java.lang.NullPointerException
   at org.netbeans.modules.editor.fold.support.FoldMaintainerImpl.updateFoldsImpl(FoldMaintainerImpl.java:166)
   at org.netbeans.modules.editor.fold.support.FoldMaintainerImpl.access$000(FoldMaintainerImpl.java:78)
   at org.netbeans.modules.editor.fold.support.FoldMaintainerImpl$1.run(FoldMaintainerImpl.java:150)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:439)
   at org.netbeans.modules.editor.fold.support.FoldMaintainerImpl.scheduleUpdate(FoldMaintainerImpl.java:148)
   at org.netbeans.modules.editor.fold.support.FoldMaintainerImpl.updateFolds(FoldMaintainerImpl.java:156)
   at org.netbeans.modules.editor.fold.support.FoldMaintainerImpl.initFolds(FoldMaintainerImpl.java:119)
   at org.netbeans.modules.editor.fold.FoldOperationImpl.initFolds(FoldOperationImpl.java:115)
   at org.netbeans.modules.editor.fold.FoldHierarchyExecution.rebuildManagers(FoldHierarchyExecution.java:666)
   at org.netbeans.modules.editor.fold.FoldHierarchyExecution.rebuild(FoldHierarchyExecution.java:599)
   at org.netbeans.modules.editor.fold.FoldHierarchyExecution.init(FoldHierarchyExecution.java:220)
   at org.netbeans.modules.editor.fold.FoldHierarchyExecution.getOrCreateFoldHierarchy(FoldHierarchyExecution.java:163)
   at org.netbeans.api.editor.fold.FoldHierarchy.get(FoldHierarchy.java:148)
   at org.netbeans.modules.editor.fold.FoldViewFactory.<init>(FoldViewFactory.java:117)
   at org.netbeans.modules.editor.fold.FoldViewFactory$FoldFactory.createEditorViewFactory(FoldViewFactory.java:219)
   at org.netbeans.modules.editor.lib2.view.ViewUpdates.<init>(ViewUpdates.java:128)
   at org.netbeans.modules.editor.lib2.view.DocumentViewOp.parentViewSet(DocumentViewOp.java:513)
   at org.netbeans.modules.editor.lib2.view.DocumentView.setParent(DocumentView.java:608)
   at javax.swing.plaf.basic.BasicTextUI$RootView.setView(BasicTextUI.java:1316)
   at javax.swing.plaf.basic.BasicTextUI.setView(BasicTextUI.java:678)
   at org.netbeans.editor.BaseTextUI.modelChanged(BaseTextUI.java:179)
   at javax.swing.plaf.basic.BasicTextUI$UpdateHandler.propertyChange(BasicTextUI.java:1774)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
   at java.awt.Component.firePropertyChange(Component.java:8154)
   at javax.swing.text.JTextComponent.setDocument(JTextComponent.java:437)
   at javax.swing.JEditorPane.setEditorKit(JEditorPane.java:1096)
   at org.netbeans.modules.java.editor.JavaEditorWarmUpTask.run(JavaEditorWarmUpTask.java:173)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:641)
   at java.awt.EventQueue.access$000(EventQueue.java:84)
   at java.awt.EventQueue$1.run(EventQueue.java:602)
   at java.awt.EventQueue$1.run(EventQueue.java:600)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)