Merge branch '3.3' into 3.4

* 3.3: (22 commits)
  [Routing] Fix resource miss
  [Security] Fixed auth provider authenticate() cannot return void
  declare argument type
  [FrameworkBundle][Serializer] Move normalizer/encoders definitions to xml file & remove unnecessary checks
  streamed response should return $this
  $isClientIpsVali is not used
  content can be a resource
  Adding the Form default theme files to be warmed up in Twig's cache
  Remove BC Break label from `NullDumper` class
  Username and password in basic auth are allowed to contain '.'
  Remove obsolete PHPDoc from UriSigner
  [Serializer] YamlEncoder: throw if the Yaml component isn't installed
  [Serializer] ObjectNormalizer: throw if PropertyAccess isn't installed
  [PropertyInfo] Add support for the iterable type
  pdo session fix
  Fixed pathinfo calculation for requests starting with a question mark.  - fix bad conflict resolving issue  - port symfony/symfony#21968 to 3.3+
  Fixed unsetting from loosely equal keys OrderedHashMap
  add DOMElement as return type in Crawler::getIterator to support foreach support in ide
  Fixed mistake in exception expectation
  [Debug] Fix same vendor detection in class loader
  ...

Author: fabpot

Encoder/YamlEncoder.php

@@ -11,6 +11,7 @@
 
 namespace Symfony\Component\Serializer\Encoder;
 
+use Symfony\Component\Serializer\Exception\RuntimeException;
 use Symfony\Component\Yaml\Dumper;
 use Symfony\Component\Yaml\Parser;
 
@@ -29,6 +30,10 @@ class YamlEncoder implements EncoderInterface, DecoderInterface
 
     public function __construct(Dumper $dumper = null, Parser $parser = null, array $defaultContext = array())
     {
+        if (!class_exists(Dumper::class)) {
+            throw new RuntimeException('The YamlEncoder class requires the "Yaml" component. Install "symfony/yaml" to use it.');
+        }
+
         $this->dumper = $dumper ?: new Dumper();
         $this->parser = $parser ?: new Parser();
         $this->defaultContext = array_merge($this->defaultContext, $defaultContext);

Normalizer/ObjectNormalizer.php

@@ -15,6 +15,7 @@
 use Symfony\Component\PropertyAccess\PropertyAccess;
 use Symfony\Component\PropertyAccess\PropertyAccessorInterface;
 use Symfony\Component\PropertyInfo\PropertyTypeExtractorInterface;
+use Symfony\Component\Serializer\Exception\RuntimeException;
 use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface;
 use Symfony\Component\Serializer\NameConverter\NameConverterInterface;
 
@@ -32,6 +33,10 @@ class ObjectNormalizer extends AbstractObjectNormalizer
 
     public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null, PropertyAccessorInterface $propertyAccessor = null, PropertyTypeExtractorInterface $propertyTypeExtractor = null)
     {
+        if (!class_exists('Symfony\Component\PropertyAccess\PropertyAccess')) {
+            throw new RuntimeException('The ObjectNormalizer class requires the "PropertyAccess" component. Install "symfony/property-access" to use it.');
+        }
+
         parent::__construct($classMetadataFactory, $nameConverter, $propertyTypeExtractor);
 
         $this->propertyAccessor = $propertyAccessor ?: PropertyAccess::createPropertyAccessor();