--- a/mercurial/verify.py	Wed Nov 21 00:53:45 2012 +0100
+++ b/mercurial/verify.py	Mon Oct 08 17:08:52 2012 +0200
@@ -25,6 +25,7 @@
     return f
 
 def _verify(repo):
+    repo = repo.unfiltered()
     mflinkrevs = {}
     filelinkrevs = {}
     filenodes = {}