diff --git a/core/lib/Drupal/Core/Entity/EntityAccessController.php b/core/lib/Drupal/Core/Entity/EntityAccessController.php
index 164b83e..4658d50 100644
--- a/core/lib/Drupal/Core/Entity/EntityAccessController.php
+++ b/core/lib/Drupal/Core/Entity/EntityAccessController.php
@@ -58,7 +58,7 @@ public function access(EntityInterface $entity, $operation, $langcode = Language
     // We grant access to the entity if both of these conditions are met:
     // - No modules say to deny access.
     // - At least one module says to grant access.
-    $access = module_invoke_all($entity->entityType() . '_access', $entity->getBCEntity(), $operation, $account, $langcode);
+    $access = module_invoke_all($entity->entityType() . '_access', $entity, $operation, $account, $langcode);
 
     if (($return = $this->processAccessHookResults($access)) === NULL) {
       // No module had an opinion about the access, so let's the access
diff --git a/core/lib/Drupal/Core/Entity/EntityFormController.php b/core/lib/Drupal/Core/Entity/EntityFormController.php
index ceb09de..e148048 100644
--- a/core/lib/Drupal/Core/Entity/EntityFormController.php
+++ b/core/lib/Drupal/Core/Entity/EntityFormController.php
@@ -506,9 +506,7 @@ public function getEntity() {
    */
   protected function getTranslatedEntity(array $form_state) {
     $langcode = $this->getFormLangcode($form_state);
-    $translation = $this->entity->getTranslation($langcode);
-    // Ensure that the entity object is a BC entity if the original one is.
-    return $this->entity instanceof EntityBCDecorator ? $translation->getBCEntity() : $translation;
+    return $this->entity->getTranslation($langcode);
   }
 
   /**
diff --git a/core/modules/forum/forum.module b/core/modules/forum/forum.module
index f552c04..3c37450 100644
--- a/core/modules/forum/forum.module
+++ b/core/modules/forum/forum.module
@@ -1127,7 +1127,12 @@ function template_preprocess_forum_topic_list(&$variables) {
         $variables['topics'][$id]->title_link = l($topic->label(), 'node/' . $topic->id());
         $variables['topics'][$id]->message = '';
       }
-      $variables['topics'][$id]->submitted = theme('forum_submitted', array('topic' => $topic));
+      $submitted_topic = (object) array(
+        'uid' => $topic->getAuthorId(),
+        'name' => $topic->getAuthor()->getUsername(),
+        'created' => $topic->getCreatedTime(),
+      );
+      $variables['topics'][$id]->submitted = theme('forum_submitted', array('topic' => $submitted_topic));
       $variables['topics'][$id]->last_reply = theme('forum_submitted', array('topic' => isset($topic->last_reply) ? $topic->last_reply : NULL));
 
       $variables['topics'][$id]->new_text = '';
diff --git a/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php b/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php
index f9d701f..efbcf3b 100644
--- a/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php
+++ b/core/modules/node/lib/Drupal/node/Plugin/Core/Entity/Node.php
@@ -116,7 +116,7 @@ public function postSave(EntityStorageControllerInterface $storage_controller, $
     // default revision. There's no need to delete existing records if the node
     // is new.
     if ($this->isDefaultRevision()) {
-      \Drupal::entityManager()->getAccessController('node')->writeGrants($this->getBCEntity(), $update);
+      \Drupal::entityManager()->getAccessController('node')->writeGrants($this, $update);
     }
   }
 
diff --git a/core/modules/node/node.api.php b/core/modules/node/node.api.php
index f9b2f89..9caba58 100644
--- a/core/modules/node/node.api.php
+++ b/core/modules/node/node.api.php
@@ -260,7 +260,7 @@ function hook_node_grants($account, $op) {
 function hook_node_access_records(\Drupal\node\NodeInterface $node) {
   // We only care about the node if it has been marked private. If not, it is
   // treated just like any other node and we completely ignore it.
-  if ($node->private) {
+  if ($node->private->value) {
     $grants = array();
     // Only published Catalan translations of private nodes should be viewable
     // to all users. If we fail to check $node->isPublished(), all users would be able
diff --git a/core/modules/node/tests/modules/node_access_test/node_access_test.module b/core/modules/node/tests/modules/node_access_test/node_access_test.module
index c200908..abc18c6 100644
--- a/core/modules/node/tests/modules/node_access_test/node_access_test.module
+++ b/core/modules/node/tests/modules/node_access_test/node_access_test.module
@@ -36,7 +36,7 @@ function node_access_test_node_grants($account, $op) {
 function node_access_test_node_access_records(NodeInterface $node) {
   $grants = array();
   // For NodeAccessBaseTableTestCase, only set records for private nodes.
-  if (!Drupal::state()->get('node_access_test.private') || $node->private) {
+  if (!Drupal::state()->get('node_access_test.private') || $node->private->value) {
     $grants[] = array(
       'realm' => 'node_access_test',
       'gid' => 8888,
@@ -78,6 +78,21 @@ function node_access_test_permission() {
 }
 
 /**
+ * Implements hook_entity_field_info().
+ */
+function node_access_test_entity_field_info($entity_type) {
+  if ($entity_type === 'node') {
+    $info['definitions']['private'] = array(
+      'type' => 'boolean_field',
+      'label' => t('Private'),
+      'computed' => TRUE,
+      'list' => TRUE,
+    );
+    return $info;
+  }
+}
+
+/**
  * Implements hook_form_BASE_FORM_ID_alter().
  */
 function node_access_test_form_node_form_alter(&$form, $form_state) {
@@ -88,7 +103,7 @@ function node_access_test_form_node_form_alter(&$form, $form_state) {
       '#type' => 'checkbox',
       '#title' => t('Private'),
       '#description' => t('Check here if this content should be set private and only shown to privileged users.'),
-      '#default_value' => isset($node->private) ? $node->private : FALSE,
+      '#default_value' => $node->private->value,
     );
   }
 }
@@ -129,12 +144,10 @@ function node_access_test_node_update(EntityInterface $node) {
  * Helper for node insert/update.
  */
 function _node_access_test_node_write(EntityInterface $node) {
-  if (isset($node->private)) {
-    db_merge('node_access_test')
-      ->key(array('nid' => $node->id()))
-      ->fields(array('private' => (int) $node->private))
-      ->execute();
-  }
+  db_merge('node_access_test')
+    ->key(array('nid' => $node->id()))
+    ->fields(array('private' => (int) $node->private->value))
+    ->execute();
 }
 
 /**
diff --git a/core/modules/translation/translation.module b/core/modules/translation/translation.module
index 672549e..7f65448 100644
--- a/core/modules/translation/translation.module
+++ b/core/modules/translation/translation.module
@@ -566,7 +566,7 @@ function translation_language_switch_links_alter(array &$links, $type, $path) {
     foreach ($links as $langcode => $link) {
       if (isset($translations[$langcode]) && $translations[$langcode]->status) {
         // Translation in a different node.
-        $nid = $translations[$langcode]->nid;
+        $nid = $translations[$langcode] instanceof EntityInterface ? $translations[$langcode]->id() : $translations[$langcode]->nid;
         $links[$langcode]['href'] = 'node/' . $nid  . $matches[2];
       }
       else {