Merge branch '4.3' into 4.4

* 4.3:
  [Cache] Fixed undefined variable in ArrayTrait
  [HttpClient] revert bad logic around JSON_THROW_ON_ERROR
  [HttpKernel] Fix handling non-catchable fatal errors
  Fix json-encoding when JSON_THROW_ON_ERROR is used
  [HttpFoundation] work around PHP 7.3 bug related to json_encode()
  [HttpClient] add $response->cancel()
  [Security] added support for updated \"distinguished name\" format in x509 authentication

Author: nicolas-grekas

Descriptor/JsonDescriptor.php

@@ -97,7 +97,9 @@ protected function describeApplication(Application $application, array $options
      */
     private function writeData(array $data, array $options)
     {
-        $this->write(json_encode($data, isset($options['json_encoding']) ? $options['json_encoding'] : 0));
+        $flags = isset($options['json_encoding']) ? $options['json_encoding'] : 0;
+
+        $this->write(json_encode($data, $flags));
     }
 
     /**