diff -r 3e91d9978bec -r 711ba0f1057e mercurial/manifest.py
--- a/mercurial/manifest.py	Fri Jan 15 01:58:59 2021 +0100
+++ b/mercurial/manifest.py	Wed Jan 20 14:47:13 2021 +0100
@@ -1836,6 +1836,7 @@
         deltas,
         linkmapper,
         transaction,
+        alwayscache=False,
         addrevisioncb=None,
         duplicaterevisioncb=None,
     ):
@@ -1843,6 +1844,7 @@
             deltas,
             linkmapper,
             transaction,
+            alwayscache=alwayscache,
             addrevisioncb=addrevisioncb,
             duplicaterevisioncb=duplicaterevisioncb,
         )