Closed
Description
Symfony version(s) affected: 4.4.4
Description
How to reproduce
<?php
require __DIR__ . '/vendor/autoload.php';
$data = [
'item' => [
'@attr' => null,
],
];
$encoder = new \Symfony\Component\Serializer\Encoder\XmlEncoder('some-context');
echo $encoder->encode($data, 'xml', ['xml_format_output' => true]);
Possible Solution
Add a null check here