java.lang.NullPointerException
        at javax.swing.ScrollPaneLayout.preferredLayoutSize(ScrollPaneLayout.java:494)
        at java.awt.Container.preferredSize(Container.java:1661)
        at java.awt.Container.getPreferredSize(Container.java:1646)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1645)
        at org.netbeans.modules.editor.hints.borrowed.ScrollCompletionPane.<init>(ScrollCompletionPane.java:104)
        at org.netbeans.modules.editor.hints.HintsUI.showPopup(HintsUI.java:284)
        at org.netbeans.modules.editor.hints.HintsUI.invokeDefaultAction(HintsUI.java:436)
        at org.netbeans.modules.editor.hints.FixAction.actionPerformed(FixAction.java:64)
        at org.netbeans.modules.java.editor.overridden.IsOverriddenAnnotationAction.actionPerformed(IsOverriddenAnnotationAction.java:91)
        at org.netbeans.editor.GlyphGutter$GutterMouseListener.mouseClicked(GlyphGutter.java:738)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:269)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:269)
        at java.awt.Component.processMouseEvent(Component.java:6110)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3287)
        at java.awt.Component.processEvent(Component.java:5872)
        at java.awt.Container.processEvent(Container.java:2101)
        at java.awt.Component.dispatchEventImpl(Component.java:4467)
        at java.awt.Container.dispatchEventImpl(Container.java:2159)
        at java.awt.Component.dispatchEvent(Component.java:4293)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4578)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4250)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4171)
        at java.awt.Container.dispatchEventImpl(Container.java:2145)
        at java.awt.Window.dispatchEventImpl(Window.java:2559)
        at java.awt.Component.dispatchEvent(Component.java:4293)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:604)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)