This makes little sense, the toolbar is not a sibling of the mainwindow.

If all menus should be children of the mainwindow, better fix this in xmlgui, no?

Why doesn't the code at kxmlguibuilder.cpp:162 do the job?

In R36:e932b113b2d9ee7b792c23057ea2e15f8ea4f9c5#1999163, @dfaure wrote:

This makes little sense, the toolbar is not a sibling of the mainwindow.

Good point, this is semantically wrong...

If all menus should be children of the mainwindow, better fix this in xmlgui, no?

Why doesn't the code at kxmlguibuilder.cpp:162 do the job?

That code doesn't work because the initial parent is nullptr and it never enters the while loop.

What about using <MainWindow> as parent/container of everything (menubar, toolbar and the stand-alone popup menu)?
It fixes the parenting, but it still prints the warning of D6016

I still think it makes more sense to fix kxmlguibuilder than to try and find an XML hack (which would then have to be applied to ALL applications? What's special about ark?)

All right, I'll try to fix it in kxmlgui then.