PHP Fatal error: Nesting level too deep

I have spotted a PHP fatal error in the logs for a project I'm working on:

PHP Fatal error:  Nesting level too deep - recursive dependency? in docroot/vendor/twig/twig/lib/Twig/Environment.php(403) : eval()'d code on line 136 request_id="v-8dab77ce-f84f-11e6-a484-22000b0b6021"

The problematic line is:

  eval('?>'.$content);

Has anyone else experienced the same issue, or have any idea what could be causing this? I can spend some time digging into this if anyone has some initial pointers.