--- a/mercurial/hgweb/webutil.py	Sun Aug 26 22:23:25 2018 +0900
+++ b/mercurial/hgweb/webutil.py	Sun Aug 26 22:18:09 2018 +0900
@@ -320,7 +320,8 @@
 
 def cleanpath(repo, path):
     path = path.lstrip('/')
-    return pathutil.canonpath(repo.root, '', path)
+    auditor = pathutil.pathauditor(repo.root, realfs=False)
+    return pathutil.canonpath(repo.root, '', path, auditor=auditor)
 
 def changectx(repo, req):
     changeid = "tip"