Small bug

tetros/src/game/board.rs

@@ -97,12 +97,28 @@ impl TetrisBoard {
 	/// Get the value of the cell at the given position.
 	/// Returns [`None`] if (x, y) exceeds the board's bounds.
 	pub fn get_cell(&self, x: usize, y: usize) -> Option<&TetrisCell> {
+		if y >= TetrisBoard::BOARD_HEIGHT {
+			return None;
+		}
+
+		if x >= TetrisBoard::BOARD_WIDTH {
+			return None;
+		}
+
 		return self.board.get(y * TetrisBoard::BOARD_WIDTH + x);
 	}
 
 	/// Get a mutable reference to the cell at the given position.
 	/// Returns [`None`] if (x, y) exceeds the board's bounds.
 	pub fn get_cell_mut(&mut self, x: usize, y: usize) -> Option<&mut TetrisCell> {
+		if y >= TetrisBoard::BOARD_HEIGHT {
+			return None;
+		}
+
+		if x >= TetrisBoard::BOARD_WIDTH {
+			return None;
+		}
+
 		return self.board.get_mut(y * TetrisBoard::BOARD_WIDTH + x);
 	}
 }