Merge branch '3.4'

* 3.4:
  [TwigBridge] Bootstrap 4 form theme fixes
  [VarDumper] HtmlDumper: fix collapsing nodes with depth <= maxDepth
  Fixing a bug where non-existent classes would cause issues
  Do not activate the cache if Doctrine's cache is not present
  [SecurityBundle] hotfix: update phpdocs on logout url
  [FrameworkBundle] Do not load property_access.xml if the component isn't installed
  [HttpFoundation] Mark new methods on Response as final
  Fixed a few spelling mistakes in Luxembourgish translation
  [TwigBridge] Fix template paths in profiler

src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php

@@ -63,9 +63,18 @@ class TwigDataCollector extends DataCollector implements LateDataCollectorInterf
         $this->data['template_paths'] = array();
 
         $templateFinder = function (Profile $profile) use (&$templateFinder) {
-            if ($profile->isTemplate() && $template = $this->twig->load($profile->getName())->getSourceContext()->getPath()) {
-                $this->data['template_paths'][$profile->getName()] = $template;
+            if ($profile->isTemplate()) {
+                try {
+                    $template = $this->twig->load($name = $profile->getName());
+                } catch (\Twig_Error_Loader $e) {
+                    $template = null;
+                }
+
+                if (null !== $template && '' !== $path = $template->getSourceContext()->getPath()) {
+                    $this->data['template_paths'][$name] = $path;
+                }
             }
+
             foreach ($profile as $p) {
                 $templateFinder($p);
             }

src/Symfony/Bridge/Twig/Resources/views/Form/bootstrap_4_layout.html.twig

@@ -70,11 +70,12 @@
 {# Labels #}
 
 {% block form_label -%}
-    {%- if expanded is defined and expanded -%}
+    {%- if compound is defined and compound -%}
         {%- set element = 'legend' -%}
         {%- set label_attr = label_attr|merge({class: (label_attr.class|default('') ~ ' col-form-legend')|trim}) -%}
+    {%- else -%}
+        {%- set label_attr = label_attr|merge({class: (label_attr.class|default('') ~ ' form-control-label')|trim}) -%}
     {%- endif -%}
-    {%- set label_attr = label_attr|merge({class: (label_attr.class|default('') ~ ' form-control-label')|trim}) -%}
     {{- parent() -}}
 {%- endblock form_label %}
 
@@ -107,7 +108,7 @@
 {# Rows #}
 
 {% block form_row -%}
-    {%- if expanded is defined and expanded -%}
+    {%- if compound is defined and compound -%}
         {%- set element = 'fieldset' -%}
     {%- endif -%}
     <{{ element|default('div') }} class="form-group">

src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php

@@ -242,7 +242,18 @@ EOF
             return false;
         }
 
-        // see if the class exists (only need to trigger autoload once)
-        return class_exists($serviceId) || interface_exists($serviceId, false);
+        // if the id has a \, assume it is a class
+        if (false !== strpos($serviceId, '\\')) {
+            return true;
+        }
+
+        try {
+            $r = new \ReflectionClass($serviceId);
+
+            return true;
+        } catch (\ReflectionException $e) {
+            // the service id is not a valid class/interface
+            return false;
+        }
     }
 }

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bundle\FrameworkBundle\DependencyInjection;
 
 use Doctrine\Common\Annotations\Annotation;
+use Doctrine\Common\Cache\Cache;
 use Symfony\Bundle\FullStack;
 use Symfony\Component\Asset\Package;
 use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
@@ -676,7 +677,7 @@ class Configuration implements ConfigurationInterface
                     ->info('annotation configuration')
                     ->{class_exists(Annotation::class) ? 'canBeDisabled' : 'canBeEnabled'}()
                     ->children()
-                        ->scalarNode('cache')->defaultValue('php_array')->end()
+                        ->scalarNode('cache')->defaultValue(interface_exists(Cache::class) ? 'php_array' : 'none')->end()
                         ->scalarNode('file_cache_dir')->defaultValue('%kernel.cache_dir%/annotations')->end()
                         ->booleanNode('debug')->defaultValue($this->debug)->end()
                     ->end()

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php

@@ -127,9 +127,6 @@ class FrameworkExtension extends Extension
             }
         }
 
-        // Property access is used by both the Form and the Validator component
-        $loader->load('property_access.xml');
-
         // Load Cache configuration first as it is used by other components
         $loader->load('cache.xml');
 
@@ -237,7 +234,7 @@ class FrameworkExtension extends Extension
         $this->registerDebugConfiguration($config['php_errors'], $container, $loader);
         $this->registerRouterConfiguration($config['router'], $container, $loader);
         $this->registerAnnotationsConfiguration($config['annotations'], $container, $loader);
-        $this->registerPropertyAccessConfiguration($config['property_access'], $container);
+        $this->registerPropertyAccessConfiguration($config['property_access'], $container, $loader);
 
         if ($this->isConfigEnabled($container, $config['serializer'])) {
             $this->registerSerializerConfiguration($config['serializer'], $container, $loader);
@@ -1096,8 +1093,14 @@ class FrameworkExtension extends Extension
         }
     }
 
