pypy.objspace.std.test.apptest_typeobjject:test_mutable_bases_versus_weakref

def test_mutable_bases_versus_weakref():
        class A(object):
            __slots__ = ['a']
        class B(A):
            __slots__ = ['__weakref__']
        class C(B):
            pass
>       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:439: TypeError

builder: pypy-c-jit-linux-x86-32 build #8403+

test: pypy.objspace.std.test.apptest_typeobjject:test_mutable_bases_versus_weakref