diff -r fe34c75f62ab -r 6085b7f1536d mercurial/repair.py
--- a/mercurial/repair.py	Mon Apr 05 23:54:54 2021 -0400
+++ b/mercurial/repair.py	Tue Apr 06 10:38:03 2021 +0200
@@ -428,7 +428,7 @@
     if scmutil.istreemanifest(repo):
         # This logic is safe if treemanifest isn't enabled, but also
         # pointless, so we skip it if treemanifest isn't enabled.
-        for unencoded, encoded, size in repo.store.datafiles():
+        for t, unencoded, encoded, size in repo.store.datafiles():
             if unencoded.startswith(b'meta/') and unencoded.endswith(
                 b'00manifest.i'
             ):