java.lang.NullPointerException at com.sun.tools.javac.comp.MemberEnter$Synthesizer.visit(MemberEnter.java:1715) at com.sun.tools.javac.comp.MemberEnter$9.getModelType(MemberEnter.java:1697) at com.sun.tools.javac.code.Symbol$ClassSymbol.getSuperclass(Symbol.java:1087) at com.sun.tools.javac.code.Symbol$ClassSymbol.getSuperclass(Symbol.java:919) at org.netbeans.modules.java.hints.ExportNonAccessibleElement.visitType(ExportNonAccessibleElement.java:222) at org.netbeans.modules.java.hints.ExportNonAccessibleElement.visitType(ExportNonAccessibleElement.java:92) at com.sun.tools.javac.code.Symbol$ClassSymbol.accept(Symbol.java:1172) at org.netbeans.modules.java.hints.ExportNonAccessibleElement.run(ExportNonAccessibleElement.java:113) at org.netbeans.modules.java.hints.legacy.spi.RulesManager$WorkerImpl.createErrors(RulesManager.java:411) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.runHint(HintsInvoker.java:798) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.access$400(HintsInvoker.java:111) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.runAndAdd(HintsInvoker.java:657) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:676) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:614) at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:81) at com.sun.source.util.TreeScanner.scan(TreeScanner.java:91) at org.netbeans.api.java.source.support.CancellableTreePathScanner.scan(CancellableTreePathScanner.java:103) at com.sun.source.util.TreeScanner.scanAndReduce(TreeScanner.java:99) at com.sun.source.util.TreeScanner.visitCompilationUnit(TreeScanner.java:120) at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:551) at com.sun.source.util.TreePathScanner.scan(TreePathScanner.java:50) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker$ScannerImpl.scan(HintsInvoker.java:701) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHintsImpl(HintsInvoker.java:256) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:239) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:209) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:182) at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:149) at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:114) at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:83) at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298) at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:573) at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:744) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)