Calling methods hasAllTags / hasAnyTag on select queries fails if query has no tag

Problem/Motivation

Calling one of the methods hasAllTags or hasAnyTag on select queries throws an error if no tags have been added to the query since the alterTags property is not initialized with an empty array.

Error: Typed property Drupal\Core\Database\Query\Select::$alterTags must not be accessed before initialization in Drupal\Core\Database\Query\Select->hasAnyTag()

Steps to reproduce

Run the following snippet in the codebase:

$query = \Drupal::database()->select('node');
$query->hasAnyTag(['foo', 'bar']);

Proposed resolution

Initialize the alterTags property with an empty array.

Remaining tasks

• Review patch
• Write a test (?)