diff -r fb6ca9801d04 -r 78ef83c9e9e1 mercurial/commands.py
--- a/mercurial/commands.py	Fri Mar 24 08:34:56 2006 +0100
+++ b/mercurial/commands.py	Fri Mar 24 08:51:08 2006 +0100
@@ -2015,6 +2015,9 @@
 
     other = hg.repository(ui, dest)
     o = repo.findoutgoing(other, force=opts['force'])
+    if not o:
+        ui.status(_("no changes found\n"))
+        return
     o = repo.changelog.nodesbetween(o)[0]
     if opts['newest_first']:
         o.reverse()