luis(dot)roberto(at)siscobra(dot)com(dot)br writes:
> I also managed to find a coredump from systemd, if you want,I can send a link... it's 290MB, though.
Not much use in that, nobody else could do anything without the
matching debug symbols either.
> I can see messages like this, using journalctl -xe:
> Stack trace of thread 548078:
> #0 0x0000000000665ee4 ExecSubPlan (/usr/pgsql-13/bin/postgres)
Hm ... suggestive, but not really enough to debug it.
Can you build a self-contained test case?
regards, tom lane