Program: 125431
Project: 125431
Buggy source:
public static void mergeJSON(JSONObject source,JSONObject target) throws JSONException {
  Iterator<String> keys=source.keys();
  while (keys.hasNext()) {
    String key=keys.next();
    Object o=source.get(key);
    if (target.has(key)) {
      if (o instanceof Integer) {
        int nbSource=source.getInt(key);
        int nbTarget=target.getInt(key);
        target.put(key,nbSource + nbTarget);
      }
 else       if (o instanceof JSONObject) {
        JSONObject objectSource=(JSONObject)o;
        JSONObject objectTarget=target.getJSONObject(key);
        mergeJSON(objectSource,objectTarget);
      }
 else       if (o instanceof JSONArray) {
        JSONArray sourceArray=(JSONArray)o;
        JSONArray targetArray=target.getJSONArray(key);
        Set<Object> data=new HashSet<>();
        for (int i=0; i < sourceArray.length(); i++) {
          data.add(sourceArray.get(i));
        }
        for (int i=0; i < targetArray.length(); i++) {
          data.add(targetArray.get(i));
        }
        targetArray=new JSONArray();
        for (        Object obj : data) {
          targetArray.put(obj);
        }
        target.put(key,targetArray);
      }
 else {
        target.put(key,o);
      }
    }
 else {
      target.put(key,o);
    }
  }
}

Fixed version (ground truth):
public static JSONObject mergeJSON(JSONObject source,JSONObject target) throws JSONException {
  Iterator<String> keys=source.keys();
  while (keys.hasNext()) {
    String key=keys.next();
    Object o=source.get(key);
    if (target.has(key)) {
      if (o instanceof Integer) {
        int nbSource=source.getInt(key);
        int nbTarget=target.getInt(key);
        target.put(key,nbSource + nbTarget);
      }
 else       if (o instanceof JSONObject) {
        JSONObject objectSource=(JSONObject)o;
        JSONObject objectTarget=target.getJSONObject(key);
        mergeJSON(objectSource,objectTarget);
      }
 else       if (o instanceof JSONArray) {
        JSONArray sourceArray=(JSONArray)o;
        JSONArray targetArray=target.getJSONArray(key);
        Set<Object> data=new HashSet<>();
        for (int i=0; i < sourceArray.length(); i++) {
          data.add(sourceArray.get(i));
        }
        for (int i=0; i < targetArray.length(); i++) {
          data.add(targetArray.get(i));
        }
        targetArray=new JSONArray();
        Map<String,List<JSONObject>> objectMap=new HashMap<String,List<JSONObject>>();
        for (        Object obj : data) {
          if ((obj instanceof JSONObject) && ((JSONObject)obj).get("String_Node_Str") != null) {
            List<JSONObject> dataList=new ArrayList<JSONObject>();
            String componentName=(String)((JSONObject)obj).get("String_Node_Str");
            if (objectMap.containsKey(componentName)) {
              dataList=objectMap.get(componentName);
              dataList.add((JSONObject)obj);
            }
 else {
              dataList.add((JSONObject)obj);
              objectMap.put(componentName,dataList);
            }
          }
 else {
            targetArray.put(obj);
          }
        }
        target.put(key,targetArray);
        for (        String objKey : objectMap.keySet()) {
          List<JSONObject> dataList=objectMap.get(objKey);
          if (dataList.size() > 1) {
            JSONObject targetObj=dataList.get(0);
            for (int i=1; i < dataList.size(); i++) {
              JSONObject obj=dataList.get(i);
              targetObj=mergeJSON((JSONObject)obj,targetObj);
            }
            targetArray.put(targetObj);
            target.put(key,targetArray);
          }
 else {
            for (            Object obj : dataList) {
              targetArray.put(obj);
            }
            target.put(key,targetArray);
          }
        }
      }
 else {
        target.put(key,o);
      }
    }
 else {
      target.put(key,o);
    }
  }
  return target;
}