add a comment about cython coverage issues #3769

	name: Warning Tests

	on:
	push:
	# This should disable running the workflow on tags, according to the
	# on.<push\|pull_request>.<branches\|tags> GitHub Actions docs.
	branches:
	- "*"
	pull_request:

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	warning_test:
	name: Warning Test
	env:
	PYTEST_OPTIONS: ${{ case(matrix.coverage == true, '--cov=pyuvdata --cov-config=.coveragerc --cov-report xml:coverage.xml', '') }}
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	include:
	- python-version: 3.13
	pip-options: "dev"
	coverage: true
	# currently (April 2026), python-casacore does not build properly from pypi on python 3.14
	# also, cython's coverage plugin causes errors when building from pypi on python 3.14
	- python-version: 3.14
	pip-options: "test"
	coverage: false
	steps:
	- uses: actions/checkout@main
	with:
	fetch-depth: 0

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install
	run: \|
	CFLAGS="-DCYTHON_TRACE=1 -DCYTHON_TRACE_NOGIL=1" pip install -e .[${{ matrix.pip-options }}]
	pip install pytest-xdist

	- name: Environment Info
	run: \|
	pip list

	- name: Run Tests
	run: \|
	pytest -W error -n auto ${{ env.PYTEST_OPTIONS }}

	- uses: codecov/codecov-action@v5
	if: success()
	with:
	token: ${{secrets.CODECOV_TOKEN}} #required
	files: ./coverage.xml #optional

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