Issue #3524897: Dependency from core block plugin to block module

Closes #3524897

core/lib/Drupal/Core/Block/Plugin/Block/Broken.php

@@ -67,7 +67,7 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function build() {
     $build = [];
-    if ($this->currentUser->hasPermission('administer blocks')) {
+    if ($this->currentUser->hasPermission('view diagnostic messages') || $this->currentUser->hasPermission('administer blocks')) {
       $build += $this->brokenMessage();
     }
     return $build;