mercurial/statichttprepo.py

--- a/mercurial/statichttprepo.py	Mon May 03 12:29:30 2021 +0200
+++ b/mercurial/statichttprepo.py	Mon May 03 12:29:41 2021 +0200
@@ -177,6 +177,7 @@
         self.filtername = None
         self._extrafilterid = None
         self._wanted_sidedata = set()
+        self.features = set()
 
         try:
             requirements = set(self.vfs.read(b'requires').splitlines())