Program: 10454
Project: 10454
Buggy source:
/** 
 * Bounce the placard back to the center. 
 */
private void animatePlacardViewToCenter(){
  CALayer welcomeLayer=placardView.getLayer();
  CAKeyframeAnimation bounceAnimation=CAKeyframeAnimation.create("String_Node_Str");
  bounceAnimation.setRemovedOnCompletion(false);
  double animationDuration=1.5;
  UIBezierPath bouncePath=new UIBezierPath();
  CGPoint centerPoint=getCenter();
  double midX=centerPoint.getX();
  double midY=centerPoint.getY();
  double originalOffsetX=placardView.getCenter().getX() - midX;
  double originalOffsetY=placardView.getCenter().getY() - midY;
  double offsetDivider=4;
  boolean stopBouncing=false;
  bouncePath.move(new CGPoint(placardView.getCenter().getX(),placardView.getCenter().getY()));
  bouncePath.addLine(new CGPoint(midX,midY));
  while (!stopBouncing) {
    CGPoint excursion=new CGPoint(midX + originalOffsetX / offsetDivider,midY + originalOffsetY / offsetDivider);
    bouncePath.addLine(excursion);
    bouncePath.addLine(centerPoint);
    offsetDivider+=4;
    animationDuration+=1 / offsetDivider;
    if (Math.abs(originalOffsetX / offsetDivider) < 6 && Math.abs(originalOffsetY / offsetDivider) < 6) {
      stopBouncing=true;
    }
  }
  bounceAnimation.setPath(bouncePath.getCGPath());
  bounceAnimation.setDuration(animationDuration);
  CABasicAnimation transformAnimation=CABasicAnimation.create("String_Node_Str");
  transformAnimation.setRemovedOnCompletion(true);
  transformAnimation.setDuration(animationDuration);
  transformAnimation.setToValue(NSValue.valueOf(CoreAnimation.Transform3DIdentity()));
  CAAnimationGroup group=new CAAnimationGroup();
  group.setDelegate(new CAAnimationDelegateAdapter(){
    /** 
 * Animation delegate method called when the animation's finished: restore the transform and reenable user interaction. 
 */
    @Override public void didStop(    CAAnimation anim,    boolean flag){
      placardView.setTransform(CGAffineTransform.Identity());
      setUserInteractionEnabled(true);
    }
  }
);
  group.setDuration(animationDuration);
  group.setTimingFunction(CAMediaTimingFunction.create(CoreAnimation.MediaTimingFunctionEaseIn()));
  group.setAnimations(new NSArray<CAAnimation>(bounceAnimation,transformAnimation));
  welcomeLayer.addAnimation(group,"String_Node_Str");
  placardView.setCenter(centerPoint);
  placardView.setTransform(CGAffineTransform.Identity());
}

Fixed version (ground truth):
/** 
 * Bounce the placard back to the center. 
 */
private void animatePlacardViewToCenter(){
  CALayer welcomeLayer=placardView.getLayer();
  CAKeyframeAnimation bounceAnimation=CAKeyframeAnimation.create("String_Node_Str");
  bounceAnimation.setRemovedOnCompletion(false);
  double animationDuration=1.5;
  UIBezierPath bouncePath=new UIBezierPath();
  CGPoint centerPoint=getCenter();
  double midX=centerPoint.getX();
  double midY=centerPoint.getY();
  double originalOffsetX=placardView.getCenter().getX() - midX;
  double originalOffsetY=placardView.getCenter().getY() - midY;
  double offsetDivider=4;
  boolean stopBouncing=false;
  bouncePath.move(new CGPoint(placardView.getCenter().getX(),placardView.getCenter().getY()));
  bouncePath.addLine(new CGPoint(midX,midY));
  while (!stopBouncing) {
    CGPoint excursion=new CGPoint(midX + originalOffsetX / offsetDivider,midY + originalOffsetY / offsetDivider);
    bouncePath.addLine(excursion);
    bouncePath.addLine(centerPoint);
    offsetDivider+=4;
    animationDuration+=1 / offsetDivider;
    if (Math.abs(originalOffsetX / offsetDivider) < 6 && Math.abs(originalOffsetY / offsetDivider) < 6) {
      stopBouncing=true;
    }
  }
  bounceAnimation.setPath(bouncePath.getCGPath());
  bounceAnimation.setDuration(animationDuration);
  CABasicAnimation transformAnimation=CABasicAnimation.create("String_Node_Str");
  transformAnimation.setRemovedOnCompletion(true);
  transformAnimation.setDuration(animationDuration);
  transformAnimation.setToValue(NSValue.valueOf(CATransform3D.Identity()));
  CAAnimationGroup group=new CAAnimationGroup();
  group.setDelegate(new CAAnimationDelegateAdapter(){
    /** 
 * Animation delegate method called when the animation's finished: restore the transform and reenable user interaction. 
 */
    @Override public void didStop(    CAAnimation anim,    boolean flag){
      placardView.setTransform(CGAffineTransform.Identity());
      setUserInteractionEnabled(true);
    }
  }
);
  group.setDuration(animationDuration);
  group.setTimingFunction(CAMediaTimingFunction.create(CAMediaTimingFunctionName.EaseIn));
  group.setAnimations(new NSArray<CAAnimation>(bounceAnimation,transformAnimation));
  welcomeLayer.addAnimation(group,"String_Node_Str");
  placardView.setCenter(centerPoint);
  placardView.setTransform(CGAffineTransform.Identity());
}