7 files declare their use of RedirectDestinationTrait in Zircon Profile 8

BulkForm.php in core/modules/system/src/Plugin/views/field/BulkForm.php

Contains \Drupal\system\Plugin\views\field\BulkForm.

ContextualLinks.php in core/modules/contextual/src/Plugin/views/field/ContextualLinks.php

Contains \Drupal\contextual\Plugin\views\field\ContextualLinks.

ControllerBase.php in core/lib/Drupal/Core/Controller/ControllerBase.php

Contains \Drupal\Core\Controller\ControllerBase.

EntityOperations.php in core/modules/views/src/Plugin/views/field/EntityOperations.php

Contains \Drupal\views\Plugin\views\field\EntityOperations.

FormBase.php in core/lib/Drupal/Core/Form/FormBase.php

Contains \Drupal\Core\Form\FormBase.

LinkBase.php in core/modules/views/src/Plugin/views/field/LinkBase.php

Contains \Drupal\views\Plugin\views\field\LinkBase.

UserLoginBlock.php in core/modules/user/src/Plugin/Block/UserLoginBlock.php

Contains \Drupal\user\Plugin\Block\UserLoginBlock.