Warning: Cookie names cannot contain any of the following

SSO in from Joomla to moodle, there will be this two error messages when signing out from Moodle:

Warning: Cookie names cannot contain any of the following '=,; \t\r\n\013\014' in /..../public_html/courses/auth/joomdle/auth.php on line 4197

Warning: session_regenerate_id() [function.session-regenerate-id]: Cannot regenerate session id - headers already sent in /.../public_html/courses/lib/sessionlib.php on line 237

There is no error when login directly from moodle then logout.

Sorry, I Put this post in the wrong category.

I just commented out line 4197
setcookie($r, false, time() - 3600, '/');

The logout warning is gone.

Will this have any weird result in other parts of the system?

I never saw anyone reporting that problem, so I don't know where it is coming from.

Did you try enabling/disabling redirect-less logout to see if it works better?

You should not have similar problems anywhere else, as this code is only used on logout,.

Just a follow up on this Issue, if others is going to have the same problem.

I got the same error.
The configuration in Joomla of the internal IP-adress to Moodle was wrong.
When changing the Ip-address to the right one, the problem was solved.