mercurial/commands.py

--- a/mercurial/commands.py	Mon Mar 23 17:07:25 2015 -0700
+++ b/mercurial/commands.py	Mon Mar 23 18:21:01 2015 -0700
@@ -5152,6 +5152,9 @@
 
     if revs:
         revs = [repo.lookup(r) for r in scmutil.revrange(repo, revs)]
+        if not revs:
+            raise util.Abort(_("specified revisions evaluate to an empty set"),
+                             hint=_("use different revision arguments"))
 
     repo._subtoppath = dest
     try: