I checked out this thread before posting - Qt6 apps core dumped - but it mentioned rebuilding apps which doesn’t apply here.
qt6-tools for the Qt5/6 designer tools, along with
pyside6. While the Qt5 versions are all working, none of the Qt6 programs open, crashing with:
terminated by signal SIGSEGV (Address boundary error)
I just completed a full system update, so all of the Qt library versions should match. This is the first time I’ve tried using these tools, so I have no idea when this started. I did install
kvantum for theming, but nothing else out of the ordinary.