From 747bfe58fecffc2346a22e8f13fc041dc492f38c Mon Sep 17 00:00:00 2001
From: Martijn Pieters <mjpieters@fb.com>
Date: Wed, 8 Jun 2016 16:18:43 +0100
Subject: [PATCH] graphmod: avoid sorting when already sorted

This is somewhat redundant now, but allows us to add a toposort that should not
be re-sorted either.
---
 mercurial/cmdutil.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
index 2dd005f97b..d874e1f0a3 100644
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -2147,7 +2147,8 @@ def getgraphlogrevs(repo, pats, opts):
     if opts.get('rev'):
         # User-specified revs might be unsorted, but don't sort before
         # _makelogrevset because it might depend on the order of revs
-        revs.sort(reverse=True)
+        if not revs.isdescending():
+            revs.sort(reverse=True)
     if expr:
         # Revset matchers often operate faster on revisions in changelog
         # order, because most filters deal with the changelog.