From 08fee76b4eff2bc82985dd7cd0abe0d10102c39c Mon Sep 17 00:00:00 2001
From: Vladimir Kozlov <vladimir.aienabled.kozlov@gmail.com>
Date: Fri, 8 Sep 2017 19:25:53 +0700
Subject: [PATCH] Fixes Double Dispose() of ZipWritingStream #294
 https://github.com/adamhathcock/sharpcompress/issues/294 (#295)

---
 src/SharpCompress/Writers/Zip/ZipWriter.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/SharpCompress/Writers/Zip/ZipWriter.cs b/src/SharpCompress/Writers/Zip/ZipWriter.cs
index 1f806d53..3a29ac63 100644
--- a/src/SharpCompress/Writers/Zip/ZipWriter.cs
+++ b/src/SharpCompress/Writers/Zip/ZipWriter.cs
@@ -276,6 +276,7 @@ namespace SharpCompress.Writers.Zip
 
             // Flag to prevent throwing exceptions on Dispose
             private bool limitsExceeded;
+            private bool isDisposed;
 
             internal ZipWritingStream(ZipWriter writer, Stream originalStream, ZipCentralDirectoryEntry entry,
                 ZipCompressionMethod zipCompressionMethod, CompressionLevel compressionLevel)
@@ -344,6 +345,13 @@ namespace SharpCompress.Writers.Zip
 
             protected override void Dispose(bool disposing)
             {
+                if (isDisposed)
+                {
+                    return;
+                }
+
+                isDisposed = true;
+
                 base.Dispose(disposing);
                 if (disposing)
                 {