session.present vs session == nil

[MahdiSahebZamani]

Hi.
While working with lua-resty-openidc, I encountered the "request to the redirect_uri path but there's no session state found" error. I added some logs to the source code and realized that the session.present in the line returns false. Then, I added the session variable in the logs and found that it is present.
How is it possible?
I tried to comment out that if block and after that it reached this line and then returned false.
The question is what is the difference between session.present and session == nil that is in this line?

Environment

• lua-resty-openidc version (e.g. 1.7.5)
• OpenID Connect provider (custom OP)

Expected behaviour

session.present returns true when session is not null.

Actual behaviour

session.present returns false even if session == nil was false above.

[lexiconzero]

You've probably done what I just spent 5 hours troubleshooting..

lua-resty-session needs to be fixed at version 3.10 or lower. Default pulling latest will now work and this error was exactly what I experienced.

[MahdiSahebZamani]

I think there is an inconsistency in the modules lua-resty-openidc and lua-resty-session because now I encountered a new error. That is in this line, I don't find any method with the name regenerate in lua-resty-session version 4-0-5.

[MahdiSahebZamani]

You've probably done what I just spent 5 hours troubleshooting..

lua-resty-session needs to be fixed at version 3.10 or lower. Default pulling latest will now work and this error was exactly what I experienced.

That's exactly why it can't find regenerate.
Thanks.