UNIXSocket.aclose and _TrioSocketMixin.aclose in cancelled scope does not raise a cancelled error (does not checkpoint)

[graingert]

Things to check first

• I have searched the existing issues and didn't find my bug already reported there

• I have checked that my bug is still present in the latest release

AnyIO version

a8900c2

Python version

py 3.14

What happened?

    async def test_aclose_in_cancelled_scope_raises_cancelled_exc(
        self, server_sock: socket.socket, socket_path: Path
    ) -> None:
        exc = None
        stream = await connect_unix(socket_path)

        with CancelScope() as scope:
            scope.cancel()
            try:
                await stream.aclose()
            except get_cancelled_exc_class() as e:
                exc = e
                raise

        assert exc is not None

failed

How can we reproduce the bug?

see above

[Mukller]

test