java.lang.AssertionError
   at com.sun.tools.javac.util.Assert.error(Assert.java:126)
   at com.sun.tools.javac.util.Assert.check(Assert.java:45)
   at com.sun.tools.javac.comp.Lower.access(Lower.java:1138)
   at com.sun.tools.javac.comp.Lower.visitIdent(Lower.java:3367)
   at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:2011)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.visitSelect(Lower.java:3835)
   at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1897)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:3056)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1465)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2369)
   at com.sun.tools.javac.comp.Lower.boxArgs(Lower.java:3099)
   at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:2998)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1465)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:245)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1296)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:162)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3556)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:145)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2811)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2719)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2489)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:692)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.visitNewClass(Lower.java:2898)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1516)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2369)
   at com.sun.tools.javac.comp.Lower.visitReturn(Lower.java:3583)
   at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1384)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:162)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3556)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:145)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2811)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2719)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2489)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:692)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2358)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2377)
   at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3927)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1587)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1419)
   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.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:309)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:248)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:161)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:283)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:159)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2650)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1600(RepositoryUpdater.java:2091)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2539)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2537)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:544)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2537)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSource(RepositoryUpdater.java:5353)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSources(RepositoryUpdater.java:5062)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:4717)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3267)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5796)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$5300(RepositoryUpdater.java:5462)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3$1.run(RepositoryUpdater.java:5721)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:96)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5717)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5713)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5713)
   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)