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-rw-r--r--generic/tclEnv.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/generic/tclEnv.c b/generic/tclEnv.c
index f601da5..49984c9 100644
--- a/generic/tclEnv.c
+++ b/generic/tclEnv.c
@@ -12,7 +12,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclEnv.c,v 1.5 1999/10/13 00:32:17 hobbs Exp $
+ * RCS: @(#) $Id: tclEnv.c,v 1.6 1999/10/29 03:04:00 hobbs Exp $
*/
#include "tclInt.h"
@@ -251,7 +251,7 @@ TclSetEnv(name, value)
* update the string in the cache.
*/
- if (environ[index] == p) {
+ if ((index != -1) && (environ[index] == p)) {
ReplaceString(oldValue, p);
}