From 5ffdf4dd60a42b5a8d8278bb52e1f23a1e8b8f9e Mon Sep 17 00:00:00 2001
From: Warren Buckley <warren@umbraco.com>
Date: Mon, 22 Jan 2018 14:20:01 +0000
Subject: [PATCH] Fixes U4-10852 Where the ZipArchive stream was closed -
 'Cannot access a closed Stream'

---
 .../businesslogic/Packager/PackageInstance/utill.cs           | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/umbraco.cms/businesslogic/Packager/PackageInstance/utill.cs b/src/umbraco.cms/businesslogic/Packager/PackageInstance/utill.cs
index 1bf981f516..4b34fbfda2 100644
--- a/src/umbraco.cms/businesslogic/Packager/PackageInstance/utill.cs
+++ b/src/umbraco.cms/businesslogic/Packager/PackageInstance/utill.cs
@@ -283,8 +283,8 @@ namespace umbraco.cms.businesslogic.packager
             // find number of chars to remove from orginal file path
 
             using (var memoryStream = new MemoryStream())
-            {
-                using (var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create))
+            {   
+                using (var archive = new ZipArchive(memoryStream, ZipArchiveMode.Create, true))
                 {
                     foreach (string file in ar)
                     {