From df9709eef5f83bb6070ddb864f042cf9daff7d96 Mon Sep 17 00:00:00 2001
From: "jan.nijtmans" <nijtmans@users.sourceforge.net>
Date: Wed, 20 Nov 2013 11:20:32 +0000
Subject: Bug Fix: EnvTraceProc() MUST always return NULL to indicate success.

---
 generic/tclEnv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/generic/tclEnv.c b/generic/tclEnv.c
index 6a21947..7c49d44 100644
--- a/generic/tclEnv.c
+++ b/generic/tclEnv.c
@@ -614,7 +614,7 @@ EnvTraceProc(
 	const char *value = TclGetEnv(name2, &valueString);
 
 	if (value == NULL) {
-	    return (char *) "no such variable";
+	    return NULL;
 	}
 	Tcl_SetVar2(interp, name1, name2, value, 0);
 	Tcl_DStringFree(&valueString);
-- 
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