Problem in get_block_probs with Skill Side_Step

[Drefsante]

In game::get_block_probs we have:

push_squares = self.get_push_squares(attacker.position, defender.position)
crowd_push = self.arena.board[push_squares[0].y][push_squares[0].x] == Tile.CROWD and not defender.has_skill(Skill.STAND_FIRM)

But push_squares can be empty because in method get_push_squares we have:

if defender.has_skill(Skill.SIDE_STEP) and not attacker.has_skill(Skill.GRAB):
     return self.get_adjacent_squares(to_position, out=True, occupied=False)

If defender has Side_Step and is surrounded by other units on each adjacent square, there is no empty square to return and push_squares is then empty -> we get an exception when calculating crowd_push due to push_squares[0].