diff -r b45c353ebbc7 -r 3c07e0b1f6c6 mercurial/commands.py
--- a/mercurial/commands.py	Thu Jun 14 23:22:51 2018 +0900
+++ b/mercurial/commands.py	Fri Jun 15 02:34:27 2018 +0530
@@ -2186,6 +2186,8 @@
     revs.extend(opts.get('rev'))
     # a dict of data to be stored in state file
     statedata = {}
+    # list of new nodes created by ongoing graft
+    statedata['newnodes'] = []
 
     if not opts.get('user') and opts.get('currentuser'):
         opts['user'] = ui.username()
@@ -2362,6 +2364,9 @@
             ui.warn(
                 _('note: graft of %d:%s created no changes to commit\n') %
                 (ctx.rev(), ctx))
+        # checking that newnodes exist because old state files won't have it
+        elif statedata.get('newnodes') is not None:
+            statedata['newnodes'].append(node)
 
     # remove state when we complete successfully
     if not opts.get('dry_run'):