python-flask fails to build with Python 3.11.0a7.

=================================== FAILURES ===================================
_______________________________ test_flaskgroup ________________________________

runner = <click.testing.CliRunner object at 0x7fc24651f690>

    def test_flaskgroup(runner):
        def create_app():
            return Flask("flaskgroup")
    
        @click.group(cls=FlaskGroup, create_app=create_app)
        def cli(**params):
            pass
    
        @cli.command()
        def test():
            click.echo(current_app.name)
    
        result = runner.invoke(cli, ["test"])
>       assert result.exit_code == 0
E       assert 1 == 0
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:398: AssertionError
_________________________ test_flaskgroup_debug[True] __________________________

runner = <click.testing.CliRunner object at 0x7fc246ce7dd0>
set_debug_flag = True

    @pytest.mark.parametrize("set_debug_flag", (True, False))
    def test_flaskgroup_debug(runner, set_debug_flag):
        def create_app():
            app = Flask("flaskgroup")
            app.debug = True
            return app
    
        @click.group(cls=FlaskGroup, create_app=create_app, set_debug_flag=set_debug_flag)
        def cli(**params):
            pass
    
        @cli.command()
        def test():
            click.echo(str(current_app.debug))
    
        result = runner.invoke(cli, ["test"])
>       assert result.exit_code == 0
E       assert 1 == 0
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:418: AssertionError
_________________________ test_flaskgroup_debug[False] _________________________

runner = <click.testing.CliRunner object at 0x7fc246cafe50>
set_debug_flag = False

    @pytest.mark.parametrize("set_debug_flag", (True, False))
    def test_flaskgroup_debug(runner, set_debug_flag):
        def create_app():
            app = Flask("flaskgroup")
            app.debug = True
            return app
    
        @click.group(cls=FlaskGroup, create_app=create_app, set_debug_flag=set_debug_flag)
        def cli(**params):
            pass
    
        @cli.command()
        def test():
            click.echo(str(current_app.debug))
    
        result = runner.invoke(cli, ["test"])
>       assert result.exit_code == 0
E       assert 1 == 0
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:418: AssertionError
______________________ test_no_command_echo_loading_error ______________________

    def test_no_command_echo_loading_error():
        from flask.cli import cli
    
        runner = CliRunner(mix_stderr=False)
        result = runner.invoke(cli, ["missing"])
>       assert result.exit_code == 2
E       assert 1 == 2
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:427: AssertionError
_________________________ test_help_echo_loading_error _________________________

    def test_help_echo_loading_error():
        from flask.cli import cli
    
        runner = CliRunner(mix_stderr=False)
        result = runner.invoke(cli, ["--help"])
>       assert result.exit_code == 0
E       assert 1 == 0
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:437: AssertionError
___________________________ test_help_echo_exception ___________________________

    def test_help_echo_exception():
        def create_app():
            raise Exception("oh no")
    
        cli = FlaskGroup(create_app=create_app)
        runner = CliRunner(mix_stderr=False)
        result = runner.invoke(cli, ["--help"])
>       assert result.exit_code == 0
E       assert 1 == 0
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:449: AssertionError
____________________________ TestRoutes.test_simple ____________________________

self = <test_cli.TestRoutes object at 0x7fc24655a7d0>
invoke = functools.partial(<bound method CliRunner.invoke of <click.testing.CliRunner object at 0x7fc2464bfb90>>, <FlaskGroup None>)

    def test_simple(self, invoke):
        result = invoke(["routes"])
>       assert result.exit_code == 0
E       assert 1 == 0
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:493: AssertionError
_________________________ TestRoutes.test_all_methods __________________________

self = <test_cli.TestRoutes object at 0x7fc24655aa10>
invoke = functools.partial(<bound method CliRunner.invoke of <click.testing.CliRunner object at 0x7fc246713610>>, <FlaskGroup None>)

    def test_all_methods(self, invoke):
        output = invoke(["routes"]).output
        assert "GET, HEAD, OPTIONS, POST" not in output
        output = invoke(["routes", "--all-methods"]).output
>       assert "GET, HEAD, OPTIONS, POST" in output
E       AssertionError: assert 'GET, HEAD, OPTIONS, POST' in ''

tests/test_cli.py:517: AssertionError
__________________________ TestRoutes.test_no_routes ___________________________

self = <test_cli.TestRoutes object at 0x7fc246445510>
invoke_no_routes = functools.partial(<bound method CliRunner.invoke of <click.testing.CliRunner object at 0x7fc247bb0d10>>, <FlaskGroup None>)

    def test_no_routes(self, invoke_no_routes):
        result = invoke_no_routes(["routes"])
>       assert result.exit_code == 0
E       assert 1 == 0
E        +  where 1 = <Result DeprecationWarning("module 'sre_constants' is deprecated")>.exit_code

tests/test_cli.py:521: AssertionError
=========================== short test summary info ============================
FAILED tests/test_cli.py::test_flaskgroup - assert 1 == 0
FAILED tests/test_cli.py::test_flaskgroup_debug[True] - assert 1 == 0
FAILED tests/test_cli.py::test_flaskgroup_debug[False] - assert 1 == 0
FAILED tests/test_cli.py::test_no_command_echo_loading_error - assert 1 == 2
FAILED tests/test_cli.py::test_help_echo_loading_error - assert 1 == 0
FAILED tests/test_cli.py::test_help_echo_exception - assert 1 == 0
FAILED tests/test_cli.py::TestRoutes::test_simple - assert 1 == 0
FAILED tests/test_cli.py::TestRoutes::test_all_methods - AssertionError: asse...
FAILED tests/test_cli.py::TestRoutes::test_no_routes - assert 1 == 0
============= 9 failed, 445 passed, 14 skipped, 3 xpassed in 3.91s =============
error: Bad exit status from /var/tmp/rpm-tmp.QxHnVd (%check)

Undocumented modules sre_compile, sre_constants and sre_parse are now deprecated. (Contributed by Serhiy Storchaka in bpo-47152.)

https://bugs.python.org/issue?@action=redirect&bpo=47152
https://docs.python.org/3.11/whatsnew/3.11.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.11/fedora-rawhide-x86_64/04221098-python-flask/

For all our attempts to build python-flask with Python 3.11, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/package/python-flask/

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 3.11:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/

Let us know here if you have any questions.

Python 3.11 is planned to be included in Fedora 37. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.11.
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.