--- a/mercurial/revlogutils/rewrite.py	Wed Oct 25 02:13:18 2023 +0200
+++ b/mercurial/revlogutils/rewrite.py	Thu Oct 19 02:57:05 2023 +0200
@@ -109,7 +109,7 @@
                     b'revision having delta stored'
                 )
                 raise error.Abort(m)
-            rawtext = rl._chunk(rev)
+            rawtext = rl._inner._chunk(rev)
         else:
             rawtext = rl.rawdata(rev)