[REG 6.5 → 6.8] Issue with inline components and setData

The attached example triggers an assertion if a relative URL is used, or prints an error like

QQuickItem_QML_2(0x55dd81b01f40) ""
QQmlComponent: Component is not ready
QObject(0x0) "qrc:/test0:4 Type Info unavailable\nqrc:/test0:-1 No such file or directory\n"

if an absolute URL is used in the setData call in MySpecialItem::breakStuff.

With 6.5, this works.