Change: Unreachable range for default only switch should target CB_FAILED #736

	name: Regression

	on:
	pull_request:
	push:
	branches:
	- master

	jobs:
	regression:

	name: Python ${{ matrix.python-version }} on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macOS-latest, windows-latest]
	python-version: ['3.7', '3.8', '3.9', '3.10', 'pypy3.7']
	exclude:
	# Prebuilt pillow wheels aren't always available for the relevant PyPy version.
	# The Ubuntu runner has zlib headers and can build it locally, but these can't without more work.
	- os: macOS-latest
	python-version: pypy3.7
	- os: windows-latest
	python-version: pypy3.7

	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 2

	- name: Checkout tags
	shell: bash
	run: \|
	git fetch --depth=1 origin +refs/tags/:refs/tags/

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	cache: 'pip'
	cache-dependency-path: setup.py

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip setuptools
	python -m pip install -e .

	- name: Test
	run: make -C regression
	shell: bash
	env:
	NMLC: nmlc

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