--- a/mercurial/obsolete.py	Tue Jun 11 18:47:50 2024 +0200
+++ b/mercurial/obsolete.py	Mon Jun 24 03:16:52 2024 +0200
@@ -799,8 +799,7 @@
                     if rev is not None and rev in revs:
                         pendingnodes.add(node)
         seenmarkers = set()
-        seenmarkers = set()
-        seennodes = set()
+        seennodes = set(pendingnodes)
         precursorsmarkers = self.predecessors
         succsmarkers = self.successors
         children = self.children