BUG #6734: create table (like ...) fails if an index has a comment

The following bug has been logged on the website:

Bug reference: 6734
Logged by: Daniele Varrazzo
Email address: daniele(dot)varrazzo(at)gmail(dot)com
PostgreSQL version: 9.1.4
Operating system: Linux
Description:

Weird, isn't it? Test case below.

Dropping the comment, the create table command works as expected. The
command fails with an: "ERROR: relation "foo2_f1_idx" already exists".

begin;

CREATE TABLE foo
(
id serial primary key,
f1 integer NOT NULL
);

CREATE INDEX foo_idx1 ON foo (f1);

CREATE INDEX foo_idx2 ON foo (f1) WHERE id > 10;

COMMENT ON INDEX foo_idx2 IS 'whatever';

create table foo2 (like foo including all);

rollback;