--- a/mercurial/bundlerepo.py	Mon May 03 12:21:56 2021 +0200
+++ b/mercurial/bundlerepo.py	Mon May 03 12:22:06 2021 +0200
@@ -233,7 +233,7 @@
             opener,
             # XXX should use the unencoded path
             target=(revlog_constants.KIND_FILELOG, path),
-            indexfile=self.indexfile,
+            indexfile=self._revlog.indexfile,
             cgunpacker=cgunpacker,
             linkmapper=linkmapper,
         )