It is definitely not a bug during development. We just got another one.
Not entirely sure whether this was a bug during development or a bug that an actual user once had. Waiting for more instances of this bug to investigate it further
Phone model: Desktop (47600) Android version: unknown Package name: 64 Alpha: v4.7.6 java.lang.NullPointerException at org.yellowcouch.bpmdj.mixedit.nn.NnLocal.allWithSubstringAndTags(NnLocal.java) at org.yellowcouch.bpmdj.mixedit.nn.NnLocal.singleWithBounds(NnLocal.java) allWithSubstring(NnLocal.java) increment(NnLocal.java) access$100(NnLocal.java) at org.yellowcouch.bpmdj.mixedit.nn.NnLocal.updateSongSet(NnLocal.java) at org.yellowcouch.bpmdj.mixedit.nn.NnLocal.updateNearestNeighbors(NnLocal.java) increment(NnLocal.java) at org.yellowcouch.bpmdj.mixedit.nn.NnLocal.tearDown(NnLocal.java) allWithinBounds(NnLocal.java) singleWithSubstring(NnLocal.java) singleWithSubstringAndTag(NnLocal.java) tagsMatch(NnLocal.java) increment(NnLocal.java) access$000(NnLocal.java) at org.yellowcouch.bpmdj.mixedit.nn.NnLocal$1.stateChanged(NnLocal.java) at org.yellowcouch.flow.petrinet.PetriNet.runQueue(PetriNet.java) at org.yellowcouch.flow.petrinet.DefaultPetriNetExecutor.startAt(DefaultPetriNetExecutor.java) runQueueNow(DefaultPetriNetExecutor.java) at org.yellowcouch.flow.petrinet.DefaultPetriNetExecutor.run(DefaultPetriNetExecutor.java) at java.lang.Thread.run(Thread.java:745)