From 3cfb558f03b7f33257c69a1b0e2a1f2f410199c6 Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Tue, 29 Jan 2019 11:03:44 +0100
Subject: [PATCH] [HttpKernel] fix nested calls to serialize when using
 DataCollector

---
 .../Component/HttpKernel/DataCollector/DataCollector.php   | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
index de19678a30d8..4346e0ec0f8e 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
@@ -42,12 +42,15 @@ abstract class DataCollector implements DataCollectorInterface, \Serializable
 
     public function serialize()
     {
-        return serialize($this->data);
+        $trace = debug_backtrace(DEBUG_BACKTRACE_PROVIDE_OBJECT, 2);
+        $isCalledFromOverridingMethod = isset($trace[1]['function'], $trace[1]['object']) && 'serialize' === $trace[1]['function'] && $this === $trace[1]['object'];
+
+        return $isCalledFromOverridingMethod ? $this->data : serialize($this->data);
     }
 
     public function unserialize($data)
     {
-        $this->data = unserialize($data);
+        $this->data = \is_array($data) ? $data : unserialize($data);
     }
 
     /**