--- a/mercurial/match.py	Fri Jul 14 10:48:08 2017 -0700
+++ b/mercurial/match.py	Fri Jul 14 10:57:36 2017 -0700
@@ -305,7 +305,7 @@
         This function's behavior is undefined if it has returned False for
         one of the dir's parent directories.
         '''
-        return False
+        return True
 
     def always(self):
         '''Matcher will match everything and .files() will be empty --