Undo simplification, this was apparently needed #578

	name: Build & Test on Ubuntu
	on: push

	jobs:
	build:
	runs-on: ubuntu-20.04
	steps:
	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y valgrind
	sudo apt-get install -y binutils-dev
	- name: Add Toolchain PPA
	run: \|
	sudo add-apt-repository ppa:ubuntu-toolchain-r/test
	- name: Add debian repository
	uses: myci-actions/add-deb-repo@10
	with:
	repo: deb http://apt.llvm.org/focal/ llvm-toolchain-focal-16 main
	repo-name: llvm-toolchain
	keys-asc: https://apt.llvm.org/llvm-snapshot.gpg.key
	update: true
	install: clang-16 llvm-16
	- name: Update Alternatives
	run: \|
	sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-16 100
	sudo update-alternatives --set clang /usr/bin/clang-16
	- name: Python 3.9 Time
	uses: actions/setup-python@v5
	with:
	python-version: '3.9'
	- name: Install requirements
	run: \|
	python3.9 -m pip install tatsu requests
	- name: Checkout
	uses: actions/checkout@v4
	- name: Do the thing
	run: \|
	python3.9 travis.py

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