dnf system-upgrade reboot #failure from FC21->22

Feb 12 21:02:02 ms.meepzor.info dnf[360]: Complete!
Feb 12 21:02:02 ms.meepzor.info dnf[360]: error: unexpectedly disconnected from boot status daemon
Feb 12 21:02:02 ms.meepzor.info systemd[1]: plymouth-start.service: main process exited, code=dumped, status=6/ABRT
Feb 12 21:02:02 ms.meepzor.info systemd[1]: Unit plymouth-start.service entered failed state.
Feb 12 21:02:02 ms.meepzor.info systemd[1]: plymouth-start.service failed.
Feb 12 21:02:02 ms.meepzor.info python[360]: Upgrade complete! Cleaning up and rebooting...
Feb 12 21:02:02 ms.meepzor.info dnf[360]: Cleaning up downloaded data...
Feb 12 21:02:03 ms.meepzor.info systemd-coredump[989]: Process 186 (plymouthd) of user 0 dumped core.

                                                       Stack trace of thread 186:
                                                       #0  0x0000003d4b4348d7 raise (libc.so.6)
                                                       #1  0x0000003d4b43653a abort (libc.so.6)
                                                       #2  0x0000003d4b42d47d __assert_fail_base (libc.so.6)
                                                       #3  0x0000003d4b42d532 __assert_fail (libc.so.6)
                                                       #4  0x0000003d4c40ccc2 ply_boot_splash_hide_message (libply-splash-core.so.2)
                                                       #5  0x0000000000409864 on_hide_message (plymouthd)
                                                       #6  0x0000000000407102 ply_boot_connection_on_request (plymouthd)
                                                       #7  0x0000003d4bc06786 ply_event_loop_process_pending_events (libply.so.2)
                                                       #8  0x0000003d4bc06fc0 ply_event_loop_run (libply.so.2)
                                                       #9  0x0000000000404bfc main (plymouthd)
                                                       #10 0x0000003d4b41ffe0 __libc_start_main (libc.so.6)
                                                       #11 0x0000000000405a14 _start (plymouthd)
Feb 12 21:02:05 ms.meepzor.info kernel: Ebtables v2.0 unregistered
Feb 12 21:02:06 ms.meepzor.info systemd[1]: Shutting down.
Feb 12 21:02:06 ms.meepzor.info systemd-journal[283]: Journal stopped