java.lang.IllegalArgumentException: <none>
        at com.sun.tools.javac.model.JavacTypes.getWildcardType(JavacTypes.java:209)
        at org.netbeans.api.java.source.TypeMirrorHandle.resolve(TypeMirrorHandle.java:307)
        at org.netbeans.api.java.source.TypeMirrorHandle.resolve(TypeMirrorHandle.java:263)
        at org.netbeans.api.java.source.TypeMirrorHandle.resolve(TypeMirrorHandle.java:294)
        at org.netbeans.api.java.source.TypeMirrorHandle.resolve(TypeMirrorHandle.java:263)
        at org.netbeans.api.java.source.TypeMirrorHandle.resolve(TypeMirrorHandle.java:218)
        at org.netbeans.modules.editor.java.JavaCompletionItem$ClassItem$1.run(JavaCompletionItem.java:719)
        at org.netbeans.modules.editor.java.JavaCompletionItem$ClassItem$1.run(JavaCompletionItem.java:717)
        at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:674)
        at org.netbeans.modules.editor.java.JavaCompletionItem$ClassItem.substituteText(JavaCompletionItem.java:715)
        at org.netbeans.modules.editor.java.JavaCompletionItem.defaultAction(JavaCompletionItem.java:247)
        at org.netbeans.modules.editor.completion.CompletionImpl.dispatchKeyEvent(CompletionImpl.java:564)
        at org.netbeans.modules.editor.completion.CompletionImpl.keyPressed(CompletionImpl.java:364)
        at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:233)
        at java.awt.AWTEventMulticaster.keyPressed(AWTEventMulticaster.java:232)
        at java.awt.Component.processKeyEvent(Component.java:5999)
        at javax.swing.JComponent.processKeyEvent(JComponent.java:2799)
        at java.awt.Component.processEvent(Component.java:5818)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4413)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:697)
        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:962)
        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:834)
        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:661)
        at java.awt.Component.dispatchEventImpl(Component.java:4285)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Window.dispatchEventImpl(Window.java:2440)
        at java.awt.Component.dispatchEvent(Component.java:4243)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)