Schedule causing crash?

I have a poison spell that applies damage every couple seconds. Currently I schedule a function that applies damage several times. But when I die from the damage, the game does a weird freeze then crashes. Can you not die with functions scheduled or the game crashes? Is the schedule what's even causing the crash? This is my code, if anyone has an idea of what is going wrong or a better way to go about this, your thoughts would be greatly appreciated.

%times = 5;
%amount = 5;
for(%index = 0; %index < %times; %index++)
{
	%this.schedule(2000 * %index, poison, %amount);
}

function Player::poison(%this, %amount)
{
	if(%this.getDamageLevel() <= 0) {
		return;
		}  // this isn't helping
	if(%this.getDamageLevel() != 0) {
		%this.applyDamage(%amount);
			
	}
	
}