--- a/mercurial/unionrepo.py Fri Jan 15 01:58:59 2021 +0100
+++ b/mercurial/unionrepo.py Wed Jan 20 14:47:13 2021 +0100
@@ -128,6 +128,7 @@
deltas,
linkmapper,
transaction,
+ alwayscache=False,
addrevisioncb=None,
duplicaterevisioncb=None,
maybemissingparents=False,