java.lang.IllegalStateException: Attempt to mutate in notification
   at javax.swing.text.AbstractDocument.writeLock(AbstractDocument.java:1338)
   at javax.swing.text.AbstractDocument.replace(AbstractDocument.java:658)
   at javax.swing.text.JTextComponent.setText(JTextComponent.java:1669)
   at org.netbeans.modules.options.OptionsPanel.showHint(OptionsPanel.java:464)
   at org.netbeans.modules.options.OptionsPanel.access$800(OptionsPanel.java:125)
   at org.netbeans.modules.options.OptionsPanel$OptionsQSCallback.quickSearchCanceled(OptionsPanel.java:821)
   at org.openide.awt.QuickSearch$SearchFieldListener.searchForNode(QuickSearch.java:825)
   at org.openide.awt.QuickSearch$SearchFieldListener.removeUpdate(QuickSearch.java:755)
   at javax.swing.text.AbstractDocument.fireRemoveUpdate(AbstractDocument.java:259)
   at javax.swing.text.AbstractDocument.handleRemove(AbstractDocument.java:622)
   at javax.swing.text.AbstractDocument.remove(AbstractDocument.java:590)
   at javax.swing.text.AbstractDocument.replace(AbstractDocument.java:666)
   at javax.swing.text.JTextComponent.setText(JTextComponent.java:1669)
   at org.netbeans.modules.options.OptionsPanel.clearSearchField(OptionsPanel.java:453)
   at org.netbeans.modules.options.OptionsPanel.cancel(OptionsPanel.java:337)
   at org.netbeans.modules.options.OptionsDisplayerImpl$OptionsPanelListener.actionPerformed(OptionsDisplayerImpl.java:503)
   at org.netbeans.core.windows.services.NbPresenter$ButtonListener.actionPerformed(NbPresenter.java:1379)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
   at java.awt.Component.processMouseEvent(Component.java:6525)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
   at java.awt.Component.processEvent(Component.java:6290)
   at java.awt.Container.processEvent(Container.java:2234)
   at java.awt.Component.dispatchEventImpl(Component.java:4881)
   at java.awt.Container.dispatchEventImpl(Container.java:2292)
   at java.awt.Component.dispatchEvent(Component.java:4703)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4898)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4533)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4462)
   at java.awt.Container.dispatchEventImpl(Container.java:2278)
   at java.awt.Window.dispatchEventImpl(Window.java:2750)
   at java.awt.Component.dispatchEvent(Component.java:4703)
   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(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
   at java.awt.EventQueue$4.run(EventQueue.java:731)
   at java.awt.EventQueue$4.run(EventQueue.java:729)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   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)