I wrote:
> It appears that hyrax (CLOBBER_CACHE_ALWAYS) is not very happy
> with this:
> https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=hyrax&dt=2020-09-19%2021%3A27%3A23
I reproduced that and traced it to a missing RelationOpenSmgr call.
Fixed now.
regards, tom lane