There was an explicit check for NaNs in the MetricPickleReceiver class but not in the MetricLineReceiver (or MetricDatagramReceiver) for that matter. I've fixed this by moving it to the base MetricReceiver class.
There was an explicit check for NaNs in the MetricPickleRec eiver class but not in the MetricLineReceiver (or MetricDatagramR eceiver) for that matter. I've fixed this by moving it to the base MetricReceiver class.