--- a/mercurial/revlogutils/sidedata.py	Wed Sep 04 03:19:58 2019 +0200
+++ b/mercurial/revlogutils/sidedata.py	Wed Sep 04 03:20:55 2019 +0200
@@ -77,3 +77,9 @@
 def sidedatarawprocessor(rl, text):
     # side data modifies rawtext and prevent rawtext hash validation
     return False
+
+processors = (
+    sidedatareadprocessor,
+    sidedatawriteprocessor,
+    sidedatarawprocessor,
+)