From 4c43d846f2c414143a149509961de68b6e341371 Mon Sep 17 00:00:00 2001
From: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Date: Thu, 1 Oct 2015 14:12:43 +0200
Subject: [PATCH] Fix 500 error on compare page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
---
 app/helpers/diff_helper.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
index 9d718e13b85..b896fba3704 100644
--- a/app/helpers/diff_helper.rb
+++ b/app/helpers/diff_helper.rb
@@ -170,7 +170,7 @@ module DiffHelper
 
   def commit_for_diff(diff)
     if diff.deleted_file
-      @merge_request ? @merge_request.commits.last : @commit.parent_id
+      @merge_request ? @merge_request.commits.last : @commit.parents.first
     else
       @commit
     end