From 7314a9019c96fc7717e676e17a25fdf4c7c12d22 Mon Sep 17 00:00:00 2001
From: smoogipooo <smoogipooo@gmail.com>
Date: Mon, 22 May 2017 16:39:30 +0900
Subject: [PATCH] Fix nullref.

---
 .../Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
index 07438d5f2c..d044ee8893 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
@@ -87,7 +87,7 @@ public HitObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap
 
         public override Pattern Generate()
         {
-            int lastColumn = PreviousPattern.HitObjects.First().Column;
+            int lastColumn = PreviousPattern.HitObjects.FirstOrDefault()?.Column ?? 0;
 
             if ((convertType & PatternType.Reverse) > 0 && PreviousPattern.HitObjects.Any())
             {