diff --git a/mercurial/patch.py b/mercurial/patch.py
--- a/mercurial/patch.py
+++ b/mercurial/patch.py
@@ -2326,7 +2326,7 @@
         relfiltered = True
 
     if not changes:
-        changes = repo.status(ctx1, ctx2, match=match)
+        changes = ctx1.status(ctx2, match=match)
     modified, added, removed = changes[:3]
 
     if not modified and not added and not removed: