java.lang.NullPointerException
        at com.sun.tools.javac.tree.TreeInfo$1DeclScanner.visitTypeParameter(TreeInfo.java:502)
        at com.sun.tools.javac.tree.JCTree$JCTypeParameter.accept(JCTree.java:1875)
        at com.sun.tools.javac.tree.TreeInfo$1DeclScanner.scan(TreeInfo.java:483)
        at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:58)
        at com.sun.tools.javac.tree.TreeScanner.visitMethodDef(TreeScanner.java:87)
        at com.sun.tools.javac.tree.TreeInfo$1DeclScanner.visitMethodDef(TreeInfo.java:495)
        at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:658)
        at com.sun.tools.javac.tree.TreeInfo$1DeclScanner.scan(TreeInfo.java:483)
        at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:58)
        at com.sun.tools.javac.tree.TreeScanner.visitClassDef(TreeScanner.java:81)
        at com.sun.tools.javac.tree.TreeInfo$1DeclScanner.visitClassDef(TreeInfo.java:491)
        at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:590)
        at com.sun.tools.javac.tree.TreeInfo.declarationFor(TreeInfo.java:507)
        at com.sun.tools.javac.model.JavacElements.getTreeAndTopLevel(JavacElements.java:633)
        at com.sun.tools.javac.model.JavacElements.getTreeAndTopLevel(JavacElements.java:653)
        at com.sun.tools.javac.api.JavacTrees.getPath(JavacTrees.java:168)
        at com.sun.tools.javac.api.JavacTrees.getPath(JavacTrees.java:160)
        at org.netbeans.modules.editor.java.GoToSupport$1.run(GoToSupport.java:245)
        at org.netbeans.modules.editor.java.GoToSupport$1.run(GoToSupport.java:132)
        at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:616)
        at org.netbeans.modules.editor.java.GoToSupport.performGoTo(GoToSupport.java:131)
        at org.netbeans.modules.editor.java.GoToSupport.goTo(GoToSupport.java:296)
        at org.netbeans.modules.java.editor.hyperlink.JavaHyperlinkProvider.performClickAction(JavaHyperlinkProvider.java:79)
        at org.netbeans.lib.editor.hyperlink.HyperlinkOperation.performAction(HyperlinkOperation.java:253)
        at org.netbeans.lib.editor.hyperlink.HyperlinkOperation.mouseClicked(HyperlinkOperation.java:396)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:212)
        at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:211)
        at java.awt.Component.processMouseEvent(Component.java:5491)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
        at java.awt.Component.processEvent(Component.java:5253)
        at java.awt.Container.processEvent(Container.java:1966)
        at java.awt.Component.dispatchEventImpl(Component.java:3955)
        at java.awt.Container.dispatchEventImpl(Container.java:2024)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4212)
        at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:3901)
        at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:3822)
        at java.awt.Container.dispatchEventImpl(Container.java:2010)
        at java.awt.Window.dispatchEventImpl(Window.java:1774)
        at java.awt.Component.dispatchEvent(Component.java:3803)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)