Hi,

in the function matcheditToken there is a call to a function only available if you use memcached. The line in question is $mckey = memsess_key( session_id() );

the memsess_key function is registered in the function "SetupSession" (also in user.php). This function is only included if $wgSessionsInMemcached is true tough (as it should).

to solve the problem the function matcheditToken has to be altered.

search for the line:

if ( $val != $sessionToken ) {

and change this to:

if ( $val != $sessionToken and $wgSessionsInMemcached ) {

This change will avoid the error "call to undefined function memsess_key" when the session is lost.

Best regards, Peter.