-    private function registerPropertyAccessConfiguration(array $config, ContainerBuilder $container)
+    private function registerPropertyAccessConfiguration(array $config, ContainerBuilder $container, XmlFileLoader $loader)
     {
+        if (!class_exists('Symfony\Component\PropertyAccess\PropertyAccessor')) {
+            return;
+        }
+
+        $loader->load('property_access.xml');
+
         $container
             ->getDefinition('property_accessor')
             ->replaceArgument(0, $config['magic_call'])
@@ -1133,6 +1136,11 @@ class FrameworkExtension extends Extension
 
         $chainLoader = $container->getDefinition('serializer.mapping.chain_loader');
 
+        if (!class_exists('Symfony\Component\PropertyAccess\PropertyAccessor')) {
+            $container->removeAlias('serializer.property_accessor');
+            $container->removeDefinition('serializer.normalizer.object');
+        }
+
         $serializerLoaders = array();
         if (isset($config['enable_annotations']) && $config['enable_annotations']) {
             if (!$this->annotationsConfigEnabled) {

src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php

@@ -296,9 +296,9 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
     }
 
     /**
-     * Get the provider key (i.e. the name of the active firewall).
+     * Get the logout URL.
      *
-     * @return string The provider key
+     * @return string The logout URL
      */
     public function getLogoutUrl()
     {

src/Symfony/Component/HttpFoundation/Response.php

@@ -612,6 +612,8 @@ class Response
      * @param bool $immutable enables or disables the immutable directive
      *
      * @return $this
+     *
+     * @final
      */
     public function setImmutable($immutable = true)
     {
@@ -628,6 +630,8 @@ class Response
      * Returns true if the response is marked as "immutable".
      *
      * @return bool returns true if the response is marked as "immutable"; otherwise false
+     *
+     * @final
      */
     public function isImmutable()
     {

src/Symfony/Component/Validator/Resources/translations/validators.lb.xlf

@@ -140,7 +140,7 @@
             </trans-unit>
             <trans-unit id="38">
                 <source>This value is not a valid language.</source>
-                <target>Dëse Wäert aentsprécht kenger gëlteger Sprooch.</target>
+                <target>Dëse Wäert entsprécht kenger gëlteger Sprooch.</target>
             </trans-unit>
             <trans-unit id="39">
                 <source>This value is not a valid locale.</source>
@@ -180,7 +180,7 @@
             </trans-unit>
             <trans-unit id="48">
                 <source>This value should have exactly {{ limit }} character.|This value should have exactly {{ limit }} characters.</source>
-                <target>Dëse Wäert sollt exactly {{ limit }} Buschtaf hunn.|Dëse Wäert sollt exakt {{ limit }} Buschtawen hunn.</target>
+                <target>Dëse Wäert sollt exakt {{ limit }} Buschtaf hunn.|Dëse Wäert sollt exakt {{ limit }} Buschtawen hunn.</target>
             </trans-unit>
             <trans-unit id="49">
                 <source>The file was only partially uploaded.</source>
@@ -192,7 +192,7 @@
             </trans-unit>
             <trans-unit id="51">
                 <source>No temporary folder was configured in php.ini.</source>
-                <target>Et gouf keen temporären Dossier an der php.ini konfiguréiert.</target>
+                <target>Et gouf keen temporären Dossier an der php.ini konfiguréiert oder den temporären Dossier existéiert net.</target>
             </trans-unit>
             <trans-unit id="52">
                 <source>Cannot write temporary file to disk.</source>
@@ -304,7 +304,7 @@
             </trans-unit>
             <trans-unit id="79">
                 <source>The host could not be resolved.</source>
-                <target>Den Domain-Numm konnt net opgeléist ginn.</target>
+                <target>Den Host-Numm konnt net opgeléist ginn.</target>
             </trans-unit>
             <trans-unit id="80">
                 <source>This value does not match the expected {{ charset }} charset.</source>

src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php

@@ -383,8 +383,9 @@ return function (root, x) {
                 x += elt.parentNode.getAttribute('data-depth')/1;
             }
             elt.setAttribute('data-depth', x);
-            if (elt.className ? 'sf-dump-expanded' !== elt.className : (x > options.maxDepth)) {
-                elt.className = 'sf-dump-expanded';
+            var className = elt.className;
+            elt.className = 'sf-dump-expanded';
+            if (className ? 'sf-dump-expanded' !== className : (x > options.maxDepth)) {
                 toggle(a);
             }
         } else if (/\bsf-dump-ref\b/.test(elt.className) && (a = elt.getAttribute('href'))) {