change runtime error check in APPEND instruction to assert #310

	name: Build and Test
	on: [push, pull_request]

	jobs:
	formatting:
	env:
	SRCS: hololisp tools
	runs-on: ubuntu-latest
	steps:
	- name: Fetch
	uses: actions/checkout@master
	- uses: DoozyX/clang-format-lint-action@v0.13
	with:
	source: '.'
	extensions: 'h,c'
	clangFormatVersion: 12
	test:
	runs-on: ubuntu-latest
	steps:
	- name: Fetch
	uses: actions/checkout@master
	- name: Test
	run: \|
	make test DEBUG=1
	coverage:
	runs-on: ubuntu-latest
	steps:
	- name: Fetch
	uses: actions/checkout@master
	- name: Install stuff
	run: \|
	sudo apt-get install -y gcovr
	curl -Os https://uploader.codecov.io/latest/linux/codecov && chmod +x codecov
	- name: Test
	run: \|
	make test COV=1
	- name: Generate coverage statistics
	run: \|
	gcovr -x cov.xml
	# This is for debugging
	gcovr
	- name: Upload
	run: \|
	./codecov -f cov.xml

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