Merge branch '5.4' into 6.0

* 5.4:
  [redis-messenger] remove undefined array key warnings
  do not pass DBAL connections to PDO adapters
  [HttpFoundation] Fix PHP 8.1 deprecation in isNotModified

Author: fabpot

DependencyInjection/Configuration.php

@@ -16,6 +16,7 @@
 use Psr\Log\LogLevel;
 use Symfony\Bundle\FullStack;
 use Symfony\Component\Asset\Package;
+use Symfony\Component\Cache\Adapter\DoctrineAdapter;
 use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
 use Symfony\Component\Config\Definition\Builder\NodeBuilder;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
@@ -1049,7 +1050,7 @@ private function addCacheSection(ArrayNodeDefinition $rootNode, callable $willBe
                         ->scalarNode('default_redis_provider')->defaultValue('redis://localhost')->end()
                         ->scalarNode('default_memcached_provider')->defaultValue('memcached://localhost')->end()
                         ->scalarNode('default_doctrine_dbal_provider')->defaultValue('database_connection')->end()
-                        ->scalarNode('default_pdo_provider')->defaultValue($willBeAvailable('doctrine/dbal', Connection::class) ? 'database_connection' : null)->end()
+                        ->scalarNode('default_pdo_provider')->defaultValue($willBeAvailable('doctrine/dbal', Connection::class) && class_exists(DoctrineAdapter::class) ? 'database_connection' : null)->end()
                         ->arrayNode('pools')
                             ->useAttributeAsKey('name')
                             ->prototype('array')