11 files declare their use of CurrentPathStack in Zircon Profile 8

ActiveLinkResponseFilter.php in core/lib/Drupal/Core/EventSubscriber/ActiveLinkResponseFilter.php

Contains \Drupal\Core\EventSubscriber\ActiveLinkResponseFilter.

PathBasedBreadcrumbBuilder.php in core/modules/system/src/PathBasedBreadcrumbBuilder.php

Contains \Drupal\system\PathBasedBreadcrumbBuilder.

PathSubscriber.php in core/lib/Drupal/Core/EventSubscriber/PathSubscriber.php

Contains \Drupal\Core\EventSubscriber\PathSubscriber.

Raw.php in core/modules/views/src/Plugin/views/argument_default/Raw.php

Contains \Drupal\views\Plugin\views\argument_default\Raw.

RawTest.php in core/modules/views/tests/src/Unit/Plugin/argument_default/RawTest.php

Contains \Drupal\Tests\views\Unit\Plugin\argument_default\RawTest.

RequestPath.php in core/modules/system/src/Plugin/Condition/RequestPath.php

Contains \Drupal\system\Plugin\Condition\RequestPath.

RequestPathTest.php in core/modules/system/src/Tests/Plugin/Condition/RequestPathTest.php

Contains \Drupal\system\Tests\Plugin\Condition\RequestPathTest.

RouteProvider.php in core/lib/Drupal/Core/Routing/RouteProvider.php

Contains \Drupal\Core\Routing\RouteProvider.

RouteProviderTest.php in core/modules/system/src/Tests/Routing/RouteProviderTest.php

Contains \Drupal\system\Tests\Routing\RouteProviderTest.

UrlMatcher.php in core/lib/Drupal/Core/Routing/UrlMatcher.php

Contains \Drupal\Core\Routing\UrlMatcher.

ViewAjaxController.php in core/modules/views/src/Controller/ViewAjaxController.php

Contains \Drupal\views\Controller\ViewAjaxController.