Why wasn't this patch applied

--- a/gdb/python/py-framefilter.c
+++ b/gdb/python/py-framefilter.c
@@ -1506,7 +1506,10 @@ apply_frame_filter (struct frame_info *f
 	 initialization error.  This return code will trigger a
 	 default backtrace.  */

- gdbpy_print_stack ();
+      if (gdb_python_module != NULL)
+        gdbpy_print_stack ();
+      else
+	PyErr_Clear ();
       do_cleanups (cleanups);
       return PY_BT_NO_FILTERS;
     }



This patch fixes this error message problem printed when a backtrace takes place: 
Python Exception <type 'exceptions.ImportError'> No module named gdb.frames: 

I found it here: http://www.sourceware.org/ml/gdb-patches/2013-11/msg00881.html

It was made available about half a year ago but still hasn't been applied. Is there a reason it hasn't been applied yet? I have tried it myself and it does work.