From a070493fbab0fe75e397e75bf7c0fd3ff18b75ed Mon Sep 17 00:00:00 2001
From: majorro <majorrowk@gmail.com>
Date: Mon, 13 Jan 2025 23:26:49 +0300
Subject: [PATCH] window null checks

---
 src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
index be55b7bb..6cadcede 100644
--- a/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
+++ b/src/SharpCompress/Compressors/Rar/UnpackV1/Unpack.cs
@@ -29,6 +29,7 @@ internal sealed partial class Unpack : BitInput, IRarUnpack, IDisposable
             if (!externalWindow)
             {
                 ArrayPool<byte>.Shared.Return(window);
+                window = null;
             }
             disposed = true;
         }
@@ -125,11 +126,11 @@ internal sealed partial class Unpack : BitInput, IRarUnpack, IDisposable
 
     private void Init(byte[] window)
     {
-        if (window is null)
+        if (this.window is null && window is null)
         {
             this.window = ArrayPool<byte>.Shared.Rent(PackDef.MAXWINSIZE);
         }
-        else
+        else if (window is not null)
         {
             this.window = window;
             externalWindow = true;