[DI] Cleanup unused service_subscriber.locator tag

Author: ro0NL

Compiler/ResolveServiceSubscribersPass.php

@@ -35,7 +35,12 @@ protected function processValue($value, $isRoot = false)
         }
 
         $serviceLocator = $this->serviceLocator;
-        $this->serviceLocator = $value->hasTag('container.service_subscriber.locator') ? $value->getTag('container.service_subscriber.locator')[0]['id'] : null;
+        $this->serviceLocator = null;
+
+        if ($value->hasTag('container.service_subscriber.locator')) {
+            $this->serviceLocator = $value->getTag('container.service_subscriber.locator')[0]['id'];
+            $value->clearTag('container.service_subscriber.locator');
+        }
 
         try {
             return parent::processValue($value);