--- a/mercurial/copies.py Wed Oct 02 17:42:01 2019 -0400
+++ b/mercurial/copies.py Tue Oct 15 18:42:03 2019 +0200
@@ -204,7 +204,7 @@
if a.rev() in (node.nullrev, b.rev()):
return {}
- repo = a.repo()
+ repo = a.repo().unfiltered()
children = {}
revinfo = _revinfogetter(repo)