java.lang.AssertionError: isSameType UNKNOWN
   at com.sun.tools.javac.code.Types$SameTypeVisitor.visitType(Types.java:1121)
   at com.sun.tools.javac.code.Types$SameTypeVisitor.visitType(Types.java:1093)
   at com.sun.tools.javac.code.Type.accept(Type.java:189)
   at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4498)
   at com.sun.tools.javac.code.Types$SameTypeVisitor.visitType(Types.java:1100)
   at com.sun.tools.javac.code.Types$SameTypeVisitor.visitType(Types.java:1093)
   at com.sun.tools.javac.code.Type.accept(Type.java:189)
   at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:4498)
   at com.sun.tools.javac.code.Types.isSameType(Types.java:1085)
   at com.sun.tools.javac.code.Types.isSameType(Types.java:1082)
   at com.sun.tools.javac.comp.Attr.condType(Attr.java:1523)
   at com.sun.tools.javac.comp.Attr.visitConditional(Attr.java:1463)
   at com.sun.tools.javac.tree.JCTree$JCConditional.accept(JCTree.java:1243)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:614)
   at com.sun.tools.javac.comp.Attr.visitAssign(Attr.java:3081)
   at com.sun.tools.javac.tree.JCTree$JCAssign.accept(JCTree.java:1692)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:621)
   at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1608)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1302)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:657)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1130)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:915)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.visitIf(Attr.java:1597)
   at com.sun.tools.javac.tree.JCTree$JCIf.accept(JCTree.java:1275)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:657)
   at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1130)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82)
   at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:915)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1014)
   at org.netbeans.lib.nbjavac.services.NBAttr.visitMethodDef(NBAttr.java:76)
   at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:784)
   at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572)
   at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641)
   at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4559)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4461)
   at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4389)
   at com.sun.tools.javac.comp.Attr.attrib(Attr.java:4364)
   at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1317)
   at com.sun.tools.javac.api.JavacTaskImpl$1.process(JavacTaskImpl.java:473)
   at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:623)
   at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:476)
   at org.netbeans.modules.java.source.TreeLoader.loadTreeFor(TreeLoader.java:199)
   at com.sun.tools.javac.model.JavacElements.getTreeAndTopLevel(JavacElements.java:588)
   at com.sun.tools.javac.model.JavacElements.getTreeAndTopLevel(JavacElements.java:614)
   at com.sun.tools.javac.api.JavacTrees.getTree(JavacTrees.java:312)
   at com.sun.tools.javac.api.JavacTrees.getTree(JavacTrees.java:308)
   at com.sun.tools.javac.api.JavacTrees.getTree(JavacTrees.java:304)
   at com.sun.tools.javac.api.JavacTrees.getTree(JavacTrees.java:124)
   at org.netbeans.modules.java.editor.overridden.ComputeAnnotations.createAnnotations(ComputeAnnotations.java:137)
   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:471)
   at java.util.concurrent.FutureTask.run(FutureTask.java:262)
   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)