--- a/mercurial/localrepo.py	Fri Mar 22 10:56:55 2013 -0700
+++ b/mercurial/localrepo.py	Mon Mar 25 12:12:41 2013 -0500
@@ -1407,9 +1407,8 @@
         # removed. We can either remove phasecache from the filecache,
         # causing it to reload next time it is accessed, or simply filter
         # the removed nodes now and write the updated cache.
-        if '_phasecache' in self._filecache:
-            self._phasecache.filterunknown(self)
-            self._phasecache.write()
+        self._phasecache.filterunknown(self)
+        self._phasecache.write()
 
         # update the 'served' branch cache to help read only server process
         # Thanks to branchcache collaboration this is done from the nearest