java.lang.IllegalArgumentException: len=-6 < 0 at org.netbeans.editor.BaseDocument.handleRemove(BaseDocument.java:951) at org.netbeans.editor.BaseDocument$FilterBypassImpl.remove(BaseDocument.java:2493) at javax.swing.text.DocumentFilter.remove(DocumentFilter.java:79) at org.openide.text.CloneableEditorSupport$DocFilter.remove(CloneableEditorSupport.java:2341) at org.netbeans.editor.BaseDocument.remove(BaseDocument.java:937) at org.netbeans.modules.csl.editor.completion.GsfCompletionItem$DelegatedItem$1.run(GsfCompletionItem.java:372) at org.netbeans.editor.GuardedDocument.runAtomic(GuardedDocument.java:321) at org.netbeans.modules.csl.editor.completion.GsfCompletionItem$DelegatedItem.defaultSubstituteText(GsfCompletionItem.java:369) at org.netbeans.modules.csl.editor.completion.GsfCompletionItem$DelegatedItem.substituteText(GsfCompletionItem.java:354) at org.netbeans.modules.csl.editor.completion.GsfCompletionItem.defaultAction(GsfCompletionItem.java:504) at org.netbeans.modules.csl.editor.completion.GsfCompletionItem$DelegatedItem.defaultAction(GsfCompletionItem.java:121) at org.netbeans.modules.editor.completion.CompletionImpl.dispatchKeyEvent(CompletionImpl.java:652) at org.netbeans.modules.editor.completion.CompletionImpl.keyPressed(CompletionImpl.java:380) at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:250) at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:249) at java.awt.Component.processKeyEvent(Component.java:6463) at javax.swing.JComponent.processKeyEvent(JComponent.java:2828) at java.awt.Component.processEvent(Component.java:6282) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4861) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1895) at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762) at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027) at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899) at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727) at java.awt.Component.dispatchEventImpl(Component.java:4731) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Window.dispatchEventImpl(Window.java:2719) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at java.awt.EventQueue$4.run(EventQueue.java:708) at java.awt.EventQueue$4.run(EventQueue.java:706) at java.security.AccessController.doPrivileged(AccessController.java:0) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:705) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)