# HG changeset patch
# User Mads Kiilerich <madski@unity3d.com>
# Date 1365684262 -7200
# Node ID ef7068173a22ba660af2d124a59316002509d95a
# Parent  012780620d4f4c8d02c1a17c1826095c5e98b10a
tag: clarify cryptic error message when tagging null revision

diff -r 012780620d4f -r ef7068173a22 mercurial/commands.py
--- a/mercurial/commands.py	Fri Apr 12 16:55:34 2013 -0400
+++ b/mercurial/commands.py	Thu Apr 11 14:44:22 2013 +0200
@@ -5601,7 +5601,7 @@
         # don't allow tagging the null rev
         if (not opts.get('remove') and
             scmutil.revsingle(repo, rev_).rev() == nullrev):
-            raise util.Abort(_("null revision specified"))
+            raise util.Abort(_("cannot tag null revision"))
 
         repo.tag(names, r, message, opts.get('local'), opts.get('user'), date)
     finally:
diff -r 012780620d4f -r ef7068173a22 tests/test-tag.t
--- a/tests/test-tag.t	Fri Apr 12 16:55:34 2013 -0400
+++ b/tests/test-tag.t	Thu Apr 11 14:44:22 2013 +0200
@@ -264,11 +264,11 @@
 
   $ hg init empty
   $ hg tag -R empty nullrev
-  abort: null revision specified
+  abort: cannot tag null revision
   [255]
 
   $ hg tag -R empty -r 00000000000 -f nulltag
-  abort: null revision specified
+  abort: cannot tag null revision
   [255]
 
   $ cd ..