java.lang.NullPointerException
        at org.netbeans.modules.search.BasicSearchForm.updateWarningBackrefState(BasicSearchForm.java:580)
        at org.netbeans.modules.search.BasicSearchForm.initInteraction(BasicSearchForm.java:470)
        at org.netbeans.modules.search.BasicSearchForm.<init>(BasicSearchForm.java:130)
        at org.netbeans.modules.search.SearchPanel.<init>(SearchPanel.java:174)
        at org.netbeans.modules.search.SearchPanel.<init>(SearchPanel.java:130)
        at org.netbeans.modules.search.FindInFilesAction.performAction(FindInFilesAction.java:335)
        at org.netbeans.modules.search.FindInFilesAction.access$100(FindInFilesAction.java:94)
        at org.netbeans.modules.search.FindInFilesAction$LookupSensitive.actionPerformed(FindInFilesAction.java:434)
        at org.openide.windows.TopComponent.processKeyBinding(TopComponent.java:1007)
        at javax.swing.JComponent.processKeyBindings(JComponent.java:2818)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2735)
        at java.awt.Component.processEvent(Component.java:5379)
        at java.awt.Container.processEvent(Container.java:2010)
        at java.awt.Component.dispatchEventImpl(Component.java:4068)
        at java.awt.Container.dispatchEventImpl(Container.java:2068)
        at java.awt.Component.dispatchEvent(Component.java:3903)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1826)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:681)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:938)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:810)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:645)
        at java.awt.Component.dispatchEventImpl(Component.java:3941)
        at java.awt.Container.dispatchEventImpl(Container.java:2068)
        at java.awt.Window.dispatchEventImpl(Window.java:1791)
        at java.awt.Component.dispatchEvent(Component.java:3903)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)