Whenever an admin adds an extra stream in the server , an error is thrown if a message in received the newly added stream as :
Screenshot

Traceback :

Traceback (most recent call last):
  File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.8/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/home/aryanshridhar/Desktop/zulip-terminal-env/zulip-terminal/zulipterminal/model.py", line 1194, in poll_for_events
    self.event_actions[event['type']](event)
  File "/home/aryanshridhar/Desktop/zulip-terminal-env/zulip-terminal/zulipterminal/model.py", line 918, in _handle_message_event
    set_count([message['id']], self.controller, 1)
  File "/home/aryanshridhar/Desktop/zulip-terminal-env/zulip-terminal/zulipterminal/helper.py", line 249, in set_count
    _set_count_in_view(controller, new_count, changed_messages, unread_counts)
  File "/home/aryanshridhar/Desktop/zulip-terminal-env/zulip-terminal/zulipterminal/helper.py", line 214, in _set_count_in_view
    if controller.model.is_muted_topic(stream_id, msg_topic):
  File "/home/aryanshridhar/Desktop/zulip-terminal-env/zulip-terminal/zulipterminal/model.py", line 474, in is_muted_topic
    stream_name = self.stream_dict[stream_id]['name']
KeyError: 263064

To reproduce :

• Create a new stream in the server .
• Add (Reply/New topic) an message in the newly created stream .
• Checkout the zulip terminal (which was active throughout the process) .

Zulip-version :

$ zulip-term -v
Zulip Terminal 0.5.2