# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@fb.com>
# Date 1412664307 25200
# Node ID e4eb4bfc3616386acc73eed3fb30975127294593
# Parent  20d998395ee7fe6912b7a3f25ed571d88ae768bb
rangeset: use `first` and `last` instead of direct indexing

This makes it compatible with all smarsets classes.

diff -r 20d998395ee7 -r e4eb4bfc3616 mercurial/revset.py
--- a/mercurial/revset.py	Mon Oct 06 23:37:39 2014 -0700
+++ b/mercurial/revset.py	Mon Oct 06 23:45:07 2014 -0700
@@ -271,7 +271,7 @@
 
     if not m or not n:
         return baseset()
-    m, n = m[0], n[-1]
+    m, n = m.first(), n.last()
 
     if m < n:
         r = spanset(repo, m, n + 1)