QJSEngine: No way to catch non-immediate exceptions

jsengine.evaluate("someUndefined()");

will throw an error and I can catch it in the return value of the engine. That works great.

However:

jsengine.evaulate("

someQObject.mySignal.connect(function() {

   someUndefined();

});

");

will fail completely silently with no way to catch the errors.

QtScriptEngine had signalHandlerException(const QScriptValue & exception)

but there's no equivalent making us regress when porting.

Can we add an equivalent signal to QJSEngine emitted from QV4::ExectutionEngine::catchException?