#vulnerable code 
                               @Override
   public String toString()
   {
      if (toString != null)
      {
         return toString;
      }
      toString = "Annotated parameter " + Names.type2String(getDelegate().getClass());
      return toString;
   } 
                            #location 8 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                               @Override
   public String toString()
   {
      if (toString != null)
      {
         return toString;
      }
      toString = toDetailedString();
      return toString;
   }