From 60cde0c0481de639b319cf86a5ce358aa13d92f7 Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Sun, 3 Oct 2021 19:16:53 +0200
Subject: [PATCH] Fix index out of bound issue in OptimizeHuffmanForRle

---
 src/ImageSharp/Formats/WebP/Lossless/HuffmanUtils.cs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/ImageSharp/Formats/WebP/Lossless/HuffmanUtils.cs b/src/ImageSharp/Formats/WebP/Lossless/HuffmanUtils.cs
index 2d94c92807..2964c3b7c0 100644
--- a/src/ImageSharp/Formats/WebP/Lossless/HuffmanUtils.cs
+++ b/src/ImageSharp/Formats/WebP/Lossless/HuffmanUtils.cs
@@ -93,8 +93,7 @@ namespace SixLabors.ImageSharp.Formats.Webp.Lossless
             uint sum = 0;
             for (int i = 0; i < length + 1; ++i)
             {
-                bool valuesShouldBeCollapsedToStrideAverage = ValuesShouldBeCollapsedToStrideAverage((int)counts[i], (int)limit);
-                if (i == length || goodForRle[i] || (i != 0 && goodForRle[i - 1]) || !valuesShouldBeCollapsedToStrideAverage)
+                if (i == length || goodForRle[i] || (i != 0 && goodForRle[i - 1]) || !ValuesShouldBeCollapsedToStrideAverage((int)counts[i], (int)limit))
                 {
                     if (stride >= 4 || (stride >= 3 && sum == 0))
                     {