diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index b6f39741d9dbc..ac82d7063d015 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -1,6 +1,6 @@
 | Q             | A
 | ------------- | ---
-| Branch?       | master for features / 2.8 up to 4.1 for bug fixes <!-- see below -->
+| Branch?       | master for features / 3.4 up to 4.2 for bug fixes <!-- see below -->
 | Bug fix?      | yes/no
 | New feature?  | yes/no <!-- don't forget to update src/**/CHANGELOG.md files -->
 | BC breaks?    | no     <!-- see https://symfony.com/bc -->
diff --git a/.travis.yml b/.travis.yml
index 8f41396041a90..03984af88795d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -181,7 +181,7 @@ before_install:
               fi
 
               tfold ext.apcu tpecl apcu-5.1.6 apcu.so $INI
-              tfold ext.mongodb tpecl mongodb-1.5.2 mongodb.so $INI
+              tfold ext.mongodb tpecl mongodb-1.6.0alpha1 mongodb.so $INI
           fi
       done
 
@@ -247,7 +247,7 @@ install:
           fi
           phpenv global ${PHP/hhvm*/hhvm}
           if [[ $PHP = 7.* ]]; then
-              ([[ $deps ]] && cd src/Symfony/Component/HttpFoundation; composer config platform.ext-mongodb 1.5.2; composer require --dev --no-update mongodb/mongodb)
+              ([[ $deps ]] && cd src/Symfony/Component/HttpFoundation; composer config platform.ext-mongodb 1.6.0; composer require --dev --no-update mongodb/mongodb)
           fi
           tfold 'composer update' $COMPOSER_UP
           if [[ $TRAVIS_PHP_VERSION = 5.* || $TRAVIS_PHP_VERSION = hhvm* ]]; then
diff --git a/CHANGELOG-3.4.md b/CHANGELOG-3.4.md
index dcd1c3bf06293..d0d11555c73ad 100644
--- a/CHANGELOG-3.4.md
+++ b/CHANGELOG-3.4.md
@@ -7,6 +7,23 @@ in 3.4 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/v3.4.0...v3.4.1
 
+* 3.4.20 (2018-12-06)
+
+ * security #cve-2018-19790 [Security\Http] detect bad redirect targets using backslashes (xabbuh)
+ * security #cve-2018-19789 [Form] Filter file uploads out of regular form types (nicolas-grekas)
+ * bug #29436 [Cache] Fixed Memcached adapter doClear()to call flush() (raitocz)
+ * bug #29441 [Routing] ignore trailing slash for non-GET requests (nicolas-grekas)
+ * bug #29432 [DI] dont inline when lazy edges are found (nicolas-grekas)
+ * bug #29413 [Serializer] fixed DateTimeNormalizer to maintain microseconds when a different timezone required (rvitaliy)
+ * bug #29424 [Routing] fix taking verb into account when redirecting (nicolas-grekas)
+ * bug #29414 [DI] Fix dumping expressions accessing single-use private services (chalasr)
+ * bug #29375 [Validator] Allow `ConstraintViolation::__toString()` to expose codes that are not null or emtpy strings (phansys)
+ * bug #29376 [EventDispatcher] Fix eventListener wrapper loop in TraceableEventDispatcher (jderusse)
+ * bug #29343 [Form] Handle all case variants of "nan" when parsing a number (mwhudson, xabbuh)
+ * bug #29355 [PropertyAccess] calculate cache keys for property setters depending on the value (xabbuh)
+ * bug #29369 [DI] fix combinatorial explosion when analyzing the service graph (nicolas-grekas)
+ * bug #29349 [Debug] workaround opcache bug mutating "$this" !?! (nicolas-grekas)
+ 
 * 3.4.19 (2018-11-26)
 
