7 calls to debug()

FieldPluginBase::addAdditionalFields in drupal/core/modules/views/lib/Drupal/views/Plugin/views/field/FieldPluginBase.php
Add 'additional' fields to the query.
hook_views_plugins_join_alter in drupal/core/modules/views/views.api.php
Modify the list of available views join plugins.
hook_views_plugins_query_alter in drupal/core/modules/views/views.api.php
Modify the list of available views query plugins.
Rss::render in drupal/core/modules/views/lib/Drupal/views/Plugin/views/style/Rss.php
Render the display in this style.
SimpleTestTest::stubTest in drupal/core/modules/simpletest/lib/Drupal/simpletest/Tests/SimpleTestTest.php
Test to be run and the results confirmed.
StylePluginBase::render in drupal/core/modules/views/lib/Drupal/views/Plugin/views/style/StylePluginBase.php
Render the display in this style.
ViewExecutable::setDisplay in drupal/core/modules/views/lib/Drupal/views/ViewExecutable.php
Sets the current display.