--- a/mercurial/interfaces/repository.py	Tue Oct 22 23:36:48 2024 -0400
+++ b/mercurial/interfaces/repository.py	Wed Oct 23 15:13:40 2024 -0400
@@ -1658,6 +1658,7 @@
     tracked file path.
     """
 
+    @abc.abstractmethod
     def file(self, f):
         """Obtain a filelog for a tracked path.