diff -r 3c2419e07df5 -r 59e703aecaf6 mercurial/context.py
--- a/mercurial/context.py	Sun Dec 14 19:11:44 2014 -0800
+++ b/mercurial/context.py	Fri Oct 17 15:27:33 2014 -0700
@@ -415,10 +415,6 @@
             except KeyError:
                 pass
 
-            if changeid in repo._tagscache.tags:
-                self._node = repo._tagscache.tags[changeid]
-                self._rev = repo.changelog.rev(self._node)
-                return
             try:
                 self._node = repo.branchtip(changeid)
                 self._rev = repo.changelog.rev(self._node)