From 310e5c7549f85916304e8dda2479613eeb0892fd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Deruss=C3=A9?= <jeremy@derusse.com>
Date: Fri, 9 Aug 2019 11:49:26 +0200
Subject: [PATCH] Fix unitialized variable in DeprecationErrorHandler

---
 src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php b/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
index 8b355c31ff..22dbb829f9 100644
--- a/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
+++ b/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
@@ -48,7 +48,6 @@ class DeprecationErrorHandler
         }
 
         $UtilPrefix = class_exists('PHPUnit_Util_ErrorHandler') ? 'PHPUnit_Util_' : 'PHPUnit\Util\\';
-        self::$isAtLeastPhpUnit83 = method_exists('PHPUnit\Util\ErrorHandler', '__invoke');
 
         $getMode = function () use ($mode) {
             static $memoizedMode = false;
@@ -304,6 +303,9 @@ class DeprecationErrorHandler
      */
     public static function getPhpUnitErrorHandler()
     {
+        if (!isset(self::$isAtLeastPhpUnit83)) {
+            self::$isAtLeastPhpUnit83 = class_exists(ErrorHandler::class) && method_exists(ErrorHandler::class, '__invoke');
+        }
         if (!self::$isAtLeastPhpUnit83) {
             return (class_exists('PHPUnit_Util_ErrorHandler', false) ? 'PHPUnit_Util_' : 'PHPUnit\Util\\').'ErrorHandler::handleError';
         }