From f238be6003b7b2350a5457c3798ebef9d4fbdfa7 Mon Sep 17 00:00:00 2001
From: Adam Hathcock <adam@hathcock.uk>
Date: Wed, 29 Oct 2025 10:35:03 +0000
Subject: [PATCH] add arraypool usage in init

---
 .../Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs          | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs
index 6ee5463a..d7890e94 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV2017/Unpack.unpack_cpp.cs
@@ -1,6 +1,7 @@
 #nullable disable
 
 using System;
+using System.Buffers;
 using SharpCompress.Common;
 using static SharpCompress.Compressors.Rar.UnpackV2017.PackDef;
 using static SharpCompress.Compressors.Rar.UnpackV2017.UnpackGlobal;
@@ -110,7 +111,7 @@ internal sealed partial class Unpack : BitInput
             throw new InvalidFormatException("Grow && Fragmented");
         }
 
-        var NewWindow = Fragmented ? null : new byte[WinSize];
+        var NewWindow = Fragmented ? null : ArrayPool<byte>.Shared.Rent((int)WinSize);
 
         if (NewWindow == null)
         {
@@ -126,6 +127,7 @@ internal sealed partial class Unpack : BitInput
                 if (Window != null) // If allocated by preceding files.
                 {
                     //free(Window);
+                    ArrayPool<byte>.Shared.Return(Window);
                     Window = null;
                 }
                 FragWindow.Init(WinSize);