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.jvm.Code$State.forceStackTop(Code.java:1723)
   at com.sun.tools.javac.jvm.Gen.visitConditional(Gen.java:1715)
   at com.sun.tools.javac.tree.JCTree$JCConditional.accept(JCTree.java:1113)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:840)
   at com.sun.tools.javac.jvm.Gen.visitReturn(Gen.java:1662)
   at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1245)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:687)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:722)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:708)
   at com.sun.tools.javac.jvm.Gen.genStats(Gen.java:759)
   at com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1034)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:786)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:687)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:722)
   at com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:915)
   at com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:888)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:674)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:687)
   at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2235)
   at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:724)
   at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1497)
   at com.sun.tools.javac.api.JavacTaskImpl$2.process(JavacTaskImpl.java:534)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:622)
   at com.sun.tools.javac.api.JavacTaskImpl.generate(JavacTaskImpl.java:537)
   at org.netbeans.modules.java.source.indexing.OnePassCompileWorker.compile(OnePassCompileWorker.java:265)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:223)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:158)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:259)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:156)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2436)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1500(RepositoryUpdater.java:2045)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2343)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2341)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:541)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2341)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:2841)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3201)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2931)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5166)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4800(RepositoryUpdater.java:4858)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:5103)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:97)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5099)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5095)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:72)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5095)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)