Django ticket 20745 Rendering foo.html raises a TypeError whereas bar.html doesn't.

bar.html

{% extends 'foo.html' %}

{% block foo %}
{{ block.super }}
{% endblock %}

foo.html

{% load raise %}

{% block foo %}
{% raise 'TypeError' %}
{% endblock %}

raise.py

import builtins
from django import template

register = template.Library()

@register.simple_tag(name='raise')
def do_raise(exception_name, msg=None):
    exception_type = getattr(builtins, exception_name)
    args = (msg,) if msg is not None else ()
    raise exception_type(*args)