Method runner

Lib/test/test_asyncio/test_taskgroups.py:138–145

()

            NUM += 1

        async def runner():
            nonlocal NUM, t2

            async with taskgroups.TaskGroup() as g:
                g.create_task(foo1())
                t2 = g.create_task(foo2())

            NUM += 10

        with self.assertRaises(ExceptionGroup) as cm:
            await asyncio.create_task(runner())