbrunton/rust_minesweeper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7bbc1df016dc749c4e6b7dd1875cc00bca45d9b0
[INFO] sha for GitHub repo benbrunton/rust_minesweeper: 7bbc1df016dc749c4e6b7dd1875cc00bca45d9b0
[INFO] validating manifest of benbrunton/rust_minesweeper 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 benbrunton/rust_minesweeper 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 benbrunton/rust_minesweeper
[INFO] finished frobbing benbrunton/rust_minesweeper
[INFO] frobbed toml for benbrunton/rust_minesweeper written to work/ex/clippy-test-run/sources/stable/gh/benbrunton/rust_minesweeper/Cargo.toml
[INFO] started frobbing benbrunton/rust_minesweeper
[INFO] finished frobbing benbrunton/rust_minesweeper
[INFO] frobbed toml for benbrunton/rust_minesweeper written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/benbrunton/rust_minesweeper/Cargo.toml
[INFO] crate benbrunton/rust_minesweeper 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 benbrunton/rust_minesweeper 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-2/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/benbrunton/rust_minesweeper:/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] 9dd21d22edbba6df8bf786e21d25062c9c917e66d85ac4bf5d31e6de2fda5b79
[INFO] running `"docker" "start" "-a" "9dd21d22edbba6df8bf786e21d25062c9c917e66d85ac4bf5d31e6de2fda5b79"`
[INFO] [stderr]     Checking libc v0.2.9
[INFO] [stderr]     Checking mempool v0.3.1
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking rand v0.3.14
[INFO] [stderr]     Checking aho-corasick v0.5.1
[INFO] [stderr]     Checking regex v0.1.65
[INFO] [stderr]     Checking rust-mines v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/board.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |         write!(f, "{} ", "█")
[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: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/board.rs:91:17
[INFO] [stderr]    |
[INFO] [stderr] 91 |         let _ = write!(f, "\n");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/board.rs:99:21
[INFO] [stderr]    |
[INFO] [stderr] 99 |             let _ = write!(f, "\n");
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/board.rs:162:32
[INFO] [stderr]     |
[INFO] [stderr] 162 |         FieldView{view: tiles, field: field, game_over:false, mines: mines}
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: replace it with: `field`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/board.rs:162:63
[INFO] [stderr]     |
[INFO] [stderr] 162 |         FieldView{view: tiles, field: field, game_over:false, mines: mines}
[INFO] [stderr]     |                                                               ^^^^^^^^^^^^ help: replace it with: `mines`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/board.rs:302:17
[INFO] [stderr]     |
[INFO] [stderr] 302 |         let _ = write!(f, "\n");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/board.rs:318:21
[INFO] [stderr]     |
[INFO] [stderr] 318 |             let _ = write!(f, "\n");
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: literal with an empty format string
[INFO] [stderr]   --> src/board.rs:15:26
[INFO] [stderr]    |
[INFO] [stderr] 15 |         write!(f, "{} ", "█")
[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: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/board.rs:91:17
[INFO] [stderr]    |
[INFO] [stderr] 91 |         let _ = write!(f, "\n");
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::write_with_newline)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]   --> src/board.rs:99:21
[INFO] [stderr]    |
[INFO] [stderr] 99 |             let _ = write!(f, "\n");
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/board.rs:162:32
[INFO] [stderr]     |
[INFO] [stderr] 162 |         FieldView{view: tiles, field: field, game_over:false, mines: mines}
[INFO] [stderr]     |                                ^^^^^^^^^^^^ help: replace it with: `field`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/board.rs:162:63
[INFO] [stderr]     |
[INFO] [stderr] 162 |         FieldView{view: tiles, field: field, game_over:false, mines: mines}
[INFO] [stderr]     |                                                               ^^^^^^^^^^^^ help: replace it with: `mines`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/board.rs:302:17
[INFO] [stderr]     |
[INFO] [stderr] 302 |         let _ = write!(f, "\n");
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: using `write!()` with a format string that ends in a single newline, consider using `writeln!()` instead
[INFO] [stderr]    --> src/board.rs:318:21
[INFO] [stderr]     |
[INFO] [stderr] 318 |             let _ = write!(f, "\n");
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     return 0;
[INFO] [stderr]    |     ^^^^^^^^^ help: remove `return` as shown: `0`
[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/main.rs:56:5
[INFO] [stderr]    |
[INFO] [stderr] 56 |     return 0;
[INFO] [stderr]    |     ^^^^^^^^^ help: remove `return` as shown: `0`
[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: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/board.rs:27:20
[INFO] [stderr]    |
[INFO] [stderr] 27 |           let icon = match self {
[INFO] [stderr]    |  ____________________^
[INFO] [stderr] 28 | |             &TileState::Mine        => "♦".to_string(),
[INFO] [stderr] 29 | |             &TileState::Number(0)   => " ".to_string(),
[INFO] [stderr] 30 | |             &TileState::Number(n)   => n.to_string()
[INFO] [stderr] 31 | |         };
[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: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let icon = match *self {
[INFO] [stderr] 28 |             TileState::Mine        => "♦".to_string(),
[INFO] [stderr] 29 |             TileState::Number(0)   => " ".to_string(),
[INFO] [stderr] 30 |             TileState::Number(n)   => n.to_string()
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/board.rs:50:21
[INFO] [stderr]    |
[INFO] [stderr] 50 |                     rng.choose(&width_range).unwrap().clone(), 
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*rng.choose(&width_range).unwrap()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/board.rs:51:21
[INFO] [stderr]    |
[INFO] [stderr] 51 |                     rng.choose(&height_range).unwrap().clone())
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*rng.choose(&height_range).unwrap()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:100:13
[INFO] [stderr]     |
[INFO] [stderr] 100 |             row_num = row_num + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `row_num += 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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/board.rs:107:23
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn is_mine(positions: &Vec<(u32, u32)>, x: u32, y: u32) -> bool {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^ help: change this to: `&[(u32, u32)]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/board.rs:111:27
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn count_mines(positions: &Vec<(u32, u32)>, x: u32, y: u32) -> u32 {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^ help: change this to: `&[(u32, u32)]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:159:13
[INFO] [stderr]     |
[INFO] [stderr] 159 |             mines = mines + v.iter().filter(|&tile| tile.clone() == TileState::Mine).count();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `mines += v.iter().filter(|&tile| tile.clone() == TileState::Mine).count()`
[INFO] [stderr]     |
[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: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/board.rs:167:9
[INFO] [stderr]     |
[INFO] [stderr] 167 |         self.game_over == false
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!self.game_over`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:286:13
[INFO] [stderr]     |
[INFO] [stderr] 286 |             flags = flags + v.iter().filter(|&tile| tile.clone() == Tile::Flag).count();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `flags += v.iter().filter(|&tile| tile.clone() == Tile::Flag).count()`
[INFO] [stderr]     |
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:316:17
[INFO] [stderr]     |
[INFO] [stderr] 316 |                 col_num = col_num + 1;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `col_num += 1`
[INFO] [stderr]     |
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:319:13
[INFO] [stderr]     |
[INFO] [stderr] 319 |             row_num = row_num + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `row_num += 1`
[INFO] [stderr]     |
[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: you don't need to add `&` to all patterns
[INFO] [stderr]   --> src/board.rs:27:20
[INFO] [stderr]    |
[INFO] [stderr] 27 |           let icon = match self {
[INFO] [stderr]    |  ____________________^
[INFO] [stderr] 28 | |             &TileState::Mine        => "♦".to_string(),
[INFO] [stderr] 29 | |             &TileState::Number(0)   => " ".to_string(),
[INFO] [stderr] 30 | |             &TileState::Number(n)   => n.to_string()
[INFO] [stderr] 31 | |         };
[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: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let icon = match *self {
[INFO] [stderr] 28 |             TileState::Mine        => "♦".to_string(),
[INFO] [stderr] 29 |             TileState::Number(0)   => " ".to_string(),
[INFO] [stderr] 30 |             TileState::Number(n)   => n.to_string()
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/board.rs:50:21
[INFO] [stderr]    |
[INFO] [stderr] 50 |                     rng.choose(&width_range).unwrap().clone(), 
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*rng.choose(&width_range).unwrap()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/board.rs:51:21
[INFO] [stderr]    |
[INFO] [stderr] 51 |                     rng.choose(&height_range).unwrap().clone())
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*rng.choose(&height_range).unwrap()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:100:13
[INFO] [stderr]     |
[INFO] [stderr] 100 |             row_num = row_num + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `row_num += 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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/board.rs:107:23
[INFO] [stderr]     |
[INFO] [stderr] 107 | fn is_mine(positions: &Vec<(u32, u32)>, x: u32, y: u32) -> bool {
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^ help: change this to: `&[(u32, u32)]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/board.rs:111:27
[INFO] [stderr]     |
[INFO] [stderr] 111 | fn count_mines(positions: &Vec<(u32, u32)>, x: u32, y: u32) -> u32 {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^ help: change this to: `&[(u32, u32)]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:159:13
[INFO] [stderr]     |
[INFO] [stderr] 159 |             mines = mines + v.iter().filter(|&tile| tile.clone() == TileState::Mine).count();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `mines += v.iter().filter(|&tile| tile.clone() == TileState::Mine).count()`
[INFO] [stderr]     |
[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: equality checks against false can be replaced by a negation
[INFO] [stderr]    --> src/board.rs:167:9
[INFO] [stderr]     |
[INFO] [stderr] 167 |         self.game_over == false
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^ help: try simplifying it as shown: `!self.game_over`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::bool_comparison)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bool_comparison
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:286:13
[INFO] [stderr]     |
[INFO] [stderr] 286 |             flags = flags + v.iter().filter(|&tile| tile.clone() == Tile::Flag).count();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `flags += v.iter().filter(|&tile| tile.clone() == Tile::Flag).count()`
[INFO] [stderr]     |
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:316:17
[INFO] [stderr]     |
[INFO] [stderr] 316 |                 col_num = col_num + 1;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `col_num += 1`
[INFO] [stderr]     |
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/board.rs:319:13
[INFO] [stderr]     |
[INFO] [stderr] 319 |             row_num = row_num + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `row_num += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.09s
[INFO] running `"docker" "inspect" "9dd21d22edbba6df8bf786e21d25062c9c917e66d85ac4bf5d31e6de2fda5b79"`
[INFO] running `"docker" "rm" "-f" "9dd21d22edbba6df8bf786e21d25062c9c917e66d85ac4bf5d31e6de2fda5b79"`
[INFO] [stdout] 9dd21d22edbba6df8bf786e21d25062c9c917e66d85ac4bf5d31e6de2fda5b79