Update to Drupal 8.1.2. For more information, see https://www.drupal.org/project/drupal/releases/8.1.2

core/modules/aggregator/src/Form/OpmlFeedAdd.php

@@ -99,8 +99,8 @@ class OpmlFeedAdd extends FormBase {
    */
   public function validateForm(array &$form, FormStateInterface $form_state) {
     // If both fields are empty or filled, cancel.
-    $file_upload = $this->getRequest()->files->get('files[upload]', NULL, TRUE);
-    if ($form_state->isValueEmpty('remote') == empty($file_upload)) {
+    $all_files = $this->getRequest()->files->get('files', []);
+    if ($form_state->isValueEmpty('remote') == empty($all_files['upload'])) {
       $form_state->setErrorByName('remote', $this->t('<em>Either</em> upload a file or enter a URL.'));
     }
   }

core/modules/aggregator/src/ItemInterface.php

@@ -141,4 +141,5 @@ interface ItemInterface extends ContentEntityInterface {
    *   The called feed item entity.
    */
   public function setGuid($guid);
+
 }

core/modules/aggregator/src/Plugin/Field/FieldFormatter/AggregatorXSSFormatter.php

@@ -35,4 +35,5 @@ class AggregatorXSSFormatter extends FormatterBase {
     }
     return $elements;
   }
+
 }

core/modules/aggregator/src/Plugin/aggregator/fetcher/DefaultFetcher.php

@@ -117,4 +117,5 @@ class DefaultFetcher implements FetcherInterface, ContainerFactoryPluginInterfac
       return FALSE;
     }
   }
+
 }

core/modules/aggregator/src/Tests/AddFeedTest.php

@@ -91,4 +91,5 @@ class AddFeedTest extends AggregatorTestBase {
     $this->deleteFeed($feed);
     $this->deleteFeed($feed_2);
   }
+
 }

core/modules/aggregator/src/Tests/AggregatorAdminTest.php

@@ -80,4 +80,5 @@ class AggregatorAdminTest extends AggregatorTestBase {
     $count = $this->container->get('entity.manager')->getStorage('aggregator_item')->getItemCount($feed);
     $this->assertEqual(\Drupal::translation()->formatPlural($count, '1 item', '@count items'), (string) $result[0]->td[1]);
   }
+
 }

core/modules/aggregator/src/Tests/AggregatorCronTest.php

@@ -41,4 +41,5 @@ class AggregatorCronTest extends AggregatorTestBase {
     $this->cronRun();
     $this->assertEqual(5, db_query('SELECT COUNT(*) FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $feed->id()))->fetchField());
   }
+
 }

core/modules/aggregator/src/Tests/AggregatorTestBase.php

@@ -370,4 +370,5 @@ EOF;
       ))
       ->save();
   }
+
 }

core/modules/aggregator/src/Tests/DeleteFeedItemTest.php

@@ -36,4 +36,5 @@ class DeleteFeedItemTest extends AggregatorTestBase {
       $this->deleteFeed($feed);
     }
   }
+
 }

core/modules/aggregator/src/Tests/FeedAdminDisplayTest.php

@@ -59,4 +59,5 @@ class FeedAdminDisplayTest extends AggregatorTestBase {
     $this->assertText('ago', 'The non scheduled feed has been updated. It shows "x x ago" as last update.');
     $this->assertNoText('left', 'The feed is not scheduled. It does not show a timeframe "x x left" for next update.');
   }
+
 }

core/modules/aggregator/src/Tests/FeedFetcherPluginTest.php

@@ -40,4 +40,5 @@ class FeedFetcherPluginTest extends AggregatorTestBase {
     // Fetch should fail due to feed name.
     $this->assertTrue(empty($feed->items));
   }
+
 }

core/modules/aggregator/src/Tests/FeedLanguageTest.php

@@ -81,4 +81,5 @@ class FeedLanguageTest extends AggregatorTestBase {
       }
     }
   }
+
 }

core/modules/aggregator/src/Tests/FeedParserTest.php

@@ -107,4 +107,5 @@ class FeedParserTest extends AggregatorTestBase {
     $this->clickLink(t('Update items'));
     $this->assertRaw(t('The feed from %title seems to be broken because of error', array('%title' => $feed->label())));
   }
+
 }

core/modules/aggregator/src/Tests/FeedProcessorPluginTest.php

@@ -63,4 +63,5 @@ class FeedProcessorPluginTest extends AggregatorTestBase {
     // Make sure its refresh rate doubled.
     $this->assertEqual($feed->getRefreshRate(), 3600);
   }
+
 }

core/modules/aggregator/src/Tests/ImportOpmlTest.php

@@ -120,4 +120,5 @@ class ImportOpmlTest extends AggregatorTestBase {
     $this->validateImportFormFields();
     $this->submitImportForm();
   }
+
 }

core/modules/aggregator/src/Tests/UpdateFeedItemTest.php

@@ -66,4 +66,5 @@ class UpdateFeedItemTest extends AggregatorTestBase {
     $this->updateFeedItems($feed);
     $this->assertResponse(200);
   }
+
 }

core/modules/aggregator/src/Tests/UpdateFeedTest.php

@@ -42,4 +42,5 @@ class UpdateFeedTest extends AggregatorTestBase {
       $this->deleteFeed($feed);
     }
   }
+
 }