[mutter/wip/texture-purge-on-nvidia: 17/71] wayland: Clean up xwayland grabs even if surface is gone

[Ray Strode <halfline src gnome org>]

commit 2fb5b65e94c2f8748267a0a50fd8ee667cb467e1
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Fri Aug 3 10:50:32 2018 +0200

    wayland: Clean up xwayland grabs even if surface is gone
    
    If the surface is gone before `meta_xwayland_keyboard_grab_end()` is
    called, we would bail out early leaving an empty grab, which will cause
    a segfault as soon as a key is pressed later on.
    
    Make sure we clean up the keyboard grab even if the surface is gone.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/issues/255
    (cherry picked from commit 252dd524390dcdbdd89534c0014d22a796957f55)

 src/wayland/meta-xwayland-grab-keyboard.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/src/wayland/meta-xwayland-grab-keyboard.c b/src/wayland/meta-xwayland-grab-keyboard.c
index 42b194a77..db2d5f0bd 100644
--- a/src/wayland/meta-xwayland-grab-keyboard.c
+++ b/src/wayland/meta-xwayland-grab-keyboard.c
@@ -85,6 +85,13 @@ meta_xwayland_keyboard_grab_end (MetaXwaylandKeyboardActiveGrab *active_grab)
 {
   MetaWaylandSeat *seat = active_grab->seat;
 
+  if (seat->keyboard->grab->interface->key == meta_xwayland_keyboard_grab_key)
+    {
+      meta_wayland_keyboard_end_grab (active_grab->keyboard_grab.keyboard);
+      meta_wayland_keyboard_set_focus (active_grab->keyboard_grab.keyboard, NULL);
+      meta_display_sync_wayland_input_focus (meta_get_display ());
+    }
+
   if (!active_grab->surface)
     return;
 
@@ -104,13 +111,6 @@ meta_xwayland_keyboard_grab_end (MetaXwaylandKeyboardActiveGrab *active_grab)
       active_grab->window_associate_handler = 0;
     }
 
-  if (seat->keyboard->grab->interface->key == meta_xwayland_keyboard_grab_key)
-    {
-      meta_wayland_keyboard_end_grab (active_grab->keyboard_grab.keyboard);
-      meta_wayland_keyboard_set_focus (active_grab->keyboard_grab.keyboard, NULL);
-      meta_display_sync_wayland_input_focus (meta_get_display ());
-    }
-
   active_grab->surface = NULL;
 }