Message4825

I tried to produce a simple example that recreates the problem. That, of
course, didn't work.

I assume the issue is that lookup_where is not allowed to return an
object of type PyClass?

If lookup_where is allowed to return any type other than a PyType or one
of its descendants (and it's typed as PyObject so it could easily do
so), then I believe that the code is incorrect by inspection. The array
definition should be PyObject instead of PyType.

If, however, by convention lookup_where is only allowed to return
descendants of PyType (even though the type is PyObject) then the bug
lies elsewhere in something that's causing it to violate the convention.

If I can produce a simple example, I'll send it in.