diff --git a/CHANGELOG-2.3.md b/CHANGELOG-2.3.md
index 1d8ff9479e..2758f011f3 100644
--- a/CHANGELOG-2.3.md
+++ b/CHANGELOG-2.3.md
@@ -7,6 +7,22 @@ in 2.3 minor versions.
 To get the diff for a specific change, go to https://github.com/symfony/symfony/commit/XXX where XXX is the change hash
 To get the diff between two versions, go to https://github.com/symfony/symfony/compare/v2.3.0...v2.3.1
 
+* 2.3.42 (2016-05-30)
+
+ * bug #18908 [DependencyInjection] force enabling the external XML entity loaders (xabbuh)
+ * bug #18893 [DependencyInjection] Skip deep reference check for 'service_container' (RobertMe)
+ * bug #18812 Catch \Throwable (fprochazka)
+ * bug #18821 [Form] Removed UTC specification with timestamp (francisbesset)
+ * bug #18861 Fix for #18843 (inso)
+ * bug #18907 [Routing] Fix the annotation loader taking a class constant as a beginning of a class name (jakzal, nicolas-grekas)
+ * bug #18864 [Console][DX] Fixed ambiguous error message when using a duplicate option shortcut (peterrehm)
+ * bug #18844 [Yaml] fix exception contexts (xabbuh)
+ * bug #18840 [Yaml] properly handle unindented collections (xabbuh)
+ * bug #18839 People - person singularization (Keeo)
+ * bug #18828 [Yaml] chomp newlines only at the end of YAML documents (xabbuh)
+ * bug #18635 [Console] Prevent fatal error when calling Command::getHelper without helperSet (chalasr)
+ * bug #18761  [Form] Modified iterator_to_array's 2nd parameter to false in ViolationMapper (issei-m)
+
 * 2.3.41 (2016-05-09)
 
