diff -r 19ac0d8ee9a2 -r fd1bb7c1be78 tests/test-log.t
--- a/tests/test-log.t	Tue Jul 23 14:18:56 2013 -0500
+++ b/tests/test-log.t	Tue Jul 23 17:28:12 2013 -0500
@@ -1223,6 +1223,9 @@
   $ hg log --template='{rev}:{node}\n' --hidden
   1:a765632148dc55d38c35c4f247c618701886cb2f
   0:9f758d63dcde62d547ebfb08e1e7ee96535f2b05
+  $ hg log -r a
+  abort: unknown revision 'a'!
+  [255]
 
 test that parent prevent a changeset to be hidden