\Drupal\Component\Assertion\Handle is deprecated

The \Drupal\Component\Assertion\Handle is deprecated in Drupal 10.1.0 and will be removed from Drupal 11.0.0. Instead, replace the calls to \Drupal\Component\Assertion\Handle::register() method with assert_options(ASSERT_EXCEPTION, TRUE).

For this reason, example.settings.local.php has been updated to change the default assertion handling from:

assert_options(ASSERT_ACTIVE, TRUE);
\Drupal\Component\Assertion\Handle::register();

to:

assert_options(ASSERT_ACTIVE, TRUE);
assert_options(ASSERT_EXCEPTION, TRUE);

Site owners using settings.local.php for development sites should update their workflow with this change.

EDIT the assert_options() is deprecated in PHP 8.3, see https://www.drupal.org/node/3391611

to enable assertions PHP should be configured with zend.assertions