  * bug #29318 [Console] Move back root exception to stack trace in verbose mode (chalasr)
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 969c6a424cefc..a6800f3acfb8b 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -14,15 +14,15 @@ Symfony is the result of the work of many people who made the code better
  - Victor Berchet (victor)
  - Robin Chalas (chalas_r)
  - Kévin Dunglas (dunglas)
+ - Maxime Steinhausser (ogizanagi)
  - Jakub Zalas (jakubzalas)
  - Johannes S (johannes)
- - Maxime Steinhausser (ogizanagi)
  - Kris Wallsmith (kriswallsmith)
  - Ryan Weaver (weaverryan)
  - Javier Eguiluz (javier.eguiluz)
  - Grégoire Pineau (lyrixx)
- - Hugo Hamon (hhamon)
  - Roland Franssen (ro0)
+ - Hugo Hamon (hhamon)
  - Abdellatif Ait boudad (aitboudad)
  - Romain Neutron (romain)
  - Pascal Borreli (pborreli)
@@ -37,8 +37,8 @@ Symfony is the result of the work of many people who made the code better
  - Benjamin Eberlei (beberlei)
  - Igor Wiedler (igorw)
  - Jules Pietri (heah)
- - Eriksen Costa (eriksencosta)
  - Yonel Ceruto (yonelceruto)
+ - Eriksen Costa (eriksencosta)
  - Guilhem Niot (energetick)
  - Sarah Khalil (saro0h)
  - Jonathan Wage (jwage)
@@ -56,12 +56,12 @@ Symfony is the result of the work of many people who made the code better
  - Bulat Shakirzyanov (avalanche123)
  - Matthias Pigulla (mpdude)
  - Peter Rehm (rpet)
+ - Jérémy DERUSSÉ (jderusse)
  - Saša Stamenković (umpirsky)
  - Pierre du Plessis (pierredup)
  - Kevin Bond (kbond)
  - Henrik Bjørnskov (henrikbjorn)
  - Miha Vrhovnik
- - Jérémy DERUSSÉ (jderusse)
  - Diego Saint Esteben (dii3g0)
  - Alexander M. Turek (derrabus)
  - Konstantin Kudryashov (everzet)
@@ -70,6 +70,7 @@ Symfony is the result of the work of many people who made the code better
  - Gábor Egyed (1ed)
  - Mathieu Piot (mpiot)
  - Titouan Galopin (tgalopin)
+ - Vladimir Reznichenko (kalessil)
  - Michel Weimerskirch (mweimerskirch)
  - Andrej Hudec (pulzarraider)
  - Konstantin Myakshin (koc)
@@ -77,7 +78,6 @@ Symfony is the result of the work of many people who made the code better
  - Jáchym Toušek (enumag)
  - Charles Sarrazin (csarrazi)
  - David Maicher (dmaicher)
- - Vladimir Reznichenko (kalessil)
  - Christian Raue
  - Issei Murasawa (issei_m)
  - Arnout Boks (aboks)
@@ -86,13 +86,13 @@ Symfony is the result of the work of many people who made the code better
  - Dariusz Górecki (canni)
  - Douglas Greenshields (shieldo)
  - Dariusz Ruminski
+ - Grégoire Paris (greg0ire)
  - Lee McDermott
  - Brandon Turner
  - Luis Cordova (cordoval)
  - Graham Campbell (graham)
  - Daniel Holmes (dholmes)
  - Toni Uebernickel (havvg)
- - Grégoire Paris (greg0ire)
  - Bart van den Burg (burgov)
  - Jordan Alliot (jalliot)
  - Jérôme Tamarelle (gromnan)
@@ -113,15 +113,17 @@ Symfony is the result of the work of many people who made the code better
  - lenar
  - Alexander Schwenn (xelaris)
  - Włodzimierz Gajda (gajdaw)
+ - Tomáš Votruba (tomas_votruba)
  - Peter Kokot (maastermedia)
  - Jacob Dreesen (jdreesen)
  - Florian Voutzinos (florianv)
  - Colin Frei
  - Adrien Brault (adrienbrault)
- - Tomáš Votruba (tomas_votruba)
  - Joshua Thijssen
  - excelwebzone
  - Gordon Franke (gimler)
+ - Chris Wilkinson (thewilkybarkid)
+ - Javier Spagnoletti (phansys)
  - Fabien Pennequin (fabienpennequin)
  - Eric GELOEN (gelo)
  - Sebastiaan Stok (sstok)
@@ -129,11 +131,9 @@ Symfony is the result of the work of many people who made the code better
  - Lars Strojny (lstrojny)
  - Daniel Wehner (dawehner)
  - Tugdual Saunier (tucksaun)
- - Javier Spagnoletti (phansys)
  - Théo FIDRY (theofidry)
  - Robert Schönthal (digitalkaoz)
  - Florian Lonqueu-Brochard (florianlb)
- - Chris Wilkinson (thewilkybarkid)
  - Stefano Sala (stefano.sala)
  - Evgeniy (ewgraf)
  - Alex Pott
@@ -165,6 +165,7 @@ Symfony is the result of the work of many people who made the code better
  - Rouven Weßling (realityking)
  - Clemens Tolboom
  - Helmer Aaviksoo
+ - Alessandro Chitolina (alekitto)
  - Hiromi Hishida (77web)
  - Niels Keurentjes (curry684)
  - Matthieu Ouellette-Vachon (maoueh)
@@ -179,8 +180,9 @@ Symfony is the result of the work of many people who made the code better
  - jeremyFreeAgent (Jérémy Romey) (jeremyfreeagent)
  - James Halsall (jaitsu)
  - Matthieu Napoli (mnapoli)
+ - Florent Mata (fmata)
  - Warnar Boekkooi (boekkooi)
- - Alessandro Chitolina (alekitto)
+ - Thomas Calvet (fancyweb)
  - Dmitrii Chekaliuk (lazyhammer)
  - Clément JOBEILI (dator)
  - Daniel Espendiller
@@ -193,9 +195,7 @@ Symfony is the result of the work of many people who made the code better
  - Dennis Benkert (denderello)
  - DQNEO
  - Benjamin Dulau (dbenjamin)
- - Florent Mata (fmata)
  - Mathieu Lemoine (lemoinem)
- - Thomas Calvet (fancyweb)
  - Christian Schmidt
  - Andreas Hucks (meandmymonkey)
  - Noel Guilbert (noel)
@@ -217,6 +217,7 @@ Symfony is the result of the work of many people who made the code better
  - Jeremy Livingston (jeremylivingston)
  - Michael Lee (zerustech)
  - Matthieu Auger (matthieuauger)
+ - Oskar Stark (oskarstark)
  - Leszek Prabucki (l3l0)
  - François Zaninotto (fzaninotto)
  - Dustin Whittle (dustinwhittle)
@@ -241,12 +242,12 @@ Symfony is the result of the work of many people who made the code better
  - Rob Frawley 2nd (robfrawley)
  - julien pauli (jpauli)
  - Lorenz Schori
- - Oskar Stark (oskarstark)
  - Sébastien Lavoie (lavoiesl)
  - Gregor Harlan (gharlan)
  - Dariusz
  - Francois Zaninotto
  - Alexander Kotynia (olden)
+ - Fabien Bourigault (fbourigault)
  - Daniel Tschinder
  - Christian Schmidt
  - Marcos Sánchez
@@ -258,6 +259,7 @@ Symfony is the result of the work of many people who made the code better
  - Benoît Burnichon (bburnichon)
  - Roman Marintšenko (inori)
  - Xavier Montaña Carreras (xmontana)
+ - François-Xavier de Guillebon (de-gui_f)
  - Mickaël Andrieu (mickaelandrieu)
  - Maxime Veber (nek-)
  - Xavier Perez
@@ -295,6 +297,7 @@ Symfony is the result of the work of many people who made the code better
  - mcfedr (mcfedr)
  - Colin O&#039;Dell (colinodell)
  - Giorgio Premi
+ - Jan Schädlich (jschaedl)
  - Beau Simensen (simensen)
  - Michael Hirschler (mvhirsch)
  - Robert Kiss (kepten)
@@ -305,8 +308,8 @@ Symfony is the result of the work of many people who made the code better
  - Jérôme Parmentier (lctrs)
  - Michael Babker (mbabker)
  - Peter Kruithof (pkruithof)
- - François-Xavier de Guillebon (de-gui_f)
  - Michael Holm (hollo)
+ - Remon van de Kamp (rpkamp)
  - Marc Weistroff (futurecat)
  - Christian Schmidt
  - MatTheCat
@@ -350,8 +353,6 @@ Symfony is the result of the work of many people who made the code better
  - Ricard Clau (ricardclau)
  - Mark Challoner (markchalloner)
  - Gennady Telegin (gtelegin)
- - Jan Schädlich (jschaedl)
- - Fabien Bourigault (fbourigault)
  - Ben Davies (bendavies)
  - Erin Millard
  - Artur Melo (restless)
@@ -445,6 +446,7 @@ Symfony is the result of the work of many people who made the code better
  - lancergr
  - Zan Baldwin
  - Mihai Stancu
+ - Ivan Nikolaev (destillat)
  - Olivier Dolbeau (odolbeau)
  - Jan Rosier (rosier)
  - Alessandro Lai (jean85)
@@ -461,7 +463,6 @@ Symfony is the result of the work of many people who made the code better
  - Boris Vujicic (boris.vujicic)
  - Chris Sedlmayr (catchamonkey)
  - Mateusz Sip (mateusz_sip)
- - Remon van de Kamp
  - Kamil Kokot (pamil)
  - Seb Koelen
  - Christoph Mewes (xrstf)
@@ -470,6 +471,7 @@ Symfony is the result of the work of many people who made the code better
  - Dirk Pahl (dirkaholic)
  - cedric lombardot (cedriclombardot)
  - Jonas Flodén (flojon)
+ - Gonzalo Vilaseca (gonzalovilaseca)
  - Marcin Sikoń (marphi)
  - Dominik Zogg (dominik.zogg)
  - Marek Pietrzak
@@ -569,6 +571,7 @@ Symfony is the result of the work of many people who made the code better
  - Marcin Chyłek (songoq)
  - Ben Scott
  - Ned Schwartz
+ - Samuel NELA (snela)
  - Ziumin
  - Jeremy Benoist
  - fritzmg
@@ -619,6 +622,7 @@ Symfony is the result of the work of many people who made the code better
  - Gunnstein Lye (glye)
  - Maxime Douailin
  - Jean Pasdeloup (pasdeloup)
+ - Sylvain Fabre (sylfabre)
  - Benjamin Cremer (bcremer)
  - Javier López (loalf)
  - Reinier Kip
@@ -643,7 +647,6 @@ Symfony is the result of the work of many people who made the code better
  - adev
  - Stefan Warman
  - Arkadius Stefanski (arkadius)
- - Gonzalo Vilaseca (gonzalovilaseca)
  - Tristan Maindron (tmaindron)
  - Wesley Lancel
  - Ke WANG (yktd26)
@@ -665,6 +668,7 @@ Symfony is the result of the work of many people who made the code better
  - Sergey (upyx)
  - Michael Devery (mickadoo)
  - Antoine Corcy
+ - Dmitrii Poddubnyi (karser)
  - Sascha Grossenbacher
  - Szijarto Tamas
  - Robin Lehrmann (robinlehrmann)
@@ -696,6 +700,7 @@ Symfony is the result of the work of many people who made the code better
  - Tiago Brito (blackmx)
  - 
  - Richard van den Brand (ricbra)
+ - Thomas Bisignani (toma)
  - develop
  - flip111
  - Greg Anderson
@@ -804,7 +809,6 @@ Symfony is the result of the work of many people who made the code better
  - Sofiane HADDAG (sofhad)
  - frost-nzcr4
  - Bozhidar Hristov
- - Ivan Nikolaev (destillat)
  - Laurent Bassin (lbassin)
  - andrey1s
  - Abhoryo
@@ -840,7 +844,6 @@ Symfony is the result of the work of many people who made the code better
  - Jörn Lang (j.lang)
  - Omar Yepez (oyepez003)
  - Gawain Lynch (gawain)
- - Samuel NELA (snela)
  - mwsaz
  - Jelle Kapitein
  - Benoît Bourgeois
@@ -861,6 +864,7 @@ Symfony is the result of the work of many people who made the code better
  - Christian Morgan
  - Alexander Miehe (engerim)
  - Morgan Auchede (mauchede)
+ - Sascha Dens (saschadens)
  - Don Pinkster
  - Maksim Muruev
  - Emil Einarsson
@@ -989,6 +993,7 @@ Symfony is the result of the work of many people who made the code better
  - Mathieu Santostefano
  - Arjan Keeman
  - Máximo Cuadros (mcuadros)
+ - Lukas Mencl
  - tamirvs
  - julien.galenski
  - Christian Neff
@@ -1032,6 +1037,7 @@ Symfony is the result of the work of many people who made the code better
  - Dominic Tubach
  - Nikita Konstantinov
  - Martijn Evers
+ - Vitaliy Ryaboy (vitaliy)
  - Benjamin Paap (benjaminpaap)
  - Christian
  - Denis Golubovskiy (bukashk0zzz)
@@ -1059,6 +1065,7 @@ Symfony is the result of the work of many people who made the code better
  - Jakub Sacha
  - Olaf Klischat
  - orlovv
+ - Claude Dioudonnat
  - Jonathan Hedstrom
  - Peter Smeets (darkspartan)
  - Jhonny Lidfors (jhonny)
@@ -1242,6 +1249,7 @@ Symfony is the result of the work of many people who made the code better
  - Sandro Hopf
  - Łukasz Makuch
  - George Giannoulopoulos
+ - Alexander Pasichnick
  - Luis Ramirez (luisdeimos)
  - Daniel Richter (richtermeister)
  - ChrisC
@@ -1290,6 +1298,7 @@ Symfony is the result of the work of many people who made the code better
  - Adrien Samson (adriensamson)
  - Samuel Gordalina (gordalina)
  - Max Romanovsky (maxromanovsky)
+ - Nicolas Eeckeloo (neeckeloo)
  - Mathieu Morlon
  - Daniel Tschinder
  - Arnaud CHASSEUX
@@ -1305,7 +1314,6 @@ Symfony is the result of the work of many people who made the code better
  - Jon Gotlin (jongotlin)
  - Michael Dowling (mtdowling)
  - Karlos Presumido (oneko)
- - Sylvain Fabre (sylfabre)
  - Thomas Counsell
  - BilgeXA
  - r1pp3rj4ck
@@ -1392,6 +1400,7 @@ Symfony is the result of the work of many people who made the code better
  - Alan Poulain
  - Martin Eckhardt
  - natechicago
+ - Sergei Gorjunov
  - Jonathan Poston
  - Adrian Olek (adrianolek)
  - Jody Mickey (jwmickey)
@@ -1448,6 +1457,7 @@ Symfony is the result of the work of many people who made the code better
  - Phobetor
  - Andreas
  - Markus
+ - Daniel Gorgan
  - Thomas Chmielowiec
  - shdev
  - Andrey Ryaguzov
@@ -1481,6 +1491,7 @@ Symfony is the result of the work of many people who made the code better
  - me_shaon
  - 蝦米
  - Grayson Koonce (breerly)
+ - Andrey Helldar (helldar)
  - Karim Cassam Chenaï (ka)
  - Maksym Slesarenko (maksym_slesarenko)
  - Michal Kurzeja (mkurzeja)
@@ -1499,6 +1510,7 @@ Symfony is the result of the work of many people who made the code better
  - David Barratt
  - Pavel.Batanov
  - avi123
+ - Pavel Prischepa
  - alsar
  - downace
  - Aarón Nieves Fernández
@@ -1606,6 +1618,7 @@ Symfony is the result of the work of many people who made the code better
  - Joel Marcey
  - David Christmann
  - root
+ - pf
  - Vincent Chalnot
  - James Hudson
  - Tom Maguire
@@ -1613,6 +1626,7 @@ Symfony is the result of the work of many people who made the code better
  - David Zuelke
  - Adrian
  - Oleg Andreyev
+ - neFAST
  - Pierre Rineau
  - Maxim Lovchikov
  - adenkejawen
@@ -1710,7 +1724,6 @@ Symfony is the result of the work of many people who made the code better
  - Giovanni Albero (johntree)
  - Jorge Martin (jorgemartind)
  - Joeri Verdeyen (jverdeyen)
- - Dmitrii Poddubnyi (karser)
  - Kevin Verschaeve (keversc)
  - Kevin Herrera (kherge)
  - Luis Ramón López López (lrlopez)
@@ -1748,6 +1761,7 @@ Symfony is the result of the work of many people who made the code better
  - Damian Sromek
  - Ben
  - Evgeniy Tetenchuk
+ - Shrey Puranik
  - dasmfm
  - Mathias Geat
  - Arnaud Buathier (arnapou)
@@ -1768,6 +1782,7 @@ Symfony is the result of the work of many people who made the code better
  - Ulf Reimers (ureimers)
  - Wotre
  - goohib
+ - Tom Counsell
  - Xavier HAUSHERR
  - Ron Gähler
  - Edwin Hageman
@@ -1805,6 +1820,7 @@ Symfony is the result of the work of many people who made the code better
  - Jörg Rühl
  - wesleyh
  - sergey
+ - Michael Hudson-Doyle
  - Daniel Bannert
  - Karim Miladi
  - Michael Genereux
@@ -1834,11 +1850,13 @@ Symfony is the result of the work of many people who made the code better
  - Kasperki
  - Tammy D
  - Daniel STANCU
+ - Ryan Rud
  - Ondrej Slinták
  - vlechemin
  - Brian Corrigan
  - Ladislav Tánczos
  - Skorney
+ - Lucas Matte
  - fmarchalemisys
  - mieszko4
  - Steve Preston
@@ -1872,6 +1890,7 @@ Symfony is the result of the work of many people who made the code better
  - zorn
  - Yuriy Potemkin
  - Emilie Lorenzo
+ - Edvin Hultberg
  - Benjamin Long
  - Matt Janssen
  - Ben Miller
@@ -1916,6 +1935,7 @@ Symfony is the result of the work of many people who made the code better
  - sualko
  - Bilge
  - ADmad
+ - Stéphane Delprat
  - Nicolas Roudaire
  - Alfonso (afgar)
  - Andreas Forsblom (aforsblo)
@@ -1992,11 +2012,11 @@ Symfony is the result of the work of many people who made the code better
  - Alex Carol (picard89)
  - Daniel Perez Pinazo (pitiflautico)
  - Phil Taylor (prazgod)
+ - Maxim Pustynnikov (pustynnikov)
  - Brayden Williams (redstar504)
  - Rich Sage (richsage)
  - Rokas Mikalkėnas (rokasm)
  - Bart Ruysseveldt (ruyss)
- - Sascha Dens (saschadens)
  - scourgen hung (scourgen)
  - Sebastian Busch (sebu)
  - Sepehr Lajevardi (sepehr)
diff --git a/phpunit b/phpunit
index f4b80ed064121..9975195309a81 100755
--- a/phpunit
+++ b/phpunit
@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/66ffffcd8a6bb23aec847c8bdfb918610399499a
+// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/2155067dfc73e0e77dbc26f236af17e4df552de5
 
