Check against Rust Beta versions #1

	# It can happen, that new compiler versions introduce new behavior to the Rust
	# standard library, which might impact this tool (see rust-lang/rust#133574 for
	# an example of such an issue). Therefore this job builds the code with the
	# current beta compiler to detect potential issues before they reach the stable
	# compiler/standard library. The jobs runs periodically.
	name: Check against Rust Beta versions
	on:
	schedule:
	- cron: '0 9 * * SUN' # run at every Sunday morning
	jobs:
	test:
	runs-on: ubuntu-latest
	permissions:
	issues: write
	steps:
	- uses: actions/checkout@v4
	- run: rustup update beta && rustup default beta
	- name: Compile the code with the beta compiler
	id: build-beta
	run: \|
	set -uex
	if ! cargo test > error.log 2>&1; then
	printf 'Hello, I have detected, that this repository does not work with the current beta compiler.\n\nIt looks like, there were changes introduced, that broke this repository. The error was:\n```console\n%s\n```\nPlease take actions to fix this before the behavior reaches stable.' "$(< error.log)" \| gh issue create --title 'The compilation fails with current beta compiler' --body-file -
	fi
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	GH_REPO: ${{ github.repository }}

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