My self invoking anonymous function
(function() {})(2)

The resulting exception.
1/1 test.js ... Exception in thread "main" java.lang.AssertionError: Only return value on stack allowed at return point - depth=2 stack = [object, object]
        at jdk.nashorn.internal.codegen.MethodEmitter._return(MethodEmitter.java:1311)
        at jdk.nashorn.internal.codegen.CodeGenerator.enter(CodeGenerator.java:1460)
        at jdk.nashorn.internal.ir.ReturnNode.accept(ReturnNode.java:104)
        at jdk.nashorn.internal.ir.FunctionNode.accept(FunctionNode.java:318)
        at jdk.nashorn.internal.ir.FunctionNode.accept(FunctionNode.java:314)
        at jdk.nashorn.internal.codegen.Compiler.compile(Compiler.java:366)
        at jdk.nashorn.internal.runtime.Context.compile(Context.java:829)
        at jdk.nashorn.internal.runtime.Context.compileScript(Context.java:805)
        at jdk.nashorn.internal.runtime.Context.evaluateSource(Context.java:764)
        at jdk.nashorn.internal.runtime.Context.load(Context.java:608)
        at jdk.nashorn.internal.objects.Global.load(Global.java:694)
        at jdk.nashorn.internal.scripts.Script$evals_wrap._L26$_L86(jar:file:/E:/ws/nodejar/target/node-0.1.jar!/com/oracle/node/evals_wrap.js:87)
        at jdk.nashorn.internal.scripts.Script$module._L1$_L377(module.js:442)
        at jdk.nashorn.internal.scripts.Script$module._L1$_L470(module.js:472)
        at jdk.nashorn.internal.scripts.Script$module._L1$_L351(module.js:361)
        at jdk.nashorn.internal.scripts.Script$module._L1$_L275(module.js:312)
        at jdk.nashorn.internal.scripts.Script$module._L1$_L495(module.js:497)
        at jdk.nashorn.internal.scripts.Script$process._L1$_L213$_L216(process.js:217)
        at jdk.nashorn.internal.javaadapters.com.oracle.node.eventloop.Callback.call(Unknown Source)
        at com.oracle.node.eventloop.EventLoop.processEvents(EventLoop.java:182)
        at com.oracle.node.eventloop.EventLoop.run(EventLoop.java:166)
        at com.oracle.node.Server.run(Server.java:99)
        at com.oracle.node.Launcher.main(Launcher.java:31)
2s FAILED