java.lang.AssertionError
   at com.sun.tools.javac.comp.Lower.classOfType(Lower.java:2125)
   at com.sun.tools.javac.comp.Lower.assertFlagTest(Lower.java:2162)
   at com.sun.tools.javac.comp.Lower.visitAssert(Lower.java:2916)
   at com.sun.tools.javac.tree.JCTree$JCAssert.accept(JCTree.java:1430)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2296)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:162)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3500)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:907)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2296)
   at com.sun.tools.javac.comp.Lower.visitIf(Lower.java:2904)
   at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1267)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2296)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:162)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3500)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:907)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2296)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:145)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2744)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2656)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:776)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2296)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2427)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:690)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2296)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2427)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:690)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2296)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2315)
   at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3858)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1538)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1393)
   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.SuperOnePassCompileWorker.compile(SuperOnePassCompileWorker.java:275)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:246)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:161)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:282)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:159)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2612)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1400(RepositoryUpdater.java:2077)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2502)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2500)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:544)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2500)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:3089)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3544)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3205)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5643)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4900(RepositoryUpdater.java:5309)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3$1.run(RepositoryUpdater.java:5568)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:96)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5564)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5560)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5560)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)