diff -r 519a02267f90 -r e35a83cedde1 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Mon Sep 12 03:06:29 2016 +0900
+++ b/mercurial/localrepo.py	Mon Sep 12 03:06:29 2016 +0900
@@ -1279,6 +1279,7 @@
         self.invalidate()
         self.invalidatedirstate()
 
+    @unfilteredmethod
     def _refreshfilecachestats(self, tr):
         """Reload stats of cached files so that they are flagged as valid"""
         for k, ce in self._filecache.items():