From 550fecd4d3a8d31e9daa9af2c6425e05abf63e73 Mon Sep 17 00:00:00 2001
From: coderb <coderbri@gmail.com>
Date: Mon, 23 Oct 2017 06:58:02 -0400
Subject: [PATCH] bugfix: eliminate spurious rar crc exception when Read() is
 called with count = 0 (#313)

---
 src/SharpCompress/Compressors/Rar/RarCrcStream.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SharpCompress/Compressors/Rar/RarCrcStream.cs b/src/SharpCompress/Compressors/Rar/RarCrcStream.cs
index 3760d252..3a46cd77 100644
--- a/src/SharpCompress/Compressors/Rar/RarCrcStream.cs
+++ b/src/SharpCompress/Compressors/Rar/RarCrcStream.cs
@@ -31,7 +31,7 @@ namespace SharpCompress.Compressors.Rar {
             {
                 currentCrc = RarCRC.CheckCrc(currentCrc, buffer, offset, result);
             } 
-            else if (GetCrc() != readStream.CurrentCrc)
+            else if (GetCrc() != readStream.CurrentCrc && count != 0)
             {
                 // NOTE: we use the last FileHeader in a multipart volume to check CRC
                 throw new InvalidFormatException("file crc mismatch");