[Reg] JS getter that throws exception is not returned by QScriptValue::property()

QScriptEngine eng;
QScriptValue str = QScriptValue(&eng, "bar");

eng.evaluate("o = new Object; "
             "o.__defineGetter__('foo', function() { throw new Error('get foo') }); "
             "o.__defineSetter__('foo', function() { throw new Error('set foo') }); ");
QScriptValue object = eng.evaluate("o");
QScriptValue ret = object.property("foo");
qWarning() << ret.toString();