diff -r 2c302c654451 -r a059b17352ef mercurial/changegroup.py
--- a/mercurial/changegroup.py	Wed Sep 14 17:12:39 2016 +0200
+++ b/mercurial/changegroup.py	Tue Sep 13 16:25:21 2016 -0700
@@ -332,7 +332,7 @@
                     for cset in xrange(clstart, clend):
                         mfnode = repo.changelog.read(
                             repo.changelog.node(cset))[0]
-                        mfest = repo.manifest.readdelta(mfnode)
+                        mfest = repo.manifestlog[mfnode].readdelta()
                         # store file nodes we must see
                         for f, n in mfest.iteritems():
                             needfiles.setdefault(f, set()).add(n)