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:1058)
   at com.sun.tools.javac.comp.Lower.visitIdent(Lower.java:3154)
   at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:1710)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.visitSelect(Lower.java:3616)
   at com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:1682)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.visitApply(Lower.java:2846)
   at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1326)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.tree.TreeTranslator.visitExec(TreeTranslator.java:243)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1172)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:160)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3338)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:786)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:144)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2634)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2552)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:674)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2295)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:595)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.visitNewClass(Lower.java:2693)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1377)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2184)
   at com.sun.tools.javac.comp.Lower.visitVarDef(Lower.java:3324)
   at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:730)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:70)
   at com.sun.tools.javac.tree.TreeTranslator.visitBlock(TreeTranslator.java:160)
   at com.sun.tools.javac.comp.Lower.visitBlock(Lower.java:3338)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:786)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.tree.TreeTranslator.visitMethodDef(TreeTranslator.java:144)
   at com.sun.tools.javac.comp.Lower.visitMethodDefInternal(Lower.java:2634)
   at com.sun.tools.javac.comp.Lower.visitMethodDef(Lower.java:2552)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:674)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2295)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:595)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.visitClassDef(Lower.java:2295)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:595)
   at com.sun.tools.javac.tree.TreeTranslator.translate(TreeTranslator.java:58)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2172)
   at com.sun.tools.javac.comp.Lower.translate(Lower.java:2192)
   at com.sun.tools.javac.comp.Lower.translateTopLevelClass(Lower.java:3678)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1442)
   at com.sun.tools.javac.main.JavaCompiler.desugar(JavaCompiler.java:1314)
   at com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:532)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:620)
   at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:535)
   at org.netbeans.modules.java.source.indexing.OnePassCompileWorker.compile(OnePassCompileWorker.java:257)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:200)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:162)
   at org.netbeans.modules.java.source.usages.ClassIndexManager.prepareWriteLock(ClassIndexManager.java:120)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:162)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:157)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:262)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:155)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2148)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1500(RepositoryUpdater.java:1857)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2058)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2056)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:462)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2056)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:2516)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:2807)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2587)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:4663)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:4600)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:618)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:728)
   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 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:722)