Actualización

vendor/knplabs/knp-menu-bundle/src/DependencyInjection/Compiler/AddProvidersPass.php

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+<?php
+namespace Knp\Bundle\MenuBundle\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Argument\IteratorArgument;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * This compiler pass registers the providers in the ChainProvider.
+ *
+ * @author Christophe Coevoet <stof@notk.org>
+ *
+ * @internal
+ */
+class AddProvidersPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        if (!$container->hasDefinition('knp_menu.menu_provider.chain')) {
+            return;
+        }
+
+        $providers = [];
+        foreach ($container->findTaggedServiceIds('knp_menu.provider') as $id => $tags) {
+            $providers[] = new Reference($id);
+        }
+
+        if (1 === count($providers)) {
+            // Use an alias instead of wrapping it in the ChainProvider for performances
+            // when using only one (the default case as the bundle defines one provider)
+            $container->setAlias('knp_menu.menu_provider', (string) reset($providers));
+        } else {
+            if (class_exists(IteratorArgument::class)) {
+                $providers = new IteratorArgument($providers);
+            }
+
+            $definition = $container->getDefinition('knp_menu.menu_provider.chain');
+            $definition->replaceArgument(0, $providers);
+            $container->setAlias('knp_menu.menu_provider', 'knp_menu.menu_provider.chain');
+        }
+    }
+}