Program: 10439
Project: 10439
Buggy source:
@Override public void didChange(final PHChange changeInstance){
  DispatchQueue.getMainQueue().async(new Runnable(){
    @Override public void run(){
      final PHFetchResultChangeDetails collectionChanges=changeInstance.getChangeDetailsForFetchResult(assetsFetchResults);
      if (collectionChanges != null) {
        assetsFetchResults=collectionChanges.getFetchResultAfterChanges();
        final UICollectionView collectionView=getCollectionView();
        if (!collectionChanges.hasIncrementalChanges() || collectionChanges.hasMoves()) {
          collectionView.reloadData();
        }
 else {
          collectionView.performBatchUpdates(new Runnable(){
            @Override public void run(){
              NSIndexSet removedIndexes=collectionChanges.getRemovedIndexes();
              if (removedIndexes != null && removedIndexes.getCount() > 0) {
                collectionView.deleteItems(getIndexPathsFromIndexesWithSection(removedIndexes,0));
              }
              NSIndexSet insertedIndexes=collectionChanges.getInsertedIndexes();
              if (insertedIndexes != null && insertedIndexes.getCount() > 0) {
                collectionView.insertItems(getIndexPathsFromIndexesWithSection(insertedIndexes,0));
              }
              NSIndexSet changedIndexes=collectionChanges.getChangedIndexes();
              if (changedIndexes != null && changedIndexes.getCount() > 0) {
                collectionView.reloadItems(getIndexPathsFromIndexesWithSection(changedIndexes,0));
              }
            }
          }
,null);
        }
      }
      resetCachedAssets();
    }
  }
);
}

Fixed version (ground truth):
@Override public void didChange(final PHChange changeInstance){
  DispatchQueue.getMainQueue().async(new Runnable(){
    @Override public void run(){
      final PHFetchResultChangeDetails collectionChanges=changeInstance.getChangeDetailsForFetchResult(assetsFetchResults);
      if (collectionChanges != null) {
        assetsFetchResults=collectionChanges.getFetchResultAfterChanges();
        final UICollectionView collectionView=getCollectionView();
        if (!collectionChanges.hasIncrementalChanges() || collectionChanges.hasMoves()) {
          collectionView.reloadData();
        }
 else {
          collectionView.performBatchUpdates(new Runnable(){
            @Override public void run(){
              NSIndexSet removedIndexes=collectionChanges.getRemovedIndexes();
              if (removedIndexes != null && removedIndexes.size() > 0) {
                collectionView.deleteItems(getIndexPathsFromIndexesWithSection(removedIndexes,0));
              }
              NSIndexSet insertedIndexes=collectionChanges.getInsertedIndexes();
              if (insertedIndexes != null && insertedIndexes.size() > 0) {
                collectionView.insertItems(getIndexPathsFromIndexesWithSection(insertedIndexes,0));
              }
              NSIndexSet changedIndexes=collectionChanges.getChangedIndexes();
              if (changedIndexes != null && changedIndexes.size() > 0) {
                collectionView.reloadItems(getIndexPathsFromIndexesWithSection(changedIndexes,0));
              }
            }
          }
,null);
        }
      }
      resetCachedAssets();
    }
  }
);
}