As3: _root.removeChild(this) not working with array IN SPECIFIC CASES? - actionscript-3

Question

I have a class for a ninja star.
In the loop function, I have:
private function loop (event:Event):void
{
trace(this);
for (var i:int=0; i<_root.guardArray.length; i++)
{
//if movieClip at position [i] (enemy) hits this
if (_root.guardArray[i].hitTestObject(this))
{
if(this.hitTestObject(_root.guardArray[i].hitbox))
{
_root.guardArray[i].killThis();
_root.removeChild(this);
removeEventListener(Event.ENTER_FRAME, loop);
}
}
}
y-=Math.cos(rotation/-180*Math.PI)*(ninjaStarSpeed);
x-=Math.sin(rotation/-180*Math.PI)*(ninjaStarSpeed);
if(this.x < 0 || this.x > _root.stagewidth || this.y > _root.stageheight || this.y < 0)
{
_root.removeChild(this);
removeEventListener(Event.ENTER_FRAME, loop);
}
}
}
The ninja star removes itself successfully without any errors when it goes out of the screen.
HOWEVER, when it hits a guard, it removes itself but gives me a #2025 error # line 40!
This is line 40: _root.removeChild(this); - it's part of the array collision checking.
Is flash bugged out or am I doing something VERY wrong?

Answer 1

Yep, you are doing something wrong, because of Error ;)
Code snippet for you:
private function safeRemove():void{
if(this.parent != null){
this.parent.removeChild(this);
}
}
Add this method to the NinjaStar class, and use it. So 40-th line of code will look like
//And don't forget not only kill guard, but also clear reference on him from the guardArray.
_root.guardArray[i].killThis();
safeRemove();
removeEventListener(Event.ENTER_FRAME, loop);