Fix memory leak, and display puzzle pair counts without rotation. #148

	# This workflow will install Python dependencies and run tests with a single version of Python
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: build

	on:
	- push
	- pull_request

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: "3.10"
	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y -q freeglut3-dev xvfb libxkbcommon-x11-0 xserver-xephyr libxcb-xinerama0
	python -m pip install --upgrade pip
	pip install pipenv
	pipenv install --dev
	pip install coverage # Extra copy for codecov upload.
	- name: Scan with mypy
	run: \|
	pipenv run mypy four_letter_blocks
	- name: Test with pytest
	id: test
	run: \|
	# Add QT_DEBUG_PLUGINS=1 before xvfb-run to debug Qt library problems.
	xvfb-run -a pipenv run python -m coverage run --source=four_letter_blocks -m pytest
	- name: Upload code coverage
	run: \|
	pipenv install codecov
	pipenv run codecov
	- name: Upload image diffs
	uses: actions/upload-artifact@v2
	if: ${{ always() && steps.test.outcome == 'failure' }}
	with:
	name: image-diffs
	path: \|
	tests/pixmap_diffs/*.png
	tests/pixmap_diffs/*.svg

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