Index: Objects/dictobject.c
===================================================================
--- Objects/dictobject.c	(revision 85893)
+++ Objects/dictobject.c	(working copy)
@@ -1820,8 +1820,7 @@
             Py_INCREF(deflt);
             return deflt;
         }
-        PyErr_SetString(PyExc_KeyError,
-                        "pop(): dictionary is empty");
+        set_key_error(key);
         return NULL;
     }
     if (!PyUnicode_CheckExact(key) ||