Program: 130973
Project: 130973
Buggy source:
@Override public boolean onTouch(final View view,MotionEvent event){
  if (!isTopCard(view)) {
    return false;
  }
  final int X=(int)event.getRawX();
  final int Y=(int)event.getRawY();
  final int action=event.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
{
      mXStart=X;
      mYStart=Y;
      break;
    }
case MotionEvent.ACTION_UP:
  if (mBeingDragged == null) {
    return false;
  }
if (!canAcceptChoice()) {
  requestLayout();
  AnimatorSet set=new AnimatorSet();
  ObjectAnimator yTranslation=ObjectAnimator.ofFloat(mBeingDragged,"String_Node_Str",0);
  ObjectAnimator xTranslation=ObjectAnimator.ofFloat(mBeingDragged,"String_Node_Str",0);
  set.playTogether(xTranslation,yTranslation);
  set.setDuration(100).start();
  set.addListener(new AnimatorListenerAdapter(){
    @Override public void onAnimationEnd(    Animator animation){
      View finalView=mBeingDragged;
      mBeingDragged=null;
      mXDelta=0;
      mYDelta=0;
      mXStart=0;
      mYStart=0;
      requestLayout();
      if (mCardStackListener != null) {
        mCardStackListener.onCancelled(finalView);
      }
    }
  }
);
  ValueAnimator.AnimatorUpdateListener onUpdate=new ValueAnimator.AnimatorUpdateListener(){
    @Override public void onAnimationUpdate(    ValueAnimator animation){
      mXDelta=(int)view.getTranslationX();
      mYDelta=(int)view.getTranslationY();
      requestLayout();
    }
  }
;
  yTranslation.addUpdateListener(onUpdate);
  xTranslation.addUpdateListener(onUpdate);
  set.start();
}
 else {
  final View last=mCards.poll();
  View recycled=getRecycledOrNew();
  if (recycled != null) {
    RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
    params.addRule(RelativeLayout.CENTER_IN_PARENT);
    mCards.offer(recycled);
    addView(recycled,0,params);
  }
  int sign=mXDelta > 0 ? +1 : -1;
  mBeingDragged=null;
  mXDelta=0;
  mYDelta=0;
  mXStart=0;
  mYStart=0;
  ObjectAnimator animation=ObjectAnimator.ofFloat(last,"String_Node_Str",sign * 1000).setDuration(300);
  animation.addListener(new AnimatorListenerAdapter(){
    @Override public void onAnimationEnd(    Animator animation){
      if (mCardStackListener != null) {
        boolean choice=getStackChoice();
        mCardStackListener.onChoiceMade(choice,last);
      }
      recycleView(last);
      final ViewGroup parent=(ViewGroup)view.getParent();
      if (null != parent) {
        parent.removeView(view);
        parent.addView(view,0);
      }
      last.setScaleX(1);
      last.setScaleY(1);
      setTranslationY(0);
      setTranslationX(0);
      requestLayout();
    }
  }
);
  animation.start();
}
break;
case MotionEvent.ACTION_MOVE:
boolean choiceBoolean=getStackChoice();
float progress=getStackProgress();
view.setTranslationX(X - mXStart);
view.setTranslationY(Y - mYStart);
mXDelta=X - mXStart;
mYDelta=Y - mYStart;
mBeingDragged=view;
requestLayout();
if (mCardStackListener != null) {
mCardStackListener.onUpdateProgress(choiceBoolean,progress,mBeingDragged);
}
break;
}
return true;
}

Fixed version (ground truth):
@Override public boolean onTouch(final View view,MotionEvent event){
  if (!isTopCard(view)) {
    return false;
  }
  final int X=(int)event.getRawX();
  final int Y=(int)event.getRawY();
  final int action=event.getAction();
switch (action & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
{
      mXStart=X;
      mYStart=Y;
      break;
    }
case MotionEvent.ACTION_UP:
  if (mBeingDragged == null) {
    return false;
  }
if (!canAcceptChoice()) {
  requestLayout();
  AnimatorSet set=new AnimatorSet();
  ObjectAnimator yTranslation=ObjectAnimator.ofFloat(mBeingDragged,"String_Node_Str",0);
  ObjectAnimator xTranslation=ObjectAnimator.ofFloat(mBeingDragged,"String_Node_Str",0);
  set.playTogether(xTranslation,yTranslation);
  set.setDuration(100).start();
  set.addListener(new AnimatorListenerAdapter(){
    @Override public void onAnimationEnd(    Animator animation){
      View finalView=mBeingDragged;
      mBeingDragged=null;
      mXDelta=0;
      mYDelta=0;
      mXStart=0;
      mYStart=0;
      requestLayout();
      if (mCardStackListener != null) {
        mCardStackListener.onCancelled(finalView);
      }
    }
  }
);
  ValueAnimator.AnimatorUpdateListener onUpdate=new ValueAnimator.AnimatorUpdateListener(){
    @Override public void onAnimationUpdate(    ValueAnimator animation){
      mXDelta=(int)view.getTranslationX();
      mYDelta=(int)view.getTranslationY();
      requestLayout();
    }
  }
;
  yTranslation.addUpdateListener(onUpdate);
  xTranslation.addUpdateListener(onUpdate);
  set.start();
}
 else {
  final View last=mCards.poll();
  View recycled=getRecycledOrNew();
  if (recycled != null) {
    RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
    params.addRule(RelativeLayout.CENTER_IN_PARENT);
    mCards.offer(recycled);
    addView(recycled,0,params);
  }
  int sign=mXDelta > 0 ? +1 : -1;
  final boolean finalChoice=mXDelta > 0;
  mBeingDragged=null;
  mXDelta=0;
  mYDelta=0;
  mXStart=0;
  mYStart=0;
  ObjectAnimator animation=ObjectAnimator.ofFloat(last,"String_Node_Str",sign * 1000).setDuration(300);
  animation.addListener(new AnimatorListenerAdapter(){
    @Override public void onAnimationEnd(    Animator animation){
      if (mCardStackListener != null) {
        boolean choice=finalChoice;
        mCardStackListener.onChoiceMade(choice,last);
      }
      recycleView(last);
      final ViewGroup parent=(ViewGroup)view.getParent();
      if (null != parent) {
        parent.removeView(view);
        parent.addView(view,0);
      }
      last.setScaleX(1);
      last.setScaleY(1);
      setTranslationY(0);
      setTranslationX(0);
      requestLayout();
    }
  }
);
  animation.start();
}
break;
case MotionEvent.ACTION_MOVE:
boolean choiceBoolean=getStackChoice();
float progress=getStackProgress();
view.setTranslationX(X - mXStart);
view.setTranslationY(Y - mYStart);
mXDelta=X - mXStart;
mYDelta=Y - mYStart;
mBeingDragged=view;
requestLayout();
if (mCardStackListener != null) {
mCardStackListener.onUpdateProgress(choiceBoolean,progress,mBeingDragged);
}
break;
}
return true;
}