java.lang.AssertionError: Value of x -1
   at com.sun.tools.javac.util.Assert.error(Assert.java:133)
   at com.sun.tools.javac.util.Assert.check(Assert.java:94)
   at com.sun.tools.javac.util.Bits.incl(Bits.java:186)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.initParam(Flow.java:1824)
   at com.sun.tools.javac.jvm.Gen$LVTAssignAnalyzer.initParam(Gen.java:2863)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitMethodDef(Flow.java:1778)
   at com.sun.tools.javac.jvm.Gen$LVTAssignAnalyzer.visitMethodDef(Gen.java:2916)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:409)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1393)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitClassDef(Flow.java:1734)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:692)
   at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
   at com.sun.tools.javac.comp.Flow$BaseAnalyzer.scan(Flow.java:409)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.scan(Flow.java:1393)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.analyzeTree(Flow.java:2409)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.analyzeTree(Flow.java:2392)
   at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2522)
   at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:768)
   at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1649)
   at com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:535)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:623)
   at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:538)
   at org.netbeans.modules.java.source.TreeLoader.dumpSymFile(TreeLoader.java:380)
   at org.netbeans.modules.java.source.TreeLoader.dumpSymFile(TreeLoader.java:357)
   at org.netbeans.modules.java.source.TreeLoader.loadTreeFor(TreeLoader.java:194)
   at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1341)
   at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1308)
   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$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask.run(FutureTask.java:262)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)