Symfony 2.7.4 has just been released.

Here is a list of the most important changes:

• bug 15552 [ExpressionLanguage] Fixed expressions cache key generation (inso)
• bug 15527 [Translator][fallback catalogues] fixed circular reference. (aitboudad)
• bug 15662 [Form][ Choice type] fixed groups with empty array. (aitboudad)
• bug 15601 [console] Use the description when no help is available (Nicofuma)
• bug 15649 [VarDumper] Fix missing support for dumping PHP7 return type (nicolas-grekas)
• bug 15603 [HttpKernel] Do not normalize the kernel root directory path 15567 (leofeyer)
• bug 15647 [Debug] Ignore silencing for deprecations (nicolas-grekas)
• bug 15625 Various fixes esp. on Windows (nicolas-grekas)
• bug 15428 Fix the validation of form resources to register the default theme (stof)
• bug 15623 Fix the retrieval of the value with property path when using a loader (stof)
• bug 15619 [Translation] Fix the string casting in the XliffFileLoader (stof)
• bug 15575 Add appveyor.yml for C.I. on Windows (nicolas-grekas)
• bug 15493 [VarDumper] fixed HtmlDumper to target specific the head tag (SaschaDens)
• bug 15611 [Translation][Xliff Loader] Support omitting the <target> node in an .xlf file. (leofeyer)
• bug 15608 [Form] Fix the handling of values for multiple choice types (stof)
• bug 15549 [FrameworkBundle] Fix precedence of xdebug.file_link_format (nicolas-grekas)
• bug 15589 made Symfony compatible with both Twig 1.x and 2.x (fabpot)
• bug 15590 Made Symfony 2.7 compatible with Twig 2.0 (fabpot)
• bug 15535 made Symfony compatible with both Twig 1.x and 2.x (fabpot)
• bug 15561 [Form] only use PropertyPath if not already callable (Tobion)
• bug 15588 [WebProfilerBundle] add import for Twig macro (xabbuh)
• bug 15546 [Form] fixed BC-break on grouped choice lists (origaminal)
• bug 15515 [Console] Fixed warning when command alias is longer than command name (dosten)
• bug 15251 [DoctrineBridge][Form] Fix IdReader when indexing by primary foreign key (giosh94mhz)
• bug 14372 [DoctrineBridge][Form] fix EntityChoiceList when indexing by primary foreign key (giosh94mhz)
• bug 15514 removed _self usage when not needed (fabpot)
• bug 15489 Implement the support of timezone objects in the stub IntlDateFormatter (stof)
• bug 15426 [Serializer] Add support for variadic arguments in the GetSetNormalizer (stof)
• bug 15480 [Yaml] Nested merge keys (mathroc)
• bug 15443 [Debug] Enhance DebugClassLoader performance on MacOSX (nicolas-grekas)
• bug 15445 do not remove space between attributes (greg0ire)
• bug 15263 [HttpFoundation] fixed the check of 'proxy-revalidate' in Response::mustRevalidate() (axiac)
• bug 15425 [Routing] Fix the retrieval of the default value for variadic arguments in the annotation loader (wdalmut, stof)
• bug 15074 Fixing DbalSessionHandler to work with a Oracle "limitation" or bug? (nuncanada)
• bug 13828 [Validator] Improve Iban Validation (afurculita)
• bug 15380 do not dump leading backslashes in class names (xabbuh)
• bug 15376 [ClassMapGenerator] Skip ::class constant (WouterJ)
• bug 15389 [securityBundle] Compare roles strictly when computing inherited roles (bokonet)
• bug 15170 [Config] type specific check for emptiness (xabbuh)
• bug 15411 Fix the handling of null as locale in the stub intl classes (stof)