Template rendering errors are incorrectly blamed on base template

[oTree-org]

Repro steps:

• create a "base.html"
• create a "child.html" that inherits from base.html with {% extends %}

put one of the following lines child.html:

{% url 'nonexistent' %}
{% include 'nonexistent.html' %}

Expected: the yellow error page's "template debug" context should highlight the offending line, as it does when you have a TemplateSyntaxError during compilation.

Actual: the error page incorrectly blames base.html, and says the error is at line 0:

"Error during template rendering
In template ...\base.html, error at line 0"

It then shows the first 10 lines of base.html, but of course there is no error there.

I think this is caused by django.template.base.Node.render_annotated, specifically this line:

e.template_debug = context.render_context.template.get_exception_info(e, self.token)

It seems fixed if I change it to:

e.template_debug = context.template.get_exception_info(e, self.token)

(I got the idea because I saw context.template referenced on the previous line.)

You can run the attached project which reproduces the issue (run server and open to /).

[oTree-org]

I found this related bug: https://code.djangoproject.com/ticket/27584

It seems that if the line is written the other way, it conceals problems in the *parent* template.

[oTree-org]

Furthermore, it seems that if template C extends B, which extends A, then errors in B will not be pinpointed correctly in either case (whether using context or context.render_context).

[Tim Graham]

Duplicate of #28935.