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java.lang.NullPointerException: null	at net.sourceforge.pmd.eclipse.ui.model.AbstractPMDRecord.findResource(AbstractPMDRecord.java:246)	at net.sourceforge.pmd.eclipse.ui.views.ChangeEvaluator.searchProjectForModifications(ChangeEvaluator.java:161)	at net.sourceforge.pmd.eclipse.ui.views.ChangeEvaluator.updateFiles(ChangeEvaluator.java:121)	at net.sourceforge.pmd.eclipse.ui.views.ChangeEvaluator.changeRecordFor(ChangeEvaluator.java:81)	at net.sourceforge.pmd.eclipse.ui.views.ViolationOverviewContentProvider.resourceChanged(ViolationOverviewContentProvider.java:330)