Issue #1986690 by fabpot: Fixed Removed double registration of RegisterKernelListenersPass.

core/lib/Drupal/Core/CoreBundle.php

@@ -51,8 +51,6 @@ public function build(ContainerBuilder $container) {
     $container->addCompilerPass(new RegisterRouteFiltersPass());
     // Add a compiler pass for registering event subscribers.
     $container->addCompilerPass(new RegisterKernelListenersPass(), PassConfig::TYPE_AFTER_REMOVING);
-    // Add a compiler pass for registering event subscribers.
-    $container->addCompilerPass(new RegisterKernelListenersPass(), PassConfig::TYPE_AFTER_REMOVING);
     $container->addCompilerPass(new RegisterAccessChecksPass());
     // Add a compiler pass for upcasting of entity route parameters.
     $container->addCompilerPass(new RegisterParamConvertersPass());