@@ -55,7 +55,8 @@ public function __construct(SerializerInterface $serializer, $format, ErrorRende
5555 */
5656public function render (\Throwable $ exceptionFlattenException
5757 {
58- $ headers
58+ $ headers'Vary ' =>'Accept ' ];
59+
5960$ debug\is_bool ($ this debug ) ?$ this debug : ($ this debug )($ exception
6061if ($ debug
6162$ headers'X-Debug-Exception ' ] =rawurlencode ($ exceptiongetMessage ());
@@ -66,19 +67,17 @@ public function render(\Throwable $exception): FlattenException
6667
6768try {
6869$ format\is_string ($ this format ) ?$ this format : ($ this format )($ flattenException
69- $ headers
70- 'Content-Type ' => Request::getMimeTypes ($ format0 ] ??$ format
71- 'Vary ' =>'Accept ' ,
72- ];
70+ $ headers'Content-Type ' ] = Request::getMimeTypes ($ format0 ] ??$ format
7371
74- return $ flattenExceptionsetAsString ($ this serializer ->serialize ($ flattenException$ format
72+ $ flattenExceptionsetAsString ($ this serializer ->serialize ($ flattenException$ format
7573'exception ' =>$ exception
7674'debug ' =>$ debug
77- ]))
78- ->setHeaders ($ flattenExceptiongetHeaders () +$ headers
75+ ]));
7976 }catch (NotEncodableValueException $ e
80- return $ this fallbackErrorRenderer ->render ($ exception
77+ $ flattenException = $ this fallbackErrorRenderer ->render ($ exception
8178 }
79+
80+ return $ flattenExceptionsetHeaders ($ flattenExceptiongetHeaders () +$ headers
8281 }
8382
8483public static function getPreferredFormat (RequestStack $ requestStack\Closure