--- a/mercurial/pathutil.py	Wed Nov 08 01:58:16 2023 +0100
+++ b/mercurial/pathutil.py	Wed Dec 20 12:51:20 2023 +0100
@@ -23,6 +23,14 @@
 rustdirs = policy.importrust('dirstate', 'Dirs')
 parsers = policy.importmod('parsers')
 
+# keeps pyflakes happy
+assert [
+    Any,
+    Callable,
+    Iterator,
+    Optional,
+]
+
 
 def _lowerclean(s):
     # type: (bytes) -> bytes