Fixed #22163 -- Stopped ignoring unhandled kwargs in select_for_update.

        else:

            return self._filter_or_exclude(None, **filter_obj)

    def select_for_update(self, **kwargs):

    def select_for_update(self, nowait=False):

        """

        Returns a new QuerySet instance that will select objects with a

        FOR UPDATE lock.

        """

        # Default to false for nowait

        nowait = kwargs.pop('nowait', False)

        obj = self._clone()

        obj._for_write = True

        obj.query.select_for_update = True