QtQuickView does not listen to Qt.quit() signal

If the QML loaded by QtQuickView for some reason wants to exit the application, via Qt.quit() as per normal, this does nothing, just the following warning:

Signal QQmlEngine::quit() emitted, but no receivers connected to handle it. 

Steps

1. Load one of the QtQuickView examples, e.g. qtquickview_java or _kotlin
2. Modify a QML button to call Qt.quit() on click
3. Click the button.