From 727a9bcd16f078b63fbb8a64477ad54dc0e09a9c Mon Sep 17 00:00:00 2001
From: Dirk Lemstra <dirk@git.imagemagick.org>
Date: Sat, 20 Jan 2018 10:08:44 +0100
Subject: [PATCH] Throw exception when the image does not contain a data chunk
 (#441).

---
 src/ImageSharp/Formats/Png/PngDecoderCore.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/ImageSharp/Formats/Png/PngDecoderCore.cs b/src/ImageSharp/Formats/Png/PngDecoderCore.cs
index 5cdf80289..41f303093 100644
--- a/src/ImageSharp/Formats/Png/PngDecoderCore.cs
+++ b/src/ImageSharp/Formats/Png/PngDecoderCore.cs
@@ -269,6 +269,11 @@ namespace SixLabors.ImageSharp.Formats.Png
                     }
                 }
 
+                if (image == null)
+                {
+                    throw new ImageFormatException("PNG Image does not contain a data chunk");
+                }
+
                 return image;
             }
             finally