  * security #18733 limited the maximum length of a submitted username (fabpot)
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index d8e08d8711..94711183ff 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -23,8 +23,8 @@ Symfony is the result of the work of many people who made the code better
  - Pascal Borreli (pborreli)
  - Joseph Bielawski (stloyd)
  - Wouter De Jong (wouterj)
- - Karma Dordrak (drak)
  - Romain Neutron (romain)
+ - Karma Dordrak (drak)
  - Lukas Kahwe Smith (lsmith)
  - Martin Hasoň (hason)
  - Jeremy Mikola (jmikola)
@@ -53,11 +53,11 @@ Symfony is the result of the work of many people who made the code better
  - Bilal Amarni (bamarni)
  - Florin Patan (florinpatan)
  - Kevin Bond (kbond)
+ - Peter Rehm (rpet)
  - Gábor Egyed (1ed)
  - Michel Weimerskirch (mweimerskirch)
  - Eric Clemmons (ericclemmons)
  - Andrej Hudec (pulzarraider)
- - Peter Rehm (rpet)
  - Christian Raue
  - Matthias Pigulla (mpdude)
  - Deni
@@ -67,6 +67,7 @@ Symfony is the result of the work of many people who made the code better
  - Iltar van der Berg (kjarli)
  - Ener-Getick (energetick)
  - Douglas Greenshields (shieldo)
+ - Charles Sarrazin (csarrazi)
  - Lee McDermott
  - Brandon Turner
  - Luis Cordova (cordoval)
@@ -74,7 +75,6 @@ Symfony is the result of the work of many people who made the code better
  - Pierre du Plessis (pierredup)
  - Bart van den Burg (burgov)
  - Jordan Alliot (jalliot)
- - Charles Sarrazin (csarrazi)
  - John Wards (johnwards)
  - Toni Uebernickel (havvg)
  - Fran Moreno (franmomu)
@@ -89,6 +89,7 @@ Symfony is the result of the work of many people who made the code better
  - Alexander M. Turek (derrabus)
  - Dariusz Ruminski
  - marc.weistroff
+ - Issei Murasawa (issei_m)
  - lenar
  - Włodzimierz Gajda (gajdaw)
  - Alexander Schwenn (xelaris)
@@ -97,13 +98,12 @@ Symfony is the result of the work of many people who made the code better
  - Colin Frei
  - Adrien Brault (adrienbrault)
  - Joshua Thijssen
- - Issei Murasawa (issei_m)
+ - Baptiste Clavié (talus)
  - Peter Kokot (maastermedia)
  - excelwebzone
  - Jacob Dreesen (jdreesen)
  - Jérémy DERUSSÉ (jderusse)
  - Vladimir Reznichenko (kalessil)
- - Baptiste Clavié (talus)
  - Fabien Pennequin (fabienpennequin)
  - Gordon Franke (gimler)
  - David Buchmann (dbu)
@@ -121,6 +121,7 @@ Symfony is the result of the work of many people who made the code better
  - Evgeniy (ewgraf)
  - Guilherme Blanco (guilhermeblanco)
  - Pablo Godel (pgodel)
+ - Titouan Galopin (tgalopin)
  - Jérémie Augustin (jaugustin)
  - Sebastiaan Stok (sstok)
  - Tugdual Saunier (tucksaun)
@@ -129,10 +130,10 @@ Symfony is the result of the work of many people who made the code better
  - Arnaud Kleinpeter (nanocom)
  - Joel Wurtz (brouznouf)
  - Philipp Wahala (hifi)
- - Titouan Galopin (tgalopin)
  - Richard Shank (iampersistent)
  - Thomas Rabaix (rande)
  - Vincent AUBERT (vincent)
+ - Rouven Weßling (realityking)
  - Mikael Pajunen
  - Clemens Tolboom
  - Helmer Aaviksoo
@@ -143,7 +144,6 @@ Symfony is the result of the work of many people who made the code better
  - Amal Raghav (kertz)
  - Jonathan Ingram (jonathaningram)
  - Artur Kotyrba
- - Rouven Weßling (realityking)
  - Warnar Boekkooi (boekkooi)
  - Dmitrii Chekaliuk (lazyhammer)
  - Clément JOBEILI (dator)
@@ -211,6 +211,7 @@ Symfony is the result of the work of many people who made the code better
  - Kristen Gilden (kgilden)
  - Dawid Nowak
  - Pierre-Yves LEBECQ (pylebecq)
+ - Daniel Espendiller
  - Jakub Kucharovic (jkucharovic)
  - Eugene Leonovich (rybakit)
  - Filippo Tessarotto
@@ -240,7 +241,6 @@ Symfony is the result of the work of many people who made the code better
  - Michael Holm (hollo)
  - Marc Weistroff (futurecat)
  - Hidde Wieringa (hiddewie)
- - Daniel Espendiller
  - Chris Smith (cs278)
  - Florian Klein (docteurklein)
  - Manuel Kiessling (manuelkiessling)
@@ -293,6 +293,7 @@ Symfony is the result of the work of many people who made the code better
  - Inal DJAFAR (inalgnu)
  - Christian Gärtner (dagardner)
  - Tomasz Kowalczyk (thunderer)
+ - Christian Schmidt
  - François-Xavier de Guillebon (de-gui_f)
  - Damien Alexandre (damienalexandre)
  - Felix Labrecque
@@ -309,6 +310,7 @@ Symfony is the result of the work of many people who made the code better
  - Philipp Kräutli (pkraeutli)
  - Kirill chEbba Chebunin (chebba)
  - Greg Thornton (xdissent)
+ - Robin Chalas (chalas_r)
  - Costin Bereveanu (schniper)
  - Loïc Chardonnet (gnusat)
  - Marek Kalnik (marekkalnik)
@@ -319,12 +321,14 @@ Symfony is the result of the work of many people who made the code better
  - Pavel Volokitin (pvolok)
  - Endre Fejes
  - Tobias Naumann (tna)
+ - Daniel Beyer
  - Shein Alexey
  - Baptiste Lafontaine
  - Joe Lencioni
  - Daniel Tschinder
  - Kai
  - Lee Rowlands
+ - Krzysztof Piasecki (krzysztek)
  - Maximilian Reichel (phramz)
  - Loick Piera (pyrech)
  - Karoly Negyesi (chx)
@@ -364,7 +368,6 @@ Symfony is the result of the work of many people who made the code better
