From ad6007299813b5449b89545ea2c4170a46051653 Mon Sep 17 00:00:00 2001
From: Nicolas Grekas <nicolas.grekas@gmail.com>
Date: Thu, 18 Feb 2021 18:12:37 +0100
Subject: [PATCH] [EventDispatcher] fix registering subscribers twice on
 edge-case

---
 .../DependencyInjection/RegisterListenersPass.php               | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php b/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php
index 6a333c97d3b0..4b236a5b439b 100644
--- a/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php
+++ b/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php
@@ -149,7 +149,7 @@ public function process(ContainerBuilder $container)
                     continue;
                 }
 
-                $dispatcherDefinitions[] = $container->getDefinition($attributes['dispatcher']);
+                $dispatcherDefinitions[$attributes['dispatcher']] = $container->getDefinition($attributes['dispatcher']);
             }
 
             if (!$dispatcherDefinitions) {