--- a/mercurial/localrepo.py	Sun Jan 14 14:39:17 2018 -0800
+++ b/mercurial/localrepo.py	Wed Jan 10 14:00:23 2018 -0800
@@ -1134,7 +1134,6 @@
                 raise error.ProgrammingError('transaction requires locking')
         tr = self.currenttransaction()
         if tr is not None:
-            scmutil.registersummarycallback(self, tr, desc)
             return tr.nest()
 
         # abort here if the journal already exists