From d8f01a421223dcf58b22e4cffef613818efde1fa Mon Sep 17 00:00:00 2001
From: dgp <dgp@users.sourceforge.net>
Date: Thu, 24 Mar 2016 12:59:06 +0000
Subject: [PATCH 0238/1800] stay out of internals when nice interfaces are
 available.

---
 generic/tclTest.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/generic/tclTest.c b/generic/tclTest.c
index 7c30d36e7..5bfa8f7ca 100644
--- a/generic/tclTest.c
+++ b/generic/tclTest.c
@@ -7012,17 +7012,11 @@ TestconcatobjCmd(
 
     list1Ptr = Tcl_NewStringObj("foo bar sum", -1);
     Tcl_ListObjLength(NULL, list1Ptr, &len);
-    if (list1Ptr->bytes != NULL) {
-	ckfree(list1Ptr->bytes);
-	list1Ptr->bytes = NULL;
-    }
+    Tcl_InvalidateStringrep(list1Ptr);
 
     list2Ptr = Tcl_NewStringObj("eeny meeny", -1);
     Tcl_ListObjLength(NULL, list2Ptr, &len);
-    if (list2Ptr->bytes != NULL) {
-	ckfree(list2Ptr->bytes);
-	list2Ptr->bytes = NULL;
-    }
+    Tcl_InvalidateStringrep(list2Ptr);
 
     /*
      * Verify that concat'ing a list obj with one or more empty strings does
-- 
2.19.1