 if (!file_exists(__DIR__.'/vendor/symfony/phpunit-bridge/bin/simple-phpunit')) {
     echo "Unable to find the `simple-phpunit` script in `vendor/symfony/phpunit-bridge/bin/`.\nPlease run `composer update` before running this command.\n";
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/form.html.twig b/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/form.html.twig
index 02b77319ac249..720da85750526 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/form.html.twig
+++ b/src/Symfony/Bundle/WebProfilerBundle/Resources/views/Collector/form.html.twig
@@ -177,6 +177,12 @@
             color: inherit;
             text-decoration: inherit;
         }
+        h2 + h3.form-data-type {
+            margin-top: 0;
+        }
+        h3.form-data-type + h3 {
+            margin-top: 1em;
+        }
     </style>
 {% endblock %}
 
@@ -455,9 +461,10 @@
 {% macro form_tree_details(name, data, forms_by_hash, show) %}
     {% import _self as tree %}
     <div class="tree-details{% if not show|default(false) %} hidden{% endif %}" {% if data.id is defined %}id="{{ data.id }}-details"{% endif %}>
-        <h2 class="dump-inline">
-            {{ name|default('(no name)') }} {% if data.type_class is defined %}({{ profiler_dump(data.type_class) }}){% endif %}
-        </h2>
+        <h2>{{ name|default('(no name)') }}</h2>
+        {% if data.type_class is defined %}
+            <h3 class="dump-inline form-data-type">{{ profiler_dump(data.type_class) }}</h3>
+        {% endif %}
 
         {% if data.errors is defined and data.errors|length > 0 %}
         <div class="errors">
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
index 59d28a33c1bea..1f2f4d40acfa0 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
@@ -192,4 +192,9 @@ public function provideDsnWithOptions()
             array(\Memcached::OPT_SOCKET_RECV_SIZE => 1, \Memcached::OPT_SOCKET_SEND_SIZE => 2, \Memcached::OPT_RETRY_TIMEOUT => 8),
         );
     }
+
+    public function testClear()
+    {
+        $this->assertTrue($this->createCachePool()->clear());
+    }
 }
diff --git a/src/Symfony/Component/Cache/Traits/MemcachedTrait.php b/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
index cf04f1cf85664..8160f14116162 100644
--- a/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
+++ b/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
@@ -260,7 +260,7 @@ protected function doDelete(array $ids)
      */
     protected function doClear($namespace)
     {
-        return false;
+        return '' === $namespace && $this->getClient()->flush();
     }
 
     private function checkResultCode($result)
diff --git a/src/Symfony/Component/Debug/DebugClassLoader.php b/src/Symfony/Component/Debug/DebugClassLoader.php
index c9fa76cfe7058..138b4d38d8fe1 100644
--- a/src/Symfony/Component/Debug/DebugClassLoader.php
+++ b/src/Symfony/Component/Debug/DebugClassLoader.php
@@ -138,14 +138,14 @@ public function loadClass($class)
         try {
             if ($this->isFinder && !isset($this->loaded[$class])) {
                 $this->loaded[$class] = true;
-                if ($file = $this->classLoader[0]->findFile($class) ?: false) {
-                    $wasCached = \function_exists('opcache_is_script_cached') && @opcache_is_script_cached($file);
-
+                if (!$file = $this->classLoader[0]->findFile($class) ?: false) {
+                    // no-op
+                } elseif (\function_exists('opcache_is_script_cached') && @opcache_is_script_cached($file)) {
                     require $file;
 
-                    if ($wasCached) {
-                        return;
-                    }
+                    return;
+                } else {
+                    require $file;
                 }
             } else {
                 \call_user_func($this->classLoader, $class);
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
index 05eb72d9746f4..a229022ed8a0b 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
@@ -127,13 +127,19 @@ private function isInlineableDefinition($id, Definition $definition, ServiceRefe
         }
 
         $ids = array();
+        $isReferencedByConstructor = false;
         foreach ($graph->getNode($id)->getInEdges() as $edge) {
-            if ($edge->isWeak()) {
+            $isReferencedByConstructor = $isReferencedByConstructor || $edge->isReferencedByConstructor();
+            if ($edge->isWeak() || $edge->isLazy()) {
                 return false;
             }
             $ids[] = $edge->getSourceNode()->getId();
         }
 
+        if (!$ids) {
+            return true;
+        }
+
         if (\count(array_unique($ids)) > 1) {
             return false;
         }
@@ -142,6 +148,10 @@ private function isInlineableDefinition($id, Definition $definition, ServiceRefe
             return false;
         }
 
-        return !$ids || $this->container->getDefinition($ids[0])->isShared();
+        if ($isReferencedByConstructor && $this->container->getDefinition($ids[0])->isLazy() && ($definition->getProperties() || $definition->getMethodCalls() || $definition->getConfigurator())) {
+            return false;
+        }
+
+        return $this->container->getDefinition($ids[0])->isShared();
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index fd7eec05759b7..3a3c24d0445bd 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -155,17 +155,18 @@ public function dump(array $options = array())
         }
 
         (new AnalyzeServiceReferencesPass(false, !$this->getProxyDumper() instanceof NullDumper))->process($this->container);
+        $checkedNodes = array();
         $this->circularReferences = array();
-        foreach (array(true, false) as $byConstructor) {
-            foreach ($this->container->getCompiler()->getServiceReferenceGraph()->getNodes() as $id => $node) {
-                if (!$node->getValue() instanceof Definition) {
-                    continue;
-                }
-                $currentPath = array($id => true);
-                $this->analyzeCircularReferences($node->getOutEdges(), $currentPath, $id, $byConstructor);
+        foreach ($this->container->getCompiler()->getServiceReferenceGraph()->getNodes() as $id => $node) {
+            if (!$node->getValue() instanceof Definition) {
+                continue;
+            }
+            if (!isset($checkedNodes[$id])) {
+                $this->analyzeCircularReferences($id, $node->getOutEdges(), $checkedNodes);
             }
         }
         $this->container->getCompiler()->getServiceReferenceGraph()->clear();
+        $checkedNodes = array();
 
         $this->docStar = $options['debug'] ? '*' : '';
 
@@ -301,12 +302,12 @@ private function getProxyDumper()
         return $this->proxyDumper;
     }
 
-    private function analyzeCircularReferences(array $edges, &$currentPath, $sourceId, $byConstructor)
+    private function analyzeCircularReferences($sourceId, array $edges, &$checkedNodes, &$currentPath = array())
     {
+        $checkedNodes[$sourceId] = true;
+        $currentPath[$sourceId] = $sourceId;
+
         foreach ($edges as $edge) {
-            if ($byConstructor && !$edge->isReferencedByConstructor()) {
-                continue;
-            }
             $node = $edge->getDestNode();
             $id = $node->getId();
 
