Program: 117713
Project: 117713
Buggy source:
private Topic parseLink(JSONObject l,HashMap<String,Topic> thingTypes,TopicMap tm) throws JSONException, TopicMapException {
  if (forceStop()) {
    return null;
  }
  final JSONObject link=l;
  JSONObject linkData=link.getJSONObject("String_Node_Str");
  String kind=link.getString("String_Node_Str");
  String id=linkData.getString("String_Node_Str");
  String title=linkData.getString("String_Node_Str");
  log("String_Node_Str" + title);
  Topic linkTopic=getOrCreateTopic(tm,SI_ROOT + id);
  linkTopic.setDisplayName("String_Node_Str",title);
  linkTopic.setBaseName(title + "String_Node_Str" + id+ "String_Node_Str");
  if (!linkData.getBoolean("String_Node_Str")) {
    String linkUrl=linkData.getString("String_Node_Str");
    Topic destinationTopic=getOrCreateTopic(tm,linkUrl);
    destinationTopic.setSubjectLocator(new Locator(linkUrl));
    HashMap<String,Topic> assTypes=getAssociationTypes(tm);
    Association a=tm.createAssociation(assTypes.get("String_Node_Str"));
    a.addPlayer(linkTopic,thingTypes.get(THING_TYPE_LINK));
    a.addPlayer(destinationTopic,assTypes.get("String_Node_Str"));
  }
  linkTopic.addType(thingTypes.get(kind));
  addLinkOccurenceData(tm,linkData,linkTopic);
  if (linkData.has("String_Node_Str")) {
    final String author=linkData.getString("String_Node_Str");
    if (!extracted.contains(author) && CRAWL_SETTINGS.get("String_Node_Str")) {
      String authorUrl=apiRoot + "String_Node_Str" + author+ "String_Node_Str";
      ParseCallback<JsonNode> callback=new ParseCallback<JsonNode>(tm,thingTypes){
        @Override public void run(        HttpResponse<JsonNode> response){
          try {
            JSONObject respObject=response.getBody().getObject();
            Topic account=null;
            if (respObject.has("String_Node_Str") && respObject.getString("String_Node_Str").equals("String_Node_Str")) {
              extracted.add(author);
              account=parseAccount(respObject,thingTypes,tm);
            }
            if (account != null) {
              associateAccount(tm,link,account,thingTypes);
            }
          }
 catch (          JSONException|TopicMapException e) {
            log(e.getMessage());
          }
        }
      }
;
      requester.doRequest(Unirest.get(authorUrl),callback);
    }
  }
  if (linkData.has("String_Node_Str")) {
    String subredditId=linkData.getString("String_Node_Str");
    Topic subredditTopic=tm.getTopic(SI_ROOT + subredditId);
    associateSubreddit(tm,link,subredditTopic,thingTypes);
    final String subreddit=linkData.getString("String_Node_Str");
    if (!extracted.contains(subreddit) && CRAWL_SETTINGS.get("String_Node_Str")) {
      String subredditUrl=apiRoot + "String_Node_Str" + subreddit+ "String_Node_Str";
      ParseCallback<JsonNode> callback=new ParseCallback<JsonNode>(tm,thingTypes){
        @Override public void run(        HttpResponse<JsonNode> response){
          try {
            JSONObject respObject=response.getBody().getObject();
            Topic subredditTopic=null;
            if (respObject.has("String_Node_Str") && respObject.getString("String_Node_Str").equals("String_Node_Str")) {
              extracted.add(subreddit);
              subredditTopic=parseSubreddit(respObject,thingTypes,tm);
            }
            if (subredditTopic != null) {
              associateSubreddit(tm,link,subredditTopic,thingTypes);
            }
          }
 catch (          JSONException|TopicMapException e) {
            log(e.getMessage());
          }
        }
      }
;
      requester.doRequest(Unirest.get(subredditUrl),callback);
    }
  }
  if (CRAWL_SETTINGS.get("String_Node_Str")) {
    String commentUrl=apiRoot + "String_Node_Str" + linkData.getString("String_Node_Str");
    ParseCallback<JsonNode> callback=new ParseCallback<JsonNode>(tm,thingTypes){
      @Override public void run(      HttpResponse<JsonNode> response){
        try {
          JSONArray respArray=response.getBody().getArray();
          parseThing(respArray.getJSONObject(1),tm,thingTypes);
        }
 catch (        Exception e) {
        }
      }
    }
;
    requester.doRequest(Unirest.get(commentUrl),callback);
  }
  return linkTopic;
}

Fixed version (ground truth):
private Topic parseLink(JSONObject l,HashMap<String,Topic> thingTypes,TopicMap tm) throws JSONException, TopicMapException {
  if (forceStop()) {
    return null;
  }
  final JSONObject link=l;
  JSONObject linkData=link.getJSONObject("String_Node_Str");
  String kind=link.getString("String_Node_Str");
  String id=linkData.getString("String_Node_Str");
  String title=linkData.getString("String_Node_Str");
  log("String_Node_Str" + title);
