[INFO] updating cached repository IEavan/Connect4-Monte-Carlo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/IEavan/Connect4-Monte-Carlo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/IEavan/Connect4-Monte-Carlo" "work/ex/clippy-test-run/sources/stable/gh/IEavan/Connect4-Monte-Carlo"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/IEavan/Connect4-Monte-Carlo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/IEavan/Connect4-Monte-Carlo" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/IEavan/Connect4-Monte-Carlo"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/IEavan/Connect4-Monte-Carlo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1e120a2b3992e4f68973aa338398c220e7a0bde8
[INFO] sha for GitHub repo IEavan/Connect4-Monte-Carlo: 1e120a2b3992e4f68973aa338398c220e7a0bde8
[INFO] validating manifest of IEavan/Connect4-Monte-Carlo 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 IEavan/Connect4-Monte-Carlo 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 IEavan/Connect4-Monte-Carlo
[INFO] finished frobbing IEavan/Connect4-Monte-Carlo
[INFO] frobbed toml for IEavan/Connect4-Monte-Carlo written to work/ex/clippy-test-run/sources/stable/gh/IEavan/Connect4-Monte-Carlo/Cargo.toml
[INFO] started frobbing IEavan/Connect4-Monte-Carlo
[INFO] finished frobbing IEavan/Connect4-Monte-Carlo
[INFO] frobbed toml for IEavan/Connect4-Monte-Carlo written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/IEavan/Connect4-Monte-Carlo/Cargo.toml
[INFO] crate IEavan/Connect4-Monte-Carlo 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 IEavan/Connect4-Monte-Carlo against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/IEavan/Connect4-Monte-Carlo:/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" "-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] d2ada2df2bb9f48ba4c4662f44fafd4bcce97ab425f5c683e7b8eaeaec0f406e
[INFO] running `"docker" "start" "-a" "d2ada2df2bb9f48ba4c4662f44fafd4bcce97ab425f5c683e7b8eaeaec0f406e"`
[INFO] [stderr]     Checking connect4 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/grid.rs:45:42
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 move_list.push(GameMove {previous: previous, next: next});
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^ help: replace it with: `previous`
[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/grid.rs:45:62
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 move_list.push(GameMove {previous: previous, next: next});
[INFO] [stderr]    |                                                              ^^^^^^^^^^ help: replace it with: `next`
[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: redundant field names in struct initialization
[INFO] [stderr]   --> src/grid.rs:45:42
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 move_list.push(GameMove {previous: previous, next: next});
[INFO] [stderr]    |                                          ^^^^^^^^^^^^^^^^^^ help: replace it with: `previous`
[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/grid.rs:45:62
[INFO] [stderr]    |
[INFO] [stderr] 45 |                 move_list.push(GameMove {previous: previous, next: next});
[INFO] [stderr]    |                                                              ^^^^^^^^^^ help: replace it with: `next`
[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: unneeded return statement
[INFO] [stderr]   --> src/grid.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         return GridState {grid: empty_grid, turn: Player::Yellow, winner: None};
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `GridState {grid: empty_grid, turn: Player::Yellow, winner: None}`
[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: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]   --> src/grid.rs:94:16
[INFO] [stderr]    |
[INFO] [stderr] 94 |             if new_column - i - 1 >= 0 && new_column - i - 1 < 9  { 
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::int_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]    |
[INFO] [stderr] 94 |             if new_column - i > 0 && new_column - i - 1 < 9  { 
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:115:16
[INFO] [stderr]     |
[INFO] [stderr] 115 |             if new_row - i - 1 >= 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 115 |             if new_row - i > 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:128:16
[INFO] [stderr]     |
[INFO] [stderr] 128 |                new_row - i - 1 >= 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 128 |                new_row - i > 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:137:16
[INFO] [stderr]     |
[INFO] [stderr] 137 |             if new_column - i - 1 >= 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 137 |             if new_column - i > 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:160:16
[INFO] [stderr]     |
[INFO] [stderr] 160 |             if new_column - i - 1 >= 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 160 |             if new_column - i > 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:161:16
[INFO] [stderr]     |
[INFO] [stderr] 161 |                new_row - i - 1 >= 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 161 |                new_row - i > 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/grid.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         return GridState {grid: empty_grid, turn: Player::Yellow, winner: None};
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `GridState {grid: empty_grid, turn: Player::Yellow, winner: None}`
[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: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]   --> src/grid.rs:94:16
[INFO] [stderr]    |
[INFO] [stderr] 94 |             if new_column - i - 1 >= 0 && new_column - i - 1 < 9  { 
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::int_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]    |
[INFO] [stderr] 94 |             if new_column - i > 0 && new_column - i - 1 < 9  { 
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:115:16
[INFO] [stderr]     |
[INFO] [stderr] 115 |             if new_row - i - 1 >= 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 115 |             if new_row - i > 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:128:16
[INFO] [stderr]     |
[INFO] [stderr] 128 |                new_row - i - 1 >= 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 128 |                new_row - i > 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:137:16
[INFO] [stderr]     |
[INFO] [stderr] 137 |             if new_column - i - 1 >= 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 137 |             if new_column - i > 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:160:16
[INFO] [stderr]     |
[INFO] [stderr] 160 |             if new_column - i - 1 >= 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 160 |             if new_column - i > 0 && new_column - i - 1 < 9  && 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: Unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stderr]    --> src/grid.rs:161:16
