KeyError when meta stream gets property update

[mill1000]

In my Snapcast setup I have multiple input-only streams that get grouped within a meta stream. This meta stream also get grouped into another meta stream.

Some of the input-only streams have a control script to provide stream properties & metadata. When a properties update is received a KeyError is thrown from _on_stream_properties.

Here's a simplified setup

# Input only streams
source = pipe:///streams/gmrender-resurrect-all-rooms?name=upnp-all-rooms&codec=null&controlscript=/usr/local/bin/snapcast-upnp
source = airplay:////usr/local/bin/shairport-sync?name=airplay-all-rooms&devicename=Snapcast - All Rooms&port=5000&codec=null
source = librespot:///bin/librespot?name=spotify-all-rooms&devicename=Snapcast - All Rooms&codec=null

# Input only meta source for all rooms
source = meta:///upnp-all-rooms/airplay-all-rooms/spotify-all-rooms?name=all-rooms&codec=null

# Meta sources for individual rooms
source = meta:///upnp-bedroom/airplay-bedroom/spotify-bedroom/all-rooms?name=Bedroom
source = meta:///upnp-living-room/airplay-living-room/spotify-living-room/all-rooms?name=Living Room

Pretty much it's Input-only stream w/ script -> Input-only meta stream -> Meta stream

And here's the error

ERROR: Fatal error: protocol.data_received() call failed.
protocol: <snapcast.control.protocol.SnapcastProtocol object at 0x7f57e6fa0e50>
transport: <_SelectorSocketTransport fd=6 read=polling write=<idle, bufsize=0>>
Traceback (most recent call last):
  File "/usr/lib/python3.11/asyncio/selector_events.py", line 1009, in _read_ready__data_received
    self._protocol.data_received(data)
  File "/home/wyse/.local/lib/python3.11/site-packages/snapcast/control/protocol.py", line 54, in data_received
    self.handle_data(item)
  File "/home/wyse/.local/lib/python3.11/site-packages/snapcast/control/protocol.py", line 61, in handle_data
    self.handle_notification(data)
  File "/home/wyse/.local/lib/python3.11/site-packages/snapcast/control/protocol.py", line 73, in handle_notification
    self._callbacks.get(data.get('method'))(data.get('params'))
  File "/home/wyse/.local/lib/python3.11/site-packages/snapcast/control/server.py", line 420, in _on_stream_properties
    stream = self._streams[data.get('id')]
             ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
KeyError: 'all-rooms'

I dumped the contents of self._streams and the incoming data. It appears Snapcast is generating a properties update for the 2nd meta stream which the library is not tracking.

Contents of self._streams

{'Bedroom': Snapstream (Bedroom), 'Living Room': Snapstream (Living Room)}

Incoming data

{'id': 'all-rooms', 'properties': {'canControl': False, 'canGoNext': False, 'canGoPrevious': False, 'canPause': False, 'canPlay': False, 'canSeek': False, 'loopStatus': 'none', 'mute': False, 'playbackStatus': 'playing', 'position': 0.0, 'rate': 1.0, 'shuffle': False, 'volume': 100}}

I don't know if Snapcast shouldn't be generating the update for this meta stream, but at least this library can add a check for the ID.