System.ArgumentException: 'The tasks argument included a null value. (Parameter 'tasks')'

[abstract195]

SignalR.Orleans/src/SignalR.Orleans/Clients/ClientGrain.cs

Line 65 in 7f03597

await Task.WhenAll(subscriptionTasks);

above code might throw System.ArgumentException: 'The tasks argument included a null value. (Parameter 'tasks')' because 'ArrayPool.Shared.Rent(connections.Count);' might return a bigger array filled with nulls

[michaelmcneilnet]

It would be great if the PR for this could be reviewed, we have just started using this library and this exception appears a lot throughout our logging. We've had to ignore all the errors generated when sending out signalr messages too, with an empty try/catch.