Issue #2659078 by dpi: Unexpected access operation throws exception when node...

Issue #2659078 by dpi: Unexpected access operation throws exception when node grant system is active

core/modules/node/src/NodeGrantDatabaseStorage.php

@@ -65,6 +65,11 @@ public function __construct(Connection $database, ModuleHandlerInterface $module
    * {@inheritdoc}
    */
   public function access(NodeInterface $node, $operation, AccountInterface $account) {
+    // Grants only support these operations.
+    if (!in_array($operation, ['view', 'update', 'delete'])) {
+      return AccessResult::neutral();
+    }
+
     // If no module implements the hook or the node does not have an id there is
     // no point in querying the database for access grants.
     if (!$this->moduleHandler->getImplementations('node_grants') || !$node->id()) {

core/modules/node/src/Tests/NodeAccessGrantsTest.php

@@ -26,4 +26,13 @@ class NodeAccessGrantsTest extends NodeAccessTest {
    */
   public static $modules = array('node_access_test_empty');
 
+  /**
+   * Test operations not supported by node grants.
+   */
+  function testUnsupportedOperation() {
+    $web_user = $this->drupalCreateUser(['access content']);
+    $node = $this->drupalCreateNode();
+    $this->assertNodeAccess(['random_operation' => FALSE], $node, $web_user);
+  }
+
 }