java.lang.AssertionError at com.sun.tools.javac.code.Types$10.visitType(Types.java:1508) at com.sun.tools.javac.code.Types$10.visitType(Types.java:1491) at com.sun.tools.javac.code.Type.accept(Type.java:169) at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4392) at com.sun.tools.javac.code.Types.isCastable(Types.java:1482) at com.sun.tools.javac.comp.Check.checkCastable(Check.java:585) at com.sun.tools.javac.comp.Check.checkCastable(Check.java:582) at com.sun.tools.javac.comp.Attr.visitTypeCast(Attr.java:3258) at com.sun.tools.javac.tree.JCTree$JCTypeCast.accept(JCTree.java:1805) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:589) at com.sun.tools.javac.comp.Attr.visitReturn(Attr.java:1731) at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1384) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:589) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:658) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:674) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1159) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:589) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:658) at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1041) at org.netbeans.lib.nbjavac.services.NBAttr.visitMethodDef(NBAttr.java:76) at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:589) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:658) at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4482) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4379) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4313) at com.sun.tools.javac.comp.Attr.visitClassDef(Attr.java:883) at org.netbeans.lib.nbjavac.services.NBAttr.visitClassDef(NBAttr.java:70) at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:692) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:589) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:658) at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4482) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4379) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4313) at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4287) at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1288) at com.sun.tools.javac.api.JavacTaskImpl$1.process(JavacTaskImpl.java:473) at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:623) at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:476) at org.netbeans.modules.java.source.TreeLoader.loadTreeFor(TreeLoader.java:183) at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1278) at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1245) at org.netbeans.modules.java.navigation.ElementScanningTask.createHtmlHeader(ElementScanningTask.java:316) at org.netbeans.modules.java.navigation.ElementScanningTask.element2description(ElementScanningTask.java:259) at org.netbeans.modules.java.navigation.ElementScanningTask.addMembers(ElementScanningTask.java:227) at org.netbeans.modules.java.navigation.ElementScanningTask.runImpl(ElementScanningTask.java:146) at org.netbeans.modules.java.navigation.ElementScanningTask.run(ElementScanningTask.java:104) at org.netbeans.modules.java.navigation.ElementScanningTask.run(ElementScanningTask.java:85) at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298) at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:568) at org.netbeans.modules.parsing.impl.TaskProcessor$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:1432) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)