Coverage

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

- Fix: in some cases, even with ``[run] relative_files=True``, a data file
could be created with absolute path names. When combined with other relative
data files, it was random whether the absolute file names would be made
relative or not. If they weren't, then a file would be listed twice in
reports, as detailed in `issue 1752`_. This is now fixed: absolute file
names are always made relative when combining. Thanks to Bruno Rodrigues dos
Santos for support.

- Fix: the last case of a match/case statement had an incorrect message if the
branch was missed. It said the pattern never matched, when actually the
branch is missed if the last case always matched.

- Fix: clicking a line number in the HTML report now positions more accurately.

- Fix: the ``report:format`` setting was defined as a boolean, but should be a
string. Thanks, `Tanaydin Sirin <pull 1754_>`_. It is also now documented
on the :ref:`configuration page <config_report_format>`.

.. _issue 1752: https://github.com/nedbat/coveragepy/issues/1752
.. _pull 1754: https://github.com/nedbat/coveragepy/pull/1754


.. _changes_7-4-3:

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

- Fix: in some cases, coverage could fail with a RuntimeError: "Set changed
size during iteration." This is now fixed, closing `issue 1733`_.

.. _issue 1733: https://github.com/nedbat/coveragepy/issues/1733


.. _changes_7-4-2:

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

- Fix: setting ``COVERAGE_CORE=sysmon`` no longer errors on 3.11 and lower,
thanks `Hugo van Kemenade <pull 1747_>`_. It now issues a warning that
sys.monitoring is not available and falls back to the default core instead.

.. _pull 1747: https://github.com/nedbat/coveragepy/pull/1747


.. _changes_7-4-1:

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

- Python 3.13.0a3 is supported.

- Fix: the JSON report now includes an explicit format version number, closing
`issue 1732`_.

.. _issue 1732: https://github.com/nedbat/coveragepy/issues/1732


.. _changes_7-4-0:

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

- In Python 3.12 and above, you can try an experimental core based on the new
:mod:`sys.monitoring <python:sys.monitoring>` module by defining a
``COVERAGE_CORE=sysmon`` environment variable. This should be faster for
line coverage, but not for branch coverage, and plugins and dynamic contexts
are not yet supported with it. I am very interested to hear how it works (or
doesn't!) for you.


.. _changes_7-3-4:

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

- Fix: the change for multi-line signature exclusions in 7.3.3 broke other
forms of nested clauses being excluded properly. This is now fixed, closing
`issue 1713`_.

- Fix: in the HTML report, selecting code for copying won't select the line
numbers also. Thanks, `Robert Harris <pull 1717_>`_.

.. _issue 1713: https://github.com/nedbat/coveragepy/issues/1713
.. _pull 1717: https://github.com/nedbat/coveragepy/pull/1717


.. _changes_7-3-3: