pgsql-bugs@postgresql.org writes:
> [linux-xfs-host]$ pg_dump db -Fc -f dump
> Segmentation fault (core dumped)
Can you provide a stack trace from the core file? It would also be
useful to see the last few SQL commands issued by pg_dump --- easiest
way to do this is enable query logging via
export PGOPTIONS="-c log_statement=1"
before running pg_dump, and then look in the postmaster log.
regards, tom lane