Symfony 3.4.41 released

Symfony 3.4.41 has just been released. Here is a list of the most important changes:

• bug #36894 [Validator] never directly validate Existence (Required/Optional) constraints (@xabbuh)
• bug #37007 [Console] Fix QuestionHelper::disableStty() (@chalasr)
• bug #36865 [Form] validate subforms in all validation groups (@xabbuh)
• bug #36907 Fixes sprintf(): Too few arguments in form transformer (@pedrocasado)
• bug #37000 Add meaningful message when using ProcessHelper and Process is not installed (@l-vo)
• bug #36987 Handle fetch mode deprecation of DBAL 2.11. (@derrabus)
• bug #36974 [Security] Fixed handling of CSRF logout error (@wouterj)
• bug #36920 [VarDumper] fix PHP 8 support (@nicolas-grekas)
• bug #36917 [Cache] Accessing undefined constants raises an Error in php8 (@derrabus)
• bug #36891 Address deprecation of ReflectionType::getClass() (@derrabus)
• bug #36899 [VarDumper] ReflectionFunction::isDisabled() is deprecated (@derrabus)
• bug #36905 [Validator] Catch expected ValueError (@derrabus)
• bug #36906 [DomCrawler] Catch expected ValueError (@derrabus)
• bug #36904 [PropertyAccess] Parse php 8 TypeErrors correctly (@derrabus)
• bug #36896 [Config] Removed implicit cast of ReflectionProperty to string (@derrabus)
• bug #36882 [PhpUnitBridge] fix installing under PHP >= 8 (@nicolas-grekas)
• bug #36833 [HttpKernel] Fix that the Store would not save responses with the X-Content-Digest header present (@mpdude)
• bug #36867 [PhpUnitBridge] fix bad detection of unsilenced deprecations (@nicolas-grekas)
• bug #36855 [HttpKernel] Fix error logger when stderr is redirected to /dev/null (@fabpot)
• bug #36592 [BrowserKit] Allow Referer set by history to be overridden (@Slamdunk)
• bug #36794 [Serializer] fix issue with PHP 8 (@nicolas-grekas)
• bug #36743 [Yaml] Fix escaped quotes in quoted multi-line string (@ossinkine)
• bug #36569 [PhpUnitBridge] Mark parent class also covered in CoverageListener (@lyrixx)
• bug #36690 [Yaml] prevent notice for invalid octal numbers on PHP 7.4 (@xabbuh)
• bug #36497 [Filesystem] Handle paths on different drives (@crishoj)
• bug #36678 [WebProfiler] Do not add src-elem CSP directives if they do not exist (@ndench)
• bug #36501 [DX] Show the ParseException message in all YAML file loaders (@fancyweb)
• bug #36683 [Yaml] fix parse error when unindented collections contain a comment (@wdiesveld)
• bug #36672 [Validator] Skip validation when email is an empty object (@acrobat)
• bug #36673 [PhpUnitBridge] fix PHP 5.3 compat again (@nicolas-grekas)
• bug #36627 [Validator] fix lazy property usage. (@bendavies)
• bug #36625 [PhpUnitBridge] fix compat with PHP 5.3 (@nicolas-grekas)

Want to upgrade to this new release? Because Symfony protects backwards-compatibility very closely, this should be quite easy. Use
SymfonyInsight upgrade reports to detect the code you will need to change in your project and read our upgrade documentation to learn more.

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