Andrew created NETBEANS-1632:
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             Summary: java.lang.IllegalStateException: Lexer 
                 Key: NETBEANS-1632
                 URL: https://issues.apache.org/jira/browse/NETBEANS-1632
             Project: NetBeans
          Issue Type: Bug
            Reporter: Andrew


I worked with JSF and Glassfish. The exception thrown is not the first time.
{noformat}
SEVERE [global]
java.lang.IllegalStateException: Lexer 
org.netbeans.modules.el.lexer.ELLexer@5c9cd2
 returned null token but lexerInput.readLength()=1
 lexer-state: org.netbeans.modules.el.lexer.ELState@35a
 tokenStartOffset=3818, readOffset=3819, lookaheadOffset=3820
 Chars: "\\" - these characters need to be tokenized.
Fix the lexer to not return null token in this state.
 at 
org.netbeans.lib.lexer.LexerInputOperation.checkLexerInputFinished(LexerInputOperation.java:435)
 at 
org.netbeans.lib.lexer.LexerInputOperation.nextToken(LexerInputOperation.java:193)
 at org.netbeans.lib.lexer.inc.TokenListUpdater.relex(TokenListUpdater.java:602)
 at 
org.netbeans.lib.lexer.inc.TokenListUpdater.updateRegular(TokenListUpdater.java:255)
 at 
org.netbeans.lib.lexer.inc.TokenHierarchyUpdate$UpdateItem.update(TokenHierarchyUpdate.java:325)
 at 
org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.processLevelInfos(TokenHierarchyUpdate.java:200)
 at 
org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.updateImpl(TokenHierarchyUpdate.java:171)
 at 
org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.update(TokenHierarchyUpdate.java:109)
 at 
org.netbeans.lib.lexer.TokenHierarchyOperation.textModified(TokenHierarchyOperation.java:585)
 at 
org.netbeans.spi.lexer.TokenHierarchyControl.textModified(TokenHierarchyControl.java:71)
 at 
org.netbeans.lib.lexer.inc.DocumentInput.textModified(DocumentInput.java:128)
 at 
org.netbeans.lib.lexer.inc.DocumentInput.insertUpdate(DocumentInput.java:117)
 at 
org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.insertUpdate(PriorityDocumentListenerList.java:60)
 at 
javax.swing.text.AbstractDocument.fireInsertUpdate(AbstractDocument.java:201)
 at org.netbeans.editor.BaseDocument.fireInsertUpdate(BaseDocument.java:1647)
 at org.netbeans.editor.BaseDocument.handleInsertString(BaseDocument.java:822)
 at 
org.netbeans.editor.BaseDocument$FilterBypassImpl.insertString(BaseDocument.java:2643)
 at javax.swing.text.DocumentFilter.insertString(DocumentFilter.java:100)
 at 
org.openide.text.CloneableEditorSupport$DocFilter.insertString(CloneableEditorSupport.java:2344)
 at org.netbeans.editor.BaseDocument.insertString(BaseDocument.java:741)
 at 
org.netbeans.editor.BaseKit$DefaultKeyTypedAction.insertString(BaseKit.java:1323)
 at 
org.netbeans.editor.BaseKit$DefaultKeyTypedAction.performTextInsertion(BaseKit.java:1389)
 at 
org.netbeans.editor.BaseKit$DefaultKeyTypedAction.access$100(BaseKit.java:1052)
 at org.netbeans.editor.BaseKit$DefaultKeyTypedAction$3.run(BaseKit.java:1255)
 at 
org.netbeans.editor.GuardedDocument.runAtomicAsUser(GuardedDocument.java:333)
 at 
org.netbeans.editor.BaseKit$DefaultKeyTypedAction.actionPerformed(BaseKit.java:1231)
 at 
org.netbeans.editor.ext.ExtKit$ExtDefaultKeyTypedAction.actionPerformed(ExtKit.java:1055)
 at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:322)
 at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)
 at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
 at javax.swing.JComponent.processKeyBindings(JComponent.java:2929)
 at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
 at java.awt.Component.processEvent(Component.java:6310)
 at java.awt.Container.processEvent(Container.java:2236)
 at java.awt.Component.dispatchEventImpl(Component.java:4889)
 at java.awt.Container.dispatchEventImpl(Container.java:2294)
 at java.awt.Component.dispatchEvent(Component.java:4711)
 at 
java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
 at 
java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)
 at 
java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)
 at 
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)
 at 
java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)
 at java.awt.Component.dispatchEventImpl(Component.java:4760)
 at java.awt.Container.dispatchEventImpl(Container.java:2294)
 at java.awt.Window.dispatchEventImpl(Window.java:2746)
 at java.awt.Component.dispatchEvent(Component.java:4711)
 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
 at java.awt.EventQueue.access$500(EventQueue.java:97)
 at java.awt.EventQueue$3.run(EventQueue.java:709)
 at java.awt.EventQueue$3.run(EventQueue.java:703)
 at java.security.AccessController.doPrivileged(Native Method)
 at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
 at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
 at java.awt.EventQueue$4.run(EventQueue.java:731)
 at java.awt.EventQueue$4.run(EventQueue.java:729)
 at java.security.AccessController.doPrivileged(Native Method)
 at 
java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
 at 
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:136)
[catch] 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){noformat}



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