java.lang.AssertionError
   at com.sun.tools.javac.util.Assert.error(Assert.java:155)
   at com.sun.tools.javac.util.Assert.checkNonNull(Assert.java:62)
   at com.sun.tools.javac.comp.Check.validateTypeAnnotation(Check.java:2903)
   at com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitAnnotation(Attr.java:4910)
   at com.sun.tools.javac.tree.JCTree$JCAnnotation.accept(JCTree.java:2553)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
   at com.sun.tools.javac.tree.TreeScanner.visitModifiers(TreeScanner.java:353)
   at com.sun.tools.javac.tree.JCTree$JCModifiers.accept(JCTree.java:2582)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitVarDef(Attr.java:4951)
   at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:956)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
   at com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitBlock(Attr.java:5008)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1020)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.tree.TreeScanner.visitForLoop(TreeScanner.java:160)
   at com.sun.tools.javac.tree.JCTree$JCForLoop.accept(JCTree.java:1120)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
   at com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitBlock(Attr.java:5008)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1020)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.tree.TreeScanner.visitIf(TreeScanner.java:208)
   at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1421)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
   at com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitBlock(Attr.java:5008)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1020)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitMethodDef(Attr.java:4944)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:872)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Attr$TypeAnnotationsValidator.visitClassDef(Attr.java:5003)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:778)
   at com.sun.tools.javac.comp.Attr.validateTypeAnnotations(Attr.java:4899)
   at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4823)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4669)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4597)
   at com.sun.tools.javac.comp.Attr.visitClassDef(Attr.java:952)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitClassDef(NBAttr.java:70)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:778)
   at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:502)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:643)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:713)
   at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4785)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4669)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4597)
   at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4542)
   at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1434)
   at com.sun.tools.javac.api.JavacTaskImpl$1.process(JavacTaskImpl.java:478)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:619)
   at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:481)
   at org.netbeans.modules.java.source.TreeLoader.loadTreeFor(TreeLoader.java:206)
   at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1696)
   at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1663)
   at org.netbeans.modules.java.navigation.ElementScanningTask.createHtmlHeader(ElementScanningTask.java:522)
   at org.netbeans.modules.java.navigation.ElementScanningTask.element2description(ElementScanningTask.java:384)
   at org.netbeans.modules.java.navigation.ElementScanningTask.addMembers(ElementScanningTask.java:334)
   at org.netbeans.modules.java.navigation.ElementScanningTask.addMembers(ElementScanningTask.java:340)
   at org.netbeans.modules.java.navigation.ElementScanningTask.runImpl(ElementScanningTask.java:182)
   at org.netbeans.modules.java.navigation.ElementScanningTask.run(ElementScanningTask.java:121)
   at org.netbeans.modules.java.navigation.ElementScanningTask.run(ElementScanningTask.java:102)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:809)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:725)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:686)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
   at java.util.concurrent.FutureTask.run(FutureTask.java:264)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)