diff -r e07c5740eaaa -r b47fef6d2365 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Sun Jul 16 02:38:14 2017 +0200
+++ b/mercurial/localrepo.py	Sun Jul 16 02:20:06 2017 +0200
@@ -1099,6 +1099,7 @@
                 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
@@ -1255,6 +1256,7 @@
         # to stored data if transaction has no error.
         tr.addpostclose('refresh-filecachestats', self._refreshfilecachestats)
         self._transref = weakref.ref(tr)
+        scmutil.registersummarycallback(self, tr, desc)
         return tr
 
     def _journalfiles(self):