--- a/mercurial/repo.py	Sun Oct 01 19:26:33 2006 +0200
+++ b/mercurial/repo.py	Sun Oct 01 11:58:55 2006 -0700
@@ -9,6 +9,9 @@
 class RepoError(Exception):
     pass
 
+class LookupError(RepoError):
+    pass
+
 class repository(object):
     def capable(self, name):
         '''tell whether repo supports named capability.