[INFO] [stderr]     |
[INFO] [stderr] 161 |                new_row - i - 1 >= 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stderr] help: change `>= y + 1` to `> y` as shown
[INFO] [stderr]     |
[INFO] [stderr] 161 |                new_row - i > 0 && new_row - i - 1 < 6  { 
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_ok()`
[INFO] [stderr]   --> src/grid.rs:44:20
[INFO] [stderr]    |
[INFO] [stderr] 44 |               if let Ok(_) = next.insert(i) {
[INFO] [stderr]    |  _____________-      ^^^^^
[INFO] [stderr] 45 | |                 move_list.push(GameMove {previous: previous, next: next});
[INFO] [stderr] 46 | |             };
[INFO] [stderr]    | |_____________- help: try this: `if next.insert(i).is_ok()`
[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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/grid.rs:52:16
[INFO] [stderr]    |
[INFO] [stderr] 52 |         if let Some(_) = self.grid[0][column] {return Err("Column is full");}
[INFO] [stderr]    |         -------^^^^^^^------------------------------------------------------- help: try this: `if self.grid[0][column].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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/grid.rs:53:16
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if let Some(_) = self.winner {return Err("Game is over");}
[INFO] [stderr]    |         -------^^^^^^^-------------------------------------------- help: try this: `if self.winner.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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/grid.rs:57:20
[INFO] [stderr]    |
[INFO] [stderr] 57 |               if let Some(_) = self.grid[j][column] {continue;}
[INFO] [stderr]    |  _____________-      ^^^^^^^
[INFO] [stderr] 58 | |             else {
[INFO] [stderr] 59 | |                 free_position = j;
[INFO] [stderr] 60 | |                 break;
[INFO] [stderr] 61 | |             }
[INFO] [stderr]    | |_____________- help: try this: `if self.grid[j][column].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: the function has a cyclomatic complexity of 33
[INFO] [stderr]    --> src/grid.rs:78:5
[INFO] [stderr]     |
[INFO] [stderr] 78  | /     fn check_winner(&self, new_row: i32, new_column: i32) -> bool {
[INFO] [stderr] 79  | |         //TODO: Candidate for macros
[INFO] [stderr] 80  | |         let last_player = self.turn;
[INFO] [stderr] 81  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 171 | |         row_count >= 3 || vert_count >= 3 || rising_count >= 3 || falling_count >= 3
[INFO] [stderr] 172 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/grid.rs:287:22
[INFO] [stderr]     |
[INFO] [stderr] 287 |             for j in 0..9 {
[INFO] [stderr]     |                      ^^^^ help: try replacing the loop by: `new_grid.grid[i][..9].clone_from_slice(&self.grid[i][..9])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::manual_memcpy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/mcts.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 |     if move_list.len() == 0 {panic!("No moves to select best from");}
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `move_list.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/mcts.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |         if moves.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `moves.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_ok()`
[INFO] [stderr]   --> src/grid.rs:44:20
[INFO] [stderr]    |
[INFO] [stderr] 44 |               if let Ok(_) = next.insert(i) {
[INFO] [stderr]    |  _____________-      ^^^^^
[INFO] [stderr] 45 | |                 move_list.push(GameMove {previous: previous, next: next});
[INFO] [stderr] 46 | |             };
[INFO] [stderr]    | |_____________- help: try this: `if next.insert(i).is_ok()`
[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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/grid.rs:52:16
[INFO] [stderr]    |
[INFO] [stderr] 52 |         if let Some(_) = self.grid[0][column] {return Err("Column is full");}
[INFO] [stderr]    |         -------^^^^^^^------------------------------------------------------- help: try this: `if self.grid[0][column].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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/grid.rs:53:16
[INFO] [stderr]    |
[INFO] [stderr] 53 |         if let Some(_) = self.winner {return Err("Game is over");}
[INFO] [stderr]    |         -------^^^^^^^-------------------------------------------- help: try this: `if self.winner.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: redundant pattern matching, consider using `is_some()`
[INFO] [stderr]   --> src/grid.rs:57:20
[INFO] [stderr]    |
[INFO] [stderr] 57 |               if let Some(_) = self.grid[j][column] {continue;}
[INFO] [stderr]    |  _____________-      ^^^^^^^
[INFO] [stderr] 58 | |             else {
[INFO] [stderr] 59 | |                 free_position = j;
[INFO] [stderr] 60 | |                 break;
[INFO] [stderr] 61 | |             }
[INFO] [stderr]    | |_____________- help: try this: `if self.grid[j][column].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: the function has a cyclomatic complexity of 33
[INFO] [stderr]    --> src/grid.rs:78:5
[INFO] [stderr]     |
[INFO] [stderr] 78  | /     fn check_winner(&self, new_row: i32, new_column: i32) -> bool {
[INFO] [stderr] 79  | |         //TODO: Candidate for macros
[INFO] [stderr] 80  | |         let last_player = self.turn;
[INFO] [stderr] 81  | |
[INFO] [stderr] ...   |
[INFO] [stderr] 171 | |         row_count >= 3 || vert_count >= 3 || rising_count >= 3 || falling_count >= 3
[INFO] [stderr] 172 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/grid.rs:287:22
[INFO] [stderr]     |
[INFO] [stderr] 287 |             for j in 0..9 {
[INFO] [stderr]     |                      ^^^^ help: try replacing the loop by: `new_grid.grid[i][..9].clone_from_slice(&self.grid[i][..9])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::manual_memcpy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/mcts.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 |     if move_list.len() == 0 {panic!("No moves to select best from");}
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `move_list.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/mcts.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |         if moves.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `moves.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.08s
[INFO] running `"docker" "inspect" "d2ada2df2bb9f48ba4c4662f44fafd4bcce97ab425f5c683e7b8eaeaec0f406e"`
[INFO] running `"docker" "rm" "-f" "d2ada2df2bb9f48ba4c4662f44fafd4bcce97ab425f5c683e7b8eaeaec0f406e"`
[INFO] [stdout] d2ada2df2bb9f48ba4c4662f44fafd4bcce97ab425f5c683e7b8eaeaec0f406e