From a8bc49c996934b0c31da7506bb855c0becce802d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Benoist?=
 <j0k3r@users.noreply.github.com>
Date: Wed, 24 Jul 2019 14:45:25 +0200
Subject: [PATCH] Prevent concurrent writes

Concurrent writes might lead to invalid JSON being saved in the cookie jar.
---
 src/Cookie/FileCookieJar.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Cookie/FileCookieJar.php b/src/Cookie/FileCookieJar.php
index 9887c1d5..0de80909 100644
--- a/src/Cookie/FileCookieJar.php
+++ b/src/Cookie/FileCookieJar.php
@@ -56,7 +56,7 @@ class FileCookieJar extends CookieJar
         }
 
         $jsonStr = \GuzzleHttp\json_encode($json);
-        if (false === file_put_contents($filename, $jsonStr)) {
+        if (false === file_put_contents($filename, $jsonStr, LOCK_EX)) {
             throw new \RuntimeException("Unable to save file {$filename}");
         }
     }