diff -urp insight-6.8-1/gdb/gdbtk/generic/gdbtk.c insight-6.8-1.new/gdb/gdbtk/generic/gdbtk.c
--- insight-6.8-1/gdb/gdbtk/generic/gdbtk.c	2013-01-18 12:25:26.000000000 +0000
+++ insight-6.8-1.new/gdb/gdbtk/generic/gdbtk.c	2013-01-18 12:25:52.000000000 +0000
@@ -493,17 +493,17 @@ gdbtk_init (void)
   make_final_cleanup (gdbtk_cleanup, NULL);
 
   if (Tcl_Init (gdbtk_interp) != TCL_OK)
-    error ("Tcl_Init failed: %s", gdbtk_interp->result);
+    error ("Tcl_Init failed: %s", Tcl_GetStringResult (gdbtk_interp));
 
   /* Initialize the Paths variable.  */
   if (ide_initialize_paths (gdbtk_interp, "") != TCL_OK)
-    error ("ide_initialize_paths failed: %s", gdbtk_interp->result);
+    error ("ide_initialize_paths failed: %s", Tcl_GetStringResult (gdbtk_interp));
 
   if (Tk_Init (gdbtk_interp) != TCL_OK)
-    error ("Tk_Init failed: %s", gdbtk_interp->result);
+    error ("Tk_Init failed: %s", Tcl_GetStringResult (gdbtk_interp));
 
   if (Tktable_Init (gdbtk_interp) != TCL_OK)
-    error ("Tktable_Init failed: %s", gdbtk_interp->result);
+    error ("Tktable_Init failed: %s", Tcl_GetStringResult (gdbtk_interp));
 
   Tcl_StaticPackage (gdbtk_interp, "Tktable", Tktable_Init,
 		     (Tcl_PackageInitProc *) NULL);
@@ -559,7 +559,7 @@ gdbtk_init (void)
 
   if (Gdbtk_Init (gdbtk_interp) != TCL_OK)
     {
-      error ("Gdbtk_Init failed: %s", gdbtk_interp->result);
+      error ("Gdbtk_Init failed: %s", Tcl_GetStringResult (gdbtk_interp));
     }
 
   Tcl_StaticPackage (gdbtk_interp, "Insight", Gdbtk_Init, NULL);
@@ -739,7 +739,7 @@ tk_command (char *cmd, int from_tty)
 
   retval = Tcl_Eval (gdbtk_interp, cmd);
 
-  result = xstrdup (gdbtk_interp->result);
+  result = xstrdup (Tcl_GetStringResult (gdbtk_interp));
 
   old_chain = make_cleanup (free, result);
 
diff -urp insight-6.8-1/gdb/gdbtk/generic/gdbtk-hooks.c insight-6.8-1.new/gdb/gdbtk/generic/gdbtk-hooks.c
--- insight-6.8-1/gdb/gdbtk/generic/gdbtk-hooks.c	2013-01-18 12:25:26.000000000 +0000
+++ insight-6.8-1.new/gdb/gdbtk/generic/gdbtk-hooks.c	2013-01-18 12:25:52.000000000 +0000
@@ -255,13 +255,16 @@ gdbtk_read (struct ui_file *stream, char
 	  actual_len = 0;
 	}
       else
-        actual_len = strlen (gdbtk_interp->result);
-
-      /* Truncate the string if it is too big for the caller's buffer.  */
-      if (actual_len >= sizeof_buf)
-	actual_len = sizeof_buf - 1;
+        {
+	  const char *tclResult = Tcl_GetStringResult (gdbtk_interp);
+	  actual_len = strlen (tclResult);
+
+	  /* Truncate the string if it is too big for the caller's buffer.  */
+	  if (actual_len >= sizeof_buf)
+	    actual_len = sizeof_buf - 1;
       
-      memcpy (buf, gdbtk_interp->result, actual_len);
+	  memcpy (buf, tclResult, actual_len);
+	}
       buf[actual_len] = '\0';
       return actual_len;
     }
@@ -506,11 +509,11 @@ gdbtk_readline (char *prompt)
 
   if (result == TCL_OK)
     {
-      return (xstrdup (gdbtk_interp->result));
+      return (xstrdup (Tcl_GetStringResult (gdbtk_interp)));
     }
   else
     {
-      gdbtk_fputs (gdbtk_interp->result, gdb_stdout);
+      gdbtk_fputs (Tcl_GetStringResult (gdbtk_interp), gdb_stdout);
       gdbtk_fputs ("\n", gdb_stdout);
       return (NULL);
     }
@@ -634,7 +637,7 @@ gdbtk_load_hash (const char *section, un
     report_error ();
   free(buf);
 
-  return atoi (gdbtk_interp->result);
+  return atoi (Tcl_GetStringResult (gdbtk_interp));
 }
 
 
@@ -687,7 +690,7 @@ gdbtk_query (const char *query, va_list
   gdbtk_two_elem_cmd ("gdbtk_tcl_query", buf);
   free(buf);
 
-  val = atol (gdbtk_interp->result);
+  val = atol (Tcl_GetStringResult (gdbtk_interp));
   return val;
 }
 
diff -urp insight-6.8-1/gdb/gdbtk/plugins/rhabout/rhabout.c insight-6.8-1.new/gdb/gdbtk/plugins/rhabout/rhabout.c
--- insight-6.8-1/gdb/gdbtk/plugins/rhabout/rhabout.c	2004-12-08 20:21:08.000000000 +0000
+++ insight-6.8-1.new/gdb/gdbtk/plugins/rhabout/rhabout.c	2013-01-18 12:31:57.000000000 +0000
@@ -22,7 +22,7 @@ extra_text (ClientData clientData,
                 Tcl_Interp *interp,
                 int objc, Tcl_Obj *CONST objv[])
 {
-  interp->result = "\nThis is a sample plug-in\n";
+  Tcl_SetResult (interp, "\nThis is a sample plug-in\n", TCL_STATIC);
   return TCL_OK;
 }