leafhopper: Assert("outerstartsel <= outerendsel"), File: "costsize.c"

Hi,
(Buildfarm machine owner in CC.)

This animal has been unstable for some time and this is likely just a
symptom masking a bigger issue, but leafhopper has reported an
intriguing failure yesterday on HEAD:
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=leafhopper&dt=2025-01-16%2007%3A41%3A03

The relevant part of the issue can be found with the two following
logs, in 027_stream_regress_primary.log:
2025-01-16 07:47:29.748 UTC [823960:16] pg_regress/type_sanity LOG:
statement: SELECT t1.oid, t1.typname, p1.oid, p1.proname FROM pg_type
AS t1, pg_proc AS p1 WHERE t1.typinput = p1.oid AND p1.provolatile NOT
IN ('i', 's');
[...]
TRAP: failed Assert("outerstartsel <= outerendsel"), File:
"costsize.c", Line: 3678, PID: 823960

I don't recall seeing something like that. Does that ring a bell for
anybody?

Thanks,
--
Michael