  - EdgarPE
  - Florian Pfitzer (marmelatze)
  - Asier Illarramendi (doup)
- - Christian Schmidt
  - Chris Sedlmayr (catchamonkey)
  - Seb Koelen
  - Christoph Mewes (xrstf)
@@ -382,6 +385,7 @@ Symfony is the result of the work of many people who made the code better
  - Mathieu Lemoine
  - franek (franek)
  - Christian Wahler
+ - Mathieu Lemoine
  - Gintautas Miselis
  - Zander Baldwin
  - Adam Harvey
@@ -419,7 +423,6 @@ Symfony is the result of the work of many people who made the code better
  - Anthony Ferrara
  - Ioan Negulescu
  - Jakub Škvára (jskvara)
- - Daniel Beyer
  - Andrew Udvare (audvare)
  - alexpods
  - Tristan Darricau (nicofuma)
@@ -448,6 +451,7 @@ Symfony is the result of the work of many people who made the code better
  - Denis Gorbachev (starfall)
  - Peter van Dommelen
  - Tim van Densen
+ - Martin Morávek (keeo)
  - Steven Surowiec
  - Kevin Saliou (kbsali)
  - NothingWeAre
@@ -462,7 +466,6 @@ Symfony is the result of the work of many people who made the code better
  - Ziumin
  - Jeremy Benoist
  - Lenar Lõhmus
- - Krzysztof Piasecki (krzysztek)
  - Benjamin Laugueux (yzalis)
  - Zach Badgett (zachbadgett)
  - Aurélien Fredouelle
@@ -501,6 +504,7 @@ Symfony is the result of the work of many people who made the code better
  - Javier López (loalf)
  - Reinier Kip
  - Dustin Dobervich (dustin10)
+ - dantleech
  - Anne-Sophie Bachelard (annesophie)
  - Sebastian Marek (proofek)
  - Erkhembayar Gantulga (erheme318)
@@ -563,6 +567,7 @@ Symfony is the result of the work of many people who made the code better
  - Peter Ward
  - Dominik Ritter (dritter)
  - Sebastian Grodzicki (sgrodzicki)
+ - SpacePossum
  - Martin Hujer (martinhujer)
  - Pascal Helfenstein
  - Baldur Rensch (brensch)
@@ -613,6 +618,7 @@ Symfony is the result of the work of many people who made the code better
  - Adrien Lucas (adrienlucas)
  - James Michael DuPont
  - Tom Klingenberg
+ - Filip Procházka (fprochazka)
  - Christopher Hall (mythmakr)
  - Paul Kamer (pkamer)
  - Rafał Wrzeszcz (rafalwrzeszcz)
@@ -629,6 +635,7 @@ Symfony is the result of the work of many people who made the code better
  - Alaattin Kahramanlar (alaattin)
  - Maksim Kotlyar (makasim)
  - Neil Ferreira
+ - Nathanael Noblet (gnat)
  - Dmitry Parnas (parnas)
  - Théo FIDRY (theofidry)
  - Paul LE CORRE
@@ -745,7 +752,6 @@ Symfony is the result of the work of many people who made the code better
  - Guillaume Royer
  - Artem (digi)
  - boite
- - dantleech
  - Vadim Tyukov (vatson)
  - Sortex
  - chispita
@@ -851,6 +857,7 @@ Symfony is the result of the work of many people who made the code better
  - Christian Sciberras
  - Anton Bakai
  - Clement Herreman (clemherreman)
+ - Dan Ionut Dumitriu (danionut90)
  - Nyro (nyro)
  - Marco
  - Marc Torres
@@ -870,7 +877,6 @@ Symfony is the result of the work of many people who made the code better
  - ConneXNL
  - Aharon Perkel
  - Abdul.Mohsen B. A. A
- - SpacePossum
  - Benoît Burnichon
  - Remi Collet
  - pthompson
@@ -1059,6 +1065,7 @@ Symfony is the result of the work of many people who made the code better
  - stloyd
  - Chris Tickner
  - Andrew Coulton
+ - Jeremy Benoist
  - Michal Gebauer
  - Gleb Sidora
  - David Stone
@@ -1108,7 +1115,6 @@ Symfony is the result of the work of many people who made the code better
  - Simon Sargeant
  - efeen
  - Michał Dąbrowski (defrag)
- - Nathanael Noblet (gnat)
  - Simone Fumagalli (hpatoio)
  - Brian Graham (incognito)
  - Kevin Vergauwen (innocenzo)
@@ -1214,8 +1220,10 @@ Symfony is the result of the work of many people who made the code better
  - Alan Chen
  - Maerlyn
  - Even André Fiskvik
+ - Erik van Wingerden
  - Dane Powell
  - Gerrit Drost
+ - Linnaea Von Lavia
  - Lenar Lõhmus
  - Cristian Gonzalez
  - AlberT
@@ -1271,6 +1279,7 @@ Symfony is the result of the work of many people who made the code better
  - Joseph Deray
  - Damian Sromek
  - Ben
+ - dasmfm
  - Arnaud Buathier (arnapou)
  - chesteroni (chesteroni)
  - Mauricio Lopez (diaspar)
@@ -1358,7 +1367,6 @@ Symfony is the result of the work of many people who made the code better
  - Norman Soetbeer
  - zorn
  - Benjamin Long
- - Robin Chalas
  - Matt Janssen
  - Peter Gribanov
  - kwiateusz
@@ -1443,6 +1451,7 @@ Symfony is the result of the work of many people who made the code better
  - ollie harridge (ollietb)
  - Paul Andrieux (paulandrieux)
  - Paweł Szczepanek (pauluz)
+ - Philippe Degeeter (pdegeeter)
  - Christian López Espínola (penyaskito)
  - Petr Jaroš (petajaros)
  - Philipp Hoffmann (philipphoffmann)
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
index b37bee83d4..801149372a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
@@ -77,6 +77,9 @@ class DelegatingLoader extends BaseDelegatingLoader
         } catch (\Exception $e) {
             $this->loading = false;
             throw $e;
+        } catch (\Throwable $e) {
+            $this->loading = false;
+            throw $e;
         }
 
