--- 2786577-102.patch	2017-03-29 16:20:06.204719093 +0200
+++ 2786577-106.patch	2017-03-29 19:51:42.237137645 +0200
@@ -200,6 +200,9 @@
 +
 +            // Get field config.
 +            $sort_views_data = \Drupal\views\Views::viewsData()->get($sort['table'])[$sort['field']]['sort'];
++            if (!isset($sort_views_data['entity_type']) || !isset($sort_views_data['field_name'])) {
++              continue;
++            }
 +            $field_storage_name = 'field.storage.' . $sort_views_data['entity_type'] . '.' . $sort_views_data['field_name'];
 +            $field_configuration = $config_factory->get($field_storage_name);
 +
@@ -288,7 +291,8 @@
 +   */
 +  protected function setDatabaseDumpFiles() {
 +    $this->databaseDumpFiles = [
-+      __DIR__ . '/../../../tests/fixtures/update/datetime_range-filter-values.php.gz',
++      __DIR__ . '/../../../../system/tests/fixtures/update/drupal-8.bare.standard.php.gz',
++      __DIR__ . '/../../../tests/fixtures/update/datetime_range-filter-values.php',
 +    ];
 +  }
 +