TOPs ohne Name scheitern erst in escape_tex
https://sentry.fsmpi.rwth-aachen.de/protokollsystem/protokollsystem/issues/14/
TypeError: object of type 'NoneType' has no len()
(7 additional frame(s) were not displayed)
...
File "jinja2/environment.py", line 780, in handle_exception
reraise(exc_type, exc_value, tb)
File "jinja2/_compat.py", line 37, in reraise
raise value.with_traceback(tb)
File "/var/www/protokollsystem/program/templates/protocol-template.txt", line 45, in top-level template code
{{render_top(top, use_description=True)}}
File "jinja2/runtime.py", line 579, in _invoke
rv = self._func(*arguments)
File "/var/www/protokollsystem/program/templates/protocol-template.txt", line 25, in template
{% if top.description|length > 0 %}
TypeError: object of type 'NoneType' has no len()