Merge branch '3.0' into 3.1

* 3.0:
  `@throws` annotations should go after `@return`
  Fix merge
  updated VERSION for 2.3.42
  update CONTRIBUTORS for 2.3.42
  updated CHANGELOG for 2.3.42
  Revert "bug #18908 [DependencyInjection] force enabling the external XML entity loaders (xabbuh)"
  Partial revert of previous PR
  [DependencyInjection] Skip deep reference check for 'service_container'
  Catch \Throwable
  [Serializer] Add missing @throws annotations
  Fix for #18843
  force enabling the external XML entity loaders
  Removed UTC specification with timestamp

Conflicts:
	src/Symfony/Component/Yaml/Tests/InlineTest.php

Author: nicolas-grekas

Dumper/PhpDumper.php

@@ -1176,7 +1176,7 @@ private function hasReference($id, array $arguments, $deep = false, array &$visi
                     return true;
                 }
 
-                if ($deep && !isset($visited[$argumentId])) {
+                if ($deep && !isset($visited[$argumentId]) && 'service_container' !== $argumentId) {
                     $visited[$argumentId] = true;
 
                     $service = $this->container->getDefinition($argumentId);

Tests/Dumper/PhpDumperTest.php

@@ -284,4 +284,15 @@ public function testDumpAutowireData()
 
         $this->assertEquals(file_get_contents(self::$fixturesPath.'/php/services24.php'), $dumper->dump());
     }
+
+    public function testInlinedDefinitionReferencingServiceContainer()
+    {
+        $container = new ContainerBuilder();
+        $container->register('foo', 'stdClass')->addMethodCall('add', array(new Reference('service_container')))->setPublic(false);
+        $container->register('bar', 'stdClass')->addArgument(new Reference('foo'));
+        $container->compile();
+
+        $dumper = new PhpDumper($container);
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services13.php', $dumper->dump(), '->dump() dumps inline definitions which reference service_container');
+    }
 }

Tests/Fixtures/php/services13.php

@@ -0,0 +1,57 @@
+<?php
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
+
+/**
+ * ProjectServiceContainer.
+ *
+ * This class has been auto-generated
+ * by the Symfony Dependency Injection Component.
+ */
+class ProjectServiceContainer extends Container
+{
+    private $parameters;
+    private $targetDirs = array();
+
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        $this->services = array();
+        $this->methodMap = array(
+            'bar' => 'getBarService',
+        );
+
+        $this->aliases = array();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compile()
+    {
+        throw new LogicException('You cannot compile a dumped frozen container.');
+    }
+
+    /**
+     * Gets the 'bar' service.
+     *
+     * This service is shared.
+     * This method always returns the same instance of the service.
+     *
+     * @return \stdClass A stdClass instance.
+     */
+    protected function getBarService()
+    {
+        $a = new \stdClass();
+        $a->add($this);
+
+        return $this->services['bar'] = new \stdClass($a);
+    }
+}