Paul A Jungwirth <pj@illuminatedcomputing.com> writes:
> I don't know what pg_upgrade tries to support for moving from one beta
> release to another. Is this something we should try to fix?
It's water over the dam now, I think. If we had such a breakage
between officially-released versions, that would be bad enough to
justify jumping through hoops. But beta releases have always been
"use at your own risk".
regards, tom lane