From f819ffce2bbb64e2fdba83d130042d084304625c Mon Sep 17 00:00:00 2001
From: MillhioreF <millhiore@ppy.sh>
Date: Thu, 10 Aug 2017 00:08:39 -0500
Subject: [PATCH] Make the legacy decoder more resilient against leading
 linebreaks

---
 osu.Game/Beatmaps/Formats/BeatmapDecoder.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/osu.Game/Beatmaps/Formats/BeatmapDecoder.cs b/osu.Game/Beatmaps/Formats/BeatmapDecoder.cs
index 1c3eadc91e..234d65eee4 100644
--- a/osu.Game/Beatmaps/Formats/BeatmapDecoder.cs
+++ b/osu.Game/Beatmaps/Formats/BeatmapDecoder.cs
@@ -19,7 +19,9 @@ namespace osu.Game.Beatmaps.Formats
 
         public static BeatmapDecoder GetDecoder(StreamReader stream)
         {
-            string line = stream.ReadLine()?.Trim();
+            string line;
+            do { line = stream.ReadLine()?.Trim(); }
+                while (line != null && line.Length == 0);
 
             if (line == null || !decoders.ContainsKey(line))
                 throw new IOException(@"Unknown file format");