--- a/mercurial/match.py	Fri Jul 21 11:26:51 2017 -0500
+++ b/mercurial/match.py	Wed Jul 19 14:50:50 2017 -0700
@@ -363,6 +363,9 @@
     def prefix(self):
         return True
 
+    def visitdir(self, dir):
+        return False
+
     def __repr__(self):
         return '<nevermatcher>'