--- a/mercurial/bundle2.py	Tue Sep 19 22:23:41 2017 +0200
+++ b/mercurial/bundle2.py	Wed Sep 20 18:29:10 2017 +0200
@@ -1840,7 +1840,7 @@
 def handlephases(op, inpart):
     """apply phases from bundle part to repo"""
     headsbyphase = phases.binarydecode(inpart)
-    phases.updatephases(op.repo.unfiltered(), op.gettransaction(), headsbyphase)
+    phases.updatephases(op.repo.unfiltered(), op.gettransaction, headsbyphase)
     op.records.add('phase-heads', {})
 
 @parthandler('reply:pushkey', ('return', 'in-reply-to'))