--- a/mercurial/obsolete.py	Mon Jul 08 16:02:54 2024 +0200
+++ b/mercurial/obsolete.py	Mon Jul 08 16:19:33 2024 +0200
@@ -799,7 +799,8 @@
                     if rev is not None and rev in revs:
                         pendingnodes.add(node)
         seenmarkers = set()
-        seennodes = set(pendingnodes)
+        seenmarkers = set()
+        seennodes = set()
         precursorsmarkers = self.predecessors
         succsmarkers = self.successors
         children = self.children