         $this->loading = false;
@@ -85,7 +88,7 @@ class DelegatingLoader extends BaseDelegatingLoader
             if ($controller = $route->getDefault('_controller')) {
                 try {
                     $controller = $this->parser->parse($controller);
-                } catch (\Exception $e) {
+                } catch (\InvalidArgumentException $e) {
                     // unable to optimize unknown notation
                 }
 
diff --git a/src/Symfony/Component/Config/Loader/FileLoader.php b/src/Symfony/Component/Config/Loader/FileLoader.php
index 88ec070f17..2b19b52584 100644
--- a/src/Symfony/Component/Config/Loader/FileLoader.php
+++ b/src/Symfony/Component/Config/Loader/FileLoader.php
@@ -113,6 +113,9 @@ abstract class FileLoader extends Loader
             } catch (\Exception $e) {
                 unset(self::$loading[$resource]);
                 throw $e;
+            } catch (\Throwable $e) {
+                unset(self::$loading[$resource]);
+                throw $e;
             }
 
             unset(self::$loading[$resource]);
diff --git a/src/Symfony/Component/DependencyInjection/Container.php b/src/Symfony/Component/DependencyInjection/Container.php
index 553f9120e1..3ecf81635a 100644
--- a/src/Symfony/Component/DependencyInjection/Container.php
+++ b/src/Symfony/Component/DependencyInjection/Container.php
@@ -313,6 +313,11 @@ class Container implements IntrospectableContainerInterface
                     return;
                 }
 
