Why cannot run empty Vector<FiniteTimeAction*> sequence?

cocos2d-x
1 
Vector<FiniteTimeAction*> list;
for(int index : this->myDataList){
    list.pushBack(something);
}
runAction(Sequence::create(list));

I found if nothing added to list, it will crash, why cocos2d not ignore running empty action?

2

Sequence::create(emptyVector); returns nullptr and runAction eventually runs this code action->startWithTarget and so the engine developers decided to not allow null actions.

I’m not sure if the engine developers should consider refactoring some classes to use the null object pattern.