fix: prevent nil value error #1319

	name: default

	on: [push, pull_request]

	jobs:
	run_tests:
	name: unit tests
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	include:
	- os: ubuntu-22.04
	rev: nightly/nvim-linux64.tar.gz
	- os: ubuntu-22.04
	rev: v0.7.2/nvim-linux64.tar.gz
	- os: ubuntu-22.04
	rev: v0.8.3/nvim-linux64.tar.gz
	- os: ubuntu-22.04
	rev: v0.9.1/nvim-linux64.tar.gz
	steps:
	- uses: actions/checkout@v3
	- run: date +%F > todays-date
	- name: Restore cache for today's nightly.
	uses: actions/cache@v3
	with:
	path: _neovim
	key: ${{ runner.os }}-${{ matrix.rev }}-${{ hashFiles('todays-date') }}
	- name: Prepare
	run: \|
	test -d _neovim \|\| {
	mkdir -p _neovim
	curl -sL "https://github.com/neovim/neovim/releases/download/${{ matrix.rev }}" \| tar xzf - --strip-components=1 -C "${PWD}/_neovim"
	}

	- name: Run tests
	run: \|
	export PATH="${PWD}/_neovim/bin:${PATH}"
	export VIM="${PWD}/_neovim/share/nvim/runtime"
	nvim --version
	make test

	stylua:
	name: stylua
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v3
	- uses: JohnnyMorganz/stylua-action@v2
	with:
	token: ${{ secrets.GITHUB_TOKEN }}
	version: latest
	# CLI arguments
	args: --color always --check .

	luacheck:
	name: Luacheck
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v3

	- name: Prepare
	run: \|
	sudo apt-get update
	sudo apt-get install -y luarocks
	sudo luarocks install luacheck

	- name: Lint
	run: sudo make lint

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