issue with anyio.sleep_forever()

[jeandet]

Hello,

While trying to use a library based on AnyIO inside a PySide6/QAsync based app.
I got this error:

+-+---------------- 1 ----------------
      | Traceback (most recent call last):
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/wiredb/client.py", line 65, in __asynccontextmanager__
      |     yield self
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/wire_websocket/client_wire.py", line 40, in _connect_ws
      |     await sleep_forever()
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/anyio/_core/_eventloop.py", line 99, in sleep_forever
      |     await sleep(math.inf)
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/anyio/_core/_eventloop.py", line 87, in sleep
      |     return await get_async_backend().sleep(delay)
      |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/anyio/_backends/_asyncio.py", line 2369, in sleep
      |     await sleep(delay)
      |   File "/usr/lib64/python3.13/asyncio/tasks.py", line 714, in sleep
      |     h = loop.call_later(delay,
      |                         futures._set_result_unless_cancelled,
      |                         future, result)
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/qasync/__init__.py", line 471, in call_later
      |     return self._add_callback(
      |            ~~~~~~~~~~~~~~~~~~^
      |         asyncio.Handle(callback, args, self, context=context), delay
      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      |     )
      |     ^
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/qasync/__init__.py", line 477, in _add_callback
      |     return self._timer.add_callback(handle, delay)
      |            ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
      |   File "/home/jeandet/PySide6.9.0Venv3.13/lib64/python3.13/site-packages/qasync/__init__.py", line 255, in add_callback
      |     timerid = self.startTimer(int(max(0, delay) * 1000))
      |                               ~~~^^^^^^^^^^^^^^^^^^^^^^
      | OverflowError: cannot convert float infinity to integer
      +------------------------------------

It seems that QAsync implementation doesn't support math.inf as delay, not sure if this is a known issue.