Cannot refer to a variable named `self` that was set in an enclosing context

[mwchase]

I hit this bug in two different ways, and I don't know if they have separate fixes or not.

The easy reproduction is, even accounting for the lack of positional-only arguments, passing a variable named self to Template.render does not work.
The more involved reproduction is, if there is a variable named self in some context, (I encountered this in a macro, but presumably {% set self = "whatever" %} would also work), then unlike other names, it is not visible in an {% include "blah" %}.

import jinja2


ENVIRONMENT = jinja2.Environment(loader=jinja2.BaseLoader())

WORKING_TEMPLATE = ENVIRONMENT.from_string("{{ self_ }}")
BROKEN_TEMPLATE = ENVIRONMENT.from_string("{{ self }}")

print("Works:", WORKING_TEMPLATE.render({"self_": ":)"}))
print("Doesn't work:", BROKEN_TEMPLATE.render({"self": ":("}))

Output with Jinja2==3.1.4:

Works: :)
Doesn't work: <TemplateReference None>

Expected output:

Works: :)
Doesn't work: :(

Environment:

• Python version: Python 3.12.3
• Jinja version: 3.1.4