JSC::JSObject* ClassObjectDelegate::construct(JSC::ExecState *exec, JSC::JSObject *callee,
                                              const JSC::ArgList &args)
{
    Q_ASSERT(callee->inherits(&QScriptObject::info));
    QScriptObject *obj = static_cast<QScriptObject*>(callee);
    QScriptObjectDelegate *delegate = obj->delegate();
    QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();

    QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);

    // =============================================================
    // Change #1 begins here. This line is commented out in 4.6.1 source code 
    // =============================================================
    JSC::ExecState *oldFrame = eng_p->currentFrame;
    // ============================================================= 
    // End change 1 
    // =============================================================

    eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);
    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);

    QScriptValue defaultObject = ctx->thisObject();
    QScriptValue result = qvariant_cast<QScriptValue>(scriptClass->extension(QScriptClass::Callable, qVariantFromValue(ctx)));

    // ============================================================= 
    // Begin change 2: pop context and restore the frame pointer. 
    // =============================================================
    eng_p->popContext();
    eng_p->currentFrame = oldFrame;
    // ============================================================= 
    // End change 2 
    // =============================================================

    if (!result.isObject())
        result = defaultObject;
    return JSC::asObject(eng_p->scriptValueToJSCValue(result));
}