diff -r b482d80e041b -r 3e102a8dd52c mercurial/commands.py
--- a/mercurial/commands.py	Thu Jun 22 10:15:15 2017 -0700
+++ b/mercurial/commands.py	Fri Jun 16 16:56:16 2017 -0700
@@ -5218,7 +5218,7 @@
             else:
                 txnname = 'unbundle\n%s' % util.hidepassword(url)
                 with repo.transaction(txnname) as tr:
-                    modheads = gen.apply(repo, tr, 'unbundle', url)
+                    modheads, addednodes = gen.apply(repo, tr, 'unbundle', url)
 
     return postincoming(ui, repo, modheads, opts.get(r'update'), None, None)