--- a/hgext/absorb.py	Wed Mar 10 18:09:21 2021 +0100
+++ b/hgext/absorb.py	Wed Jan 13 16:14:58 2021 +0100
@@ -102,6 +102,9 @@
 class emptyfilecontext(object):
     """minimal filecontext representing an empty file"""
 
+    def __init__(self, repo):
+        self._repo = repo
+
     def data(self):
         return b''
 
@@ -212,7 +215,7 @@
         if path in pctx:
             fctxs.append(pctx[path])
         else:
-            fctxs.append(emptyfilecontext())
+            fctxs.append(emptyfilecontext(pctx.repo()))
 
     fctxs.reverse()
     # note: we rely on a property of hg: filerev is not reused for linear