QObject::connect warns, but also fails to connect to lambdas with Qt::UniqueConnection

Behavior breakage detected porting from Qt 6.2.3 to Qt 6.5.1:

QObject::connect(myObject, &Object::mySignal, context, [](){}, Qt::UniqueConnection);

Prior to Qt 6.5, the final parameter would be ignored / the connection would be established, but since the lambda is always unique I suppose the last argument made no sense.

From 6.5, a useful warning is printed!

WARNING: QObject::connect(<sender>, <receiver>): unique connections require a pointer to member function of a QObject subclass

But the connection is no longer established, which breaks behavior.