[arch-general] sddm crashing with plasma

Anyone else seeing this - started after systemd 226 update. It starts sometimes - most often crashes on warm reboot - cold reboot seems more likely to work. Feels like a threading bug (missing mutex somewhere, or a barrier or something). Symptom: Reboot - sddm won't start. Log: ddm-helper[4240]: segfault at 14 ip 000000000042965e sp 00007ffdec4eb3b0 error 4 in sddm-helper[400000+3a000] Rebooting cold - will usually get it running again with no errors.