Fix bug #16819 with dereferencing invalid face pointer.

 src/xdisp.c (init_iterator): Don't dereference a bogus face
 pointer.

2 files changed, 6 insertions, 1 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index c127e793668..b46650a76db 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2014-02-20  Eli Zaretskii  <eliz@gnu.org>
+
+        * xdisp.c (init_iterator): Don't dereference a bogus face
+        pointer.  (Bug#16819)
+
 2014-02-20  Glenn Morris  <rgm@gnu.org>
 
         * data.c (Fdefalias): Doc fix.
diff --git a/src/xdisp.c b/src/xdisp.c
index b9908c6c9c6..6d5b9d18260 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -2928,7 +2928,7 @@ init_iterator (struct it *it, struct window *w,
       /* If we have a boxed mode line, make the first character appear
          with a left box line.  */
       face = FACE_FROM_ID (it->f, remapped_base_face_id);
-      if (face->box != FACE_NO_BOX)
+      if (face && face->box != FACE_NO_BOX)
         it->start_of_box_run_p = true;
     }