From d8104a4d7cb2ff6c9817d5472f7761c7dadb9eb8 Mon Sep 17 00:00:00 2001
From: Michael Bucari-Tovo <mbucari1@gmail.com>
Date: Tue, 25 Nov 2025 12:28:47 -0700
Subject: [PATCH] Check is stream is disposed before reading position.

---
 Source/AaxDecrypter/AudiobookDownloadBase.cs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/Source/AaxDecrypter/AudiobookDownloadBase.cs b/Source/AaxDecrypter/AudiobookDownloadBase.cs
index f439955e..d807c901 100644
--- a/Source/AaxDecrypter/AudiobookDownloadBase.cs
+++ b/Source/AaxDecrypter/AudiobookDownloadBase.cs
@@ -26,7 +26,17 @@ namespace AaxDecrypter
 		protected string OutputDirectory { get; }
 		public IDownloadOptions DownloadOptions { get; }
 		protected NetworkFileStream InputFileStream => NfsPersister.NetworkFileStream;
-		protected virtual long InputFilePosition => InputFileStream.Position;
+		protected virtual long InputFilePosition
+		{
+			get
+			{
+				//Use try/catch instread of checking CanRead to avoid
+				//a race with the background download completing
+				//between the check and the Position call.
+				try { return InputFileStream.Position; }
+				catch { return InputFileStream.Length; }
+			}
+		}
 		private bool downloadFinished;
 
 		private NetworkFileStreamPersister? m_nfsPersister;