java.util.ConcurrentModificationException
   at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
   at java.util.HashMap$EntryIterator.next(HashMap.java:834)
   at java.util.HashMap$EntryIterator.next(HashMap.java:832)
   at java.util.HashMap.putAllForCreate(HashMap.java:435)
   at java.util.HashMap.<init>(HashMap.java:225)
   at org.netbeans.modules.options.editor.keymap.EditorBridge.getEditorActionsMap(EditorBridge.java:223)
   at org.netbeans.modules.options.editor.keymap.EditorBridge.getActions(EditorBridge.java:103)
   at org.netbeans.modules.options.keymap.KeymapModel.getActionCategories(KeymapModel.java:107)
   at org.netbeans.modules.options.keymap.KeymapViewModel.getCategories(KeymapViewModel.java:160)
   at org.netbeans.modules.options.keymap.KeymapViewModel.update(KeymapViewModel.java:219)
   at org.netbeans.modules.options.keymap.KeymapPanel.update(KeymapPanel.java:280)
   at org.netbeans.modules.options.keymap.KeymapPanelController.update(KeymapPanelController.java:74)
   at org.netbeans.modules.options.CategoryModel$Category.update(CategoryModel.java:381)
   at org.netbeans.modules.options.OptionsPanel.setCurrentCategory(OptionsPanel.java:182)
   at org.netbeans.modules.options.OptionsPanel.access$100(OptionsPanel.java:98)
   at org.netbeans.modules.options.OptionsPanel$CategoryButton.mouseReleased(OptionsPanel.java:528)
   at java.awt.Component.processMouseEvent(Component.java:6267)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
   at java.awt.Component.processEvent(Component.java:6032)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4577)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4238)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4168)
   at java.awt.Container.dispatchEventImpl(Container.java:2085)
   at java.awt.Window.dispatchEventImpl(Window.java:2478)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:158)
   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)