+                throw $e;
+            } catch (\Throwable $e) {
+                unset($this->loading[$id]);
+                unset($this->services[$id]);
+
                 throw $e;
             }
 
diff --git a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
index 15284a9050..b2e9784181 100644
--- a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
+++ b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
@@ -461,6 +461,10 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
                 return;
             }
 
+            throw $e;
+        } catch (\Throwable $e) {
+            unset($this->loading[$id]);
+
             throw $e;
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index 1c2efe5874..de8c4dae42 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -1268,7 +1268,7 @@ EOF;
                     return true;
                 }
 
-                if ($deep && !isset($visited[$argumentId])) {
+                if ($deep && !isset($visited[$argumentId]) && 'service_container' !== (string) $argument) {
                     $visited[$argumentId] = true;
 
                     $service = $this->container->getDefinition($argumentId);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index afe2f10ff5..562b94e21e 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -256,4 +256,15 @@ class PhpDumperTest extends \PHPUnit_Framework_TestCase
         $dumper = new PhpDumper($container);
         $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');
+    }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services13.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services13.php
new file mode 100644
index 0000000000..0c33b7b3ea
--- /dev/null
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services13.php
@@ -0,0 +1,54 @@
+<?php
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\InactiveScopeException;
+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 =
+        $this->scopedServices =
+        $this->scopeStacks = array();
+        $this->scopes = array();
+        $this->scopeChildren = array();
+        $this->methodMap = array(
+            'bar' => 'getBarService',
+        );
+
+        $this->aliases = array();
+    }
+
+    /**
+     * 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);
+    }
+}
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php
index b38680a1bb..5418f7feae 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php
@@ -126,7 +126,7 @@ class DateTimeToLocalizedStringTransformer extends BaseDateTimeTransformer
 
         try {
             // read timestamp into DateTime object - the formatter delivers in UTC
-            $dateTime = new \DateTime(sprintf('@%s UTC', $timestamp));
+            $dateTime = new \DateTime(sprintf('@%s', $timestamp));
         } catch (\Exception $e) {
             throw new TransformationFailedException($e->getMessage(), $e->getCode(), $e);
         }
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php b/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php
index 97aa740962..4b3e218b85 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php
@@ -71,6 +71,11 @@ class ContainerAwareHttpKernel extends HttpKernel
             $this->container->set('request', null, 'request');
             $this->container->leaveScope('request');
 
+            throw $e;
+        } catch (\Throwable $e) {
+            $this->container->set('request', null, 'request');
+            $this->container->leaveScope('request');
+
             throw $e;
         }
 
diff --git a/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php b/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
index f8f17b4f72..352ba584a7 100644
--- a/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
@@ -59,7 +59,7 @@ class ChainDecoder implements DecoderInterface
      *
      * @return DecoderInterface
      *
-     * @throws RuntimeException if no decoder is found
+     * @throws RuntimeException If no decoder is found.
      */
     private function getDecoder($format)
     {
diff --git a/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php b/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
index d1f09f6eaf..94cff517dc 100644
--- a/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
@@ -460,6 +460,8 @@ class XmlEncoder extends SerializerAwareEncoder implements EncoderInterface, Dec
      * @param \DOMNode $node
      * @param mixed    $val
      *
+     * @throws UnexpectedValueException
+     * 
      * @return bool
      */
     private function selectNodeType(\DOMNode $node, $val)
diff --git a/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php b/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php
index 86c270299e..765a1c6567 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Serializer\Normalizer;
 
+use Symfony\Component\Serializer\Exception\Exception;
+
 /**
  * Defines the most basic interface a class must implement to be denormalizable.
  *
@@ -33,6 +35,10 @@ interface DenormalizableInterface
      * @param string|null           $format       The format is optionally given to be able to denormalize differently
      *                                            based on different input formats
      * @param array                 $context      options for denormalizing
+     *
+     * @return object
+     *
+     * @throws Exception
      */
     public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = array());
 }
diff --git a/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php b/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
index 8b6c233395..40c5890bd3 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Serializer\Normalizer;
 
