The following error message often occurs after libwayland disconnects from clients:

"libwayland: error marshalling arguments for leave (signature 3uo): null value passed for arg 1"

The first bad commit is:

commit 0d379744d34e616fea840272deda6b7027f79f55
Author: Giulio Camuffo <giuliocamuffo@gmail.com>
Date:   Fri Nov 15 22:06:15 2013 +0100

    compositor: set weston_surface:resource to NULL when destroyed
    
    with the previous patch the resource isn't used inside weston_surface_destroy()
    anymore (aside sending events unuseful for a closing client), so we can safely
    reset it.
    
    Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
    Reviewed-by: Bryce Harrington <b.harrington@samsung.com>