bson_iter_time_t (const bson_iter_t *iter) /* IN */
{
   BSON_ASSERT (iter);

   if (ITER_TYPE (iter) == BSON_TYPE_DATE_TIME) {
      return bson_iter_time_t_unsafe (iter);
   }

   return 0;
}

The product reads data past the end, or before the beginning, of the intended buffer.