id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
22348	templates that extend admin/change_form throw difficult-to-track error	django@…	nobody	"The following template runs fine;

{% extends ""admin/change_form.html"" %}
{% block breadcrumbs %}
{% endblock %}

{% block content %}
Blah
{% endblock %}


However omitting the breadcrumbs block should be valid - you will just get the breadcrumbs block from the parent;

{% extends ""admin/change_form.html"" %}

{% block content %}
Blah
{% endblock %}


however this throws a difficult to trace error;

NoReverseMatch at /admin/membership/reports/company/membershippaid/
Reverse for 'app_list' with arguments '()' and keyword arguments '{u'app_label': ''}' not found. 1 pattern(s) tried: [u'admin/(?P<app_label>\\w+)/$']

The admin/change_form.html template contains this;
{% url 'admin:app_list' app_label=opts.app_label %}
which i think is the code generating the error due to opts being empty.

It is possible that my system (upgraded from 1.2.3) is causing opts to be blank - not sure how to test this, however putting [{{ opts }}] into the template shows that opts is empty.

"	Uncategorized	closed	Template system	1.6	Normal	needsinfo	template extends admin change_form		Unreviewed	0	0	0	0	0	0