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-rw-r--r--generic/tclVar.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/generic/tclVar.c b/generic/tclVar.c
index b4fffb1..2e5f39d 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -15,7 +15,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclVar.c,v 1.132 2007/04/23 20:11:10 dgp Exp $
+ * RCS: @(#) $Id: tclVar.c,v 1.133 2007/05/02 00:31:22 msofer Exp $
*/
#include "tclInt.h"
@@ -1649,7 +1649,9 @@ TclPtrSetVar(
}
} else { /* append string */
/*
- * We append newValuePtr's bytes but don't change its ref count.
+ * We append newValuePtr's bytes but don't change its ref count if
+ * non-zero; if newValuePtr has a zero refCount and we are not
+ * using the obj, be sure to free it to avoid a leak.
*/
if (oldValuePtr == NULL) {
@@ -1663,6 +1665,9 @@ TclPtrSetVar(
Tcl_IncrRefCount(oldValuePtr); /* since var is ref */
}
Tcl_AppendObjToObj(oldValuePtr, newValuePtr);
+ if (newValuePtr->refCount == 0) {
+ Tcl_DecrRefCount(newValuePtr);
+ }
}
}
} else if (newValuePtr != oldValuePtr) {