diff -r 0f83dc22efbc -r 5ae124310ab0 mercurial/revlog.py
--- a/mercurial/revlog.py	Thu Feb 02 17:34:17 2023 +0100
+++ b/mercurial/revlog.py	Thu Feb 02 17:34:25 2023 +0100
@@ -1782,7 +1782,7 @@
         """tells whether rev is a snapshot"""
         if not self._sparserevlog:
             return self.deltaparent(rev) == nullrev
-        elif util.safehasattr(self.index, b'issnapshot'):
+        elif util.safehasattr(self.index, 'issnapshot'):
             # directly assign the method to cache the testing and access
             self.issnapshot = self.index.issnapshot
             return self.issnapshot(rev)