+use Symfony\Component\Serializer\Exception\Exception;
+
 /**
  * Defines the interface of denormalizers.
  *
@@ -26,6 +28,8 @@ interface DenormalizerInterface
      * @param string $format  format the given data was extracted from
      * @param array  $context options available to the denormalizer
      *
+     * @throws Exception
+     *                    
      * @return object
      */
     public function denormalize($data, $class, $format = null, array $context = array());
diff --git a/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php b/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php
index b9fefe887a..b4718cd482 100644
--- a/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Serializer\Normalizer;
 
+use Symfony\Component\Serializer\Exception\Exception;
+
 /**
  * Defines the most basic interface a class must implement to be normalizable.
  *
@@ -33,6 +35,8 @@ interface NormalizableInterface
      *                                        based on different output formats.
      * @param array               $context    Options for normalizing this object
      *
+     * @throws Exception
+     *                                           
      * @return array|string|bool|int|float|null
      */
     public function normalize(NormalizerInterface $normalizer, $format = null, array $context = array());
diff --git a/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php b/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
index 2a51d631b1..0ce5b3aef2 100644
--- a/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Serializer\Normalizer;
 
+use Symfony\Component\Serializer\Exception\Exception;
+
 /**
  * Defines the interface of normalizers.
  *
@@ -25,6 +27,8 @@ interface NormalizerInterface
      * @param string $format  format the normalization result will be encoded as
      * @param array  $context Context options for the normalizer
      *
+     * @throws Exception
+     *                                           
      * @return array|string|bool|int|float|null
      */
     public function normalize($object, $format = null, array $context = array());
diff --git a/src/Symfony/Component/Serializer/Serializer.php b/src/Symfony/Component/Serializer/Serializer.php
index 0259bfeda6..d95873800e 100644
--- a/src/Symfony/Component/Serializer/Serializer.php
+++ b/src/Symfony/Component/Serializer/Serializer.php
@@ -183,6 +183,8 @@ class Serializer implements SerializerInterface, NormalizerInterface, Denormaliz
      * @param string $format format name, present to give the option to normalizers to act differently based on formats
      *
      * @return NormalizerInterface|null
+     *
+     * @throws RuntimeException
      */
     private function getNormalizer($data, $format)
     {
@@ -201,6 +203,8 @@ class Serializer implements SerializerInterface, NormalizerInterface, Denormaliz
      * @param string $format format name, present to give the option to normalizers to act differently based on formats
      *
      * @return DenormalizerInterface|null
+     *
+     * @throws RuntimeException
      */
     private function getDenormalizer($data, $class, $format)
     {
diff --git a/src/Symfony/Component/Serializer/SerializerInterface.php b/src/Symfony/Component/Serializer/SerializerInterface.php
index c79db91892..ed2e71c2cd 100644
--- a/src/Symfony/Component/Serializer/SerializerInterface.php
+++ b/src/Symfony/Component/Serializer/SerializerInterface.php
@@ -11,6 +11,8 @@
 
 namespace Symfony\Component\Serializer;
 
+use Symfony\Component\Serializer\Exception\Exception;
+
 /**
  * Defines the interface of the Serializer.
  *
@@ -25,6 +27,8 @@ interface SerializerInterface
      * @param string $format  format name
      * @param array  $context options normalizers/encoders have access to
      *
+     * @throws Exception
+     *                    
      * @return string
      */
     public function serialize($data, $format, array $context = array());
@@ -37,6 +41,8 @@ interface SerializerInterface
      * @param string $format
      * @param array  $context
      *
+     * @throws Exception
+     * 
      * @return object
      */
     public function deserialize($data, $type, $format, array $context = array());
diff --git a/src/Symfony/Component/Yaml/Dumper.php b/src/Symfony/Component/Yaml/Dumper.php
index 21351a5c34..9bd9389c07 100644
--- a/src/Symfony/Component/Yaml/Dumper.php
+++ b/src/Symfony/Component/Yaml/Dumper.php
@@ -58,7 +58,7 @@ class Dumper
         if ($inline <= 0 || !is_array($input) || empty($input)) {
             $output .= $prefix.Inline::dump($input, $exceptionOnInvalidType, $objectSupport);
         } else {
-            $isAHash = array_keys($input) !== range(0, count($input) - 1);
+            $isAHash = Inline::isHash($input);
 
