ClassCastException in SqlgTraversalFilterStepBarrier

[jgustie]

The following sample fails with a CCE (LP_O_OB_P_S_SE_SL_Traverser to SqlgTraverser):

        Graph graph = ...
        graph.addVertex("category", "a", "name", "hello");
        graph.addVertex("category", "b", "name", "ignore");
        graph.addVertex("category", "a", "name", "world");

        GraphTraversalSource g = graph.traversal();
        g.V().group().by("category")
                .unfold()
                .where(select(values).count(local).is(gt(1)))
                .select(values)
                .unfold()
                .values("name")
                .forEachRemaining(System.out::println);

It will run as expected (prints "hello\nworld") when using .withoutStrategies(SqlgTraversalFilterStepStrategy.class).

The part that fails is the cast to call setRequiresOneBulk(true). I'm not going to pretend like I understand what is going on here, just going to be a messenger on this one :)