--- a/mercurial/localrepo.py	Sun Dec 16 20:33:00 2012 +0200
+++ b/mercurial/localrepo.py	Thu Jan 10 23:57:03 2013 +0200
@@ -1033,9 +1033,7 @@
 
         def unlock():
             self.dirstate.write()
-            ce = self._filecache.get('dirstate')
-            if ce:
-                ce.refresh()
+            self._filecache['dirstate'].refresh()
 
         l = self._lock(self.join("wlock"), wait, unlock,
                        self.invalidatedirstate, _('working directory of %s') %