AnmationEvent has no receiver! error

I have a GameObject that adds an AnimationEvent to a clip that calls a function at completion of the animation. It calls this function reliably -- until I destroy the game object. I destroy the object when I detect a collision and I am careful to call Animation.Stop() before I destroy the object, so the end function callback should not be called, but appears to be. My worry is that Unity might still try to call the function even if I stop the animation early, but by that time the object is gone.

The relevant code:

 function BeginIdleAnimation() {
     if (idleAnimation) {
         var repeat : boolean = idleAnimation.wrapMode == WrapMode.Loop 
             || idleAnimation.wrapMode == WrapMode.PingPong;
         PlayAnimationClip(idleAnimation, repeat ? "IdleAnimDone" : null);
         PlayClip(idleSound);
     }
 }
 
 function PlayAnimationClip(clip : AnimationClip, endFunc : String) {
     if (clip) {
         // create event that calls desired endFunc when animation completes
          if (endFunc) {
              var event : AnimationEvent = new AnimationEvent();
               event.functionName = endFunc;
               event.time = clip.length; 
                clip.AddEvent(event);
            }
         animation.clip = clip;
         animation.Play();
     }
 }
 
 // Here's the relevant snippet of collision code that supposedly stops the animation before destroying itself...
 
 function OnCollision(p : Projectile) {
     if (p) {
         animation.Stop();
         Destroy(transform.parent.gameObject);
     }
 }
 
 function IdleAnimDone() {
     PlayClip(idleSound);
 }
 

I get "AnimationEvent 'IdleAnimDone' has no receiver!" error.

Thanks in advance!