From 8df535dbf9eabfec1b636b6d49913dd40bcaa428 Mon Sep 17 00:00:00 2001
From: Andreas <anlutro@gmail.com>
Date: Mon, 6 Jan 2014 09:15:29 +0100
Subject: [PATCH] [BrowserKit] Throw exception on invalid cookie expiration
 timestamp

---
 src/Symfony/Component/BrowserKit/Cookie.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/BrowserKit/Cookie.php b/src/Symfony/Component/BrowserKit/Cookie.php
index bce5613cf7a6..02194a14bfaf 100644
--- a/src/Symfony/Component/BrowserKit/Cookie.php
+++ b/src/Symfony/Component/BrowserKit/Cookie.php
@@ -81,6 +81,8 @@ public function __construct($name, $value, $expires = null, $path = null, $domai
      *
      * @return string The HTTP representation of the Cookie
      *
+     * @throws \UnexpectedValueException
+     *
      * @api
      */
     public function __toString()
@@ -88,7 +90,13 @@ public function __toString()
         $cookie = sprintf('%s=%s', $this->name, $this->rawValue);
 
         if (null !== $this->expires) {
-            $cookie .= '; expires='.substr(\DateTime::createFromFormat('U', $this->expires, new \DateTimeZone('GMT'))->format(self::$dateFormats[0]), 0, -5);
+            $dateTime = \DateTime::createFromFormat('U', $this->expires, new \DateTimeZone('GMT'));
+
+            if ($dateTime === false) {
+                throw new \UnexpectedValueException(sprintf('The cookie expiration time "%s" is not valid.'), $this->expires);
+            }
+
+            $cookie .= '; expires='.substr($dateTime->format(self::$dateFormats[0]), 0, -5);
         }
 
         if ('' !== $this->domain) {