Python nightly tests fail: "InvalidVersion: Invalid version: '3.12.0a4+'"

[nedbat]

The nightly builds started failing Feb 10 2023, 2:28am. This is the 3.12 build, but 3.10 and 3.11 failed with similar messages:

_________________________ EnvironmentTest.test_bug_862 _________________________
  [gw0] linux -- Python 3.12.0 /home/runner/work/coveragepy/coveragepy/.tox/py312/bin/python
  
  self = <tests.test_process.EnvironmentTest object at 0x7f387912bb00>
  
      @pytest.mark.skipif(env.WINDOWS, reason="Windows can't make symlinks")
      def test_bug_862(self) -> None:
          # This simulates how pyenv and pyenv-virtualenv end up creating the
          # coverage executable.
          self.make_file("elsewhere/bin/fake-coverage", """\
              #!{executable}
              import sys, pkg_resources
              sys.exit(pkg_resources.load_entry_point('coverage', 'console_scripts', 'coverage')())
              """.format(executable=sys.executable))
          os.chmod("elsewhere/bin/fake-coverage", stat.S_IREAD | stat.S_IEXEC)
          os.symlink("elsewhere", "somewhere")
          self.make_file("foo.py", "print('inside foo')")
          self.make_file("bar.py", "import foo")
          out = self.run_command("somewhere/bin/fake-coverage run bar.py")
  >       assert "inside foo\n" == out
  E       assert 'inside foo\n' == "Traceback (m...'3.12.0a4+'\n"
  E         + inside foo
  E         - Traceback (most recent call last):
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 3030, in _dep_map
  E         -     return self.__dep_map
  E         -            ^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 2826, in __getattr__
  E         -     raise AttributeError(attr)
  E         - AttributeError: _DistInfoDistribution__dep_map
  E         - 
  E         - During handling of the above exception, another exception occurred:
  E         - 
  E         - Traceback (most recent call last):
  E         -   File "/tmp/pytest-of-runner/pytest-0/popen-gw0/t348/somewhere/bin/fake-coverage", line 3, in <module>
  E         -     sys.exit(pkg_resources.load_entry_point('coverage', 'console_scripts', 'coverage')())
  E         -              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 522, in load_entry_point
  E         -     return get_distribution(dist).load_entry_point(group, name)
  E         -            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 2855, in load_entry_point
  E         -     return ep.load()
  E         -            ^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 2467, in load
  E         -     self.require(*args, **kwargs)
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 2489, in require
  E         -     reqs = self.dist.requires(self.extras)
  E         -            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 2746, in requires
  E         -     dm = self._dep_map
  E         -          ^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 3032, in _dep_map
  E         -     self.__dep_map = self._compute_dependencies()
  E         -                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 3049, in _compute_dependencies
  E         -     common = types.MappingProxyType(dict.fromkeys(reqs_for_extra(None)))
  E         -                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/__init__.py", line 3046, in reqs_for_extra
  E         -     if not req.marker or req.marker.evaluate({'extra': extra}):
  E         -                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/_vendor/packaging/markers.py", line 245, in evaluate
  E         -     return _evaluate_markers(self._markers, current_environment)
  E         -            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/_vendor/packaging/markers.py", line 137, in _evaluate_markers
  E         -     groups[-1].append(_evaluate_markers(marker, environment))
  E         -                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/_vendor/packaging/markers.py", line 151, in _evaluate_markers
  E         -     groups[-1].append(_eval_op(lhs_value, op, rhs_value))
  E         -                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/_vendor/packaging/markers.py", line 109, in _eval_op
  E         -     return spec.contains(lhs, prereleases=True)
  E         -            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/_vendor/packaging/specifiers.py", line 565, in contains
  E         -     normalized_item = _coerce_version(item)
  E         -                       ^^^^^^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/_vendor/packaging/specifiers.py", line 36, in _coerce_version
  E         -     version = Version(version)
  E         -               ^^^^^^^^^^^^^^^^
  E         -   File "/home/runner/work/coveragepy/coveragepy/.tox/py312/lib/python3.12/site-packages/pkg_resources/_vendor/packaging/version.py", line 197, in __init__
  E         -     raise InvalidVersion(f"Invalid version: '{version}'")
  E         - pkg_resources.extern.packaging.version.InvalidVersion: Invalid version: '3.12.0a4+'
  
  /home/runner/work/coveragepy/coveragepy/tests/test_process.py:853: AssertionError

[nedbat]

The failure started because of the setuptools version upgrade in 712bd2b. Not sure why, but locally I end up with setuptools==65.6.3, and in CI I get 67.2.0.

[nedbat]

This is temporarily fixed by pinning setuptools in 7887212.

[nedbat]

This is temporarily fixed in a different way in cf3602f.