--- a/mercurial/upgrade.py	Sun Oct 06 16:39:13 2019 -0400
+++ b/mercurial/upgrade.py	Sun Oct 06 16:55:18 2019 -0400
@@ -10,6 +10,7 @@
 import stat
 
 from .i18n import _
+from .pycompat import getattr
 from . import (
     changelog,
     error,