From ee14a418c007c74554aa52e86282217e23580560 Mon Sep 17 00:00:00 2001
From: morkt <muvluv.ru@gmail.com>
Date: Wed, 16 Sep 2015 23:54:35 +0400
Subject: [PATCH] (FileSystemStack.ChDir): propagate
 OperationCanceledException.

---
 GameRes/FileSystem.cs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/GameRes/FileSystem.cs b/GameRes/FileSystem.cs
index 7aaccdf3..3f5ee865 100644
--- a/GameRes/FileSystem.cs
+++ b/GameRes/FileSystem.cs
@@ -477,7 +477,12 @@ namespace GameRes
             Flush();
             var arc = ArcFile.TryOpen (entry.Name);
             if (null == arc)
-                throw new UnknownFormatException();
+            {
+                if (FormatCatalog.Instance.LastError is OperationCanceledException)
+                    throw FormatCatalog.Instance.LastError;
+                else
+                    throw new UnknownFormatException();
+            }
             try
             {
                 Push (entry.Name, arc.CreateFileSystem());