NPE in CamelCtxNavContentProvider$DeltaWalker.visit

!ENTRY org.eclipse.core.resources 4 2 2017-09-11 17:38:12.839
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.NullPointerException
	at org.fusesource.ide.camel.editor.navigator.CamelCtxNavContentProvider$DeltaWalker.visit(CamelCtxNavContentProvider.java:190)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:64)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:75)
	at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:48)
	at org.fusesource.ide.camel.editor.navigator.CamelCtxNavContentProvider.resourceChanged(CamelCtxNavContentProvider.java:108)
	at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:299)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:289)
	at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:152)
	at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:374)
	at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1469)
	at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2253)
	at org.eclipse.core.internal.events.NotificationManager$NotifyJob.run(NotificationManager.java:43)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)