From 5c5fdd7d09e5473a987675963b90be7066a72247 Mon Sep 17 00:00:00 2001
From: dgp <dgp@users.sourceforge.net>
Date: Thu, 10 Jul 2014 15:45:32 +0000
Subject: [7368d225a6] Extend the auto-cleanup of zero ref count values passed
 in to the Tcl_*SetVar*() family of routines to cover the missing case where
 the flags value of TCL_APPEND_VALUE is passed in alone. *** POTENTIAL
 INCOMAPTIBILITY***

---
 generic/tclVar.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/generic/tclVar.c b/generic/tclVar.c
index 12d6911..fda5ff5 100644
--- a/generic/tclVar.c
+++ b/generic/tclVar.c
@@ -1916,6 +1916,9 @@ TclPtrSetVar(
 		    Tcl_IncrRefCount(oldValuePtr);	/* Since var is ref */
 		}
 		Tcl_AppendObjToObj(oldValuePtr, newValuePtr);
+		if (newValuePtr->refCount == 0) {
+		    Tcl_DecrRefCount(newValuePtr);
+		}
 	    }
 	}
     } else if (newValuePtr != oldValuePtr) {
-- 
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