A day before public release, testing the @fedora workstation 29 to 30 upgrade one last time. Checking no downgrades etc. All looks good and now just wait for it to finish.
Ouch... @fedora 30 VM, file sharing with password enabled under @gnome enabled. Try to access with @redhat RHEL 7 and nautilus explodes leaving you unable to get away from password overlay screen. #reboot from tty3. 馃檭