java.lang.AssertionError
   at com.sun.tools.javac.util.Assert.error(Assert.java:155)
   at com.sun.tools.javac.util.Assert.check(Assert.java:46)
   at com.sun.tools.javac.code.Symbol$ClassSymbol.setAnnotationTypeMetadata(Symbol.java:1282)
   at com.sun.tools.javac.comp.TypeEnter$MembersPhase.finishClass(TypeEnter.java:924)
   at com.sun.tools.javac.comp.TypeEnter$MembersPhase.runPhase(TypeEnter.java:901)
   at com.sun.tools.javac.comp.TypeEnter$Phase.doCompleteEnvs(TypeEnter.java:278)
   at com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:256)
   at com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:262)
   at com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:262)
   at com.sun.tools.javac.comp.TypeEnter$Phase.completeEnvs(TypeEnter.java:262)
   at com.sun.tools.javac.comp.TypeEnter.complete(TypeEnter.java:210)
   at com.sun.tools.javac.code.Symbol.complete(Symbol.java:590)
   at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:1105)
   at com.sun.tools.javac.code.Symbol$ClassSymbol.flags(Symbol.java:1030)
   at com.sun.tools.javac.code.Symbol$TypeSymbol.getEnclosedElements(Symbol.java:757)
   at org.netbeans.modules.java.editor.overridden.ComputeOverriding.sortOutMethods(ComputeOverriding.java:153)
   at org.netbeans.modules.java.editor.overridden.ComputeOverriding.sortOutMethods(ComputeOverriding.java:187)
   at org.netbeans.modules.java.editor.overridden.ComputeOverriding.compute(ComputeOverriding.java:211)
   at org.netbeans.modules.java.editor.overridden.ComputeOverriding.process(ComputeOverriding.java:132)
   at org.netbeans.modules.java.editor.overridden.ComputeAnnotations.computeAnnotations(ComputeAnnotations.java:126)
   at org.netbeans.modules.java.editor.overridden.ComputeAnnotations.run(ComputeAnnotations.java:108)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.run(TaskProcessor.java:809)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:304)
   at org.netbeans.modules.parsing.impl.TaskProcessor$RequestPerformer.execute(TaskProcessor.java:725)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:686)
   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:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)