FULL PRODUCT VERSION :
java version "1.8.0_11"
Java(TM) SE Runtime Environment (build 1.8.0_11-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.11-b03, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
Initially i added this here:
http://stackoverflow.com/questions/24784792/java8-javascript-nashorn-exception-no-current-global-instance-for-nashorn

I want to retrieve object generated in JS store them in Java and later call methods on them.
This worked with Java 7, now with Java 8 i get an exception:

    Exception in thread "main" java.lang.IllegalArgumentException: no current Global instance for nashorn
     at jdk.nashorn.api.scripting.NashornScriptEngine.invokeImpl(NashornScriptEngine.java:492)
at jdk.nashorn.api.scripting.NashornScriptEngine.invokeMethod(NashornScriptEngine.java:238)

I have modified the official example from here http://docs.oracle.com/javase/8/docs/technotes/guides/scripting/prog_guide/api.html a bit.

Now i created a minimal example to produce this exception.
It seems like, if a JS object is passed to Java via return value, it is different to the case JS calls a Java object's method and passes the object.

    public class InvokeScriptMethod {

static Object o1;

public static class Context {
public void add( Object o ){
InvokeScriptMethod.o1 = o;
     }
}
    
     public static void main(String[] args) throws Exception {
            ScriptEngineManager manager = new ScriptEngineManager();
            ScriptEngine engine = manager.getEngineByName("nashorn");

            engine.put("ctx", new Context());

            engine.eval("function bla(){\n"
             + "var obj = new Object();\n"
         + "obj.var1 = 3;\n"
         + "obj.hello = function(name) { print('Hello, ' + this.var1 + ' ' + name); this.var1++; };\n"
             + "ctx.add(obj);\n"
             + "return obj;\n"
             + "}");

            Invocable inv = (Invocable) engine;
        
            Object obj = inv.invokeFunction("bla");
        
            System.out.printf("retrieved as return value : %s %s\n", obj.getClass(), obj);
            System.out.printf("retrieved via call to java object: %s %s\n", o1.getClass(), o1);

            inv.invokeMethod(obj, "hello", "Script Method!");
            inv.invokeMethod(o1, "hello", "Script Method!"); // <-- exception
        }
    }

program output:

    retrieved as return value : class jdk.nashorn.api.scripting.ScriptObjectMirror [object Object]
    retrieved via call to java object: class jdk.nashorn.internal.scripts.JO jdk.nashorn.internal.scripts.JO@105fece7
    Hello, 3 Script Method!
    Exception in thread "main" java.lang.IllegalArgumentException: no current Global instance for nashorn

obj is a ScriptObjectMirror as it is expected, o1 is an internal object.
http://cr.openjdk.java.net/~sundar/8023631/webrev.00/src/jdk/nashorn/api/scripting/NashornScriptEngine.java.html line 481 shows how this exception is thrown.
So I think, there is something wrong by wrapping the "naked" JS object into a ScriptObjectMirror when passing as argument to Java.



REGRESSION. Last worked in version 7u10

ADDITIONAL REGRESSION INFORMATION:
java version "1.7.0_06"
Java(TM) SE Runtime Environment (build 1.7.0_06-b24)
Java HotSpot(TM) 64-Bit Server VM (build 23.2-b09, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run example code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
no exception
ACTUAL -
exception thrown

ERROR MESSAGES/STACK TRACES THAT OCCUR :
no current Global instance for nashorn

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
   public class InvokeScriptMethod {

static Object o1;

public static class Context {
public void add( Object o ){
InvokeScriptMethod.o1 = o;
     }
}
    
     public static void main(String[] args) throws Exception {
            ScriptEngineManager manager = new ScriptEngineManager();
            ScriptEngine engine = manager.getEngineByName("nashorn");

            engine.put("ctx", new Context());

            engine.eval("function bla(){\n"
             + "var obj = new Object();\n"
         + "obj.var1 = 3;\n"
         + "obj.hello = function(name) { print('Hello, ' + this.var1 + ' ' + name); this.var1++; };\n"
             + "ctx.add(obj);\n"
             + "return obj;\n"
             + "}");

            Invocable inv = (Invocable) engine;
        
            Object obj = inv.invokeFunction("bla");
        
            System.out.printf("retrieved as return value : %s %s\n", obj.getClass(), obj);
            System.out.printf("retrieved via call to java object: %s %s\n", o1.getClass(), o1);

            inv.invokeMethod(obj, "hello", "Script Method!");
            inv.invokeMethod(o1, "hello", "Script Method!"); // <-- exception
        }
    }

---------- END SOURCE ----------