Merge branch '6.4' into 7.1

* 6.4:
  [DoctrineBridge] Fix Connection::createSchemaManager() for Doctrine DBAL v2
  [HttpClient] Various cleanups after recent changes
  do not add child nodes to EmptyNode instances
  consider write property visibility to decide whether a property is writable
  add comment explaining why HttpClient tests are run separately
  silence warnings issued by Redis Sentinel on connection issues

NodeVisitor/TranslationDefaultDomainNodeVisitor.php

@@ -15,6 +15,7 @@
 use Symfony\Bridge\Twig\Node\TransNode;
 use Twig\Environment;
 use Twig\Node\BlockNode;
+use Twig\Node\EmptyNode;
 use Twig\Node\Expression\ArrayExpression;
 use Twig\Node\Expression\AssignNameExpression;
 use Twig\Node\Expression\ConstantExpression;
@@ -70,6 +71,12 @@ public function enterNode(Node $node, Environment $env): Node
 
         if ($node instanceof FilterExpression && 'trans' === ($node->hasAttribute('twig_callable') ? $node->getAttribute('twig_callable')->getName() : $node->getNode('filter')->getAttribute('value'))) {
             $arguments = $node->getNode('arguments');
+
+            if ($arguments instanceof EmptyNode) {
+                $arguments = new Nodes();
+                $node->setNode('arguments', $arguments);
+            }
+
             if ($this->isNamedArguments($arguments)) {
                 if (!$arguments->hasNode('domain') && !$arguments->hasNode(1)) {
                     $arguments->setNode('domain', $this->scope->get('domain'));