Method test_co_positions_artificial_instructions

Lib/test/test_code.py:505–550

(self)

    @requires_debug_ranges()
    def test_co_positions_artificial_instructions(self):
        import dis

        namespace = {}
        exec(textwrap.dedent("""\
        try:
            1/0
        except Exception as e:
            exc = e
        """), namespace)

        exc = namespace['exc']
        traceback = exc.__traceback__
        code = traceback.tb_frame.f_code

        artificial_instructions = []
        for instr, positions in instructions_with_positions(
            dis.get_instructions(code), code.co_positions()
        ):
            # If any of the positions is None, then all have to
            # be None as well for the case above. There are still
            # some places in the compiler, where the artificial instructions
            # get assigned the first_lineno but they don't have other positions.
            # There is no easy way of inferring them at that stage, so for now
            # we don't support it.
            self.assertIn(positions.count(None), [0, 3, 4])

            if not any(positions):
                artificial_instructions.append(instr)

        self.assertEqual(
            [
                (instruction.opname, instruction.argval)
                for instruction in artificial_instructions
            ],
            [
                ("PUSH_EXC_INFO", None),
                ("LOAD_CONST", None), # artificial 'None'
                ("STORE_NAME", "e"),  # XX: we know the location for this
                ("DELETE_NAME", "e"),
                ("RERAISE", 1),
                ("COPY", 3),
                ("POP_EXCEPT", None),
                ("RERAISE", 1)
            ]
        )

    def test_endline_and_columntable_none_when_no_debug_ranges(self):
        # Make sure that if `-X no_debug_ranges` is used, there is