--- a/contrib/phabricator.py	Tue Jul 04 16:36:48 2017 -0700
+++ b/contrib/phabricator.py	Tue Jul 04 16:36:48 2017 -0700
@@ -271,6 +271,9 @@
     revs = list(revs) + opts.get('rev', [])
     revs = scmutil.revrange(repo, revs)
 
+    if not revs:
+        raise error.Abort(_('phabsend requires at least one changeset'))
+
     # Send patches one by one so we know their Differential Revision IDs and
     # can provide dependency relationship
     lastrevid = None