Description:
------------
Using up to date version from RedHat 8.0, 4.2.2

Calling the function below will stuff up saving of _ALL_ session data:


Reproduce code:
---------------
function import_session_variables ($prefix)
{
    global $_SESSION;
    $tab = $_SESSION;

    reset($tab);
    while (!is_null($key = key($tab) ) ) {
        $var = $prefix.$key;
        global $$var;
        $$var = $_SESSION[$key];
        next($tab);
    }
    // if you uncomment the next line sessions will save
    // hence i have a work around
    // it'd be nice to have it fixed properly though
    // reset($tab);
}

Expected result:
----------------
import all the session variable
AND the session should still save correctly

Actual result:
--------------
imports all the session variables
BUT sessions ARE NOT saved