java.lang.NullPointerException
        at javax.swing.ScrollPaneLayout.preferredLayoutSize(ScrollPaneLayout.java:494)
        at java.awt.Container.preferredSize(Container.java:1669)
        at java.awt.Container.getPreferredSize(Container.java:1654)
        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 javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
        at javax.swing.AbstractButton.doClick(AbstractButton.java:374)
        at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1688)
        at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1732)
        at java.awt.Component.processMouseEvent(Component.java:6099)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3287)
        at java.awt.Component.processEvent(Component.java:5864)
        at java.awt.Container.processEvent(Container.java:2109)
        at java.awt.Component.dispatchEventImpl(Component.java:4460)
        at java.awt.Container.dispatchEventImpl(Container.java:2167)
        at java.awt.Component.dispatchEvent(Component.java:4286)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4465)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4129)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4059)
        at java.awt.Container.dispatchEventImpl(Container.java:2153)
        at java.awt.Window.dispatchEventImpl(Window.java:2554)
        at java.awt.Component.dispatchEvent(Component.java:4286)
        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)