--- a/mercurial/encoding.py	Sat Nov 16 15:43:21 2019 +0900
+++ b/mercurial/encoding.py	Sat Nov 16 15:10:41 2019 +0900
@@ -35,7 +35,7 @@
     for t in (Any, Callable, List, Text, Type, Union):
         assert t
 
-    _Tlocalstr = TypeVar('_Tlocalstr', bound=localstr)
+    _Tlocalstr = TypeVar('_Tlocalstr', bound='localstr')
 
 charencode = policy.importmod('charencode')