From fda57bbb32c7c08e750f9ed82d30d95052f927b5 Mon Sep 17 00:00:00 2001
From: Andy Shaw <andy.shaw@qt.io>
Date: Mon, 18 Mar 2019 14:32:48 +0100
Subject: QTemporaryFile: Return early if the passed in QFile cannot be opened

Change-Id: I97f00163c24f74d31e1b41ec7337f72600bda2d5
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Mikhail Svetkin <mikhail.svetkin@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/io/qtemporaryfile.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/corelib/io/qtemporaryfile.cpp b/src/corelib/io/qtemporaryfile.cpp
index 35bb465a04..ced08a9a87 100644
--- a/src/corelib/io/qtemporaryfile.cpp
+++ b/src/corelib/io/qtemporaryfile.cpp
@@ -908,8 +908,8 @@ QTemporaryFile *QTemporaryFile::createNativeFile(QFile &file)
         qint64 old_off = 0;
         if(wasOpen)
             old_off = file.pos();
-        else
-            file.open(QIODevice::ReadOnly);
+        else if (!file.open(QIODevice::ReadOnly))
+            return nullptr;
         //dump data
         QTemporaryFile *ret = new QTemporaryFile;
         if (ret->open()) {
-- 
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