Make builtin_module_names a tuple instead of a list.

diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index d32562e53cc01ec77d967ca486fcb150d1a5ee95..568f45aed60cccece0f3b16e9a7b03f2a25970b1 100644 (file)
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -232,6 +232,11 @@ list_builtin_module_names()
                DECREF(list);
                list = NULL;
        }
+       if (list) {
+               object *v = listtuple(list);
+               DECREF(list);
+               list = v;
+       }
        return list;
 }