=================================== FAILURES ===================================
________________________ test_MutableSetProxy.test_pop _________________________

self = <t.unit.test_locals.test_MutableSetProxy object at 0x000000000313b7f8>

    def test_pop(self, *, s):
>       assert s.pop() == 1
E       assert 7 == 1
E        +  where 7 = <bound method MutableSetRole.pop of {1, 2, 3, 4, 5, 6}>()
E        +    where <bound method MutableSetRole.pop of {1, 2, 3, 4, 5, 6}> = {1, 2, 3, 4, 5, 6}.pop


t/unit/test_locals.py:538: AssertionError