pypy.objspace.std.test.apptest_typeobjject:test_mutable_bases_versus_slots_2

def test_mutable_bases_versus_slots_2():
        class A(object):
            __slots__ = ['a']
        class B(A):
            __slots__ = ['b1', 'b2']
        class C(B):
            __slots__ = ['c']
>       raises(TypeError, 'C.__bases__ = (A,)')
E       TypeError: 'C.__bases__ = (A,)' object (type: <class 'str'>) must be callable

../build/pypy/objspace/std/test/apptest_typeobjject.py:462: TypeError

builder: pypy-c-jit-linux-x86-64 build #11895+

test: pypy.objspace.std.test.apptest_typeobjject:test_mutable_bases_versus_slots_2