@@ -315,20 +316,42 @@ private function analyzeCircularReferences(array $edges, &$currentPath, $sourceI
             } elseif (isset($currentPath[$id])) {
                 $currentId = $id;
                 foreach (array_reverse($currentPath) as $parentId) {
-                    if (!isset($this->circularReferences[$parentId][$currentId])) {
-                        $this->circularReferences[$parentId][$currentId] = $byConstructor;
+                    $this->circularReferences[$parentId][$currentId] = $currentId;
+                    if ($parentId === $id) {
+                        break;
                     }
+                    $currentId = $parentId;
+                }
+            } elseif (!isset($checkedNodes[$id])) {
+                $this->analyzeCircularReferences($id, $node->getOutEdges(), $checkedNodes, $currentPath);
+            } elseif (isset($this->circularReferences[$id])) {
+                $this->connectCircularReferences($id, $currentPath);
+            }
+        }
+        unset($currentPath[$sourceId]);
+    }
+
+    private function connectCircularReferences($sourceId, &$currentPath, &$subPath = array())
+    {
+        $subPath[$sourceId] = $sourceId;
+        $currentPath[$sourceId] = $sourceId;
+
+        foreach ($this->circularReferences[$sourceId] as $id) {
+            if (isset($currentPath[$id])) {
+                $currentId = $id;
+                foreach (array_reverse($currentPath) as $parentId) {
+                    $this->circularReferences[$parentId][$currentId] = $currentId;
                     if ($parentId === $id) {
                         break;
                     }
                     $currentId = $parentId;
                 }
-            } else {
-                $currentPath[$id] = $id;
-                $this->analyzeCircularReferences($node->getOutEdges(), $currentPath, $id, $byConstructor);
-                unset($currentPath[$id]);
+            } elseif (!isset($subPath[$id]) && isset($this->circularReferences[$id])) {
+                $this->connectCircularReferences($id, $currentPath, $subPath);
             }
         }
+        unset($currentPath[$sourceId]);
+        unset($subPath[$sourceId]);
     }
 
     private function collectLineage($class, array &$lineage)
@@ -569,7 +592,8 @@ private function addServiceConfigurator(Definition $definition, $variableName =
 
         if (\is_array($callable)) {
             if ($callable[0] instanceof Reference
-                || ($callable[0] instanceof Definition && $this->definitionVariables->contains($callable[0]))) {
+                || ($callable[0] instanceof Definition && $this->definitionVariables->contains($callable[0]))
+            ) {
                 return sprintf("        %s->%s(\$%s);\n", $this->dumpValue($callable[0]), $callable[1], $variableName);
             }
 
@@ -724,7 +748,7 @@ private function addInlineReference($id, Definition $definition, $targetId, $for
 
         $hasSelfRef = isset($this->circularReferences[$id][$targetId]);
         $forConstructor = $forConstructor && !isset($this->definitionVariables[$definition]);
-        $code = $hasSelfRef && $this->circularReferences[$id][$targetId] && !$forConstructor ? $this->addInlineService($id, $definition, $definition) : '';
+        $code = $hasSelfRef && !$forConstructor ? $this->addInlineService($id, $definition, $definition) : '';
 
         if (isset($this->referenceVariables[$targetId]) || (2 > $callCount && (!$hasSelfRef || !$forConstructor))) {
             return $code;
@@ -1798,6 +1822,7 @@ private function getServiceCall($id, Reference $reference = null)
                 if ($definition->isShared()) {
                     $code = sprintf('$this->services[\'%s\'] = %s', $id, $code);
                 }
+                $code = "($code)";
             } elseif ($this->asFiles && $definition->isShared() && !$this->isHotPath($definition)) {
                 $code = sprintf("\$this->load('%s.php')", $this->generateMethodName($id));
             } else {
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index 51c5fd21f6e87..60fa55c3b5451 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -752,7 +752,7 @@ public function testExpressionReferencingPrivateService()
             ->setPublic(false);
         $container->register('public_foo', 'stdClass')
             ->setPublic(true)
-            ->addArgument(new Expression('service("private_foo")'));
+            ->addArgument(new Expression('service("private_foo").bar'));
 
         $container->compile();
         $dumper = new PhpDumper($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9.php
index ad316b23c6ee9..fc04f5faeece0 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9.php
@@ -126,7 +126,7 @@ protected function getConfiguredServiceSimpleService()
     {
         $this->services['configured_service_simple'] = $instance = new \stdClass();
 
-        ${($_ = isset($this->services['configurator_service_simple']) ? $this->services['configurator_service_simple'] : $this->services['configurator_service_simple'] = new \ConfClass('bar')) && false ?: '_'}->configureStdClass($instance);
+        ${($_ = isset($this->services['configurator_service_simple']) ? $this->services['configurator_service_simple'] : ($this->services['configurator_service_simple'] = new \ConfClass('bar'))) && false ?: '_'}->configureStdClass($instance);
 
         return $instance;
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
index 4b6e2f59e65a1..fa032cbc1f94d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
@@ -243,7 +243,7 @@ use Symfony\Component\DependencyInjection\Argument\RewindableGenerator;
 
 return $this->services['tagged_iterator'] = new \Bar(new RewindableGenerator(function () {
     yield 0 => ${($_ = isset($this->services['foo']) ? $this->services['foo'] : $this->load('getFooService.php')) && false ?: '_'};
-    yield 1 => ${($_ = isset($this->services['tagged_iterator_foo']) ? $this->services['tagged_iterator_foo'] : $this->services['tagged_iterator_foo'] = new \Bar()) && false ?: '_'};
+    yield 1 => ${($_ = isset($this->services['tagged_iterator_foo']) ? $this->services['tagged_iterator_foo'] : ($this->services['tagged_iterator_foo'] = new \Bar())) && false ?: '_'};
 }, 2));
 
     [Container%s/getTaggedIteratorFooService.php] => <?php
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
index 37cc5be358634..b741950fa697b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
@@ -355,7 +355,7 @@ protected function getTaggedIteratorService()
     {
         return $this->services['tagged_iterator'] = new \Bar(new RewindableGenerator(function () {
             yield 0 => ${($_ = isset($this->services['foo']) ? $this->services['foo'] : $this->getFooService()) && false ?: '_'};
-            yield 1 => ${($_ = isset($this->services['tagged_iterator_foo']) ? $this->services['tagged_iterator_foo'] : $this->services['tagged_iterator_foo'] = new \Bar()) && false ?: '_'};
+            yield 1 => ${($_ = isset($this->services['tagged_iterator_foo']) ? $this->services['tagged_iterator_foo'] : ($this->services['tagged_iterator_foo'] = new \Bar())) && false ?: '_'};
         }, 2));
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php
index 9c54acc6bea3b..8aa4a2c406b6f 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php
@@ -331,7 +331,7 @@ protected function getManager2Service()
      */
     protected function getRootService()
     {
-        return $this->services['root'] = new \stdClass(${($_ = isset($this->services['level2']) ? $this->services['level2'] : $this->getLevel2Service()) && false ?: '_'}, ${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : $this->services['multiuse1'] = new \stdClass()) && false ?: '_'});
+        return $this->services['root'] = new \stdClass(${($_ = isset($this->services['level2']) ? $this->services['level2'] : $this->getLevel2Service()) && false ?: '_'}, ${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : ($this->services['multiuse1'] = new \stdClass())) && false ?: '_'});
     }
 
     /**
@@ -397,7 +397,7 @@ protected function getLevel3Service()
      */
     protected function getLevel4Service()
     {
-        return $this->services['level4'] = new \stdClass(${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : $this->services['multiuse1'] = new \stdClass()) && false ?: '_'}, ${($_ = isset($this->services['level5']) ? $this->services['level5'] : $this->getLevel5Service()) && false ?: '_'});
+        return $this->services['level4'] = new \stdClass(${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : ($this->services['multiuse1'] = new \stdClass())) && false ?: '_'}, ${($_ = isset($this->services['level5']) ? $this->services['level5'] : $this->getLevel5Service()) && false ?: '_'});
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
index bd08c4d15f67b..a5de37f12c931 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
@@ -126,7 +126,7 @@ protected function getBar3Service()
     {
         $this->services['bar3'] = $instance = new \BarCircular();
 
-        $a = ${($_ = isset($this->services['foobar3']) ? $this->services['foobar3'] : $this->services['foobar3'] = new \FoobarCircular()) && false ?: '_'};
+        $a = ${($_ = isset($this->services['foobar3']) ? $this->services['foobar3'] : ($this->services['foobar3'] = new \FoobarCircular())) && false ?: '_'};
 
         $instance->addFoobar($a, $a);
 
@@ -431,7 +431,7 @@ protected function getManager2Service()
      */
     protected function getRootService()
     {
-        return $this->services['root'] = new \stdClass(${($_ = isset($this->services['level2']) ? $this->services['level2'] : $this->getLevel2Service()) && false ?: '_'}, ${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : $this->services['multiuse1'] = new \stdClass()) && false ?: '_'});
+        return $this->services['root'] = new \stdClass(${($_ = isset($this->services['level2']) ? $this->services['level2'] : $this->getLevel2Service()) && false ?: '_'}, ${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : ($this->services['multiuse1'] = new \stdClass())) && false ?: '_'});
     }
 
     /**
@@ -497,7 +497,7 @@ protected function getLevel3Service()
      */
     protected function getLevel4Service()
     {
-        return $this->services['level4'] = new \stdClass(${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : $this->services['multiuse1'] = new \stdClass()) && false ?: '_'}, ${($_ = isset($this->services['level5']) ? $this->services['level5'] : $this->getLevel5Service()) && false ?: '_'});
+        return $this->services['level4'] = new \stdClass(${($_ = isset($this->services['multiuse1']) ? $this->services['multiuse1'] : ($this->services['multiuse1'] = new \stdClass())) && false ?: '_'}, ${($_ = isset($this->services['level5']) ? $this->services['level5'] : $this->getLevel5Service()) && false ?: '_'});
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
index 91114fd9788e6..dab23e1dbcc12 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
@@ -73,7 +73,7 @@ public function isFrozen()
      */
     protected function getBarService()
     {
-        return $this->services['bar'] = new \stdClass(${($_ = isset($this->services['bar_%env(BAR)%']) ? $this->services['bar_%env(BAR)%'] : $this->services['bar_%env(BAR)%'] = new \stdClass()) && false ?: '_'});
+        return $this->services['bar'] = new \stdClass(${($_ = isset($this->services['bar_%env(BAR)%']) ? $this->services['bar_%env(BAR)%'] : ($this->services['bar_%env(BAR)%'] = new \stdClass())) && false ?: '_'});
     }
 
