master.mint27

rel_upgrade_root: Import syslog (#1099)

on_removals_finished logs with syslog.syslog() when update-grub fails,
but the module never imports syslog. If update-grub is missing or
raises, the handler itself fails with NameError, so Gtk.main_quit() and
sys.exit(0) are not reached and the upgrade process never exits.