From 9d5cefa518d9522fb27bc9b1a47ddddb22c884f5 Mon Sep 17 00:00:00 2001
From: sakno <roman.sakno@gmail.com>
Date: Wed, 25 Oct 2023 20:52:41 +0300
Subject: [PATCH] Fixed Insertion test regression

---
 src/DotNext/Buffers/PooledArrayBufferWriter.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/DotNext/Buffers/PooledArrayBufferWriter.cs b/src/DotNext/Buffers/PooledArrayBufferWriter.cs
index e0d5c3c2e..38699bf0a 100644
--- a/src/DotNext/Buffers/PooledArrayBufferWriter.cs
+++ b/src/DotNext/Buffers/PooledArrayBufferWriter.cs
@@ -507,7 +507,9 @@ private static void CopyFast(T[] source, T[] destination, int length)
         Debug.Assert(length <= source.Length);
         Debug.Assert(length <= destination.Length);
 
-        source.CopyTo(MemoryMarshal.CreateSpan(ref MemoryMarshal.GetArrayDataReference(destination), length));
+        var src = MemoryMarshal.CreateReadOnlySpan(ref MemoryMarshal.GetArrayDataReference(source), length);
+        var dest = MemoryMarshal.CreateSpan(ref MemoryMarshal.GetArrayDataReference(destination), length);
+        src.CopyTo(dest);
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]