     /**
@@ -83,7 +83,7 @@ protected function getBarService()
      */
     protected function getFooService()
     {
-        return $this->services['foo'] = new \stdClass(${($_ = isset($this->services['bar_%env(BAR)%']) ? $this->services['bar_%env(BAR)%'] : $this->services['bar_%env(BAR)%'] = new \stdClass()) && false ?: '_'}, array('baz_'.$this->getEnv('string:BAR') => new \stdClass()));
+        return $this->services['foo'] = new \stdClass(${($_ = isset($this->services['bar_%env(BAR)%']) ? $this->services['bar_%env(BAR)%'] : ($this->services['bar_%env(BAR)%'] = new \stdClass())) && false ?: '_'}, array('baz_'.$this->getEnv('string:BAR') => new \stdClass()));
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php
index 08a474eea33d8..c6927eb95d653 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php
@@ -110,7 +110,7 @@ protected function getC2Service()
         include_once $this->targetDirs[1].'/includes/HotPath/C2.php';
         include_once $this->targetDirs[1].'/includes/HotPath/C3.php';
 
-        return $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C2'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C2(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3'] : $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3()) && false ?: '_'});
+        return $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C2'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C2(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3'] : ($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C3())) && false ?: '_'});
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_legacy_privates.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_legacy_privates.php
index 7aa1bff87069a..d720ae396f890 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_legacy_privates.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_legacy_privates.php
@@ -98,7 +98,7 @@ public function isFrozen()
      */
     protected function getBarService()
     {
-        return $this->services['bar'] = new \stdClass(${($_ = isset($this->services['private_not_inlined']) ? $this->services['private_not_inlined'] : $this->services['private_not_inlined'] = new \stdClass()) && false ?: '_'});
+        return $this->services['bar'] = new \stdClass(${($_ = isset($this->services['private_not_inlined']) ? $this->services['private_not_inlined'] : ($this->services['private_not_inlined'] = new \stdClass())) && false ?: '_'});
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
index 496f6aa77d306..c436aea407c83 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
@@ -76,7 +76,7 @@ public function isFrozen()
      */
     protected function getBarServiceService()
     {
-        return $this->services['bar_service'] = new \stdClass(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : $this->services['baz_service'] = new \stdClass()) && false ?: '_'});
+        return $this->services['bar_service'] = new \stdClass(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : ($this->services['baz_service'] = new \stdClass())) && false ?: '_'});
     }
 
     /**
@@ -89,7 +89,7 @@ protected function getFooServiceService()
         return $this->services['foo_service'] = new \Symfony\Component\DependencyInjection\ServiceLocator(array('bar' => function () {
             return ${($_ = isset($this->services['bar_service']) ? $this->services['bar_service'] : $this->getBarServiceService()) && false ?: '_'};
         }, 'baz' => function () {
-            $f = function (\stdClass $v) { return $v; }; return $f(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : $this->services['baz_service'] = new \stdClass()) && false ?: '_'});
+            $f = function (\stdClass $v) { return $v; }; return $f(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : ($this->services['baz_service'] = new \stdClass())) && false ?: '_'});
         }, 'nil' => function () {
             return NULL;
         }));
@@ -133,7 +133,7 @@ protected function getTranslator_Loader3Service()
     protected function getTranslator1Service()
     {
         return $this->services['translator_1'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(array('translator.loader_1' => function () {
-            return ${($_ = isset($this->services['translator.loader_1']) ? $this->services['translator.loader_1'] : $this->services['translator.loader_1'] = new \stdClass()) && false ?: '_'};
+            return ${($_ = isset($this->services['translator.loader_1']) ? $this->services['translator.loader_1'] : ($this->services['translator.loader_1'] = new \stdClass())) && false ?: '_'};
         })));
     }
 
@@ -145,10 +145,10 @@ protected function getTranslator1Service()
     protected function getTranslator2Service()
     {
         $this->services['translator_2'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(array('translator.loader_2' => function () {
-            return ${($_ = isset($this->services['translator.loader_2']) ? $this->services['translator.loader_2'] : $this->services['translator.loader_2'] = new \stdClass()) && false ?: '_'};
+            return ${($_ = isset($this->services['translator.loader_2']) ? $this->services['translator.loader_2'] : ($this->services['translator.loader_2'] = new \stdClass())) && false ?: '_'};
         })));
 
-        $instance->addResource('db', ${($_ = isset($this->services['translator.loader_2']) ? $this->services['translator.loader_2'] : $this->services['translator.loader_2'] = new \stdClass()) && false ?: '_'}, 'nl');
+        $instance->addResource('db', ${($_ = isset($this->services['translator.loader_2']) ? $this->services['translator.loader_2'] : ($this->services['translator.loader_2'] = new \stdClass())) && false ?: '_'}, 'nl');
 
         return $instance;
     }
@@ -161,10 +161,10 @@ protected function getTranslator2Service()
     protected function getTranslator3Service()
     {
         $this->services['translator_3'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(array('translator.loader_3' => function () {
-            return ${($_ = isset($this->services['translator.loader_3']) ? $this->services['translator.loader_3'] : $this->services['translator.loader_3'] = new \stdClass()) && false ?: '_'};
+            return ${($_ = isset($this->services['translator.loader_3']) ? $this->services['translator.loader_3'] : ($this->services['translator.loader_3'] = new \stdClass())) && false ?: '_'};
         })));
 
-        $a = ${($_ = isset($this->services['translator.loader_3']) ? $this->services['translator.loader_3'] : $this->services['translator.loader_3'] = new \stdClass()) && false ?: '_'};
+        $a = ${($_ = isset($this->services['translator.loader_3']) ? $this->services['translator.loader_3'] : ($this->services['translator.loader_3'] = new \stdClass())) && false ?: '_'};
 
         $instance->addResource('db', $a, 'nl');
         $instance->addResource('db', $a, 'en');
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
index 1275e9f2642a3..8ef589c127c54 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
@@ -67,7 +67,7 @@ public function isFrozen()
      */
     protected function getBarServiceService()
     {
-        return $this->services['bar_service'] = new \stdClass(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : $this->services['baz_service'] = new \stdClass()) && false ?: '_'});
+        return $this->services['bar_service'] = new \stdClass(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : ($this->services['baz_service'] = new \stdClass())) && false ?: '_'});
     }
 
     /**
@@ -77,7 +77,7 @@ protected function getBarServiceService()
      */
     protected function getFooServiceService()
     {
-        return $this->services['foo_service'] = new \stdClass(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : $this->services['baz_service'] = new \stdClass()) && false ?: '_'});
+        return $this->services['foo_service'] = new \stdClass(${($_ = isset($this->services['baz_service']) ? $this->services['baz_service'] : ($this->services['baz_service'] = new \stdClass())) && false ?: '_'});
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php
index fe84f49753c52..75cbc2730b056 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php
@@ -67,7 +67,7 @@ public function isFrozen()
      */
     protected function getPublicFooService()
     {
-        return $this->services['public_foo'] = new \stdClass(${($_ = isset($this->services['private_foo']) ? $this->services['private_foo'] : $this->services['private_foo'] = new \stdClass()) && false ?: '_'});
+        return $this->services['public_foo'] = new \stdClass(${($_ = isset($this->services['private_foo']) ? $this->services['private_foo'] : ($this->services['private_foo'] = new \stdClass())) && false ?: '_'}->bar);
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php
index 90836aa90debd..efbb0023164b1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php
@@ -78,7 +78,7 @@ protected function getRot13EnvVarProcessorService()
     protected function getContainer_EnvVarProcessorsLocatorService()
     {
         return $this->services['container.env_var_processors_locator'] = new \Symfony\Component\DependencyInjection\ServiceLocator(array('rot13' => function () {
-            return ${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor'] : $this->services['Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor'] = new \Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor()) && false ?: '_'};
+            return ${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor'] : ($this->services['Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor'] = new \Symfony\Component\DependencyInjection\Tests\Dumper\Rot13EnvVarProcessor())) && false ?: '_'};
         }));
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php
index 9475c923068f2..8f198f0ba8355 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php
@@ -84,13 +84,13 @@ protected function getTestServiceSubscriberService()
     protected function getFooServiceService()
     {
         return $this->services['foo_service'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber((new \Symfony\Component\DependencyInjection\ServiceLocator(array('Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition' => function () {
-            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition $v = null) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] : $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition()) && false ?: '_'});
+            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition $v = null) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] : ($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition())) && false ?: '_'});
         }, 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber' => function () {
-            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber $v) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] : $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber()) && false ?: '_'});
+            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber $v) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] : ($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber())) && false ?: '_'});
         }, 'bar' => function () {
-            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition $v) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] : $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber()) && false ?: '_'});
+            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition $v) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] : ($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber())) && false ?: '_'});
         }, 'baz' => function () {
-            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition $v = null) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] : $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition()) && false ?: '_'});
+            $f = function (\Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition $v = null) { return $v; }; return $f(${($_ = isset($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition']) ? $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] : ($this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\CustomDefinition())) && false ?: '_'});
         })))->withContext('foo_service', $this));
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
index 4d0c00b289138..c53e336d278bd 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
@@ -107,7 +107,7 @@ protected function getBazService()
     {
         $this->services['baz'] = $instance = new \stdClass();
 
-        $instance->foo3 = ${($_ = isset($this->services['foo3']) ? $this->services['foo3'] : $this->services['foo3'] = new \stdClass()) && false ?: '_'};
+        $instance->foo3 = ${($_ = isset($this->services['foo3']) ? $this->services['foo3'] : ($this->services['foo3'] = new \stdClass())) && false ?: '_'};
 
         return $instance;
     }
diff --git a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
index 7577b85a12136..967bb9fba10ee 100644
--- a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
+++ b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
@@ -132,19 +132,24 @@ public function dispatch($eventName, Event $event = null)
         }
 
         $this->preProcess($eventName);
-        $this->preDispatch($eventName, $event);
-
-        $e = $this->stopwatch->start($eventName, 'section');
-
-        $this->dispatcher->dispatch($eventName, $event);
-
-        if ($e->isStarted()) {
-            $e->stop();
+        try {
+            $this->preDispatch($eventName, $event);
+            try {
+                $e = $this->stopwatch->start($eventName, 'section');
+                try {
+                    $this->dispatcher->dispatch($eventName, $event);
+                } finally {
+                    if ($e->isStarted()) {
+                        $e->stop();
+                    }
+                }
+            } finally {
+                $this->postDispatch($eventName, $event);
+            }
+        } finally {
+            $this->postProcess($eventName);
         }
 
