FULL PRODUCT VERSION :
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows -7

A DESCRIPTION OF THE PROBLEM :
public static void main(String[] args) throws ScriptException {
ScriptEngine engine = new ScriptEngineManager().getEngineByName("js");
engine.eval("Object.prototype.merge = function(obj2){ return this; }");
engine.eval("function nothingTodo(k, v) {return v}");
engine.eval("JSON.parse('{\"name\" : \"jack\"}')");
                // ^^^^^^^^^^^^ THAT IS OK
engine.eval("JSON.parse('{\"name\" : \"jack\"}', nothingTodo)");
                // ^^^^^^^^^^^^ DEAD LOOP
}


Exception in thread "main" java.lang.StackOverflowError
at jdk.nashorn.internal.runtime.PropertyHashMap.find(PropertyHashMap.java:275)
at jdk.nashorn.internal.runtime.PropertyMap.findProperty(PropertyMap.java:552)
at jdk.nashorn.internal.runtime.ScriptObject.findProperty(ScriptObject.java:814)
at jdk.nashorn.internal.runtime.ScriptObject.findProperty(ScriptObject.java:823)
at jdk.nashorn.internal.runtime.ScriptObject.findProperty(ScriptObject.java:790)
at jdk.nashorn.internal.runtime.ScriptObject.get(ScriptObject.java:3000)
at jdk.nashorn.internal.runtime.ScriptObject.get(ScriptObject.java:3020)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:113)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)


REGRESSION. Last worked in version 8u45


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.StackOverflowError
at jdk.nashorn.internal.runtime.PropertyHashMap.find(PropertyHashMap.java:275)
at jdk.nashorn.internal.runtime.PropertyMap.findProperty(PropertyMap.java:552)
at jdk.nashorn.internal.runtime.ScriptObject.findProperty(ScriptObject.java:814)
at jdk.nashorn.internal.runtime.ScriptObject.findProperty(ScriptObject.java:823)
at jdk.nashorn.internal.runtime.ScriptObject.findProperty(ScriptObject.java:790)
at jdk.nashorn.internal.runtime.ScriptObject.get(ScriptObject.java:3000)
at jdk.nashorn.internal.runtime.ScriptObject.get(ScriptObject.java:3020)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:113)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)
at jdk.nashorn.internal.runtime.JSONFunctions.walk(JSONFunctions.java:120)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

public class Look {
public static void main(String[] args) throws ScriptException {
ScriptEngine engine = new ScriptEngineManager().getEngineByName("js");
engine.eval("Object.prototype.merge = function(obj2){ return this; }");
engine.eval("function nothingTodo(k, v) {return v}");
engine.eval("JSON.parse('{\"name\" : \"jack\"}')");
engine.eval("JSON.parse('{\"name\" : \"jack\"}', nothingTodo)");
}
}

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