[Bug 2275074] New: python-flask fails to build with Python 3.13: test_no_escaping: AssertionError: b'&lt;p&gt;Hello World!' != b'<p>Hello World!'

https://bugzilla.redhat.com/show_bug.cgi?id=2275074

Bug ID: 2275074
           Summary: python-flask fails to build with Python 3.13:
                    test_no_escaping: AssertionError: b'<p>Hello
                    World!' != b'<p>Hello World!'
           Product: Fedora
           Version: rawhide
            Status: NEW
         Component: python-flask
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail], [e-mail],
                    [e-mail],
                    [e-mail], [e-mail]
            Blocks: 2244836 (PYTHON3.13)
  Target Milestone: ---
    Classification: Fedora

python-flask fails to build with Python 3.13.0a6.

=================================== FAILURES
===================================
_______________________________ test_no_escaping
_______________________________

app = <Flask 'flask_test'>, client = <FlaskClient <Flask 'flask_test'>>

def test_no_escaping(app, client):
        text = "<p>Hello World!"

@app.route("/")
        def index():
            return flask.render_template(
                "non_escaping_template.txt", text=text, html=Markup(text)
            )

lines = client.get("/").data.splitlines()
>   assert lines == [

b"<p>Hello World!",
            b"<p>Hello World!",
            b"<p>Hello World!",
            b"<p>Hello World!",
            b"&lt;p&gt;Hello World!",
            b"<p>Hello World!",
            b"<p>Hello World!",
            b"<p>Hello World!",
        ]
E       AssertionError: assert [b'<p>Hello W... World!', ...] == [b'<p>Hello
W... World!', ...]
E         At index 6 diff: b'&lt;p&gt;Hello World!' != b'<p>Hello World!'
E         Use -v to get more diff

tests/test_templating.py:101: AssertionError
=========================== short test summary info
============================
FAILED tests/test_templating.py::test_no_escaping - AssertionError: assert
[b...
=================== 1 failed, 481 passed, 2 skipped in 1.43s
===================

https://docs.python.org/3.13/whatsnew/3.13.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.13/fedora-ra...

For all our attempts to build python-flask with Python 3.13, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/package/python-f...

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package
builds with Python 3.13:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/

Let us know here if you have any questions.

Python 3.13 is planned to be included in Fedora 41.
To make that update smoother, we're building Fedora packages with all
pre-releases of Python 3.13.
A build failure prevents us from testing all dependent packages (transitive
[Build]Requires),
so if this package is required a lot, it's important for us to get it fixed
soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work
around it on our side.

Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=2244836
[Bug 2244836] Python 3.13

[Bug 2275074] python-flask fails to build with Python 3.13: test_no_escaping: AssertionError: b'&lt;p&gt;Hello World!' != b'<p>Hello World!'

https://bugzilla.redhat.com/show_bug.cgi?id=2275074

František Zatloukal  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |CLOSED
         Resolution|---                         |NOTABUG
        Last Closed|                            |2024-05-30 09:06:10

--- Comment #1 from František Zatloukal  ---
It seems the flask builds are passing just fine with python 3.13 as per:
https://copr.fedorainfracloud.org/coprs/g/python/python3.13/package/python-f...

It probably got resolved by a newer 3.13 snapshot and/or update of some library
required for flask tests.

Closing, feel free to reopen if the issue occurs again.