From ab9ed1146fa90adf4ce5b23c95a61744f2e65566 Mon Sep 17 00:00:00 2001
From: sakno <roman.sakno@gmail.com>
Date: Wed, 25 Oct 2023 21:12:04 +0300
Subject: [PATCH] Fixed regression of WriterAsReadOnlyCollection test

---
 src/DotNext/Buffers/PooledArrayBufferWriter.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/DotNext/Buffers/PooledArrayBufferWriter.cs b/src/DotNext/Buffers/PooledArrayBufferWriter.cs
index af8593050..5ad48ea36 100644
--- a/src/DotNext/Buffers/PooledArrayBufferWriter.cs
+++ b/src/DotNext/Buffers/PooledArrayBufferWriter.cs
@@ -104,7 +104,10 @@ public ArrayPool<T>? BufferPool
 
     /// <inheritdoc/>
     void ICollection<T>.CopyTo(T[] array, int arrayIndex)
-        => buffer.CopyTo(array.AsSpan(arrayIndex, position));
+    {
+        var source = MemoryMarshal.CreateReadOnlySpan(ref MemoryMarshal.GetArrayDataReference(buffer), position);
+        source.CopyTo(array.AsSpan(arrayIndex));
+    }
 
     /// <summary>
     /// Gets the element at the specified index.