Message5310

Seems like inheriting from the same interface twice causes problems.
ComboBoxModel is a subinterface of ListModel.
The following code should work but doesn't:

from javax.swing import ListModel
from javax.swing import ComboBoxModel

class A(ListModel): pass
class B(A, ComboBoxModel): pass
class C(B): pass

TypeError: Error when calling the metaclass bases
    Cannot create a consistent method resolution
order (MRO) for bases B[<class '__main__.A'>, <type
'org.python.proxies.__main__$B$2'>]

What I really can't understand is why it only barfs at "class C(...)"
and not when creating the "problem" type (B).