Merge branch '3.3' into 3.4

* 3.3:
  [HttpKernel] DebugHandlersListener should always replace the existing exception handler
  fix the Composer API being used
  [Debug] Always decorate existing exception handlers to deal with fatal errors
  Enableable ArrayNodeDefinition is disabled for empty configuration
  Fixing a bug where the dump() function depended on bundle ordering
  [Cache] Fix handling of apcu_fetch() edgy behavior
  Add nn (Norwegian Nynorsk) translation files, and improve existing file
  Problem in phar see mergerequest symfony#25579
  [Form] Disallow transform dates beyond the year 9999
  Copied NO language files to the new NB locale.
  [Serializer] DateTimeNormalizer handling of null and empty values (returning null or empty instead of new object)
  [Console] Improve phpdoc on StyleInterface::ask()

Author: nicolas-grekas

.github/build-packages.php

@@ -49,8 +49,8 @@
 
     $packages[$package->name][$package->version] = $package;
 
-    $versions = file_get_contents('https://packagist.org/packages/'.$package->name.'.json');
-    $versions = json_decode($versions)->package->versions;
+    $versions = file_get_contents('https://packagist.org/p/'.$package->name.'.json');
+    $versions = json_decode($versions)->packages->{$package->name};
 
     if ($package->version === str_replace('-dev', '.x-dev', $versions->{'dev-master'}->extra->{'branch-alias'}->{'dev-master'})) {
         unset($versions->{'dev-master'});

.travis.yml

@@ -195,7 +195,7 @@ install:
           elif [[ $deps = low ]]; then
               echo "$COMPONENTS" | parallel --gnu -j10% "tfold {} 'cd {} && $COMPOSER_UP --prefer-lowest --prefer-stable && $PHPUNIT_X'"
           elif [[ $PHP = hhvm* ]]; then
-              $PHPUNIT --exclude-group benchmark,intl-data
+              $PHPUNIT --exclude-group no-hhvm,benchmark,intl-data
           else
               echo "$COMPONENTS" | parallel --gnu "tfold {} $PHPUNIT_X {}"
               tfold tty-group $PHPUNIT --group tty

src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php

@@ -75,7 +75,11 @@ public function process(ContainerBuilder $container)
 
         if ($container->getParameter('kernel.debug')) {
             $container->getDefinition('twig.extension.profiler')->addTag('twig.extension');
-            $container->getDefinition('twig.extension.debug')->addTag('twig.extension');
+
+            // only register if the improved version from DebugBundle is *not* present
+            if (!$container->has('twig.extension.dump')) {
+                $container->getDefinition('twig.extension.debug')->addTag('twig.extension');
+            }
         }
 
         $twigLoader = $container->getDefinition('twig.loader.native_filesystem');

src/Symfony/Component/Cache/Tests/Adapter/ApcuAdapterTest.php

@@ -29,7 +29,7 @@ public function createCachePool($defaultLifetime = 0)
         }
         if ('cli' === PHP_SAPI && !ini_get('apc.enable_cli')) {
             if ('testWithCliSapi' !== $this->getName()) {
-                $this->markTestSkipped('APCu extension is required.');
+                $this->markTestSkipped('apc.enable_cli=1 is required.');
             }
         }
         if ('\\' === DIRECTORY_SEPARATOR) {

src/Symfony/Component/Cache/Traits/ApcuTrait.php

@@ -52,7 +52,11 @@ private function init($namespace, $defaultLifetime, $version)
     protected function doFetch(array $ids)
     {
         try {
-            return apcu_fetch($ids) ?: array();
+            foreach (apcu_fetch($ids, $ok) ?: array() as $k => $v) {
+                if (null !== $v || $ok) {
+                    yield $k => $v;
+                }
+            }
         } catch (\Error $e) {
             throw new \ErrorException($e->getMessage(), $e->getCode(), E_ERROR, $e->getFile(), $e->getLine());
         }

src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php

@@ -283,7 +283,9 @@ public function canBeEnabled()
             ->beforeNormalization()
                 ->ifArray()
                 ->then(function ($v) {
-                    $v['enabled'] = isset($v['enabled']) ? $v['enabled'] : true;
+                    if (!isset($v['enabled'])) {
+                        $v['enabled'] = !empty($v);
+                    }
 
                     return $v;
                 })

src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php

@@ -207,6 +207,20 @@ public function testCanBeDisabled()
         $this->assertTrue($this->getField($enabledNode, 'defaultValue'));
     }
 
+    public function testEnableableNodeIsDisabledForEmptyConfigurationWhenNormalized()
+    {
+        $config = array();
+
+        $node = new ArrayNodeDefinition('root');
+        $node->canBeEnabled();
+
+        $this->assertEquals(
+            array('enabled' => false),
+            $node->getNode()->normalize($config),
+            'An enableable node is disabled by default'
+        );
+    }
+
     public function testIgnoreExtraKeys()
     {
         $node = new ArrayNodeDefinition('root');
@@ -282,6 +296,7 @@ public function getEnableableNodeFixtures()
             array(array('enabled' => true, 'foo' => 'baz'), array(array('foo' => 'baz')), 'any configuration enables an enableable node'),
             array(array('enabled' => false, 'foo' => 'baz'), array(array('foo' => 'baz', 'enabled' => false)), 'An enableable node can be disabled'),
             array(array('enabled' => false, 'foo' => 'bar'), array(false), 'false disables an enableable node'),
+            array(array('enabled' => false, 'foo' => 'bar'), array(), 'enableable node is disabled by default'),
         );
     }
 

src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Config\Tests\Definition\Builder;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Config\Definition\Processor;
 use Symfony\Component\Config\Tests\Fixtures\Builder\NodeBuilder as CustomNodeBuilder;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 
@@ -131,4 +132,22 @@ public function testDefinitionExampleGetsTransferredToNode()
         $this->assertInternalType('array', $tree->getExample());
         $this->assertEquals('example', $children['child']->getExample());
     }
+
+    public function testRootNodeThatCanBeEnabledIsDisabledByDefault()
+    {
+        $builder = new TreeBuilder();
+
+        $builder->root('test')
+            ->canBeEnabled();
+
+        $tree = $builder->buildTree();
+        $children = $tree->getChildren();
+
+        $this->assertFalse($children['enabled']->getDefaultValue());
+
+        $processor = new Processor();
+        $result = $processor->process($tree, array());
+
+        $this->assertEquals(array('enabled' => false), $result);
+    }
 }

src/Symfony/Component/Console/Style/StyleInterface.php

@@ -91,7 +91,7 @@ public function table(array $headers, array $rows);
      * @param string|null   $default
      * @param callable|null $validator
      *
-     * @return string
+     * @return mixed
      */
     public function ask($question, $default = null, $validator = null);
 
@@ -101,7 +101,7 @@ public function ask($question, $default = null, $validator = null);
      * @param string        $question
      * @param callable|null $validator
      *
-     * @return string
+     * @return mixed
      */
     public function askHidden($question, $validator = null);
 
@@ -122,7 +122,7 @@ public function confirm($question, $default = true);
      * @param array           $choices
      * @param string|int|null $default
      *
-     * @return string
+     * @return mixed
      */
     public function choice($question, array $choices, $default = null);
 

src/Symfony/Component/Console/Style/SymfonyStyle.php

@@ -279,7 +279,7 @@ public function createProgressBar($max = 0)
     }
 
     /**
-     * @return string
+     * @return mixed
      */
     public function askQuestion(Question $question)
     {