[REG 6.3.1->6.3.2] Windows: Bluetooth service discovery error "QMetaMethod::invoke: Unable to handle unregistered datatype 'std::shared_ptr<QWinRTBluetoothDeviceDiscoveryWorker>'"

This ecaxt same code in a simple main.cpp:

#include <QCoreApplication>

#include <QtBluetooth/QBluetoothServiceDiscoveryAgent>

#include <QtBluetooth/QBluetoothLocalDevice>

int main(int argc, char *argv[]) {

QCoreApplication app(argc, argv);

qDebug() << "QT runtime version: " << qVersion() << ", compile version: " << QT_VERSION_STR;

QBluetoothServiceDiscoveryAgent *discoveryAgent = new QBluetoothServiceDiscoveryAgent();

QObject::connect(discoveryAgent, &QBluetoothServiceDiscoveryAgent::serviceDiscovered, [](const QBluetoothServiceInfo& serviceInfo) { qInfo() << "Found service: " << serviceInfo.serviceName() << " " << serviceInfo.serviceUuid(); });

QObject::connect(discoveryAgent, &QBluetoothServiceDiscoveryAgent::errorOccurred, [](QBluetoothServiceDiscoveryAgent::Error error) { qWarning() << "Discovery agent error: " << error; });

QObject::connect(discoveryAgent, &QBluetoothServiceDiscoveryAgent::finished, []() { qWarning() << "Discovery agent finished"; });

qInfo() << "Starting bluetooth service discovery agent"; discoveryAgent->start(QBluetoothServiceDiscoveryAgent::FullDiscovery);

return app.exec();

}

Gives the following output when using Qt 6.3.1:

QT runtime version: 6.3.1 , compile version: 6.3.1
Starting bluetooth service discovery agent
Found service: "MAP MAS-iOS" "{00001132-0000-1000-8000-00805f9b34fb}"
Found service: "Wireless iAP v2" "{02030302-1d19-415f-86f2-22a2106a0a77}"
Found service: "Wireless iAP" "{00000000-deca-fade-deca-deafdecacafe}"
Found service: "Phonebook" "{0000112f-0000-1000-8000-00805f9b34fb}"
Found service: "Handsfree Gateway" "{0000111f-0000-1000-8000-00805f9b34fb}"
Discovery agent finished

But after switching to Qt 6.3.2 runtime, getting this output with errors:

QT runtime version: 6.3.2 , compile version: 6.3.1
Starting bluetooth service discovery agent
QMetaMethod::invoke: Unable to handle unregistered datatype 'std::shared_ptr<QWinRTBluetoothDeviceDiscoveryWorker>'
QMetaMethod::invoke: Unable to handle unregistered datatype 'std::shared_ptr<QWinRTBluetoothDeviceDiscoveryWorker>'
QMetaMethod::invoke: Unable to handle unregistered datatype 'std::shared_ptr<QWinRTBluetoothDeviceDiscoveryWorker>'

No devices are discovered and the "finished"-signal is not emitted.

Same output also when it is both compiled and run with 6.3.2:

QT runtime version: 6.3.2 , compile version: 6.3.2
Starting bluetooth service discovery agent
QMetaMethod::invoke: Unable to handle unregistered datatype 'std::shared_ptr<QWinRTBluetoothDeviceDiscoveryWorker>'
QMetaMethod::invoke: Unable to handle unregistered datatype 'std::shared_ptr<QWinRTBluetoothDeviceDiscoveryWorker>'
QMetaMethod::invoke: Unable to handle unregistered datatype 'std::shared_ptr<QWinRTBluetoothDeviceDiscoveryWorker>'

However, runtime 6.3.1 compiled with 6.3.2 does work as expected again:

QT runtime version: 6.3.1 , compile version: 6.3.2
Starting bluetooth service discovery agent
Found service: "MAP MAS-iOS" "{00001132-0000-1000-8000-00805f9b34fb}"
Found service: "Wireless iAP v2" "{02030302-1d19-415f-86f2-22a2106a0a77}"
Found service: "Wireless iAP" "{00000000-deca-fade-deca-deafdecacafe}"
Found service: "Phonebook" "{0000112f-0000-1000-8000-00805f9b34fb}"
Found service: "Handsfree Gateway" "{0000111f-0000-1000-8000-00805f9b34fb}"
Discovery agent finished

In conclusion, the Qt 6.3.2 runtime stops QBluetoothServiceDiscoveryAgent from working for me.