--- a/mercurial/posix.py	Fri May 05 06:08:36 2023 -0600
+++ b/mercurial/posix.py	Sat Aug 10 14:18:44 2024 -0400
@@ -213,7 +213,7 @@
 def copymode(
     src: bytes,
     dst: bytes,
-    mode: Optional[bytes] = None,
+    mode: Optional[int] = None,
     enforcewritable: bool = False,
 ) -> None:
     """Copy the file mode from the file at path src to dst.