From c8bc22e5f26733cad9c7c43747798e8895d993f1 Mon Sep 17 00:00:00 2001
From: Samuel ROZE <samuel.roze@gmail.com>
Date: Mon, 13 Nov 2017 13:35:01 +0000
Subject: [PATCH] Do not throw when `setSaveHandler` is called and headers have
 already been sent

---
 .../HttpFoundation/Session/Storage/NativeSessionStorage.php   | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
index e35af4e291a70..7ef2c664b84c1 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
@@ -395,10 +395,6 @@ public function setSaveHandler($saveHandler = null)
             throw new \InvalidArgumentException('Must be instance of AbstractProxy or NativeSessionHandler; implement \SessionHandlerInterface; or be null.');
         }
 
-        if (headers_sent($file, $line)) {
-            throw new \RuntimeException(sprintf('Failed to set the session handler because headers have already been sent by "%s" at line %d.', $file, $line));
-        }
-
         // Wrap $saveHandler in proxy and prevent double wrapping of proxy
         if (!$saveHandler instanceof AbstractProxy && $saveHandler instanceof \SessionHandlerInterface) {
             $saveHandler = new SessionHandlerProxy($saveHandler);