Inconsistencies with create role

Hello,

When doing:

SELECT * FROM pg_user;

foo=# select * from pg_user;
usename | usesysid | usecreatedb | usesuper | usecatupd | passwd |
valuntil | useconfig
---------+----------+-------------+----------+-----------+----------+----------+-----------
jd | 10 | t | t | t | ******** |
|
(1 row)

Then:

foo=# create role foo with createdb;
CREATE ROLE
foo=# create user foo;
ERROR: role "foo" already exists
ERROR: role "foo" already exists
foo=# select * from pg_user;
usename | usesysid | usecreatedb | usesuper | usecatupd | passwd |
valuntil | useconfig
---------+----------+-------------+----------+-----------+----------+----------+-----------
jd | 10 | t | t | t | ******** |
|
(1 row)

I understand what is happening, but perhaps the error should be:

A role "foo" already exists which can not be the same as a username?

Or something like that...

Sincerely,

Joshua D. Drake

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