--- a/mercurial/localrepo.py	Sat Dec 29 23:09:07 2018 -0800
+++ b/mercurial/localrepo.py	Sat Dec 29 23:40:18 2018 -0800
@@ -1259,7 +1259,6 @@
 
     def setnarrowpats(self, newincludes, newexcludes):
         narrowspec.save(self, newincludes, newexcludes)
-        narrowspec.copytoworkingcopy(self)
         self.invalidate(clearfilecache=True)
 
     def __getitem__(self, changeid):