Program: 15428
Project: 15428
Buggy source:
@Override public void onJsonParseStarted(JsonValue result,long timestamp,UUID session,boolean fromCache){
  try {
    final HashSet<String> output=new HashSet<String>();
    final ArrayList<RedditSubreddit> toWrite=new ArrayList<RedditSubreddit>();
    final JsonBufferedObject redditListing=result.asObject().getObject("String_Node_Str");
    final JsonBufferedArray subreddits=redditListing.getArray("String_Node_Str");
    final JsonBuffered.Status joinStatus=subreddits.join();
    if (joinStatus == JsonBuffered.Status.FAILED) {
      handler.onRequestFailed(new SubredditRequestFailure(RequestFailureType.PARSE,null,null,"String_Node_Str",url.toString()));
      return;
    }
    if (type == RedditSubredditManager.SubredditListType.SUBSCRIBED && subreddits.getCurrentItemCount() == 0) {
      doSubredditListRequest(RedditSubredditManager.SubredditListType.MOST_POPULAR,handler,null);
      return;
    }
    for (    final JsonValue v : subreddits) {
      final RedditThing thing=v.asObject(RedditThing.class);
      final RedditSubreddit subreddit=thing.asSubreddit();
      subreddit.downloadTime=timestamp;
      toWrite.add(subreddit);
      output.add(subreddit.getCanonicalName());
    }
    RedditSubredditManager.getInstance(context,user).offerRawSubredditData(toWrite,timestamp);
    final String receivedAfter=redditListing.getString("String_Node_Str");
    if (receivedAfter != null) {
      doSubredditListRequest(type,new RequestResponseHandler<WritableHashSet,SubredditRequestFailure>(){
        public void onRequestFailed(        SubredditRequestFailure failureReason){
          handler.onRequestFailed(failureReason);
        }
        public void onRequestSuccess(        WritableHashSet result,        long timeCached){
          output.addAll(result.toHashset());
          handler.onRequestSuccess(new WritableHashSet(output,timeCached,type.name()),timeCached);
        }
      }
,receivedAfter);
    }
 else {
      handler.onRequestSuccess(new WritableHashSet(output,timestamp,type.name()),timestamp);
    }
  }
 catch (  Exception e) {
    handler.onRequestFailed(new SubredditRequestFailure(RequestFailureType.PARSE,e,null,"String_Node_Str",url.toString()));
  }
}

Fixed version (ground truth):
@Override public void onJsonParseStarted(JsonValue result,long timestamp,UUID session,boolean fromCache){
  try {
    final HashSet<String> output=new HashSet<String>();
    final ArrayList<RedditSubreddit> toWrite=new ArrayList<RedditSubreddit>();
    final JsonBufferedObject redditListing=result.asObject().getObject("String_Node_Str");
    final JsonBufferedArray subreddits=redditListing.getArray("String_Node_Str");
    final JsonBuffered.Status joinStatus=subreddits.join();
    if (joinStatus == JsonBuffered.Status.FAILED) {
      handler.onRequestFailed(new SubredditRequestFailure(RequestFailureType.PARSE,null,null,"String_Node_Str",url.toString()));
      return;
    }
    if (type == RedditSubredditManager.SubredditListType.SUBSCRIBED && subreddits.getCurrentItemCount() == 0) {
      doSubredditListRequest(RedditSubredditManager.SubredditListType.MOST_POPULAR,handler,null);
      return;
    }
    for (    final JsonValue v : subreddits) {
      final RedditThing thing=v.asObject(RedditThing.class);
      final RedditSubreddit subreddit=thing.asSubreddit();
      subreddit.downloadTime=timestamp;
      toWrite.add(subreddit);
      output.add(subreddit.getCanonicalName());
    }
    RedditSubredditManager.getInstance(context,user).offerRawSubredditData(toWrite,timestamp);
    final String receivedAfter=redditListing.getString("String_Node_Str");
    if (receivedAfter != null && type != RedditSubredditManager.SubredditListType.MOST_POPULAR) {
      doSubredditListRequest(type,new RequestResponseHandler<WritableHashSet,SubredditRequestFailure>(){
        public void onRequestFailed(        SubredditRequestFailure failureReason){
          handler.onRequestFailed(failureReason);
        }
        public void onRequestSuccess(        WritableHashSet result,        long timeCached){
          output.addAll(result.toHashset());
          handler.onRequestSuccess(new WritableHashSet(output,timeCached,type.name()),timeCached);
        }
      }
,receivedAfter);
    }
 else {
      handler.onRequestSuccess(new WritableHashSet(output,timestamp,type.name()),timestamp);
    }
  }
 catch (  Exception e) {
    handler.onRequestFailed(new SubredditRequestFailure(RequestFailureType.PARSE,e,null,"String_Node_Str",url.toString()));
  }
}