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:2854)
   at com.sun.tools.javac.comp.Flow$AbstractAssignAnalyzer.visitMethodDef(Flow.java:1778)
   at com.sun.tools.javac.jvm.Gen$LVTAssignAnalyzer.visitMethodDef(Gen.java:2905)
   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:2513)
   at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:774)
   at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1633)
   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:374)
   at org.netbeans.modules.java.source.TreeLoader.dumpSymFile(TreeLoader.java:351)
   at org.netbeans.modules.java.source.TreeLoader.loadTreeFor(TreeLoader.java:188)
   at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1288)
   at com.sun.tools.javac.code.Symbol$ParamSymbol.getSimpleName(Symbol.java:1255)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.getMatchingParams(JavaCompletionProvider.java:5320)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.resolveToolTip(JavaCompletionProvider.java:576)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.run(JavaCompletionProvider.java:450)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery$Task.run(JavaCompletionProvider.java:5875)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:593)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:206)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:203)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:203)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.editor.java.JavaCompletionProvider$JavaCompletionQuery.query(JavaCompletionProvider.java:318)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)