-        $this->postDispatch($eventName, $event);
-        $this->postProcess($eventName);
-
         return $event;
     }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
index 9e03606a3ec70..3e125bc82be36 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
@@ -146,7 +146,7 @@ public function reverseTransform($value)
             return;
         }
 
-        if ('NaN' === $value) {
+        if (\in_array($value, array('NaN', 'NAN', 'nan'), true)) {
             throw new TransformationFailedException('"NaN" is not a valid number');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
index 1b699d51e84ab..56fcfe17e9bf7 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
@@ -105,6 +105,7 @@ public function configureOptions(OptionsResolver $resolver)
             'data_class' => $dataClass,
             'empty_data' => $emptyData,
             'multiple' => false,
+            'allow_file_upload' => true,
         ));
     }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/FormType.php b/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
index 363fd46590271..89b9dd8ff5335 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
@@ -178,6 +178,7 @@ public function configureOptions(OptionsResolver $resolver)
             'attr' => array(),
             'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.',
             'upload_max_size_message' => $uploadMaxSizeMessage, // internal
+            'allow_file_upload' => false,
         ));
 
         $resolver->setAllowedTypes('label_attr', 'array');
diff --git a/src/Symfony/Component/Form/Form.php b/src/Symfony/Component/Form/Form.php
index 8b15447d1b27a..f3cfc7212ac17 100644
--- a/src/Symfony/Component/Form/Form.php
+++ b/src/Symfony/Component/Form/Form.php
@@ -532,6 +532,11 @@ public function submit($submittedData, $clearMissing = true)
             $submittedData = null;
         } elseif (is_scalar($submittedData)) {
             $submittedData = (string) $submittedData;
+        } elseif ($this->config->getOption('allow_file_upload')) {
+            // no-op
+        } elseif ($this->config->getRequestHandler()->isFileUpload($submittedData)) {
+            $submittedData = null;
+            $this->transformationFailure = new TransformationFailedException('Submitted data was expected to be text or number, file upload given.');
         }
 
         $dispatcher = $this->config->getEventDispatcher();
@@ -541,6 +546,10 @@ public function submit($submittedData, $clearMissing = true)
         $viewData = null;
 
         try {
+            if (null !== $this->transformationFailure) {
+                throw $this->transformationFailure;
+            }
+
             // Hook to change content of the data submitted by the browser
             if ($dispatcher->hasListeners(FormEvents::PRE_SUBMIT)) {
                 $event = new FormEvent($this, $submittedData);
diff --git a/src/Symfony/Component/Form/Tests/CompoundFormTest.php b/src/Symfony/Component/Form/Tests/CompoundFormTest.php
index 336593f7f7639..4a6590ded5af3 100644
--- a/src/Symfony/Component/Form/Tests/CompoundFormTest.php
+++ b/src/Symfony/Component/Form/Tests/CompoundFormTest.php
@@ -707,7 +707,7 @@ public function testSubmitPostOrPutRequestWithSingleChildForm($method)
             'REQUEST_METHOD' => $method,
         ));
 
-        $form = $this->getBuilder('image')
+        $form = $this->getBuilder('image', null, null, array('allow_file_upload' => true))
             ->setMethod($method)
             ->setRequestHandler(new HttpFoundationRequestHandler())
             ->getForm();
@@ -1036,6 +1036,21 @@ public function testDisabledButtonIsNotSubmitted()
         $this->assertFalse($submit->isSubmitted());
     }
 
+    public function testFileUpload()
+    {
+        $reqHandler = new HttpFoundationRequestHandler();
+        $this->form->add($this->getBuilder('foo')->setRequestHandler($reqHandler)->getForm());
+        $this->form->add($this->getBuilder('bar')->setRequestHandler($reqHandler)->getForm());
+
+        $this->form->submit(array(
+            'foo' => 'Foo',
+            'bar' => new UploadedFile(__FILE__, 'upload.png', 'image/png', 123, UPLOAD_ERR_OK),
+        ));
+
+        $this->assertSame('Submitted data was expected to be text or number, file upload given.', $this->form->get('bar')->getTransformationFailure()->getMessage());
+        $this->assertNull($this->form->get('bar')->getData());
+    }
+
     protected function createForm()
     {
         return $this->getBuilder()
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
index d6a4662102232..176d3a9a58f9e 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
@@ -514,24 +514,24 @@ public function testReverseTransformExpectsValidNumber()
 
     /**
      * @expectedException \Symfony\Component\Form\Exception\TransformationFailedException
+     * @dataProvider nanRepresentationProvider
      *
      * @see https://github.com/symfony/symfony/issues/3161
      */
-    public function testReverseTransformDisallowsNaN()
+    public function testReverseTransformDisallowsNaN($nan)
     {
         $transformer = new NumberToLocalizedStringTransformer();
 
-        $transformer->reverseTransform('NaN');
+        $transformer->reverseTransform($nan);
     }
 
-    /**
-     * @expectedException \Symfony\Component\Form\Exception\TransformationFailedException
-     */
-    public function testReverseTransformDisallowsNaN2()
+    public function nanRepresentationProvider()
     {
-        $transformer = new NumberToLocalizedStringTransformer();
-
-        $transformer->reverseTransform('nan');
+        return array(
+            array('nan'),
+            array('NaN'), // see https://github.com/symfony/symfony/issues/3161
+            array('NAN'),
+        );
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.json b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.json
index 6aba3b60ecb12..e9c1a0f4963e8 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.json
+++ b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.json
@@ -29,6 +29,7 @@
         "parent": {
             "Symfony\\Component\\Form\\Extension\\Core\\Type\\FormType": [
                 "action",
+                "allow_file_upload",
                 "attr",
                 "auto_initialize",
                 "block_name",
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.txt b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.txt
index 874dede77f7f5..92759b1b0b467 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.txt
+++ b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_1.txt
@@ -8,16 +8,17 @@ Symfony\Component\Form\Extension\Core\Type\ChoiceType (Block prefix: "choice")
   choice_attr                 FormType             FormType                  FormTypeCsrfExtension  
   choice_label               -------------------- ------------------------- ----------------------- 
   choice_loader               compound             action                    csrf_field_name        
-  choice_name                 data_class           attr                      csrf_message           
-  choice_translation_domain   empty_data           auto_initialize           csrf_protection        
-  choice_value                error_bubbling       block_name                csrf_token_id          
-  choices                     trim                 by_reference              csrf_token_manager     
-  choices_as_values                                data                                             
-  expanded                                         disabled                                         
-  group_by                                         inherit_data                                     
-  multiple                                         label                                            
-  placeholder                                      label_attr                                       
-  preferred_choices                                label_format                                     
+  choice_name                 data_class           allow_file_upload         csrf_message           
+  choice_translation_domain   empty_data           attr                      csrf_protection        
+  choice_value                error_bubbling       auto_initialize           csrf_token_id          
+  choices                     trim                 block_name                csrf_token_manager     
+  choices_as_values                                by_reference                                     
+  expanded                                         data                                             
+  group_by                                         disabled                                         
+  multiple                                         inherit_data                                     
+  placeholder                                      label                                            
+  preferred_choices                                label_attr                                       
+                                                   label_format                                     
                                                    mapped                                           
                                                    method                                           
                                                    post_max_size_message                            
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.json b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.json
index bdefb5c946626..6c18e7169f394 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.json
+++ b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.json
@@ -4,6 +4,7 @@
     "options": {
         "own": [
             "action",
+            "allow_file_upload",
             "attr",
             "auto_initialize",
             "block_name",
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.txt b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.txt
index 72b13dfef75aa..24dfb07e074d5 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.txt
+++ b/src/Symfony/Component/Form/Tests/Fixtures/Descriptor/resolved_form_type_2.txt
@@ -6,6 +6,7 @@ Symfony\Component\Form\Extension\Core\Type\FormType (Block prefix: "form")
   Options                  
  ------------------------- 
   action                   
+  allow_file_upload        
   attr                     
   auto_initialize          
   block_name               
diff --git a/src/Symfony/Component/HttpKernel/HttpKernel.php b/src/Symfony/Component/HttpKernel/HttpKernel.php
index 36c673093bcc8..f34d9b32251b3 100644
--- a/src/Symfony/Component/HttpKernel/HttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/HttpKernel.php
@@ -263,6 +263,9 @@ private function handleException(\Exception $e, $request, $type)
         }
     }
 
+    /**
+     * Returns a human-readable string for the specified variable.
+     */
     private function varToString($var)
     {
         if (\is_object($var)) {
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index bfc961f50511f..faea3086e5420 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -67,11 +67,11 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     private $requestStackSize = 0;
     private $resetServices = false;
 
-    const VERSION = '3.4.19';
-    const VERSION_ID = 30419;
+    const VERSION = '3.4.20';
+    const VERSION_ID = 30420;
     const MAJOR_VERSION = 3;
     const MINOR_VERSION = 4;
-    const RELEASE_VERSION = 19;
+    const RELEASE_VERSION = 20;
     const EXTRA_VERSION = '';
 
     const END_OF_MAINTENANCE = '11/2020';
diff --git a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
index b598d49d3e83f..0d7c3df0decfb 100644
--- a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
+++ b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
@@ -638,8 +638,8 @@ public function setSymbol($attr, $value)
     /**
      * Not supported. Set a text attribute.
      *
-     * @param int $attr  An attribute specifier, one of the text attribute constants
-     * @param int $value The attribute value
+     * @param int    $attr  An attribute specifier, one of the text attribute constants
+     * @param string $value The attribute value
      *
      * @return bool true on success or false on failure
      *
diff --git a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
index 90e4c234fb1dd..2e358f458600b 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
@@ -687,7 +687,8 @@ private function writeCollection($zval, $property, $collection, $addMethod, $rem
      */
     private function getWriteAccessInfo($class, $property, $value)
     {
-        $key = str_replace('\\', '.', $class).'..'.$property;
+        $useAdderAndRemover = \is_array($value) || $value instanceof \Traversable;
+        $key = str_replace('\\', '.', $class).'..'.$property.'..'.(int) $useAdderAndRemover;
 
         if (isset($this->writePropertyCache[$key])) {
             return $this->writePropertyCache[$key];
@@ -707,6 +708,16 @@ private function getWriteAccessInfo($class, $property, $value)
         $camelized = $this->camelize($property);
         $singulars = (array) Inflector::singularize($camelized);
 
