Tom Ellis <tom-lists-postgresql(dot)org(at)jaguarpaw(dot)co(dot)uk> writes:
> This small query seems to segfault Postgres. I've tried on the
> version of Postgres 11 that comes with Debian Stable and all versions
> on https://www.db-fiddle.com/ including 13 (Beta). DB Fiddle actually
> says "An unexpected error occurred." but I suspect that's the
> segfault.
Hm, looks like this has been wrong since we introduced LATERAL :-(.
I pushed a band-aid fix. Thanks for the report!
regards, tom lane