--- a/mercurial/dirstate.py	Wed Oct 16 10:14:26 2019 +0200
+++ b/mercurial/dirstate.py	Thu Oct 17 14:20:11 2019 +0200
@@ -27,7 +27,6 @@
     policy,
     pycompat,
     scmutil,
-    sparse,
     txnutil,
     util,
 )
@@ -1115,11 +1114,6 @@
         elif not match.always():
             # Matchers have yet to be implemented
             use_rust = False
-        # We don't yet have a mechanism for extensions
-        elif sparse.enabled:
-            use_rust = False
-        elif not getattr(self, "_fsmonitordisable", True):
-            use_rust = False
 
         if use_rust:
             (