Program: 26166
Project: 26166
Buggy source:
public void ReloadAdapter(){
  SharedPreferences mPrefs=PreferenceManager.getDefaultSharedPreferences(mContext);
  showOnlyUnread=mPrefs.getBoolean(SettingsActivity.CB_SHOWONLYUNREAD_STRING,false);
  mCategoriesArrayListAsync=new ArrayList<>();
  mCategoriesArrayListAsync.add(new FolderSubscribtionItem(mContext.getString(R.string.allUnreadFeeds),null,ALL_UNREAD_ITEMS.getValue()));
  mCategoriesArrayListAsync.add(new FolderSubscribtionItem(mContext.getString(R.string.starredFeeds),null,ALL_STARRED_ITEMS.getValue()));
  List<Folder> folderList;
  if (showOnlyUnread)   folderList=dbConn.getListOfFoldersWithUnreadItems();
 else   folderList=dbConn.getListOfFolders();
  for (  Folder folder : folderList) {
    mCategoriesArrayListAsync.add(new FolderSubscribtionItem(folder.getLabel(),null,folder.getId()));
  }
  for (  Feed feed : dbConn.getListOfFeedsWithoutFolders(showOnlyUnread)) {
    mCategoriesArrayListAsync.add(new ConcreteFeedItem(feed.getFeedTitle(),(long)ITEMS_WITHOUT_FOLDER.getValue(),feed.getId(),feed.getFaviconUrl(),feed.getId()));
  }
  mItemsArrayListAsync=new SparseArray<>();
  for (int groupPosition=0; groupPosition < mCategoriesArrayListAsync.size(); groupPosition++) {
    int parent_id=(int)mCategoriesArrayListAsync.get(groupPosition).id_database;
    mItemsArrayListAsync.append(parent_id,new SparseArray<ConcreteFeedItem>());
    int childPosTemp=0;
    List<Feed> feedItemList=null;
    if (parent_id == ALL_UNREAD_ITEMS.getValue()) {
      feedItemList=dbConn.getAllFeedsWithUnreadRssItems();
    }
 else     if (parent_id == ALL_STARRED_ITEMS.getValue()) {
      feedItemList=dbConn.getAllFeedsWithStarredRssItems();
    }
 else {
      for (      Folder folder : folderList) {
        if (folder.getId() == parent_id) {
          feedItemList=dbConn.getAllFeedsWithUnreadRssItemsForFolder(folder.getId(),showOnlyUnread);
          break;
        }
      }
    }
    if (feedItemList != null) {
      for (      Feed feed : feedItemList) {
        ConcreteFeedItem newItem=new ConcreteFeedItem(feed.getFeedTitle(),(long)parent_id,feed.getId(),feed.getFaviconUrl(),feed.getId());
        mItemsArrayListAsync.get(parent_id).put(childPosTemp,newItem);
        childPosTemp++;
      }
    }
  }
}

Fixed version (ground truth):
public Tuple<ArrayList<AbstractItem>,SparseArray<SparseArray<ConcreteFeedItem>>> ReloadAdapter(){
  SharedPreferences mPrefs=PreferenceManager.getDefaultSharedPreferences(mContext);
  showOnlyUnread=mPrefs.getBoolean(SettingsActivity.CB_SHOWONLYUNREAD_STRING,false);
  ArrayList<AbstractItem> mCategoriesArrayListAsync=new ArrayList<>();
  mCategoriesArrayListAsync.add(new FolderSubscribtionItem(mContext.getString(R.string.allUnreadFeeds),null,ALL_UNREAD_ITEMS.getValue()));
  mCategoriesArrayListAsync.add(new FolderSubscribtionItem(mContext.getString(R.string.starredFeeds),null,ALL_STARRED_ITEMS.getValue()));
  List<Folder> folderList;
  if (showOnlyUnread) {
    folderList=dbConn.getListOfFoldersWithUnreadItems();
  }
 else {
    folderList=dbConn.getListOfFolders();
  }
  for (  Folder folder : folderList) {
    mCategoriesArrayListAsync.add(new FolderSubscribtionItem(folder.getLabel(),null,folder.getId()));
  }
  for (  Feed feed : dbConn.getListOfFeedsWithoutFolders(showOnlyUnread)) {
    mCategoriesArrayListAsync.add(new ConcreteFeedItem(feed.getFeedTitle(),(long)ITEMS_WITHOUT_FOLDER.getValue(),feed.getId(),feed.getFaviconUrl(),feed.getId()));
  }
  SparseArray<SparseArray<ConcreteFeedItem>> mItemsArrayListAsync=new SparseArray<>();
  for (int groupPosition=0; groupPosition < mCategoriesArrayListAsync.size(); groupPosition++) {
    int parent_id=(int)mCategoriesArrayListAsync.get(groupPosition).id_database;
    mItemsArrayListAsync.append(parent_id,new SparseArray<ConcreteFeedItem>());
    int childPosTemp=0;
    List<Feed> feedItemList=null;
    if (parent_id == ALL_UNREAD_ITEMS.getValue()) {
      feedItemList=dbConn.getAllFeedsWithUnreadRssItems();
    }
 else     if (parent_id == ALL_STARRED_ITEMS.getValue()) {
      feedItemList=dbConn.getAllFeedsWithStarredRssItems();
    }
 else {
      for (      Folder folder : folderList) {
        if (folder.getId() == parent_id) {
          feedItemList=dbConn.getAllFeedsWithUnreadRssItemsForFolder(folder.getId(),showOnlyUnread);
          break;
        }
      }
    }
    if (feedItemList != null) {
      for (      Feed feed : feedItemList) {
        ConcreteFeedItem newItem=new ConcreteFeedItem(feed.getFeedTitle(),(long)parent_id,feed.getId(),feed.getFaviconUrl(),feed.getId());
        mItemsArrayListAsync.get(parent_id).put(childPosTemp,newItem);
        childPosTemp++;
      }
    }
  }
  return new Tuple<>(mCategoriesArrayListAsync,mItemsArrayListAsync);
}