diff -r 70ebb4bd8083 -r 62c56c94c77e mercurial/localrepo.py
--- a/mercurial/localrepo.py	Fri Jul 13 14:38:49 2012 +0200
+++ b/mercurial/localrepo.py	Mon Jul 16 17:44:46 2012 +0200
@@ -131,7 +131,12 @@
         # Callback are in the form: func(repo, roots) --> processed root.
         # This list it to be filled by extension during repo setup
         self._phasedefaults = []
-
+        # hiddenrevs: revs that should be hidden by command and tools
+        #
+        # This set is carried on the repo to ease initialisation and lazy
+        # loading it'll probably move back to changelog for efficienty and
+        # consistency reason
+        self.hiddenrevs = set()
         try:
             self.ui.readconfig(self.join("hgrc"), self.root)
             extensions.loadall(self.ui)