Listenbrainz: skip tracks that do not have mbid instead of crashing. fixes #249

src/libs/services/scrobbling/impl/listenbrainz/FeedbacksSynchronizer.cpp

@@ -179,6 +179,7 @@ namespace Scrobbling::ListenBrainz
 			switch (type)
 			{
 				case FeedbackType::Love:
+					if (starredTrack->getScrobblingState() != ScrobblingState::PendingAdd)
 						starredTrack.modify()->setScrobblingState(ScrobblingState::PendingAdd);
 					break;
 
@@ -200,6 +201,12 @@ namespace Scrobbling::ListenBrainz
 					throw Exception {"Unhandled feedback type"};
 			}
 
+			if (!recordingMBID)
+			{
+				LOG(DEBUG) << "Track has no recording MBID: skipping";
+				return;
+			}
+
 			const std::optional<UUID> listenBrainzToken {starredTrack->getUser()->getListenBrainzToken()};
 			if (!listenBrainzToken)
 				return;