Why would this crash Graal?

[ChibiChibiLuc]

Alright, I've got this in a gani. It shows fading numbers.
When the gani shows, Graal takes a fit, gives me an error, and then says it has an error and crashes.
I'm using Graal v3, of course, and Gscript2.

NPC Code:

---

function onCreated() {

  timeout = .05;

  this.fade = 2;

}

function onTimeout() {

  timeout = .05;

  this.y -= .1;

  this.fade -= .1;

  showtext(5,x+(20/16),y+this.y,"Times New Roman","b","Oh my");

  changeimgcolors(5,#p(1),#p(2),#p(3),this.fade);

}

---