+        if ($useAdderAndRemover) {
+            $methods = $this->findAdderAndRemover($reflClass, $singulars);
+
+            if (null !== $methods) {
+                $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_ADDER_AND_REMOVER;
+                $access[self::ACCESS_ADDER] = $methods[0];
+                $access[self::ACCESS_REMOVER] = $methods[1];
+            }
+        }
+
         if (!isset($access[self::ACCESS_TYPE])) {
             $setter = 'set'.$camelized;
             $getsetter = lcfirst($camelized); // jQuery style, e.g. read: last(), write: last($item)
@@ -728,22 +739,16 @@ private function getWriteAccessInfo($class, $property, $value)
                 $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_MAGIC;
                 $access[self::ACCESS_NAME] = $setter;
             } elseif (null !== $methods = $this->findAdderAndRemover($reflClass, $singulars)) {
-                if (\is_array($value) || $value instanceof \Traversable) {
-                    $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_ADDER_AND_REMOVER;
-                    $access[self::ACCESS_ADDER] = $methods[0];
-                    $access[self::ACCESS_REMOVER] = $methods[1];
-                } else {
-                    $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_NOT_FOUND;
-                    $access[self::ACCESS_NAME] = sprintf(
-                        'The property "%s" in class "%s" can be defined with the methods "%s()" but '.
-                        'the new value must be an array or an instance of \Traversable, '.
-                        '"%s" given.',
-                        $property,
-                        $reflClass->name,
-                        implode('()", "', $methods),
-                        \is_object($value) ? \get_class($value) : \gettype($value)
-                    );
-                }
+                $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_NOT_FOUND;
+                $access[self::ACCESS_NAME] = sprintf(
+                    'The property "%s" in class "%s" can be defined with the methods "%s()" but '.
+                    'the new value must be an array or an instance of \Traversable, '.
+                    '"%s" given.',
+                    $property,
+                    $reflClass->name,
+                    implode('()", "', $methods),
+                    \is_object($value) ? \get_class($value) : \gettype($value)
+                );
             } else {
                 $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_NOT_FOUND;
                 $access[self::ACCESS_NAME] = sprintf(
@@ -783,6 +788,18 @@ private function isPropertyWritable($object, $property)
 
         $access = $this->getWriteAccessInfo(\get_class($object), $property, array());
 
+        $isWritable = self::ACCESS_TYPE_METHOD === $access[self::ACCESS_TYPE]
+            || self::ACCESS_TYPE_PROPERTY === $access[self::ACCESS_TYPE]
+            || self::ACCESS_TYPE_ADDER_AND_REMOVER === $access[self::ACCESS_TYPE]
+            || (!$access[self::ACCESS_HAS_PROPERTY] && property_exists($object, $property))
+            || self::ACCESS_TYPE_MAGIC === $access[self::ACCESS_TYPE];
+
+        if ($isWritable) {
+            return true;
+        }
+
+        $access = $this->getWriteAccessInfo(\get_class($object), $property, '');
+
         return self::ACCESS_TYPE_METHOD === $access[self::ACCESS_TYPE]
             || self::ACCESS_TYPE_PROPERTY === $access[self::ACCESS_TYPE]
             || self::ACCESS_TYPE_ADDER_AND_REMOVER === $access[self::ACCESS_TYPE]
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
index cf6152380d1f2..894fbd5c0df0e 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
@@ -719,7 +719,27 @@ public function testWriteToPluralPropertyWhileSingularOneExists()
         $this->propertyAccessor->isWritable($object, 'emails'); //cache access info
         $this->propertyAccessor->setValue($object, 'emails', array('test@email.com'));
 
-        self::assertEquals(array('test@email.com'), $object->getEmails());
-        self::assertNull($object->getEmail());
+        $this->assertEquals(array('test@email.com'), $object->getEmails());
+        $this->assertNull($object->getEmail());
+    }
+
+    public function testAdderAndRemoverArePreferredOverSetter()
+    {
+        $object = new TestPluralAdderRemoverAndSetter();
+
+        $this->propertyAccessor->isWritable($object, 'emails'); //cache access info
+        $this->propertyAccessor->setValue($object, 'emails', array('test@email.com'));
+
+        $this->assertEquals(array('test@email.com'), $object->getEmails());
+    }
+
+    public function testAdderAndRemoverArePreferredOverSetterForSameSingularAndPlural()
+    {
+        $object = new TestPluralAdderRemoverAndSetterSameSingularAndPlural();
+
+        $this->propertyAccessor->isWritable($object, 'aircraft'); //cache access info
+        $this->propertyAccessor->setValue($object, 'aircraft', array('aeroplane'));
+
+        $this->assertEquals(array('aeroplane'), $object->getAircraft());
     }
 }
diff --git a/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetter.php b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetter.php
new file mode 100644
index 0000000000000..ecb3f9b4a9d32
--- /dev/null
+++ b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetter.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\PropertyAccess\Tests;
+
+class TestPluralAdderRemoverAndSetter
+{
+    private $emails = array();
+
+    public function getEmails()
+    {
+        return $this->emails;
+    }
+
+    public function setEmails(array $emails)
+    {
+        $this->emails = array('foo@email.com');
+    }
+
+    public function addEmail($email)
+    {
+        $this->emails[] = $email;
+    }
+
+    public function removeEmail($email)
+    {
+        $this->emails = array_diff($this->emails, array($email));
+    }
+}
diff --git a/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetterSameSingularAndPlural.php b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetterSameSingularAndPlural.php
new file mode 100644
index 0000000000000..bb3b4f4688dc5
--- /dev/null
+++ b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetterSameSingularAndPlural.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace Symfony\Component\PropertyAccess\Tests;
+
+class TestPluralAdderRemoverAndSetterSameSingularAndPlural
+{
+    private $aircraft = array();
+
+    public function getAircraft()
+    {
+        return $this->aircraft;
+    }
+
+    public function setAircraft(array $aircraft)
+    {
+        $this->aircraft = array('plane');
+    }
+
+    public function addAircraft($aircraft)
+    {
+        $this->aircraft[] = $aircraft;
+    }
+
+    public function removeAircraft($aircraft)
+    {
+        $this->aircraft = array_diff($this->aircraft, array($aircraft));
+    }
+}
diff --git a/src/Symfony/Component/Routing/Matcher/UrlMatcher.php b/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
index 69d73906fe4ef..4b6494288ec6e 100644
--- a/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
@@ -118,19 +118,24 @@ public function addExpressionLanguageProvider(ExpressionFunctionProviderInterfac
      */
     protected function matchCollection($pathinfo, RouteCollection $routes)
     {
+        // HEAD and GET are equivalent as per RFC
+        if ('HEAD' === $method = $this->context->getMethod()) {
+            $method = 'GET';
+        }
         $supportsTrailingSlash = '/' !== $pathinfo && '' !== $pathinfo && $this instanceof RedirectableUrlMatcherInterface;
 
         foreach ($routes as $name => $route) {
             $compiledRoute = $route->compile();
             $staticPrefix = $compiledRoute->getStaticPrefix();
+            $requiredMethods = $route->getMethods();
 
             // check the static prefix of the URL first. Only use the more expensive preg_match when it matches
             if ('' === $staticPrefix || 0 === strpos($pathinfo, $staticPrefix)) {
                 // no-op
-            } elseif (!$supportsTrailingSlash) {
+            } elseif (!$supportsTrailingSlash || ($requiredMethods && !\in_array('GET', $requiredMethods)) || 'GET' !== $method) {
                 continue;
             } elseif ('/' === substr($staticPrefix, -1) && substr($staticPrefix, 0, -1) === $pathinfo) {
-                return;
+                return $this->allow = array();
             } else {
                 continue;
             }
@@ -148,7 +153,10 @@ protected function matchCollection($pathinfo, RouteCollection $routes)
             }
 
             if ($hasTrailingSlash && '/' !== substr($pathinfo, -1)) {
-                return;
+                if ((!$requiredMethods || \in_array('GET', $requiredMethods)) && 'GET' === $method) {
+                    return $this->allow = array();
+                }
+                continue;
             }
 
             $hostMatches = array();
@@ -163,12 +171,7 @@ protected function matchCollection($pathinfo, RouteCollection $routes)
             }
 
             // check HTTP method requirement
-            if ($requiredMethods = $route->getMethods()) {
-                // HEAD and GET are equivalent as per RFC
-                if ('HEAD' === $method = $this->context->getMethod()) {
-                    $method = 'GET';
-                }
-
+            if ($requiredMethods) {
                 if (!\in_array($method, $requiredMethods)) {
                     if (self::REQUIREMENT_MATCH === $status[0]) {
                         $this->allow = array_merge($this->allow, $requiredMethods);
@@ -180,6 +183,8 @@ protected function matchCollection($pathinfo, RouteCollection $routes)
 
             return $this->getAttributes($route, $name, array_replace($matches, $hostMatches, isset($status[1]) ? $status[1] : array()));
         }
+
+        return array();
     }
 
     /**
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
index a7aea0ec071d2..9857f05024d72 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
@@ -128,6 +128,23 @@ public function testFallbackPage()
         $this->assertSame(array('_route' => 'foo'), $matcher->match('/foo'));
     }
 
+    public function testSlashAndVerbPrecedenceWithRedirection()
+    {
+        $coll = new RouteCollection();
+        $coll->add('a', new Route('/api/customers/{customerId}/contactpersons', array(), array(), array(), '', array(), array('post')));
+        $coll->add('b', new Route('/api/customers/{customerId}/contactpersons/', array(), array(), array(), '', array(), array('get')));
+
+        $matcher = $this->getUrlMatcher($coll);
+        $expected = array(
+            '_route' => 'b',
+            'customerId' => '123',
+        );
+        $this->assertEquals($expected, $matcher->match('/api/customers/123/contactpersons/'));
+
+        $matcher->expects($this->once())->method('redirect')->with('/api/customers/123/contactpersons/')->willReturn(array());
+        $this->assertEquals($expected, $matcher->match('/api/customers/123/contactpersons'));
+    }
+
     protected function getUrlMatcher(RouteCollection $routes, RequestContext $context = null)
     {
         return $this->getMockForAbstractClass('Symfony\Component\Routing\Matcher\RedirectableUrlMatcher', array($routes, $context ?: new RequestContext()));
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php
index 0d4b44b090704..85647f0bead22 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php
@@ -502,6 +502,31 @@ public function testSchemeAndMethodMismatch()
         $matcher->match('/');
     }
 
