Interface locks and doesn't show why when media library is corrupted
When the media library discovers that it is in a corrupted state, it will trigger a dialog and ask the user what to do.
With HEAD of the Qt interface, this dialog never appears, the interface logs that it doesn't know where to show it and will completely lock the main thread of VLC, so it must be killed to continue.
For the user, it is non-obvious what is happening.