Heterodyne Channelizer Shows Error When Sourcing New Traffic Channel

[DSheirer]

When sourcing a new traffic channel from a tuner employing the Heterdyne channelizer, it appears that there is an error thrown while attempting to find the new center frequency for the tuner. The issue appears to be in the java core library implementation of constructing a TreeSet from a sorted set.

2022-12-17 07:45:43.550 ERROR i.g.d.s.t.m.TunerManager - Error obtaining channel from tuner [Airspy 440464C8-39967E4F]  [384MB/2GB 18%]
java.util.NoSuchElementException: null
	at java.base/java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1484)
	at java.base/java.util.TreeMap$KeyIterator.next(TreeMap.java:1540)
	at java.base/java.util.TreeMap.buildFromSorted(TreeMap.java:2883)
	at java.base/java.util.TreeMap.buildFromSorted(TreeMap.java:2903)
	at java.base/java.util.TreeMap.buildFromSorted(TreeMap.java:2903)
	at java.base/java.util.TreeMap.buildFromSorted(TreeMap.java:2828)
	at java.base/java.util.TreeMap.addAllForTreeSet(TreeMap.java:2787)
	at java.base/java.util.TreeSet.addAll(TreeSet.java:305)
	at java.base/java.util.TreeSet.<init>(TreeSet.java:172)
	at io.github.dsheirer.source.tuner.manager.CenterFrequencyCalculator.canTune(CenterFrequencyCalculator.java:148)
	at io.github.dsheirer.source.tuner.manager.HeterodyneChannelSourceManager.getSource(HeterodyneChannelSourceManager.java:101)
	at io.github.dsheirer.source.tuner.manager.TunerManager.getSource(TunerManager.java:501)
	at io.github.dsheirer.source.tuner.manager.TunerManager.getSource(TunerManager.java:427)
	at io.github.dsheirer.controller.channel.ChannelProcessingManager.startProcessing(ChannelProcessingManager.java:382)
	at io.github.dsheirer.controller.channel.ChannelProcessingManager.startChannelRequest(ChannelProcessingManager.java:318)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
	at java.base/java.lang.reflect.Method.invoke(Method.java:578)
	at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:85)
	at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:142)
	at com.google.common.eventbus.Subscriber.lambda$dispatchEvent$0(Subscriber.java:71)
	at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:31)
	at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:68)
	at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:109)
	at com.google.common.eventbus.EventBus.post(EventBus.java:267)
	at io.github.dsheirer.module.decode.p25.P25TrafficChannelManager.processPhase1ChannelGrant(P25TrafficChannelManager.java:374)
	at io.github.dsheirer.module.decode.p25.P25TrafficChannelManager.processChannelGrant(P25TrafficChannelManager.java:253)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderState.processChannelGrant(P25P1DecoderState.java:333)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderState.processTSBKGroupVoiceChannelGrantUpdate(P25P1DecoderState.java:1669)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderState.processTSBK(P25P1DecoderState.java:1066)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderState.receive(P25P1DecoderState.java:308)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderState.receive(P25P1DecoderState.java:153)
	at io.github.dsheirer.sample.Broadcaster.broadcast(Broadcaster.java:151)
	at io.github.dsheirer.sample.Broadcaster.receive(Broadcaster.java:50)
	at io.github.dsheirer.module.decode.Decoder$MessageDistributor.receive(Decoder.java:97)
	at io.github.dsheirer.module.decode.Decoder$MessageDistributor.receive(Decoder.java:90)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1MessageProcessor.receive(P25P1MessageProcessor.java:92)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1MessageProcessor.receive(P25P1MessageProcessor.java:34)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1MessageFramer.dispatchMessage(P25P1MessageFramer.java:325)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1MessageFramer.receive(P25P1MessageFramer.java:204)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1MessageFramer.receive(P25P1MessageFramer.java:70)
	at io.github.dsheirer.sample.Broadcaster.broadcast(Broadcaster.java:151)
	at io.github.dsheirer.sample.Broadcaster.receive(Broadcaster.java:50)
	at io.github.dsheirer.dsp.psk.PSKDemodulator.broadcast(PSKDemodulator.java:61)
	at io.github.dsheirer.dsp.psk.DQPSKGardnerDemodulator.calculateSymbol(DQPSKGardnerDemodulator.java:88)
	at io.github.dsheirer.dsp.psk.PSKDemodulator.receive(PSKDemodulator.java:117)
	at io.github.dsheirer.dsp.psk.PSKDemodulator.receive(PSKDemodulator.java:93)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderLSM.receive(P25P1DecoderLSM.java:116)
	at io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderLSM.receive(P25P1DecoderLSM.java:39)
	at io.github.dsheirer.sample.Broadcaster.broadcast(Broadcaster.java:151)
	at io.github.dsheirer.sample.Broadcaster.receive(Broadcaster.java:50)
	at io.github.dsheirer.source.tuner.channel.StreamProcessorWithHeartbeat.receive(StreamProcessorWithHeartbeat.java:118)
	at io.github.dsheirer.source.tuner.channel.HalfBandTunerChannelSource$NativeBufferProcessor.receive(HalfBandTunerChannelSource.java:231)
	at io.github.dsheirer.source.tuner.channel.HalfBandTunerChannelSource$NativeBufferProcessor.receive(HalfBandTunerChannelSource.java:219)
	at io.github.dsheirer.util.Dispatcher$Processor.run(Dispatcher.java:181)
	at java.base/java.lang.Thread.run(Thread.java:1589)