diff -r 77a9c7d8a7ba -r f0e07efc199f mercurial/localrepo.py
--- a/mercurial/localrepo.py	Wed Sep 25 01:16:47 2024 -0400
+++ b/mercurial/localrepo.py	Sun Sep 22 15:55:46 2024 +0200
@@ -77,6 +77,10 @@
     wireprototypes,
 )
 
+from .branching import (
+    rev_cache as rev_branch_cache,
+)
+
 from .interfaces import (
     repository,
     util as interfaceutil,
@@ -2281,7 +2285,8 @@
     @unfilteredmethod
     def revbranchcache(self):
         if not self._revbranchcache:
-            self._revbranchcache = branchmap.revbranchcache(self.unfiltered())
+            unfi = self.unfiltered()
+            self._revbranchcache = rev_branch_cache.revbranchcache(unfi)
         return self._revbranchcache
 
     def register_changeset(self, rev, changelogrevision):