@@ -, +, @@ 
 DeepCopyPointerClasses
---
 Xi/exevents.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/Xi/exevents.c	
+++ a/Xi/exevents.c	
@@ -619,8 +619,10 @@ DeepCopyPointerClasses(DeviceIntPtr from, DeviceIntPtr to)
             memcpy(to->button->xkb_acts, from->button->xkb_acts,
                    sizeof(XkbAction));
         }
-        else
+        else {
             free(to->button->xkb_acts);
+            to->button->xkb_acts = NULL;
+        }
 
         memcpy(to->button->labels, from->button->labels,
                from->button->numButtons * sizeof(Atom));
--