+    public function testSlashAndVerbPrecedence()
+    {
+        $coll = new RouteCollection();
+        $coll->add('a', new Route('/api/customers/{customerId}/contactpersons/', array(), array(), array(), '', array(), array('post')));
+        $coll->add('b', new Route('/api/customers/{customerId}/contactpersons', array(), array(), array(), '', array(), array('get')));
+
+        $matcher = $this->getUrlMatcher($coll);
+        $expected = array(
+            '_route' => 'b',
+            'customerId' => '123',
+        );
+        $this->assertEquals($expected, $matcher->match('/api/customers/123/contactpersons'));
+
+        $coll = new RouteCollection();
+        $coll->add('a', new Route('/api/customers/{customerId}/contactpersons/', array(), array(), array(), '', array(), array('get')));
+        $coll->add('b', new Route('/api/customers/{customerId}/contactpersons', array(), array(), array(), '', array(), array('post')));
+
+        $matcher = $this->getUrlMatcher($coll, new RequestContext('', 'POST'));
+        $expected = array(
+            '_route' => 'b',
+            'customerId' => '123',
+        );
+        $this->assertEquals($expected, $matcher->match('/api/customers/123/contactpersons'));
+    }
+
     protected function getUrlMatcher(RouteCollection $routes, RequestContext $context = null)
     {
         return new UrlMatcher($routes, $context ?: new RequestContext());
diff --git a/src/Symfony/Component/Security/Http/HttpUtils.php b/src/Symfony/Component/Security/Http/HttpUtils.php
index a6bcffe4852dc..49ccc723b451f 100644
--- a/src/Symfony/Component/Security/Http/HttpUtils.php
+++ b/src/Symfony/Component/Security/Http/HttpUtils.php
@@ -59,7 +59,7 @@ public function __construct(UrlGeneratorInterface $urlGenerator = null, $urlMatc
      */
     public function createRedirectResponse(Request $request, $path, $status = 302)
     {
-        if (null !== $this->domainRegexp && preg_match('#^https?://[^/]++#i', $path, $host) && !preg_match(sprintf($this->domainRegexp, preg_quote($request->getHttpHost())), $host[0])) {
+        if (null !== $this->domainRegexp && preg_match('#^https?:[/\\\\]{2,}+[^/]++#i', $path, $host) && !preg_match(sprintf($this->domainRegexp, preg_quote($request->getHttpHost())), $host[0])) {
             $path = '/';
         }
 
diff --git a/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php b/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
index 28b242995d4bf..a0d6f79714414 100644
--- a/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
@@ -54,14 +54,28 @@ public function testCreateRedirectResponseWithRequestsDomain()
         $this->assertTrue($response->isRedirect('http://localhost/blog'));
     }
 
-    public function testCreateRedirectResponseWithBadRequestsDomain()
+    /**
+     * @dataProvider badRequestDomainUrls
+     */
+    public function testCreateRedirectResponseWithBadRequestsDomain($url)
     {
         $utils = new HttpUtils($this->getUrlGenerator(), null, '#^https?://%s$#i');
-        $response = $utils->createRedirectResponse($this->getRequest(), 'http://pirate.net/foo');
+        $response = $utils->createRedirectResponse($this->getRequest(), $url);
 
         $this->assertTrue($response->isRedirect('http://localhost/'));
     }
 
+    public function badRequestDomainUrls()
+    {
+        return array(
+            array('http://pirate.net/foo'),
+            array('http:\\\\pirate.net/foo'),
+            array('http:/\\pirate.net/foo'),
+            array('http:\\/pirate.net/foo'),
+            array('http://////pirate.net/foo'),
+        );
+    }
+
     public function testCreateRedirectResponseWithProtocolRelativeTarget()
     {
         $utils = new HttpUtils($this->getUrlGenerator(), null, '#^https?://%s$#i');
diff --git a/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php
index be469a4d53c5f..aaa4e8b940a91 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php
@@ -59,7 +59,8 @@ public function normalize($object, $format = null, array $context = array())
         $timezone = $this->getTimezone($context);
 
         if (null !== $timezone) {
-            $object = (new \DateTimeImmutable('@'.$object->getTimestamp()))->setTimezone($timezone);
+            $object = clone $object;
+            $object = $object->setTimezone($timezone);
         }
 
         return $object->format($format);
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php
index 178519b30e687..99b224996cb1b 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php
@@ -78,6 +78,82 @@ public function normalizeUsingTimeZonePassedInContextProvider()
         yield array('2016-12-01T09:00:00+09:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Japan'));
     }
 
+    /**
+     * @dataProvider normalizeUsingTimeZonePassedInContextAndExpectedFormatWithMicrosecondsProvider
+     */
+    public function testNormalizeUsingTimeZonePassedInContextAndFormattedWithMicroseconds($expected, $expectedFormat, $input, $timezone)
+    {
+        $this->assertSame(
+            $expected,
+            $this->normalizer->normalize(
+                $input,
+                null,
+                array(
+                    DateTimeNormalizer::TIMEZONE_KEY => $timezone,
+                    DateTimeNormalizer::FORMAT_KEY => $expectedFormat,
+                )
+            )
+        );
+    }
+
+    public function normalizeUsingTimeZonePassedInContextAndExpectedFormatWithMicrosecondsProvider()
+    {
+        yield array(
+            '2018-12-01T18:03:06.067634',
+            'Y-m-d\TH:i:s.u',
+            \DateTime::createFromFormat(
+                'Y-m-d\TH:i:s.u',
+                '2018-12-01T18:03:06.067634',
+                new \DateTimeZone('UTC')
+            ),
+            null,
+        );
+
+        yield array(
+            '2018-12-01T18:03:06.067634',
+            'Y-m-d\TH:i:s.u',
+            \DateTime::createFromFormat(
+                'Y-m-d\TH:i:s.u',
+                '2018-12-01T18:03:06.067634',
+                new \DateTimeZone('UTC')
+            ),
+            new \DateTimeZone('UTC'),
+        );
+
+        yield array(
+            '2018-12-01T19:03:06.067634+01:00',
+            'Y-m-d\TH:i:s.uP',
+            \DateTimeImmutable::createFromFormat(
+                'Y-m-d\TH:i:s.u',
+                '2018-12-01T18:03:06.067634',
+                new \DateTimeZone('UTC')
+            ),
+            new \DateTimeZone('Europe/Rome'),
+        );
+
+        yield array(
+            '2018-12-01T20:03:06.067634+02:00',
+            'Y-m-d\TH:i:s.uP',
+            \DateTime::createFromFormat(
+                'Y-m-d\TH:i:s.u',
+                '2018-12-01T18:03:06.067634',
+                new \DateTimeZone('UTC')
+            ),
+            new \DateTimeZone('Europe/Kiev'),
+        );
+
+        yield array(
+            '2018-12-01T21:03:06.067634',
+            'Y-m-d\TH:i:s.u',
+            \DateTime::createFromFormat(
+                'Y-m-d\TH:i:s.u',
+                '2018-12-01T18:03:06.067634',
+                new \DateTimeZone('UTC')
+            ),
+            new \DateTimeZone('Europe/Moscow'),
+        );
+    }
+
     /**
      * @expectedException \Symfony\Component\Serializer\Exception\InvalidArgumentException
      * @expectedExceptionMessage The object must implement the "\DateTimeInterface".
diff --git a/src/Symfony/Component/Validator/ConstraintViolation.php b/src/Symfony/Component/Validator/ConstraintViolation.php
index 848c77611776b..ae9ff89eb54cf 100644
--- a/src/Symfony/Component/Validator/ConstraintViolation.php
+++ b/src/Symfony/Component/Validator/ConstraintViolation.php
@@ -79,13 +79,13 @@ public function __toString()
         }
 
         $propertyPath = (string) $this->propertyPath;
-        $code = $this->code;
+        $code = (string) $this->code;
 
         if ('' !== $propertyPath && '[' !== $propertyPath[0] && '' !== $class) {
             $class .= '.';
         }
 
-        if (!empty($code)) {
+        if ('' !== $code) {
             $code = ' (code '.$code.')';
         }
 
diff --git a/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php b/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php
index 544c82f6c074b..e4f7df1757da6 100644
--- a/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php
+++ b/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php
@@ -112,7 +112,7 @@ public function getValidator();
      * Returns the currently validated object.
      *
      * If the validator is currently validating a class constraint, the
-     * object of that class is returned. If it is a validating a property or
+     * object of that class is returned. If it is validating a property or
      * getter constraint, the object that the property/getter belongs to is
      * returned.
      *
diff --git a/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php b/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
index cef4782e0f82d..edaa7fa50d6b0 100644
--- a/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
+++ b/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
@@ -53,4 +53,59 @@ public function testToStringHandlesArrayRoots()
 
         $this->assertSame($expected, (string) $violation);
     }
+
+    public function testToStringHandlesCodes()
+    {
+        $violation = new ConstraintViolation(
+            '42 cannot be used here',
+            'this is the message template',
+            array(),
+            array('some_value' => 42),
+            'some_value',
+            null,
+            null,
+            0
+        );
+
+        $expected = <<<'EOF'
+Array.some_value:
+    42 cannot be used here (code 0)
+EOF;
+
+        $this->assertSame($expected, (string) $violation);
+    }
+
+    public function testToStringOmitsEmptyCodes()
+    {
+        $expected = <<<'EOF'
+Array.some_value:
+    42 cannot be used here
+EOF;
+
+        $violation = new ConstraintViolation(
+            '42 cannot be used here',
+            'this is the message template',
+            array(),
+            array('some_value' => 42),
+            'some_value',
+            null,
+            null,
+            null
+        );
+
+        $this->assertSame($expected, (string) $violation);
+
+        $violation = new ConstraintViolation(
+            '42 cannot be used here',
+            'this is the message template',
+            array(),
+            array('some_value' => 42),
+            'some_value',
+            null,
+            null,
+            ''
+        );
+
+        $this->assertSame($expected, (string) $violation);
+    }
 }