--- a/mercurial/repository.py	Tue Jul 02 12:55:51 2019 -0400
+++ b/mercurial/repository.py	Sat Jul 13 23:45:32 2019 -0400
@@ -1656,7 +1656,7 @@
                editor=False, extra=None):
         """Add a new revision to the repository."""
 
-    def commitctx(ctx, error=False):
+    def commitctx(ctx, error=False, origctx=None):
         """Commit a commitctx instance to the repository."""
 
     def destroying():