Fail with a proper error when tying to modify attributes pythran cons… #1273

	name: core

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master
	jobs:
	build:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	python-version: [3.7, 3.9, 3.11, 3.12, pypy-3.9]
	cpp-version: [g++-8, clang-7]
	steps:
	- uses: actions/checkout@v2
	- name: Setup Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install scipy-openblas64
	pip install pytest-xdist
	sudo apt install ${{ matrix.cpp-version }}
	if test ${{ matrix.python-version }} != 'pypy-3.9'; then pip install scipy ; fi
	- name: Setup
	run: \|
	python -m pip install .
	python -m pip install . 'pythran[test]'
	printf '[compiler]\nblas=scipy-openblas\n' > ~/.config/.pythranrc
	printf 'cflags=-std=c++11 -Wall -Werror -Wno-unknown-pragmas -Wno-unused-local-typedefs -Wno-cpp -Wno-deprecated-declarations' >> ~/.config/.pythranrc
	if test "${{ matrix.cpp-version }}" = "clang-7" ; then printf -- " -Wno-absolute-value -Wno-parentheses-equality\n" ; else printf "\n" ; fi >> ~/.config/.pythranrc
	- name: Testing minimal CLI
	run: \|
	pythran --version
	pythran --help
	pythran-config -vvv
	- name: Testing sequential
	run: \|
	export CC=`echo ${{ matrix.cpp-version }} \| sed -e 's/g++/gcc/'`
	export CXX=`echo ${{ matrix.cpp-version }} \| sed -e 's/clang/clang++/'`
	pytest pythran/tests/test_*.py -v -x --numprocesses=auto $PYTEST_ARGS

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