Take session and set in a single request always errors

[jonathanKingston]

I'm not sure if it's something I broke however I don't think it is.

If I have:

let mut session: AppSession = cx.take_session().expect("Handle missing session here with redirection");
session.counter = session.counter + 1;
cx.set_session(session);

The session handling code won't set the session and returns an error, which seems like an bug. I think it's breaking the receiver but I haven't investigated enough.

[tomhoule]

Sounds like a bug, we should investigate indeed.