diff -r 7a8ea1397816 -r d718eddf01d9 mercurial/bundlerepo.py
--- a/mercurial/bundlerepo.py	Thu Dec 08 15:33:19 2022 +0100
+++ b/mercurial/bundlerepo.py	Thu Aug 31 23:56:15 2023 +0200
@@ -245,7 +245,7 @@
 class bundlephasecache(phases.phasecache):
     def __init__(self, *args, **kwargs):
         super(bundlephasecache, self).__init__(*args, **kwargs)
-        if util.safehasattr(self, 'opener'):
+        if hasattr(self, 'opener'):
             self.opener = vfsmod.readonlyvfs(self.opener)
 
     def write(self):