revoke select right on pg_proc

Hi, all

someone said, his project needs to revoke select right from pg_proc: REVOKE SELECT ON pg_catalog.pg_proc FROM PUBLIC;

Then pgAdmin can't list any table nodes and report a permission error.
Because pgTableFactory::CreateObjects references to pg_proc, but
can not access it.

This is a abnormal case or a bug?

-- 
Quan Zongliang <quanzongliang@gmail.com>