QScriptEngine in Qt 4.6.0

QScriptEngine used for scripting applications.
To be exact - going to the dll and connects to the Win32 application.
When upgrading to version Qt4.6 problem:
- When you call QScriptEngine get this error:

Code:

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QScriptEngine: Must construct a Q (Core) Application before a QScriptEngine

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'll Show how to solve this problem??

P.S
Found diff

Code:

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-    JSC::initializeThreading(); // ### hmmm
+    if (!QCoreApplication::instance()) {
+        qFatal("QScriptEngine: Must construct a Q(Core)Application before a QScriptEngine");
+        return;
+    }
+    JSC::initializeThreading();

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and BUG
http://bugreports.qt.nokia.com/browse/QTBUG-4713
I will be glad of any assistance in solving the problem