async def test_nursery_stop_async_iteration() -> None:
    class it:
        def __init__(self, count: int) -> None:
            self.count = count
            self.val = 0

        async def __anext__(self) -> int:
            await sleep(0)
            val = self.val
            if val >= self.count:
                raise StopAsyncIteration
            self.val += 1
            return val

    class async_zip:
        def __init__(self, *largs: it) -> None:
            self.nexts = [obj.__anext__ for obj in largs]

        async def _accumulate(
            self, f: Callable[[], Awaitable[int]], items: list[int], i: int
        ) -> None:
            items[i] = await f()

        def __aiter__(self) -> async_zip:
            return self

        async def __anext__(self) -> list[int]:
            nexts = self.nexts
            items: list[int] = [-1] * len(nexts)

            try:
                async with _core.open_nursery() as nursery:
                    for i, f in enumerate(nexts):
                        nursery.start_soon(self._accumulate, f, items, i)
            except ExceptionGroup as e:
                # With strict_exception_groups enabled, users now need to unwrap
                # StopAsyncIteration and re-raise it.
                # This would be relatively clean on python3.11+ with except*.
                # We could also use RaisesGroup, but that's primarily meant as
                # test infra, not as a runtime tool.
                if len(e.exceptions) == 1 and isinstance(
                    e.exceptions[0], StopAsyncIteration
                ):
                    raise e.exceptions[0] from None
                else:  # pragma: no cover
                    raise AssertionError("unknown error in _accumulate") from e

            return items

    result: list[list[int]] = []
    async for vals in async_zip(it(4), it(2)):
        result.append(vals)
    assert result == [[0, 0], [1, 1]]