mercurial/repoview.py

--- a/mercurial/repoview.py	Wed Nov 29 23:22:51 2023 -0500
+++ b/mercurial/repoview.py	Tue Dec 05 14:50:05 2023 +0100
@@ -305,6 +305,10 @@
             raise error.FilteredIndexError(rev)
         return revs
 
+    def _head_node_ids(self):
+        # no Rust fast path implemented yet, so just loop in Python
+        return [self.node(r) for r in self.headrevs()]
+
     def headrevs(self, revs=None):
         if revs is None:
             try: