To get the diff for a specific change, go tohttps://github.com/symfony/symfony/commit/XXX where XXX is the change hash

To get the diff between two versions, go tohttps://github.com/symfony/symfony/compare/v6.4.0...v6.4.1

* 6.4.21 (2025-05-02)

* bug#60288[VarExporter] dump default value for property hooks if present (xabbuh)

* bug#60268[Contracts] Fix`ServiceSubscriberTrait` for nullable service (StevenRenaux)

* bug#60256[Mailer][Postmark] drop the`Date` header using the API transport (xabbuh)

* bug#60258[VarExporter] Fix: Use correct closure call for property-specific logic in $notByRef (Hakayashii, denjas)

* bug#60269[Notifier][Discord] Fix value limits (norkunas)

* bug#60248[Messenger] Revert " Add call to`gc_collect_cycles()` after each message is handled" (jwage)

* bug#60236[String] Support nexus -> nexuses pluralization (KorvinSzanto)

* bug#60194[Workflow] Fix dispatch of entered event when the subject is already in this marking (lyrixx)

* bug#60172[Cache] Fix invalidating on save failures with Array|ApcuAdapter (nicolas-grekas)

* bug#60122[Cache] ArrayAdapter serialization exception clean $expiries (bastien-wink)

* bug#60167[Cache] Fix proxying third party PSR-6 cache items (Dmitry Danilson)

* bug#60165[HttpKernel] Do not ignore enum in controller arguments when it has an`#[Autowire]` attribute (ruudk)

* bug#60168[Console] Correctly convert`SIGSYS` to its name (cs278)

* bug#60166[Security] fix(security): fix OIDC user identifier (vincentchalamon)

* bug#60124[Validator] : fix url validation when punycode is on tld but not on domain (joelwurtz)

* bug#60057[Mailer] Fix`Trying to access array offset on value of type null` error by adding null checking (khushaalan)

* bug#60094[DoctrineBridge] Fix support for entities that leverage native lazy objects (nicolas-grekas)

* bug#60094[DoctrineBridge] Fix support for entities that leverage native lazy objects (nicolas-grekas)

* 6.4.20 (2025-03-28)

* bug#60054[Form] Use duplicate_preferred_choices to set value of ChoiceType (aleho)