--- weston-1.9.0/src/input.c.orig	2015-09-15 02:23:28.000000000 +0800
+++ weston-1.9.0/src/input.c	2015-11-02 11:42:13.510964525 +0800
@@ -245,6 +245,9 @@
 	struct wl_list *resource_list;
 	wl_fixed_t sx, sy;
 
+	if (!touch->focus)
+		return;
+
 	weston_view_from_global_fixed(touch->focus, x, y, &sx, &sy);
 
 	resource_list = &touch->focus_resource_list;