java.lang.NullPointerException
   at java.lang.String.compareTo(String.java:1155)
   at org.netbeans.modules.versioning.core.VersioningMainMenu$ByDisplayNameComparator.compare(VersioningMainMenu.java:232)
   at org.netbeans.modules.versioning.core.VersioningMainMenu$ByDisplayNameComparator.compare(VersioningMainMenu.java:229)
   at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
   at java.util.TimSort.sort(TimSort.java:220)
   at java.util.Arrays.sort(Arrays.java:1438)
   at java.util.Arrays$ArrayList.sort(Arrays.java:3895)
   at java.util.Collections.sort(Collections.java:175)
   at org.netbeans.modules.versioning.core.VersioningMainMenu.createMenu(VersioningMainMenu.java:126)
   at org.netbeans.modules.versioning.core.VersioningMainMenu.getMenuPresenters(VersioningMainMenu.java:78)
   at org.openide.awt.DynaMenuModel.loadSubmenu(DynaMenuModel.java:109)
   at org.openide.awt.MenuBar$LazyMenu$MenuFolder.createInstance(MenuBar.java:808)
   at org.openide.loaders.FolderInstance.defaultProcessObjectsFinal(FolderInstance.java:888)
   at org.openide.loaders.FolderInstance$1R.run(FolderInstance.java:730)
   at org.openide.util.Task.run(Task.java:257)
   at org.netbeans.modules.openide.loaders.AWTTask.run(AWTTask.java:79)
   at org.netbeans.modules.openide.loaders.AWTTask$Processor.run(AWTTask.java:172)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:709)
   at java.awt.EventQueue$3.run(EventQueue.java:703)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)