running pytest
/usr/lib/python3.10/site-packages/setuptools/command/easy_install.py:156: EasyInstallDeprecationWarning: easy_install command is deprecated. Use build and pip and other standards-based tools.
  warnings.warn(
/usr/lib/python3.10/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
  warnings.warn(
Searching for mistune
Reading https://pypi.org/simple/mistune/
/usr/lib/python3.10/site-packages/pkg_resources/__init__.py:116: PkgResourcesDeprecationWarning:  is an invalid version and will not be supported in a future release
  warnings.warn(
Downloading https://files.pythonhosted.org/packages/55/12/b6cf3319d5bc5bf0526b93c7e25e8a9a5b0f925345f9aff9160191f32c39/mistune-2.0.1-py2.py3-none-any.whl#sha256=6361adbdd2763cd7a31ce53b5f127b762ac543b72f3891f8465f418a1456be59
Best match: mistune 2.0.1
Processing mistune-2.0.1-py2.py3-none-any.whl
Installing mistune-2.0.1-py2.py3-none-any.whl to /build/m2r/src/m2r-0.2.1/.eggs

Installed /build/m2r/src/m2r-0.2.1/.eggs/mistune-2.0.1-py3.10.egg
running egg_info
writing m2r.egg-info/PKG-INFO
writing dependency_links to m2r.egg-info/dependency_links.txt
writing entry points to m2r.egg-info/entry_points.txt
writing requirements to m2r.egg-info/requires.txt
writing top-level names to m2r.egg-info/top_level.txt
reading manifest file 'm2r.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no previously-included files matching '__pycache__' found under directory '*'
warning: no previously-included files matching '*.py[co]' found under directory '*'
adding license file 'LICENSE'
writing manifest file 'm2r.egg-info/SOURCES.txt'
running build_ext
============================= test session starts ==============================
platform linux -- Python 3.10.1, pytest-6.2.5, py-1.11.0, pluggy-0.13.1
rootdir: /build/m2r/src/m2r-0.2.1
collected 0 items / 2 errors

==================================== ERRORS ====================================
______________________ ERROR collecting tests/test_cli.py ______________________
tests/test_cli.py:13: in <module>
    from m2r import parse_from_file, main, options
m2r.py:59: in <module>
    class RestBlockGrammar(mistune.BlockGrammar):
E   AttributeError: module 'mistune' has no attribute 'BlockGrammar'
___________________ ERROR collecting tests/test_renderer.py ____________________
tests/test_renderer.py:11: in <module>
    from m2r import prolog, convert
m2r.py:59: in <module>
    class RestBlockGrammar(mistune.BlockGrammar):
E   AttributeError: module 'mistune' has no attribute 'BlockGrammar'
=============================== warnings summary ===============================
tests/test_renderer.py:80
  /build/m2r/src/m2r-0.2.1/tests/test_renderer.py:80: DeprecationWarning: invalid escape sequence '\ '
    prolog + '\nabc def\ :raw-html-m2r:`<br>`\nghi' + '\n',

tests/test_renderer.py:247
  /build/m2r/src/m2r-0.2.1/tests/test_renderer.py:247: DeprecationWarning: invalid escape sequence '\ '
    '\na co:\ ``de`` and `RefLink <http://example.com>`_ here.\n',

tests/test_renderer.py:255
  /build/m2r/src/m2r-0.2.1/tests/test_renderer.py:255: DeprecationWarning: invalid escape sequence '\ '
    '\na `RefLink <http://example.com>`_ and co:\ ``de`` here.\n',

tests/test_renderer.py:707
  /build/m2r/src/m2r-0.2.1/tests/test_renderer.py:707: DeprecationWarning: invalid escape sequence '\ '
    'This is a\ [#fn-1]_ '

tests/test_renderer.py:708
  /build/m2r/src/m2r-0.2.1/tests/test_renderer.py:708: DeprecationWarning: invalid escape sequence '\ '
    'footnote\ [#fn-2]_ ref\ [#fn-ref]_ with rst [#a]_.',

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================== short test summary info ============================
ERROR tests/test_cli.py - AttributeError: module 'mistune' has no attribute '...
ERROR tests/test_renderer.py - AttributeError: module 'mistune' has no attrib...
!!!!!!!!!!!!!!!!!!! Interrupted: 2 errors during collection !!!!!!!!!!!!!!!!!!!!
======================== 5 warnings, 2 errors in 0.99s =========================
==> ERROR: A failure occurred in check().
    Aborting...