Bug fix: Prevent null de-reference when using poll in main_loop #130

	name: Linux
	on: [push, pull_request]

	jobs:
	alpine:
	strategy:
	matrix:
	compiler: [clang, gcc]
	runs-on: ubuntu-latest
	container: alpine:latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2
	- name: Build
	env:
	CC: ${{ matrix.compiler }}
	run: \|
	test/test_build.sh alpine

	debian:
	strategy:
	matrix:
	compiler: [clang, gcc]
	runs-on: ubuntu-latest
	container: debian:stable
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2
	- name: Build
	env:
	CC: ${{ matrix.compiler }}
	run: \|
	test/test_build.sh debian

	fedora:
	strategy:
	matrix:
	compiler: [clang, gcc]
	runs-on: ubuntu-latest
	container: fedora:latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2
	- name: Build
	env:
	CC: ${{ matrix.compiler }}
	run: \|
	test/test_build.sh fedora

	opensuse:
	strategy:
	matrix:
	compiler: [clang, gcc]
	runs-on: ubuntu-latest
	container: opensuse/leap:latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v1 # Action checkout@v2 triggers an error about non existing "tar" command
	- name: Build
	env:
	CC: ${{ matrix.compiler }}
	run: \|
	test/test_build.sh opensuse

	ubuntu:
	strategy:
	matrix:
	ubuntu_version: [ubuntu-18.04, ubuntu-20.04, ubuntu-22.04]
	compiler: [clang, gcc]
	runs-on: ${{ matrix.ubuntu_version }}
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2
	- name: Build
	env:
	CC: ${{ matrix.compiler }}
	run: \|
	test/test_build.sh ubuntu

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