java.lang.NullPointerException
   at org.netbeans.modules.bugtracking.spi.BugtrackingFactory.getIssueImpl(BugtrackingFactory.java:127)
   at org.netbeans.modules.bugtracking.spi.BugtrackingFactory.getUndoRedoSupport(BugtrackingFactory.java:108)
   at org.netbeans.modules.bugzilla.Bugzilla.getUndoRedoSupport(Bugzilla.java:167)
   at org.netbeans.modules.bugzilla.issue.IssuePanel.opened(IssuePanel.java:3040)
   at org.netbeans.modules.bugzilla.issue.IssueController.opened(IssueController.java:87)
   at org.netbeans.modules.bugtracking.ui.issue.IssueTopComponent.setIssue(IssueTopComponent.java:210)
   at org.netbeans.modules.bugtracking.ui.issue.IssueAction$3$1$1.run(IssueAction.java:213)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)