mercurial/commands.py

--- a/mercurial/commands.py	Wed Mar 07 19:57:50 2018 -0800
+++ b/mercurial/commands.py	Mon Mar 05 00:18:07 2018 -0500
@@ -2306,7 +2306,7 @@
             finally:
                 repo.ui.setconfig('ui', 'forcemerge', '', 'graft')
             # report any conflicts
-            if stats and stats[3] > 0:
+            if stats[3] > 0:
                 # write out state for --continue
                 nodelines = [repo[rev].hex() + "\n" for rev in revs[pos:]]
                 repo.vfs.write('graftstate', ''.join(nodelines))