/usr/share/php/Symfony/Component/Form/Extension/Core/ is in php-symfony-form 3.4.6+dfsg-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/php/Symfony/Component/Form/Extension/Core/CoreExtension.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataMapper/
/usr/share/php/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataMapper/RadioListMapper.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DataTransformerChain.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateIntervalToStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToRfc3339Transformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToTimestampTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeZoneToStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/MoneyToLocalizedStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
/usr/share/php/Symfony/Component/Form/Extension/Core/EventListener/
/usr/share/php/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
/usr/share/php/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php
/usr/share/php/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
/usr/share/php/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/BaseType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/BirthdayType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/ButtonType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/CheckboxType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/ColorType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/CountryType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/CurrencyType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/DateIntervalType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/DateType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/EmailType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/FileType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/FormType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/HiddenType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/IntegerType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/LanguageType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/LocaleType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/MoneyType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/NumberType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/PasswordType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/PercentType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/RadioType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/RangeType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/RepeatedType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/ResetType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/SearchType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/SubmitType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/TelType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/TextType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/TextareaType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/TimeType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php
/usr/share/php/Symfony/Component/Form/Extension/Core/Type/UrlType.php