diff -r 59e703aecaf6 -r 114992041625 mercurial/context.py
--- a/mercurial/context.py	Fri Oct 17 15:27:33 2014 -0700
+++ b/mercurial/context.py	Fri Oct 17 15:27:12 2014 -0700
@@ -414,11 +414,6 @@
                 return
             except KeyError:
                 pass
-
-            try:
-                self._node = repo.branchtip(changeid)
-                self._rev = repo.changelog.rev(self._node)
-                return
             except error.FilteredRepoLookupError:
                 raise
             except error.RepoLookupError: