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I cut and paste some folded code, and it might have been a total of a few hundred lines...(but folded was only about 20 or so)... anyway, I got a couple of exceptions, and had to revert to the last saved version of the source code. java.lang.IndexOutOfBoundsException: Invalid line index=461 >= lineCount=461 at org.netbeans.editor.LineRootElement.getElement(LineRootElement.java:85) at org.netbeans.editor.DrawEngineDocView.createCustomView(DrawEngineDocView.java:210) at org.netbeans.lib.editor.view.GapBoxView.customReloadChildren(GapBoxView.java:1829) at org.netbeans.editor.DrawEngineDocView.customReloadChildren(DrawEngineDocView.java:191) at org.netbeans.lib.editor.view.GapBoxView.reloadChildren(GapBoxView.java:1741) at org.netbeans.lib.editor.view.GapBoxView.rebuild(GapBoxView.java:580) at org.netbeans.lib.editor.view.GapBoxView.offsetRebuild(GapBoxView.java:603) at org.netbeans.editor.DrawEngineDocView.foldHierarchyChanged(DrawEngineDocView.java:288) at org.netbeans.modules.editor.fold.FoldHierarchyExecution.fireFoldHierarchyListener(FoldHierarchyExecution.java:302) at org.netbeans.modules.editor.fold.FoldHierarchyExecution.createAndFireFoldHierarchyEvent(FoldHierarchyExecution.java:528) at org.netbeans.modules.editor.fold.FoldHierarchyTransactionImpl.commit(FoldHierarchyTransactionImpl.java:207) at org.netbeans.modules.editor.fold.FoldHierarchyExecution.removeUpdate(FoldHierarchyExecution.java:702) at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.removeUpdate(PriorityDocumentListenerList.java:57) at javax.swing.text.AbstractDocument.fireRemoveUpdate(AbstractDocument.java:242) at org.netbeans.editor.BaseDocument.fireRemoveUpdate(BaseDocument.java:1262) at org.netbeans.editor.BaseDocument.remove(BaseDocument.java:731) at javax.swing.plaf.basic.BasicTextUI$TextTransferHandler$TextTransferable.removeText(BasicTextUI.java:2413) at javax.swing.plaf.basic.BasicTextUI$TextTransferHandler.exportDone(BasicTextUI.java:2288) at javax.swing.TransferHandler.exportToClipboard(TransferHandler.java:228) at org.openide.text.QuietEditorPane$DelegatingTransferHandler.exportToClipboard(QuietEditorPane.java:134) at org.openide.text.QuietEditorPane$DelegatingTransferHandler.exportToClipboard(QuietEditorPane.java:134) at org.openide.text.QuietEditorPane$DelegatingTransferHandler.exportToClipboard(QuietEditorPane.java:134) at javax.swing.TransferHandler$TransferAction.actionPerformed(TransferHandler.java:831) at javax.swing.text.JTextComponent.invokeAction(JTextComponent.java:1233) at javax.swing.text.JTextComponent.cut(JTextComponent.java:1180) at org.netbeans.editor.BaseKit$CutAction.actionPerformed(BaseKit.java:1287) at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:194) at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1571) at javax.swing.JComponent.processKeyBinding(JComponent.java:2763) at javax.swing.JComponent.processKeyBindings(JComponent.java:2798) at javax.swing.JComponent.processKeyEvent(JComponent.java:2726) at java.awt.Component.processEvent(Component.java:5265) at java.awt.Container.processEvent(Container.java:1966) at java.awt.Component.dispatchEventImpl(Component.java:3955) at java.awt.Container.dispatchEventImpl(Container.java:2024) at java.awt.Component.dispatchEvent(Component.java:3803) at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1810) at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:672) at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:920) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:798) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:636) at java.awt.Component.dispatchEventImpl(Component.java:3841) at java.awt.Container.dispatchEventImpl(Container.java:2024) at java.awt.Window.dispatchEventImpl(Window.java:1774) at java.awt.Component.dispatchEvent(Component.java:3803) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110) *****then***** javax.swing.undo.CannotUndoException at org.netbeans.editor.BaseDocumentEvent.undo(BaseDocumentEvent.java:240) at org.netbeans.editor.GuardedDocumentEvent.undo(GuardedDocumentEvent.java:41) at javax.swing.undo.CompoundEdit.undo(CompoundEdit.java:46) at org.netbeans.editor.BaseDocument$AtomicCompoundEdit.undo(BaseDocument.java:1638) at javax.swing.undo.UndoManager.undoTo(UndoManager.java:210) at javax.swing.undo.UndoManager.undo(UndoManager.java:275) at org.openide.text.CloneableEditorSupport$CESUndoRedoManager.access$2101(CloneableEditorSupport.java:2555) at org.openide.text.CloneableEditorSupport$CESUndoRedoManager$RenderUndo.run(CloneableEditorSupport.java:2695) at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:219) at org.openide.text.CloneableEditorSupport$CESUndoRedoManager$RenderUndo.<init>(CloneableEditorSupport.java:2675) at org.openide.text.CloneableEditorSupport$CESUndoRedoManager$RenderUndo.<init>(CloneableEditorSupport.java:2667) at org.openide.text.CloneableEditorSupport$CESUndoRedoManager.undo(CloneableEditorSupport.java:2586) at org.openide.actions.UndoAction.performAction(UndoAction.java:134) at org.openide.util.actions.CallableSystemAction$1.run(CallableSystemAction.java:94) at org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:47) at org.openide.util.actions.CallableSystemAction.actionPerformed(CallableSystemAction.java:90) at org.netbeans.modules.editor.NbEditorKit$NbUndoAction.actionPerformed(NbEditorKit.java:512) at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:194) at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1571) at javax.swing.JComponent.processKeyBinding(JComponent.java:2763) at javax.swing.JComponent.processKeyBindings(JComponent.java:2798) at javax.swing.JComponent.processKeyEvent(JComponent.java:2726) at java.awt.Component.processEvent(Component.java:5265) at java.awt.Container.processEvent(Container.java:1966) at java.awt.Component.dispatchEventImpl(Component.java:3955) at java.awt.Container.dispatchEventImpl(Container.java:2024) at java.awt.Component.dispatchEvent(Component.java:3803) at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1810) at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:672) at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:920) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:798) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:636) at java.awt.Component.dispatchEventImpl(Component.java:3841) at java.awt.Container.dispatchEventImpl(Container.java:2024) at java.awt.Window.dispatchEventImpl(Window.java:1774) at java.awt.Component.dispatchEvent(Component.java:3803) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Created attachment 25775 [details] my error messages file for this problem
It would be nice if you could provide a reproducible case. Anyway the problem should correspond to the issue 61971 which was fixed one day after the build that you are using was made. Please reopen the issue if you can reproduce the problem in newer builds too. *** This issue has been marked as a duplicate of 61971 ***