Tab options form cannot be submitted

index 07423cb..b6f56af 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.php

--- a/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.phpundefined

+++ b/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.phpundefined
@@ -811,13 +811,20 @@ public function usesFields() {

@@ -811,13 +811,20 @@ public function usesFields() {
   public function getPlugin($type) {
     // Look up the plugin name to use for this instance.
     $options = $this->getOption($type);
-    $name = $options['type'];
+
+    // Return now if no options have been loaded.
+    if (empty($options) || !isset($options['type'])) {
+      return;
+    }
 
     // Query plugins allow specifying a specific query class per base table.
     if ($type == 'query') {
       $views_data = Views::viewsData()->get($this->view->storage->get('base_table'));
       $name = isset($views_data['table']['base']['query_id']) ? $views_data['table']['base']['query_id'] : 'views_query';
     }
+    else {
+      $name = $options['type'];

Some dedicated test here could help.

+++ b/core/modules/views_ui/lib/Drupal/views_ui/Tests/DisplayPath.phpundefined
@@ -55,4 +55,31 @@ public function testDeleteWithNoPath() {
+    $this->drupalPost("admin/structure/views/nojs/display/test_view/page_1/path", array('path' => $this->randomString()), t('Apply'));

Nitpick ... this should use single quotes ...

Great! I assume it will be green.

+++ b/core/modules/views/lib/Drupal/views/Tests/Plugin/DisplayUnitTest.phpundefined
@@ -87,7 +93,35 @@ public function testDefaultOptions() {
+    // Get a plugin twice, and make sure the same instance is returned.
+    $view->destroy();
+    $view->initDisplay();
+    $first = spl_object_hash($display_handler->getPlugin('style'));
+    $second = spl_object_hash($display_handler->getPlugin('style'));
+    $this->assertIdentical($first, $second, 'A cached plugin instance was returned.');

The assertion message here does not seem correct...

The new assertion message looks fine.

Committed 4b815b3 and pushed to 8.x. Thanks!