ValueStreamError: ValueStream has no value.

[davidpanic]

Describe the issue Sometimes when running connectOrReconnect on a websocket link instance it throws an exception. I think it happens if you call it too fast - before it has a chance to initialize.

To Reproduce

1. call WebSocketLink.connectOrReconnect() (not exactly sure what the required timing is)

Expected behavior I expect the function to cleanly reconnect the link.

device / execution context iOS 15.6.1 on an iPhone 11 Pro Max.

Other useful/optional fields

Stacktrace:

```dart ValueStreamError: ValueStream has no value. You should check ValueStream.hasValue before accessing ValueStream.value, or use ValueStream.valueOrNull instead. File "behavior_subject.dart", line 146, in BehaviorSubject.value File "websocket_client.dart", line 251, in SocketClient._closeSocketChannel File "websocket_client.dart", line 393, in SocketClient.dispose File "websocket_link.dart", line 40, in WebSocketLink.connectOrReconnect ```

additional context

• The error was reported to our sentry instance from an end user device.
• Our backend is an on premise Hasura instance.

[orestesgaolin]

Started having the same issue, popping more often than I anticipated

I tried to wrap this with try-catch, but the Future.wait in the dispose() does not have an error handler, so the error is captured by the zone.

 /// Connects or reconnects to the server with the specified headers.
  void _connectOrReconnect(String token) {
    try {
      _connection?.client.dispose();
    } catch (e, s) {
      _log.e('Error closing connection', e, s);
    }

    _connection = _Connection(
...
    );
  }

[davidpanic]

Will this be fixed? It's kind of a bummer to have errors that can't even be handled because of the missing await...