java.lang.AssertionError
   at com.sun.tools.javac.util.Assert.error(Assert.java:155)
   at com.sun.tools.javac.util.Assert.checkNonNull(Assert.java:62)
   at com.sun.tools.javac.comp.Annotate.fromAnnotations(Annotate.java:149)
   at com.sun.tools.javac.comp.Annotate$6.run(Annotate.java:1020)
   at com.sun.tools.javac.comp.Annotate.flush(Annotate.java:176)
   at com.sun.tools.javac.comp.Annotate.unblockAnnotations(Annotate.java:130)
   at com.sun.tools.javac.comp.Enter.classEnter(Enter.java:305)
   at com.sun.tools.javac.comp.Attr.visitClassDef(Attr.java:914)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitClassDef(NBAttr.java:70)
   at com.sun.tools.javac.tree.JCTree$JCClassDecl.accept(JCTree.java:748)
   at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:496)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:637)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:707)
   at com.sun.tools.javac.comp.Attr.visitAnonymousClassDefinition(Attr.java:2359)
   at com.sun.tools.javac.comp.Attr.visitNewClass(Attr.java:2243)
   at com.sun.tools.javac.tree.JCTree$JCNewClass.accept(JCTree.java:1659)
   at com.sun.tools.javac.comp.Attr$ResultInfo.attr(Attr.java:496)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:637)
   at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:676)
   at org.netbeans.modules.java.hints.spiimpl.Utilities.attributeTree(Utilities.java:667)
   at org.netbeans.modules.java.hints.spiimpl.Utilities.parseAndAttribute(Utilities.java:447)
   at org.netbeans.modules.java.hints.spiimpl.Utilities.parseAndAttribute(Utilities.java:362)
   at org.netbeans.modules.java.hints.spiimpl.Utilities.parseAndAttribute(Utilities.java:342)
   at org.netbeans.modules.java.hints.spiimpl.Utilities.parseAndAttribute(Utilities.java:338)
   at org.netbeans.modules.java.hints.spiimpl.pm.PatternCompiler.compile(PatternCompiler.java:67)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.doComputeHints(HintsInvoker.java:558)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHintsImpl(HintsInvoker.java:306)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:251)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:216)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:189)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsInvoker.computeHints(HintsInvoker.java:151)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:137)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:88)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   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)