From 3447222b68242e80a0a88fe719afab2e90205766 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1chym=20Tou=C5=A1ek?= <enumag@gmail.com>
Date: Thu, 21 Feb 2019 12:47:58 +0100
Subject: [PATCH] [HttpKernel] Fix possible infinite loop of exceptions

---
 .../HttpKernel/EventListener/ExceptionListener.php         | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
index 67db029af173..e7e36d188bde 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
@@ -56,13 +56,12 @@ public function onKernelException(GetResponseForExceptionEvent $event)
         } catch (\Exception $e) {
             $this->logException($e, sprintf('Exception thrown when handling an exception (%s: %s at %s line %s)', \get_class($e), $e->getMessage(), $e->getFile(), $e->getLine()));
 
-            $wrapper = $e;
-
-            while ($prev = $wrapper->getPrevious()) {
+            $prev = $e;
+            do {
                 if ($exception === $wrapper = $prev) {
                     throw $e;
                 }
-            }
+            } while ($prev = $wrapper->getPrevious());
 
             $prev = new \ReflectionProperty($wrapper instanceof \Exception ? \Exception::class : \Error::class, 'previous');
             $prev->setAccessible(true);