diff -r 5cc8deb96b48 -r e627cc25b6f3 mercurial/smartset.py
--- a/mercurial/smartset.py	Sun Jan 05 22:23:31 2025 -0500
+++ b/mercurial/smartset.py	Sun Jan 05 22:26:16 2025 -0500
@@ -544,8 +544,7 @@
         elif val2 is not None:
             # might have been equality and both are empty
             yield val2
-        for val in it:
-            yield val
+        yield from it
 
 
 class addset(abstractsmartset):