--- a/hgext/fastannotate/error.py	Mon Sep 16 15:36:38 2024 +0200
+++ b/hgext/fastannotate/error.py	Mon Sep 16 15:36:44 2024 +0200
@@ -4,6 +4,7 @@
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
+from __future__ import annotations
 
 
 class CorruptedFileError(Exception):