Update coverage to 6.4.1

[pyup-bot]

This PR updates coverage from 6.2 to 6.4.1.

Changelog

6.4.1

--------------------------

- Greatly improved performance on PyPy, and other environments that need the
pure Python trace function.  Thanks, Carl Friedrich Bolz-Tereick (`pull
1381`_ and `pull 1388`_).  Slightly improved performance when using the C
trace function, as most environments do.  Closes `issue 1339`_.

- The conditions for using tomllib from the standard library have been made
more precise, so that 3.11 alphas will continue to work. Closes `issue
1390`_.

.. _issue 1339: https://github.com/nedbat/coveragepy/issues/1339
.. _pull 1381: https://github.com/nedbat/coveragepy/pull/1381
.. _pull 1388: https://github.com/nedbat/coveragepy/pull/1388
.. _issue 1390: https://github.com/nedbat/coveragepy/issues/1390


.. _changes_64:

6.4

------------------------

- A new setting, :ref:`config_run_sigterm`, controls whether a SIGTERM signal
handler is used.  In 6.3, the signal handler was always installed, to capture
data at unusual process ends.  Unfortunately, this introduced other problems
(see `issue 1310`_).  Now the signal handler is only used if you opt-in by
setting ``[run] sigterm = true``.

- Small changes to the HTML report:

- Added links to next and previous file, and more keyboard shortcuts: ``[``
 and ``]`` for next file and previous file; ``u`` for up to the index; and
 ``?`` to open/close the help panel.  Thanks, `J. M. F. Tsang
 <pull 1364_>`_.

- The timestamp and version are displayed at the top of the report.  Thanks,
 `Ammar Askar <pull 1354_>`_. Closes `issue 1351`_.

- A new debug option ``debug=sqldata`` adds more detail to ``debug=sql``,
logging all the data being written to the database.

- Previously, running ``coverage report`` (or any of the reporting commands) in
an empty directory would create a .coverage data file.  Now they do not,
fixing `issue 1328`_.

- On Python 3.11, the ``[toml]`` extra no longer installs tomli, instead using
tomllib from the standard library.  Thanks `Shantanu <pull 1359_>`_.

- In-memory CoverageData objects now properly update(), closing `issue 1323`_.

.. _issue 1310: https://github.com/nedbat/coveragepy/issues/1310
.. _issue 1323: https://github.com/nedbat/coveragepy/issues/1323
.. _issue 1328: https://github.com/nedbat/coveragepy/issues/1328
.. _issue 1351: https://github.com/nedbat/coveragepy/issues/1351
.. _pull 1354: https://github.com/nedbat/coveragepy/pull/1354
.. _pull 1359: https://github.com/nedbat/coveragepy/pull/1359
.. _pull 1364: https://github.com/nedbat/coveragepy/pull/1364


.. _changes_633:

6.3.3

--------------------------

- Fix: Coverage.py now builds successfully on CPython 3.11 (3.11.0b1) again.
Closes `issue 1367`_.  Some results for generators may have changed.

.. _issue 1367: https://github.com/nedbat/coveragepy/issues/1367


.. _changes_632:

6.3.2

--------------------------

- Fix: adapt to pypy3.9's decorator tracing behavior.  It now traces function
decorators like CPython 3.8: both the -line and the def-line are traced.
Fixes `issue 1326`_.

- Debug: added ``pybehave`` to the list of :ref:`coverage debug <cmd_debug>`
and :ref:`cmd_run_debug` options.

- Fix: show an intelligible error message if ``--concurrency=multiprocessing``
is used without a configuration file.  Closes `issue 1320`_.

.. _issue 1320: https://github.com/nedbat/coveragepy/issues/1320
.. _issue 1326: https://github.com/nedbat/coveragepy/issues/1326


.. _changes_631:

6.3.1

--------------------------

- Fix: deadlocks could occur when terminating processes.  Some of these
deadlocks (described in `issue 1310`_) are now fixed.

- Fix: a signal handler was being set from multiple threads, causing an error:
"ValueError: signal only works in main thread".  This is now fixed, closing
`issue 1312`_.

- Fix: ``--precision`` on the command-line was being ignored while considering
``--fail-under``.  This is now fixed, thanks to
`Marcelo Trylesinski <pull 1317_>`_.

- Fix: releases no longer provide 3.11.0-alpha wheels. Coverage.py uses CPython
internal fields which are moving during the alpha phase. Fixes `issue 1316`_.

.. _issue 1310: https://github.com/nedbat/coveragepy/issues/1310
.. _issue 1312: https://github.com/nedbat/coveragepy/issues/1312
.. _issue 1316: https://github.com/nedbat/coveragepy/issues/1316
.. _pull 1317: https://github.com/nedbat/coveragepy/pull/1317


.. _changes_63:

6.3

------------------------

- Feature: Added the ``lcov`` command to generate reports in LCOV format.
Thanks, `Bradley Burns <pull 1289_>`_. Closes issues `587 <issue 587_>`_
and `626 <issue 626_>`_.

- Feature: the coverage data file can now be specified on the command line with
the ``--data-file`` option in any command that reads or writes data.  This is
in addition to the existing ``COVERAGE_FILE`` environment variable.  Closes
`issue 624`_. Thanks, `Nikita Bloshchanevich <pull 1304_>`_.

- Feature: coverage measurement data will now be written when a SIGTERM signal
is received by the process.  This includes
:meth:`Process.terminate <python:multiprocessing.Process.terminate>`,
and other ways to terminate a process.  Currently this is only on Linux and
Mac; Windows is not supported.  Fixes `issue 1307`_.

- Dropped support for Python 3.6, which reached end-of-life on 2021-12-23.

- Updated Python 3.11 support to 3.11.0a4, fixing `issue 1294`_.

- Fix: the coverage data file is now created in a more robust way, to avoid
problems when multiple processes are trying to write data at once. Fixes
issues `1303 <issue 1303_>`_ and `883 <issue 883_>`_.

- Fix: a .gitignore file will only be written into the HTML report output
directory if the directory is empty.  This should prevent certain unfortunate
accidents of writing the file where it is not wanted.

- Releases now have MacOS arm64 wheels for Apple Silicon, fixing `issue 1288`_.

.. _issue 587: https://github.com/nedbat/coveragepy/issues/587
.. _issue 624: https://github.com/nedbat/coveragepy/issues/624
.. _issue 626: https://github.com/nedbat/coveragepy/issues/626
.. _issue 883: https://github.com/nedbat/coveragepy/issues/883
.. _issue 1288: https://github.com/nedbat/coveragepy/issues/1288
.. _issue 1294: https://github.com/nedbat/coveragepy/issues/1294
.. _issue 1303: https://github.com/nedbat/coveragepy/issues/1303
.. _issue 1307: https://github.com/nedbat/coveragepy/issues/1307
.. _pull 1289: https://github.com/nedbat/coveragepy/pull/1289
.. _pull 1304: https://github.com/nedbat/coveragepy/pull/1304


.. _changes_62:

Links

• PyPI: https://pypi.org/project/coverage
• Changelog: https://pyup.io/changelogs/coverage/
• Repo: https://github.com/nedbat/coveragepy

[coveralls]

Coverage decreased (-0.5%) to 84.028% when pulling 46c2574 on pyup-update-coverage-6.2-to-6.4.1 into 727d91d on master.