--- a/mercurial/dirstate.py	Wed Oct 20 18:25:49 2021 +0200
+++ b/mercurial/dirstate.py	Wed Oct 20 18:40:03 2021 +0200
@@ -300,6 +300,8 @@
                         return b''
                 return fallback(x)
 
+            return f
+
     @propertycache
     def _cwd(self):
         # internal config: ui.forcecwd