QmlCompiler generates check for undefined where it should check for null

// expression for objectName at line 12, column 5
QVariant r2_1;
QString r2_2;
// generate_LoadQmlContextPropertyLookup
{
QObject * retrieved;
while (!aotContext->loadScopeObjectPropertyLookup(0, &retrieved)) {
aotContext->setInstructionPointer(2);
aotContext->initLoadScopeObjectPropertyLookup(0, []() { static const auto t = QMetaType::fromName("ObjectWithMethod*"); return t; }());
if (aotContext->engine->hasError())
    return QString();
}
r2_1 = QVariant::fromValue(retrieved);
}
// generate_GetLookup
if (!r2_1.isValid()) {
    aotContext->setInstructionPointer(4);
    aotContext->engine->throwError(QJSValue::TypeError, QLatin1String("Cannot read property 'objectName' of undefined"));
    return QString();
}
while (!aotContext->getObjectLookup(1, *static_cast<QObject *const *>(r2_1.constData()), &r2_2)) {
aotContext->setInstructionPointer(4);
aotContext->initGetObjectLookup(1, *static_cast<QObject *const *>(r2_1.constData()), QMetaType::fromType<QString>());
if (aotContext->engine->hasError())
    return QString();
}
// generate_Ret
return r2_2;