--- a/mercurial/manifest.py	Sun Oct 06 16:39:13 2019 -0400
+++ b/mercurial/manifest.py	Sun Oct 06 16:55:18 2019 -0400
@@ -19,6 +19,7 @@
     nullid,
     nullrev,
 )
+from .pycompat import getattr
 from . import (
     error,
     mdiff,