14 files declare their use of ExecutionContextInterface in Zircon Profile 8

AbstractConstraintValidatorTest.php in vendor/symfony/validator/Tests/Constraints/AbstractConstraintValidatorTest.php

AbstractLegacyApiTest.php in vendor/symfony/validator/Tests/Validator/AbstractLegacyApiTest.php

AbstractValidatorTest.php in vendor/symfony/validator/Tests/Validator/AbstractValidatorTest.php

CallbackClass.php in vendor/symfony/validator/Tests/Fixtures/CallbackClass.php

CallbackValidatorTest.php in vendor/symfony/validator/Tests/Constraints/CallbackValidatorTest.php

ConstraintAValidator.php in vendor/symfony/validator/Tests/Fixtures/ConstraintAValidator.php

Entity.php in vendor/symfony/validator/Tests/Fixtures/Entity.php

ExecutionContextInterface.php in vendor/symfony/validator/Context/ExecutionContextInterface.php

LegacyConstraintViolationBuilder.php in vendor/symfony/validator/Violation/LegacyConstraintViolationBuilder.php

LinkAccessConstraintValidator.php in core/modules/link/src/Plugin/Validation/Constraint/LinkAccessConstraintValidator.php

Contains \Drupal\link\Plugin\Validation\Constraint\LinkAccessConstraintValidator.

LinkExternalProtocolsConstraintValidator.php in core/modules/link/src/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidator.php

Contains \Drupal\link\Plugin\Validation\Constraint\LinkExternalProtocolsConstraintValidator.

LinkNotExistingInternalConstraintValidator.php in core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php

Contains \Drupal\link\Plugin\Validation\Constraint\LinkNotExistingInternalConstraintValidator.

LinkTypeConstraint.php in core/modules/link/src/Plugin/Validation/Constraint/LinkTypeConstraint.php

Contains \Drupal\link\Plugin\Validation\Constraint\LinkTypeConstraint.

UserMailRequired.php in core/modules/user/src/Plugin/Validation/Constraint/UserMailRequired.php

Contains \Drupal\user\Plugin\Validation\Constraint\UserMailRequired.