PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> Steps to Reproduce:
> Enable allow_system_table_mods = true.
> Modify system tables (e.g., pg_database) to restrict visibility in a
> multi-tenant setup.
> Attempt to run pg_dump for backup purposes.
> pg_dump fails due to the recent security restriction.
Without any details about what you did to the system catalogs,
this complaint is quite un-actionable.
I will note that we do not consider random manual changes to
system catalogs to be a supported feature.
regards, tom lane