Update to Drupal 8.1.1. For more information, see https://www.drupal.org/node/2718713

core/lib/Drupal/Core/Config/ConfigCrudEvent.php

@@ -49,4 +49,3 @@ class ConfigCrudEvent extends Event {
   }
 
 }
-

core/lib/Drupal/Core/Config/ConfigFactory.php

@@ -272,7 +272,7 @@ class ConfigFactory implements ConfigFactoryInterface, EventSubscriberInterface
     // $this->configFactoryOverrides, add cache keys for each.
     $keys[] = 'global_overrides';
     foreach($this->configFactoryOverrides as $override) {
-      $keys[] =  $override->getCacheSuffix();
+      $keys[] = $override->getCacheSuffix();
     }
     return $keys;
   }

core/lib/Drupal/Core/Config/ConfigImporter.php

@@ -484,14 +484,17 @@ class ConfigImporter {
    */
   public function doSyncStep($sync_step, &$context) {
     if (!is_array($sync_step) && method_exists($this, $sync_step)) {
+      \Drupal::service('config.installer')->setSyncing(TRUE);
       $this->$sync_step($context);
     }
     elseif (is_callable($sync_step)) {
+      \Drupal::service('config.installer')->setSyncing(TRUE);
       call_user_func_array($sync_step, array(&$context, $this));
     }
     else {
       throw new \InvalidArgumentException('Invalid configuration synchronization step');
     }
+    \Drupal::service('config.installer')->setSyncing(FALSE);
   }
 
   /**
@@ -778,7 +781,6 @@ class ConfigImporter {
     // Set the config installer to use the sync directory instead of the
     // extensions own default config directories.
     \Drupal::service('config.installer')
-      ->setSyncing(TRUE)
       ->setSourceStorage($this->storageComparer->getSourceStorage());
     if ($type == 'module') {
       $this->moduleInstaller->$op(array($name), FALSE);
@@ -805,8 +807,6 @@ class ConfigImporter {
     }
 
     $this->setProcessedExtension($type, $op, $name);
-    \Drupal::service('config.installer')
-      ->setSyncing(FALSE);
   }
 
   /**

core/lib/Drupal/Core/Config/ConfigModuleOverridesEvent.php

@@ -100,4 +100,3 @@ class ConfigModuleOverridesEvent extends Event {
     return $this;
   }
 }
-

core/lib/Drupal/Core/Config/Entity/ConfigDependencyManager.php

@@ -17,10 +17,10 @@ use Drupal\Component\Utility\SortArray;
  * The configuration dependency value is structured like this:
  * @code
  * array(
- *   'config => array(
+ *   'config' => array(
  *     // An array of configuration entity object names. Recalculated on save.
  *   ),
- *   'content => array(
+ *   'content' => array(
  *     // An array of content entity configuration dependency names. The default
  *     // format is "ENTITY_TYPE_ID:BUNDLE:UUID". Recalculated on save.
  *   ),
@@ -165,7 +165,7 @@ class ConfigDependencyManager {
       // If checking content, module, or theme dependencies, discover which
       // entities are dependent on the entities that have a direct dependency.
       foreach ($dependent_entities as $entity) {
-        $entities_to_check[] =  $entity->getConfigDependencyName();
+        $entities_to_check[] = $entity->getConfigDependencyName();
       }
     }
     $dependencies = array_merge($this->createGraphConfigEntityDependencies($entities_to_check), $dependent_entities);
@@ -291,10 +291,10 @@ class ConfigDependencyManager {
    *   The configuration dependencies. The array is structured like this:
    *   @code
    *   array(
-   *     'config => array(
+   *     'config' => array(
    *       // An array of configuration entity object names.
    *     ),
-   *     'content => array(
+   *     'content' => array(
    *       // An array of content entity configuration dependency names. The default
    *       // format is "ENTITY_TYPE_ID:BUNDLE:UUID".
    *     ),

core/lib/Drupal/Core/Config/Entity/ConfigEntityStorage.php

@@ -382,8 +382,7 @@ class ConfigEntityStorage extends EntityStorageBase implements ConfigEntityStora
    * {@inheritdoc}
    */
   public function importCreate($name, Config $new_config, Config $old_config) {
-    $entity = $this->createFromStorageRecord($new_config->get());
-    $entity->setSyncing(TRUE);
+    $entity = $this->_doCreateFromStorageRecord($new_config->get(), TRUE);
     $entity->save();
     return TRUE;
   }
@@ -425,6 +424,27 @@ class ConfigEntityStorage extends EntityStorageBase implements ConfigEntityStora
    * {@inheritdoc}
    */
   public function createFromStorageRecord(array $values) {
+    return $this->_doCreateFromStorageRecord($values);
+  }
+
+  /**
+   * Helps create a configuration entity from storage values.
+   *
+   * Allows the configuration entity storage to massage storage values before
+   * creating an entity.
+   *
+   * @param array $values
+   *   The array of values from the configuration storage.
+   * @param bool $is_syncing
+   *   Is the configuration entity being created as part of a config sync.
+   *
+   * @return ConfigEntityInterface
+   *   The configuration entity.
+   *
+   * @see \Drupal\Core\Config\Entity\ConfigEntityStorageInterface::createFromStorageRecord()
+   * @see \Drupal\Core\Config\Entity\ImportableEntityStorageInterface::importCreate()
+   */
+  protected function _doCreateFromStorageRecord(array $values, $is_syncing = FALSE) {
     // Assign a new UUID if there is none yet.
     if ($this->uuidKey && $this->uuidService && !isset($values[$this->uuidKey])) {
       $values[$this->uuidKey] = $this->uuidService->generate();
@@ -432,6 +452,7 @@ class ConfigEntityStorage extends EntityStorageBase implements ConfigEntityStora
     $data = $this->mapFromStorageRecords(array($values));
     $entity = current($data);
     $entity->original = clone $entity;
+    $entity->setSyncing($is_syncing);
     $entity->enforceIsNew();
     $entity->postCreate($this);
 
@@ -439,6 +460,7 @@ class ConfigEntityStorage extends EntityStorageBase implements ConfigEntityStora
     // entity object, for instance to fill-in default values.
     $this->invokeHook('create', $entity);
     return $entity;
+
   }
 
   /**

core/lib/Drupal/Core/Config/ExtensionInstallStorage.php

@@ -132,4 +132,3 @@ class ExtensionInstallStorage extends InstallStorage {
     return $this->folders;
   }
 }
-

core/lib/Drupal/Core/Config/StorableConfigBase.php

@@ -60,13 +60,13 @@ abstract class StorableConfigBase extends ConfigBase {
   /**
    * Saves the configuration object.
    *
+   * Must invalidate the cache tags associated with the configuration object.
+   *
    * @param bool $has_trusted_data
    *   Set to TRUE if the configuration data has already been checked to ensure
    *   it conforms to schema. Generally this is only used during module and
    *   theme installation.
    *
-   * Must invalidate the cache tags associated with the configuration object.
-   *
    * @return $this
    *
    * @see \Drupal\Core\Config\ConfigInstaller::createConfiguration()
@@ -191,7 +191,7 @@ abstract class StorableConfigBase extends ConfigBase {
         // we have to special case the meaning of an empty string for numeric
         // types. In PHP this would be casted to a 0 but for the purposes of
         // configuration we need to treat this as a NULL.
-        $empty_value =  $value === '' && ($element instanceof IntegerInterface || $element instanceof FloatInterface);
+        $empty_value = $value === '' && ($element instanceof IntegerInterface || $element instanceof FloatInterface);
 
         if ($value === NULL || $empty_value) {
           $value = NULL;