java.lang.AssertionError
   at com.sun.tools.javac.code.Symbol.clone(Symbol.java:257)
   at com.sun.tools.javac.jvm.Gen.binaryQualifier(Gen.java:302)
   at com.sun.tools.javac.jvm.Gen.visitIdent(Gen.java:2295)
   at com.sun.tools.javac.tree.JCTree$JCIdent.accept(JCTree.java:1995)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:935)
   at com.sun.tools.javac.jvm.Gen.visitBinary(Gen.java:2132)
   at com.sun.tools.javac.tree.JCTree$JCBinary.accept(JCTree.java:1776)
   at com.sun.tools.javac.jvm.Gen.genExpr(Gen.java:935)
   at com.sun.tools.javac.jvm.Gen.genCond(Gen.java:858)
   at com.sun.tools.javac.jvm.Gen.genCond(Gen.java:811)
   at com.sun.tools.javac.jvm.Gen.visitIf(Gen.java:1731)
   at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1269)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:725)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:760)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:746)
   at com.sun.tools.javac.jvm.Gen.genStats(Gen.java:797)
   at com.sun.tools.javac.jvm.Gen.visitBlock(Gen.java:1145)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:909)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:725)
   at com.sun.tools.javac.jvm.Gen.genStat(Gen.java:760)
   at com.sun.tools.javac.jvm.Gen.genMethod(Gen.java:1020)
   at com.sun.tools.javac.jvm.Gen.visitMethodDef(Gen.java:983)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
   at com.sun.tools.javac.jvm.Gen.genDef(Gen.java:725)
   at com.sun.tools.javac.jvm.Gen.genClass(Gen.java:2431)
   at com.sun.tools.javac.main.JavaCompiler.genCode(JavaCompiler.java:741)
   at com.sun.tools.javac.main.JavaCompiler.generate(JavaCompiler.java:1600)
   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:0)
   at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:0)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$400(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.call(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$3.run(RepositoryUpdater.java:0)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runInContext(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.access$1100(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4300(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3$1.run(RepositoryUpdater.java:0)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:0)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:0)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:0)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:0)
   at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:0)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:0)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:0)
   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:0)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:0)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:0)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:0)