diff -r a04b2c010d03 -r eb5048f8c533 mercurial/revlog.py
--- a/mercurial/revlog.py	Fri Sep 06 23:50:32 2019 +0200
+++ b/mercurial/revlog.py	Sat Sep 07 00:11:58 2019 +0200
@@ -1663,7 +1663,7 @@
             validatehash = self._processflagsraw(rawtext, flags)
             text = rawtext
         else:
-            r = self._processflagsread(rawtext, flags)
+            r = flagutil.processflagsread(self, rawtext, flags)
             text, validatehash, sidedata = r
         if validatehash:
             self.checkhash(text, node, rev=rev)