             foreach ($input as $key => $value) {
                 $willBeInlined = $inline - 1 <= 0 || !is_array($value) || empty($value);
diff --git a/src/Symfony/Component/Yaml/Inline.php b/src/Symfony/Component/Yaml/Inline.php
index fdd82d91f0..125def97fb 100644
--- a/src/Symfony/Component/Yaml/Inline.php
+++ b/src/Symfony/Component/Yaml/Inline.php
@@ -157,6 +157,28 @@ class Inline
         }
     }
 
+    /**
+     * Check if given array is hash or just normal indexed array.
+     *
+     * @internal
+     *
+     * @param array $value The PHP array to check
+     *
+     * @return bool true if value is hash array, false otherwise
+     */
+    public static function isHash(array $value)
+    {
+        $expectedKey = 0;
+
+        foreach ($value as $key => $val) {
+            if ($key !== $expectedKey++) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Dumps a PHP array to a YAML string.
      *
@@ -169,11 +191,7 @@ class Inline
     private static function dumpArray($value, $exceptionOnInvalidType, $objectSupport)
     {
         // array
-        $keys = array_keys($value);
-        $keysCount = count($keys);
-        if ((1 === $keysCount && '0' == $keys[0])
-            || ($keysCount > 1 && array_reduce($keys, function ($v, $w) { return (int) $v + $w; }, 0) === $keysCount * ($keysCount - 1) / 2)
-        ) {
+        if ($value && !self::isHash($value)) {
             $output = array();
             foreach ($value as $val) {
                 $output[] = self::dump($val, $exceptionOnInvalidType, $objectSupport);
@@ -182,7 +200,7 @@ class Inline
             return sprintf('[%s]', implode(', ', $output));
         }
 
-        // mapping
+        // hash
         $output = array();
         foreach ($value as $key => $val) {
             $output[] = sprintf('%s: %s', self::dump($key, $exceptionOnInvalidType, $objectSupport), self::dump($val, $exceptionOnInvalidType, $objectSupport));
diff --git a/src/Symfony/Component/Yaml/Tests/InlineTest.php b/src/Symfony/Component/Yaml/Tests/InlineTest.php
index d368ab5f59..1fbd62f56e 100644
--- a/src/Symfony/Component/Yaml/Tests/InlineTest.php
+++ b/src/Symfony/Component/Yaml/Tests/InlineTest.php
@@ -173,6 +173,24 @@ class InlineTest extends \PHPUnit_Framework_TestCase
         Inline::parse('{ foo: * #foo }');
     }
 
+    /**
+     * @dataProvider getDataForIsHash
+     */
+    public function testIsHash($array, $expected)
+    {
+        $this->assertSame($expected, Inline::isHash($array));
+    }
+
+    public function getDataForIsHash()
+    {
+        return array(
+            array(array(), false),
+            array(array(1, 2, 3), false),
+            array(array(2 => 1, 1 => 2, 0 => 3), true),
+            array(array('foo' => 1, 'bar' => 2), true),
+        );
+    }
+
     public function getTestsForParse()
     {
         return array(
@@ -379,6 +397,10 @@ class InlineTest extends \PHPUnit_Framework_TestCase
             array('[foo, { bar: foo, foo: [foo, { bar: foo }] }, [foo, { bar: foo }]]', array('foo', array('bar' => 'foo', 'foo' => array('foo', array('bar' => 'foo'))), array('foo', array('bar' => 'foo')))),
 
             array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
+
+            array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
+
+            array('{ foo: { bar: { 1: 2, baz: 3 } } }', array('foo' => array('bar' => array(1 => 2, 'baz' => 3)))),
         );
     }
 }