From 4d2917eef62f1d785371212a9c9661240f376eba Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Tue, 11 Dec 2018 18:05:48 -0800
Subject: [PATCH 1/2] Downgrade System.Buffers to 4.4.0

---
 src/SixLabors.Core/SixLabors.Core.csproj | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SixLabors.Core/SixLabors.Core.csproj b/src/SixLabors.Core/SixLabors.Core.csproj
index 7454cc2..7dd934b 100644
--- a/src/SixLabors.Core/SixLabors.Core.csproj
+++ b/src/SixLabors.Core/SixLabors.Core.csproj
@@ -48,7 +48,7 @@
     </ItemGroup>  
 
     <ItemGroup Condition=" '$(TargetFramework)' != 'netcoreapp2.1' ">
-        <PackageReference Include="System.Buffers" Version="4.5.0" />
+        <PackageReference Include="System.Buffers" Version="4.4.0" />
         <PackageReference Include="System.Memory" Version="4.5.1" />
     </ItemGroup>
 

From 6190ef049f7eb673d2f5e74969d9d4dd3e8e6f3b Mon Sep 17 00:00:00 2001
From: Jason Nelson <jason@carbonmade.com>
Date: Tue, 11 Dec 2018 18:05:58 -0800
Subject: [PATCH 2/2] Remove HashHelpers

---
 src/SixLabors.Core/Helpers/HashHelpers.cs     | 67 -------------------
 .../Helpers/HashHelpersTests.cs               | 28 --------
 2 files changed, 95 deletions(-)
 delete mode 100644 src/SixLabors.Core/Helpers/HashHelpers.cs
 delete mode 100644 tests/SixLabors.Core.Tests/Helpers/HashHelpersTests.cs

diff --git a/src/SixLabors.Core/Helpers/HashHelpers.cs b/src/SixLabors.Core/Helpers/HashHelpers.cs
deleted file mode 100644
index b624178..0000000
--- a/src/SixLabors.Core/Helpers/HashHelpers.cs
+++ /dev/null
@@ -1,67 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using System;
-
-namespace SixLabors
-{
-    /// <summary>
-    /// Provides a set of helpers for combining object hashes.
-    /// </summary>
-    internal static class HashHelpers
-    {
-        /// <summary>
-        /// Combines the two specified hash codes.
-        /// </summary>
-        /// <param name="h1">Hash code one</param>
-        /// <param name="h2">Hash code two</param>
-        /// <returns>Returns a hash code for the provided hash codes.</returns>
-        [Obsolete("Use HashCode.Combine instead")]
-        public static int Combine(int h1, int h2)
-        {
-            // Lifted from coreFX repo
-            unchecked
-            {
-                // RyuJIT optimizes this to use the ROL instruction
-                // Related GitHub pull request: dotnet/coreclr#1830
-                uint rol5 = ((uint)h1 << 5) | ((uint)h1 >> 27);
-                return ((int)rol5 + h1) ^ h2;
-            }
-        }
-
-        /// <summary>
-        /// Combines the three specified hash codes.
-        /// </summary>
-        /// <param name="h1">The first </param>
-        /// <param name="h2">Hash code two</param>
-        /// <param name="h3">Hash code three</param>
-        /// <returns>Returns a hash code for the provided hash codes.</returns>
-        [Obsolete("Use HashCode.Combine instead")]
-        public static int Combine(int h1, int h2, int h3)
-        {
-            int hash = Combine(h1, h2);
-
-            hash = Combine(hash, h3);
-
-            return hash;
-        }
-
-        /// <summary>
-        /// Combines the four specified hash codes.
-        /// </summary>
-        /// <param name="h1">The first </param>
-        /// <param name="h2">Hash code two</param>
-        /// <param name="h3">Hash code three</param>
-        /// <param name="h4">Hash code four</param>
-        /// <returns>Returns a hash code for the provided hash codes.</returns>
-        [Obsolete("Use HashCode.Combine instead")]
-        public static int Combine(int h1, int h2, int h3, int h4)
-        {
-            int hash = Combine(h1, h2);
-
-            hash = Combine(hash, h3);
-
-            return Combine(hash, h4);
-        }
-    }
-}
\ No newline at end of file
diff --git a/tests/SixLabors.Core.Tests/Helpers/HashHelpersTests.cs b/tests/SixLabors.Core.Tests/Helpers/HashHelpersTests.cs
deleted file mode 100644
index 7091038..0000000
--- a/tests/SixLabors.Core.Tests/Helpers/HashHelpersTests.cs
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright (c) Six Labors and contributors.
-// Licensed under the Apache License, Version 2.0.
-
-using Xunit;
-
-namespace SixLabors.Tests.Helpers
-{
-    public class HashHelpersTests
-    {
-        [Fact]
-        public void CanCombineTwoValues()
-        {
-            Assert.Equal(35, HashHelpers.Combine(1, 2));
-        }
-
-        [Fact]
-        public void CanCombineThreeValues()
-        {
-            Assert.Equal(1152, HashHelpers.Combine(1, 2, 3));
-        }
-
-        [Fact]
-        public void CanCombineFourValues()
-        {
-            Assert.Equal(38020, HashHelpers.Combine(1, 2, 3, 4));
-        }
-    }
-}
\ No newline at end of file