diff -r d67732a4b58a -r 5aac1a1a5beb mercurial/bundle2.py
--- a/mercurial/bundle2.py	Thu Feb 11 20:36:46 2021 -0800
+++ b/mercurial/bundle2.py	Thu Dec 24 11:21:23 2020 -0500
@@ -1769,7 +1769,7 @@
     for node in outgoing.ancestorsof:
         # Don't compute missing, as this may slow down serving.
         fnode = cache.getfnode(node, computemissing=False)
-        if fnode is not None:
+        if fnode:
             chunks.extend([node, fnode])
 
     if chunks: