/usr/share/php/Symfony/Bundle/TwigBundle/Resources/views/Exception/exception.json.twig is in php-symfony-twig-bundle 2.3.21+dfsg-4+deb8u3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | {{ exception.toarray|json_encode|raw }}
|