From e85151483ccd9e2c002ba8e6808d3598056a5851 Mon Sep 17 00:00:00 2001
From: andrey1s <andrey@4devs.pro>
Date: Mon, 5 Mar 2018 11:57:35 +0300
Subject: [PATCH] [Config] ReflectionClassResource check abstract
 ServiceSubscriberInterface and EventSubscriberInterface

---
 .../Component/Config/Resource/ReflectionClassResource.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/Symfony/Component/Config/Resource/ReflectionClassResource.php b/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
index 149789aa367d..822b78568d3b 100644
--- a/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
+++ b/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
@@ -155,12 +155,16 @@ private function generateSignature(\ReflectionClass $class)
             }
         }
 
-        if ($class->isSubclassOf(EventSubscriberInterface::class)) {
+        if ($class->isAbstract() || $class->isInterface() || $class->isTrait()) {
+            return;
+        }
+
+        if (interface_exists(EventSubscriberInterface::class, false) && $class->isSubclassOf(EventSubscriberInterface::class)) {
             yield EventSubscriberInterface::class;
             yield print_r(\call_user_func(array($class->name, 'getSubscribedEvents')), true);
         }
 
-        if ($class->isSubclassOf(ServiceSubscriberInterface::class)) {
+        if (interface_exists(ServiceSubscriberInterface::class, false) && $class->isSubclassOf(ServiceSubscriberInterface::class)) {
             yield ServiceSubscriberInterface::class;
             yield print_r(\call_user_func(array($class->name, 'getSubscribedServices')), true);
         }