  Topic linkTopic=getOrCreateTopic(tm,SI_ROOT + id);
  linkTopic.setDisplayName("String_Node_Str",title);
  linkTopic.setBaseName(title + "String_Node_Str" + id+ "String_Node_Str");
  if (!linkData.getBoolean("String_Node_Str")) {
    String linkUrl=linkData.getString("String_Node_Str");
    Topic destinationTopic=getOrCreateTopic(tm,linkUrl);
    destinationTopic.setSubjectLocator(new Locator(linkUrl));
    HashMap<String,Topic> assTypes=getAssociationTypes(tm);
    Association a=tm.createAssociation(assTypes.get("String_Node_Str"));
    a.addPlayer(linkTopic,thingTypes.get(THING_TYPE_LINK));
    a.addPlayer(destinationTopic,assTypes.get("String_Node_Str"));
  }
  linkTopic.addType(thingTypes.get(kind));
  addLinkOccurenceData(tm,linkData,linkTopic);
  if (linkData.has("String_Node_Str")) {
    final String author=linkData.getString("String_Node_Str");
    if (!extracted.contains(author) && CRAWL_SETTINGS.get("String_Node_Str")) {
      String authorUrl=apiRoot + "String_Node_Str" + author+ "String_Node_Str";
      ParseCallback<JsonNode> callback=new ParseCallback<JsonNode>(tm,thingTypes){
        @Override public void run(        HttpResponse<JsonNode> response){
          try {
            JSONObject respObject=response.getBody().getObject();
            Topic account=null;
            if (respObject.has("String_Node_Str") && respObject.getString("String_Node_Str").equals(THING_TYPE_ACCOUNT)) {
              extracted.add(author);
              account=parseAccount(respObject,thingTypes,tm);
            }
            if (account != null) {
              associateAccount(tm,link,account,thingTypes);
            }
          }
 catch (          JSONException|TopicMapException e) {
            log(e.getMessage());
          }
        }
        @Override protected void error(        Exception e,        String body){
          log(e.getMessage());
          if (body != null) {
            log("String_Node_Str");
            log(body);
          }
        }
      }
;
      requester.doRequest(Unirest.get(authorUrl),callback);
    }
  }
  try {
    if (linkData.has("String_Node_Str")) {
      String subredditId=linkData.getString("String_Node_Str");
      String subredditName=linkData.getString("String_Node_Str");
      Topic subredditTopic=getOrCreateTopic(tm,SI_ROOT + subredditId);
      associateSubreddit(tm,link,subredditTopic,thingTypes);
      final String subreddit=linkData.getString("String_Node_Str");
      if (!extracted.contains(subreddit) && CRAWL_SETTINGS.get("String_Node_Str")) {
        String subredditUrl=apiRoot + "String_Node_Str" + subreddit+ "String_Node_Str";
        ParseCallback<JsonNode> callback=new ParseCallback<JsonNode>(tm,thingTypes){
          @Override public void run(          HttpResponse<JsonNode> response){
            try {
              JSONObject respObject=response.getBody().getObject();
              Topic subredditTopic=null;
              if (respObject.has("String_Node_Str") && respObject.getString("String_Node_Str").equals(THING_TYPE_SUBREDDIT)) {
                extracted.add(subreddit);
                subredditTopic=parseSubreddit(respObject,thingTypes,tm);
              }
              if (subredditTopic != null) {
                associateSubreddit(tm,link,subredditTopic,thingTypes);
              }
            }
 catch (            JSONException|TopicMapException e) {
              log(e.getMessage());
            }
          }
          @Override protected void error(          Exception e,          String body){
            log(e.getMessage());
            if (body != null) {
              log("String_Node_Str");
              log(body);
            }
          }
        }
;
        requester.doRequest(Unirest.get(subredditUrl),callback);
      }
    }
  }
 catch (  Exception e) {
    e.printStackTrace();
  }
  if (CRAWL_SETTINGS.get("String_Node_Str")) {
    String commentUrl=apiRoot + "String_Node_Str" + linkData.getString("String_Node_Str");
    ParseCallback<JsonNode> callback=new ParseCallback<JsonNode>(tm,thingTypes){
      @Override public void run(      HttpResponse<JsonNode> response){
        try {
          JSONArray respArray=response.getBody().getArray();
          parseThing(respArray.getJSONObject(1),tm,thingTypes);
        }
 catch (        Exception e) {
          log(e.getMessage());
        }
      }
      @Override protected void error(      Exception e,      String body){
        log(e.getMessage());
        if (body != null) {
          log("String_Node_Str");
          log(body);
        }
      }
    }
;
    System.out.println("String_Node_Str" + commentUrl);
    requester.doRequest(Unirest.get(commentUrl),callback);
  }
  return linkTopic;
}