UPGRADE FROM 6.1 to 6.2

Config

Deprecate calling *Command::setApplication(), *FormatterStyle::setForeground/setBackground(), Helper::setHelpSet(), Input*::setDefault(), Question::setAutocompleterCallback/setValidator()without any arguments
Change the signature of OutputFormatterStyleInterface::setForeground/setBackground() to setForeground/setBackground(?string)
Change the signature of HelperInterface::setHelperSet() to setHelperSet(?HelperSet)

Change the signature of ContainerAwareInterface::setContainer() to setContainer(?ContainerInterface)
Deprecate calling ContainerAwareTrait::setContainer() without arguments
Deprecate using numeric parameter names

Deprecate calling Button/Form::setParent(), ButtonBuilder/FormConfigBuilder::setDataMapper(), TransformationFailedException::setInvalidMessage() without arguments
Change the signature of FormConfigBuilderInterface::setDataMapper() to setDataMapper(?DataMapperInterface)
Change the signature of FormInterface::setParent() to setParent(?self)

Deprecate the Symfony\Component\Serializer\Normalizer\ObjectNormalizer and Symfony\Component\Serializer\Normalizer\PropertyNormalizer autowiring aliases, type-hint against Symfony\Component\Serializer\Normalizer\NormalizerInterface or implement NormalizerAwareInterface instead
Deprecate AbstractController::renderForm(), use render() instead
Deprecate FrameworkExtension::registerRateLimiter()

Deprecate Request::getContentType(), use Request::getContentTypeFormat() instead
Deprecate calling JsonResponse::setCallback(), Response::setExpires/setLastModified/setEtag(), MockArraySessionStorage/NativeSessionStorage::setMetadataBag(), NativeSessionStorage::setSaveHandler() without arguments

Deprecate implementing Http\Message\RequestFactory, StreamFactory and UriFactory on HttplugClient

Deprecate ArgumentValueResolverInterface, use ValueResolverInterface instead
Deprecate calling ConfigDataCollector::setKernel(), RouterListener::setCurrentRequest() without arguments

Deprecate MessageHandlerInterface and MessageSubscriberInterface, use the AsMessageHandler attribute instead

[BC BREAK] The following data providers for TransportTestCase are now static: toStringProvider(), supportedMessagesProvider() and unsupportedMessagesProvider()
[BC BREAK] The TransportTestCase::createTransport() method is now static

Deprecate calling PropertyAccessorBuilder::setCacheItemPool() without arguments
Implementing the PropertyPathInterface without implementing the isNullSafe() method is deprecated

Add maximum username length enforcement of 4096 characters in UserBadge to prevent session storage flooding
Deprecate the Symfony\Component\Security\Core\Security class and service, use Symfony\Bundle\SecurityBundle\Security instead
Deprecate the Symfony\Bundle\SecurityBundle\Security::ACCESS_DENIED_ERROR property, use Symfony\Component\Security\Http\SecurityRequestAttributes::ACCESS_DENIED_ERROR instead
Deprecate the Symfony\Bundle\SecurityBundle\Security::AUTHENTICATION_ERROR property, use Symfony\Component\Security\Http\SecurityRequestAttributes::AUTHENTICATION_ERROR instead
Deprecate the Symfony\Bundle\SecurityBundle\Security::LAST_USERNAME property, use Symfony\Component\Security\Http\SecurityRequestAttributes::LAST_USERNAME instead
Deprecate the Symfony\Bundle\SecurityBundle\Security::MAX_USERNAME_LENGTH property, use Symfony\Component\Security\Http\Authenticator\Passport\Badge\UserBadge::MAX_USERNAME_LENGTH instead
Passing empty username or password parameter when using JsonLoginAuthenticator is not supported anymore
Add $lifetime parameter to LoginLinkHandlerInterface::createLoginLink()
Change the signature of TokenStorageInterface::setToken() to setToken(?TokenInterface $token)
Deprecate calling TokenStorage::setToken() or UsageTrackingTokenStorage::setToken() without arguments

Deprecate calling AttributeMetadata::setSerializedName(), ClassMetadata::setClassDiscriminatorMapping() without arguments
Change the signature of AttributeMetadataInterface::setSerializedName() to setSerializedName(?string)
Change the signature of ClassMetadataInterface::setClassDiscriminatorMapping() to setClassDiscriminatorMapping(?ClassDiscriminatorMapping)

The first argument of WorkflowDumpCommand should be a ServiceLocator of all workflows indexed by names
Deprecate calling Definition::setInitialPlaces() without arguments