The cause of the assertion failure at BattleStackAttacked::applyGs "at" was shooting and casting some spell in handleAttackBeforeCasting() and eventually killing the whole stack. Fix: filter dead stacks in the end of handleAttackBeforeCasting().
The cause of the assertion failure at BattleStackAttacked::applyGs "at" was shooting and casting some spell in handleAttackBeforeCasting() and eventually killing the whole stack. Fix: filter dead stacks in the end of handleAttackBeforeCasting().