diff -r 03e7ec8180f0 -r 39db5a01cd53 hgext/rebase.py
--- a/hgext/rebase.py	Sat Jun 30 07:23:02 2018 +0530
+++ b/hgext/rebase.py	Sun Jul 01 21:40:55 2018 +0900
@@ -623,7 +623,7 @@
             newwd = self.originalwd
         if newwd not in [c.rev() for c in repo[None].parents()]:
             ui.note(_("update back to initial working directory parent\n"))
-            hg.updaterepo(repo, newwd, False)
+            hg.updaterepo(repo, newwd, overwrite=False)
 
         collapsedas = None
         if self.collapsef and not self.keepf: