java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified: modCount=10 != upToDateModCount=13
Please report against caller's module which needs to be fixed (not the lexer module).
        at org.netbeans.api.lexer.TokenSequence.checkModCount(TokenSequence.java:745)
        at org.netbeans.api.lexer.TokenSequence.moveNext(TokenSequence.java:451)
        at org.netbeans.modules.showtodos.TodoSourceParsing.parse(TodoSourceParsing.java:97)
        at org.netbeans.modules.showtodos.TodoSourceParsing.parseForAnnotatable(TodoSourceParsing.java:132)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider.parse(TodoAnnotationProvider.java:121)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider.annotate(TodoAnnotationProvider.java:107)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider.access$300(TodoAnnotationProvider.java:80)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.run(TodoAnnotationProvider.java:187)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:602)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1070)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.util.ConcurrentModificationException: Caller uses obsolete token sequence which is no longer valid. Underlying token hierarchy has been modified: modCount=10 != upToDateModCount=13
Please report against caller's module which needs to be fixed (not the lexer module).
        at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:655)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.restartTimer(TodoAnnotationProvider.java:181)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.change(TodoAnnotationProvider.java:177)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.insertUpdate(TodoAnnotationProvider.java:147)
        at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.insertUpdate(PriorityDocumentListenerList.java:79)
        at javax.swing.text.AbstractDocument.fireInsertUpdate(AbstractDocument.java:185)
        at org.netbeans.editor.BaseDocument.fireInsertUpdate(BaseDocument.java:1623)
        at org.netbeans.editor.BaseDocument.insertString(BaseDocument.java:778)
        at org.netbeans.editor.BaseKit$DefaultKeyTypedAction.insertString(BaseKit.java:1093)
        at org.netbeans.modules.editor.java.JavaKit$JavaDefaultKeyTypedAction.insertString(JavaKit.java:308)
        at org.netbeans.editor.BaseKit$DefaultKeyTypedAction$1.run(BaseKit.java:1045)
        at org.netbeans.editor.GuardedDocument.runAtomicAsUser(GuardedDocument.java:354)
        at org.netbeans.editor.BaseKit$DefaultKeyTypedAction.actionPerformed(BaseKit.java:1016)
        at org.netbeans.editor.ext.ExtKit$ExtDefaultKeyTypedAction.actionPerformed(ExtKit.java:1040)
        at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:325)
        at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1636)
        at javax.swing.JComponent.processKeyBinding(JComponent.java:2849)
        at javax.swing.JComponent.processKeyBindings(JComponent.java:2884)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2812)
        at java.awt.Component.processEvent(Component.java:5911)
        at java.awt.Container.processEvent(Container.java:2023)
        at java.awt.Component.dispatchEventImpl(Component.java:4501)
        at java.awt.Container.dispatchEventImpl(Container.java:2081)
        at java.awt.Component.dispatchEvent(Component.java:4331)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:704)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:969)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:841)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:668)
        at java.awt.Component.dispatchEventImpl(Component.java:4373)
        at java.awt.Container.dispatchEventImpl(Container.java:2081)
        at java.awt.Window.dispatchEventImpl(Window.java:2458)
        at java.awt.Component.dispatchEvent(Component.java:4331)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:117)
        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)