nicxvan
--- a/core/lib/Drupal/Core/Hook/HookOrder.php
+++ b/core/lib/Drupal/Core/Hook/HookOrder.php
   *   TRUE for before/first, FALSE for after/last. Larger priority listeners
   *   fire first.
   * @param array|null $others
-   *   Other hook implementations to compare to, if any. The array is keyed by
-   *   string containing a class and method separated by ::, the value is not
-   *   used.
+   *   Other hook implementations to compare to, if any. The array is an
+   *   alternating list of class and method names.
   *
   * @return void
   */
  protected static function changePriority(ContainerBuilder $container, string $hook, string $class_and_method, bool $should_be_larger, ?array $others = NULL): void {
+    if (isset($others)) {
+      $mapped = [];
+      for ($i = 0; $i < count($others); $i += 2) {
+        $mapped[$others[$i] . '::' . $others[$i + 1]] = TRUE;