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-rw-r--r--generic/tclEnv.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/generic/tclEnv.c b/generic/tclEnv.c
index 2cb240d..66ddb57 100644
--- a/generic/tclEnv.c
+++ b/generic/tclEnv.c
@@ -551,7 +551,8 @@ TclGetEnv(
* array.
*
* Results:
- * Always returns NULL to indicate success.
+ * Returns NULL to indicate success, or an error-message if the array
+ * element being handled doesn't exist.
*
* Side effects:
* Environment variable changes get propagated. If the whole "env" array
@@ -609,8 +610,7 @@ EnvTraceProc(
const char *value = TclGetEnv(name2, &valueString);
if (value == NULL) {
- Tcl_UnsetVar2(interp, name1, name2, 0);
- return NULL;
+ return (char *) "no such variable";
}
Tcl_SetVar2(interp, name1, name2, value, 0);
Tcl_DStringFree(&valueString);