Program: 86247
Project: 86247
Buggy source:
/** 
 * @param c "Combination" (probably And, Or, ...): Meaning unknown, seemsto always be "1" except in some mysterious queries the website adds every time that don't change the result
 * @param m "Mode": Meaning unknown, seems to always be "1" except in somemysterious queries the website adds every time that don't change the result
 * @param f "Field": The key for the property that is queried, for example"12" for "title"
 * @param o "Operator": The type of search that is made (one of theQUERY_TYPE_ constants above), for example "8" for "contains"
 * @param v "Value": The value that was input by the user
 */
protected int addParametersManual(String combination,String mode,String field,String operator,String value,List<List<NameValuePair>> params,int index){
  List<NameValuePair> list=new ArrayList<>();
  if (data.optBoolean("String_Node_Str")) {
    list.add(new BasicNameValuePair("String_Node_Str" + index,combination));
    list.add(new BasicNameValuePair("String_Node_Str" + index,mode));
    list.add(new BasicNameValuePair("String_Node_Str" + index,field));
    list.add(new BasicNameValuePair("String_Node_Str" + index,operator));
    list.add(new BasicNameValuePair("String_Node_Str" + index,value));
  }
 else {
    list.add(new BasicNameValuePair("String_Node_Str" + index,combination));
    list.add(new BasicNameValuePair("String_Node_Str" + index,mode));
    list.add(new BasicNameValuePair("String_Node_Str" + index,field));
    list.add(new BasicNameValuePair("String_Node_Str" + index,operator));
    list.add(new BasicNameValuePair("String_Node_Str" + index,value));
  }
  params.add(list);
  return index + 1;
}

Fixed version (ground truth):
/** 
 * @param combination "Combination" (probably And, Or, ...): Meaning unknown, seemsto always be "1" except in some mysterious queries the website adds every time that don't change the result
 * @param mode "Mode": Meaning unknown, seems to always be "1" except in somemysterious queries the website adds every time that don't change the result
 * @param field "Field": The key for the property that is queried, for example"12" for "title"
 * @param operator "Operator": The type of search that is made (one of theQUERY_TYPE_ constants above), for example "8" for "contains"
 * @param value "Value": The value that was input by the user
 */
protected int addParametersManual(String combination,String mode,String field,String operator,String value,List<List<NameValuePair>> params,int index){
  List<NameValuePair> list=new ArrayList<>();
  if (data.optBoolean("String_Node_Str")) {
    list.add(new BasicNameValuePair("String_Node_Str" + index,combination));
    list.add(new BasicNameValuePair("String_Node_Str" + index,mode));
    list.add(new BasicNameValuePair("String_Node_Str" + index,field));
    list.add(new BasicNameValuePair("String_Node_Str" + index,operator));
    list.add(new BasicNameValuePair("String_Node_Str" + index,value));
  }
 else {
    list.add(new BasicNameValuePair("String_Node_Str" + index,combination));
    list.add(new BasicNameValuePair("String_Node_Str" + index,mode));
    list.add(new BasicNameValuePair("String_Node_Str" + index,field));
    list.add(new BasicNameValuePair("String_Node_Str" + index,operator));
    list.add(new BasicNameValuePair("String_Node_Str" + index,value));
  }
  params.add(list);
  return index + 1;
}