Method test_c_disallow_instantiation

Lib/test/test_decimal.py:5753–5755

(self)

                    tp.foo = 1

    def test_c_disallow_instantiation(self):
        ContextManager = type(C.localcontext())
        check_disallow_instantiation(self, ContextManager)

    def test_c_signaldict_segfault(self):
        # See gh-106263 for details.