Django Templating: Variable named 'new' behaves unexpectedly

some_buggy_template.html

<p>
    {% if not_new %}
        {{not_new}}
    {% endif %}
<p>

some_template.html

<p>
    {% if new %}
        {{new}}
    {% endif %}
</p>

template_new_bug.py

from django.template import loader, Context

# This one works as expected
template = loader.get_template('some_template.html')
context = Context({})
body = template.render(context)
# body now is: <p></p>

# This one does not work as expected.
buggy_template = loader.get_template('some_buggy_template.html')
buggy_context = Context({})
buggy_body = template.render(buggy_context)
# buggy_body now is: <p>[{}]</p>