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-rw-r--r--generic/tkUndo.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/generic/tkUndo.c b/generic/tkUndo.c
index 8371f04..1150cef 100644
--- a/generic/tkUndo.c
+++ b/generic/tkUndo.c
@@ -9,7 +9,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkUndo.c,v 1.15 2009/02/06 08:12:07 das Exp $
+ * RCS: @(#) $Id: tkUndo.c,v 1.16 2009/06/30 00:56:29 das Exp $
*/
#include "tkInt.h"
@@ -394,6 +394,7 @@ TkUndoSetDepth(
prevelem = elem;
elem = elem->next;
}
+ CLANG_ASSERT(prevelem);
prevelem->next = NULL;
while (elem != NULL) {
prevelem = elem;