xwm: Remove child->parent pointer when parent destroys
@@ -313,6 +313,7 @@ static void xwayland_surface_destroy(
wl_list_for_each_safe(child, next, &xsurface->children, parent_link) {
wl_list_remove(&child->parent_link);
wl_list_init(&child->parent_link);
+ child->parent = NULL;
}
if (xsurface->surface_id) {
