java.lang.NullPointerException
        at com.sun.tools.javac.code.Types$14.visitClassType(Types.java:1279)
        at com.sun.tools.javac.code.Types$14.visitClassType(Types.java:1300)
        at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:553)
        at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3157)
        at com.sun.tools.javac.code.Types.asSuper(Types.java:1259)
        at com.sun.tools.javac.code.Types$14.visitClassType(Types.java:1275)
        at com.sun.tools.javac.code.Types$14.visitClassType(Types.java:1300)
        at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:553)
        at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3157)
        at com.sun.tools.javac.code.Types.asSuper(Types.java:1259)
        at com.sun.tools.javac.code.Types$14.visitClassType(Types.java:1275)
        at com.sun.tools.javac.code.Types$14.visitClassType(Types.java:1300)
        at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:553)
        at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3157)
        at com.sun.tools.javac.code.Types.asSuper(Types.java:1259)
        at com.sun.tools.javac.code.Types$5.visitClassType(Types.java:405)
        at com.sun.tools.javac.code.Types$5.visitClassType(Types.java:452)
        at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:553)
        at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3157)
        at com.sun.tools.javac.code.Types.isSubtype(Types.java:328)
        at com.sun.tools.javac.code.Types.isSubtypeNoCapture(Types.java:315)
        at com.sun.tools.javac.code.Types$5.visitClassType(Types.java:406)
        at com.sun.tools.javac.code.Types$5.visitClassType(Types.java:452)
        at com.sun.tools.javac.code.Type$ClassType.accept(Type.java:553)
        at com.sun.tools.javac.code.Types$DefaultTypeVisitor.visit(Types.java:3157)
        at com.sun.tools.javac.code.Types.isSubtype(Types.java:328)
        at com.sun.tools.javac.code.Types.isSubtype(Types.java:312)
        at com.sun.tools.javac.code.Types.isSubtypeUnchecked(Types.java:292)
        at com.sun.tools.javac.comp.Resolve.argumentsAcceptable(Resolve.java:353)
        at com.sun.tools.javac.comp.Resolve.rawInstantiate(Resolve.java:319)
        at com.sun.tools.javac.comp.Resolve.selectBest(Resolve.java:542)
        at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:732)
        at com.sun.tools.javac.comp.Resolve.findMethod(Resolve.java:698)
        at com.sun.tools.javac.comp.Resolve.resolveConstructor(Resolve.java:1300)
        at com.sun.tools.javac.comp.Resolve.resolveConstructor(Resolve.java:1272)
        at com.sun.tools.javac.comp.Attr.visitApply(Attr.java:1229)
        at com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1214)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:370)
        at com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:394)
        at com.sun.tools.javac.comp.Attr.visitExec(Attr.java:1032)
        at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1078)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:370)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:407)
        at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:423)
        at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:728)
        at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:743)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:370)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:407)
        at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:646)
        at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:643)
        at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:370)
        at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:407)
        at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:2711)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2642)
        at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:2575)
        at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1045)
        at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1021)
        at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:427)
        at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:407)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.updateFile(RepositoryUpdater.java:1533)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.access$2100(RepositoryUpdater.java:866)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:1096)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker$1.run(RepositoryUpdater.java:895)
        at org.netbeans.modules.java.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:78)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:892)
        at org.netbeans.modules.java.source.usages.RepositoryUpdater$CompileWorker.run(RepositoryUpdater.java:866)
[catch] at org.netbeans.api.java.source.JavaSource$CompilationJob.run(JavaSource.java:1354)
        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 java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)