NPE in PdeModelHelper#getBundlesImporting()

[briandealwis]

!ENTRY ca.ubc.cs.ferret 4 255 2017-06-13 14:57:42.084
!MESSAGE Exception while executing ICQ BundlesImportingPackage{category: declarations, Consultation(!done: com.google.cloud.tools.eclipse.swtbot)}
!STACK 0
java.lang.NullPointerException
	at ca.ubc.cs.ferret.pde.PdeModelHelper.getBundlesImporting(PdeModelHelper.java:554)
	at ca.ubc.cs.ferret.pde.queries.BundlesImportingPackage.performQuery(BundlesImportingPackage.java:32)
	at ca.ubc.cs.ferret.pde.queries.BundlesImportingPackage.performQuery(BundlesImportingPackage.java:1)
	at ca.ubc.cs.ferret.model.AbstractIntersectionConceptualQuery.internalRun(AbstractIntersectionConceptualQuery.java:51)
	at ca.ubc.cs.ferret.model.AbstractConceptualQuery.run(AbstractConceptualQuery.java:81)
	at ca.ubc.cs.ferret.model.Consultation.runConceptualQueries(Consultation.java:145)
	at ca.ubc.cs.ferret.model.Consultation.run(Consultation.java:115)
	at ca.ubc.cs.ferret.Consultancy$4.run(Consultancy.java:438)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)