java.lang.AssertionError
   at com.sun.tools.javac.util.Assert.error(Assert.java:155)
   at com.sun.tools.javac.util.Assert.check(Assert.java:46)
   at com.sun.tools.javac.comp.Lower.access(Lower.java:1134)
   at com.sun.tools.javac.comp.Lower.visitIdent(Lower.java:3324)
   at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:2194)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitSelect(Lower.java:3787)
   at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2075)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:3022)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1604)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2298)
   at com.sun.tools.javac.comp.Lower.visitVarDef(Lower.java:3496)
   at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:926)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.comp.Lower.visitForLoop(Lower.java:3527)
   at com.sun.tools.javac.tree.JCTree$JCForLoop.accept(JCTree.java:1090)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitIterableForeachLoop(Lower.java:3477)
   at com.sun.tools.javac.comp.Lower.visitForeachLoop(Lower.java:3330)
   at com.sun.tools.javac.tree.JCTree$JCEnhancedForLoop.accept(JCTree.java:1130)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:167)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3510)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:150)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2743)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2653)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:842)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2424)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:748)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitNewClass(Lower.java:2816)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1659)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2298)
   at com.sun.tools.javac.comp.Lower.boxArgs(Lower.java:3065)
   at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:2964)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1604)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:250)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1422)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:167)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3510)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:150)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2743)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2653)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:842)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2424)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:748)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitNewClass(Lower.java:2816)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1659)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2298)
   at com.sun.tools.javac.comp.Lower.boxArgs(Lower.java:3065)
   at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:2964)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1604)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:250)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1422)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:167)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3510)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:990)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:150)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2743)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2653)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:842)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2424)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:748)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2287)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2306)
   at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3879)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1545)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1378)
   at com.sun.tools.javac.api.JavacTaskImpl$6.process(JavacTaskImpl.java:539)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:607)
   at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:542)
   at org.netbeans.modules.java.source.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:304)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:251)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:161)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:296)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:159)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2753)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$500(RepositoryUpdater.java:2157)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2639)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2637)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:565)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2637)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork$4.call(RepositoryUpdater.java:5704)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork$4.call(RepositoryUpdater.java:5612)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$4.run(RepositoryUpdater.java:2130)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2126)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:2107)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.access$1200(RepositoryUpdater.java:157)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSource(RepositoryUpdater.java:5739)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSources(RepositoryUpdater.java:5409)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:5028)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3410)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:6173)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4300(RepositoryUpdater.java:5824)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:6089)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:106)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6085)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:6081)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:88)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:6081)
   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: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)