diff -r 9d4ad05bc91c -r cfd30df0f8e4 mercurial/revlog.py
--- a/mercurial/revlog.py	Wed Sep 18 17:50:57 2024 -0400
+++ b/mercurial/revlog.py	Sat Aug 03 01:33:13 2024 -0400
@@ -1310,6 +1310,7 @@
     """
 
     _flagserrorclass = error.RevlogError
+    _inner: "_InnerRevlog"
 
     opener: vfsmod.vfs