On Sat, 27 Sept 2025 at 21:03, PG Bug reporting form
<noreply(at)postgresql(dot)org> wrote:
> psql -h localhost -p $PG19_PORT -c "select 1;" testdb
>
> causes the backend to seg fault using psql from both 66cdef4425f3 and 18.0.
I think it's more likely you need to do "make clean" before building.
David