CI 3 RC Session unset in associative array

As i have already mentioned i'm new to the codeigniter, thats why i was just trying to follow the documentation, i think i'm relying on it way to much, its not that much of correct or updated anyway. i will try to use more of my brain from now on.

farewell.

You reported a valid issue, only it was a documentation issue and not a bug in the code. Doesn't mean that you shouldn't read the docs or that they are not otherwise correct.