Merge branch '3.3' into 3.4

* 3.3:
  [DI] Fix dumping with custom base class
  [HttpFoundation] Add test
  [HttpFoundation] Fix session-related BC break
  [Process] Workaround PHP bug #75515 in ProcessTest::testSimpleInputStream()
  fix method name

src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

@@ -126,7 +126,12 @@ class PhpDumper extends Dumper
         $this->asFiles = $options['as_files'];
         $this->hotPathTag = $options['hot_path_tag'];
         $this->inlineRequires = $this->container->hasParameter($options['inline_class_loader_parameter']) && $this->container->getParameter($options['inline_class_loader_parameter']);
-        $this->initializeMethodNamesMap($options['base_class']);
+
+        if (0 !== strpos($baseClass = $options['base_class'], '\\') && 'Container' !== $baseClass) {
+            $baseClass = sprintf('%s\%s', $options['namespace'] ? '\\'.$options['namespace'] : '', $baseClass);
+        }
+
+        $this->initializeMethodNamesMap('Container' === $baseClass ? Container::class : $baseClass);
 
         $this->docStar = $options['debug'] ? '*' : '';
 
@@ -156,7 +161,7 @@ class PhpDumper extends Dumper
         }
 
         $code =
-            $this->startClass($options['class'], $options['base_class']).
+            $this->startClass($options['class'], $baseClass).
             $this->addServices().
             $this->addDefaultParametersMethod().
             $this->endClass()

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php

@@ -16,7 +16,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
  *
  * @final since Symfony 3.3
  */
-class Container extends AbstractContainer
+class Container extends \Symfony\Component\DependencyInjection\Dump\AbstractContainer
 {
     private $parameters;
     private $targetDirs = array();

src/Symfony/Component/Form/Form.php

@@ -49,7 +49,7 @@ use Symfony\Component\PropertyAccess\PropertyPath;
  * either as "Y-m-d" string or as timestamp. Internally we still want to
  * use a DateTime object for processing. To convert the data from string/integer
  * to DateTime you can set a normalization transformer by calling
- * addNormTransformer(). The normalized data is then converted to the displayed
+ * addModelTransformer(). The normalized data is then converted to the displayed
  * data as described before.
  *
  * The conversions (1) -> (2) -> (3) use the transform methods of the transformers.

src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php

@@ -100,12 +100,6 @@ class NativeSessionStorage implements SessionStorageInterface
      */
     public function __construct(array $options = array(), $handler = null, MetadataBag $metaBag = null)
     {
-        $this->setMetadataBag($metaBag);
-
-        if (\PHP_SESSION_ACTIVE === session_status()) {
-            return;
-        }
-
         $options += array(
             'cache_limiter' => '',
             'cache_expire' => 0,
@@ -115,6 +109,7 @@ class NativeSessionStorage implements SessionStorageInterface
 
         session_register_shutdown();
 
+        $this->setMetadataBag($metaBag);
         $this->setOptions($options);
         $this->setSaveHandler($handler);
     }
@@ -349,7 +344,7 @@ class NativeSessionStorage implements SessionStorageInterface
      */
     public function setOptions(array $options)
     {
-        if (headers_sent()) {
+        if (headers_sent() || \PHP_SESSION_ACTIVE === session_status()) {
             return;
         }
 
@@ -403,10 +398,6 @@ class NativeSessionStorage implements SessionStorageInterface
             throw new \InvalidArgumentException('Must be instance of AbstractProxy; implement \SessionHandlerInterface; or be null.');
         }
 
-        if (headers_sent($file, $line)) {
-            throw new \RuntimeException(sprintf('Failed to set the session handler because headers have already been sent by "%s" at line %d.', $file, $line));
-        }
-
         // Wrap $saveHandler in proxy and prevent double wrapping of proxy
         if (!$saveHandler instanceof AbstractProxy && $saveHandler instanceof \SessionHandlerInterface) {
             $saveHandler = new SessionHandlerProxy($saveHandler);
@@ -415,6 +406,10 @@ class NativeSessionStorage implements SessionStorageInterface
         }
         $this->saveHandler = $saveHandler;
 
+        if (headers_sent() || \PHP_SESSION_ACTIVE === session_status()) {
+            return;
+        }
+
         if ($this->saveHandler instanceof SessionHandlerProxy) {
             session_set_save_handler($this->saveHandler->getHandler(), false);
         } elseif ($this->saveHandler instanceof \SessionHandlerInterface) {

src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php

@@ -262,4 +262,16 @@ class NativeSessionStorageTest extends TestCase
         // Assert no exception has been thrown by `getStorage()`
         $this->addToAssertionCount(1);
     }
+
+    public function testGetBagsOnceSessionStartedIsIgnored()
+    {
+        session_start();
+        $bag = new AttributeBag();
+        $bag->setName('flashes');
+
+        $storage = $this->getStorage();
+        $storage->registerBag($bag);
+
+        $this->assertEquals($storage->getBag('flashes'), $bag);
+    }
 }

src/Symfony/Component/Process/Tests/ProcessTest.php

@@ -1263,13 +1263,9 @@ class ProcessTest extends TestCase
 
     public function testSimpleInputStream()
     {
-        if (\PHP_VERSION_ID === 70200 && \PHP_EXTRA_VERSION === 'RC6') {
-            $this->markTestSkipped('See bug #75515 in PHP 7.2RC6.');
-        }
-
         $input = new InputStream();
 
-        $process = $this->getProcessForCode('echo \'ping\'; stream_copy_to_stream(STDIN, STDOUT);');
+        $process = $this->getProcessForCode('echo \'ping\'; echo fread(STDIN, 4); echo fread(STDIN, 4);');
         $process->setInput($input);
 
         $process->start(function ($type, $data) use ($input) {