```
2018-10-26 21:03:17,352 DEBUG Stwalkerster.IrcClient.IrcClient.Freenode.NetworkClient.Inbound - :NotASpy!uid254305@wikimedia/Nick MODE #wikipedia-en-help +g-icfnt
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
at System.Collections.Generic.List`1[T].RemoveAt (System.Int32 index)
at Helpmebot.Model.ModeMonitoring.ModeChanges.FromChangeList (System.Collections.Generic.IEnumerable`1[T] rawChangeList)
at Helpmebot.Background.ModeMonitoringService.OnModeReceived (System.Object sender, Stwalkerster.IrcClient.Events.ModeEventArgs e)
at Stwalkerster.IrcClient.IrcClient.OnIrcMessageReceivedIrcEvent (System.Object sender, Stwalkerster.IrcClient.Events.IrcMessageReceivedEventArgs e)
```