We can't seem to figure this one out, though I guess the answer is prett simple.
The below code should - in my oppinion - stop counting up my_temp[0] as soon as "t" is pressed. When t is pressed, the entity counter in the F11 debug panel is set back to 0, so the entity IS removed. Still, the function which I passed the entity to keeps running.
I don't understand why I can manipulate inLight fine (inLight.x += time_step; for example) but inLight != NULL never returns 0, even when the entity does no longer exist.
Funny thing: my_temp[0] gets reset to 0 when I press t, but then keeps counting up. it's like the real entity is removed but replaced by some fake entity so the function can keep running?

Code:
var my_temp[9];
FONT* fallbackFont = "Arial#12b"; // truetype font 

PANEL* deb_pan = {
	pos_x = 20;
	pos_y = 300;
	layer = 1200;
	digits = 0,12,8.4,fallbackFont,1,my_temp[0];
}


void runWhileEntity(ENTITY* inLight)
{
	while(inLight != NULL)
	{
		inLight.x += time_step;
		my_temp[0] = inLight.x;
	}
	beep();
	beep();
	beep();
}

void main()
{
	set(deb_pan,SHOW);
	level_load(NULL);
	wait(3);
	
	ENTITY* theEnt;
	theEnt = ent_create(NULL,nullvector,NULL);

	runWhileEntity(theEnt);
	while(key_t == OFF) wait(1);
	ent_remove(theEnt);
}


~"I never let school interfere with my education"~
-Mark Twain