Hi,
Tomas provided me with a machine where the problem was reproducible
(Thanks again!). I first started to make sure a54e1f158 is unrelated -
and indeed, the problem appears independently.
I've a few leads that I'm currently testing out. One observation I think
might be crucial is that the problem, in Tomas' testcase with just
VACUUM FULL of pg_class and INSERTs into another rel, appears to only
happen if autovacuum is enabled. The crashes are always immediately
after autovacuum did an analyze of the relation.
What I see on the apply side, I think, that invalidation records for
contents of pg_class and pg_class itself are intermixed.
I'll continue looking into this.
Greetings,
Andres Freund
