Fix potential deadlock in discard #203

	name: Licence-date-verification
	on:
	pull_request:
	branches:
	- master
	- v*

	env:
	EXTENSIONS: "c h cpp py go sh mk spec service"
	FILES: "*Makefile"
	jobs:
	verify-date:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2.1.0
	with:
	fetch-depth: 0
	- name: Get changed files
	id: changed-files
	uses: tj-actions/changed-files@v18.2
	with:
	files_ignore: '.github/**'
	- name: List all changed files
	run: \|
	files_to_check=(${{ steps.changed-files.outputs.added_files }})
	files_to_check+=(${{ steps.changed-files.outputs.modified_files }})

	for file in ${files_to_check[@]}; do
	for file_in_list in $FILES; do
	if [[ "$file" == $file_in_list ]]; then
	.github/verify_header.sh "$file"
	continue 2
	fi
	done

	extension=${file##*.}
	if [[ "$EXTENSIONS" =~ $extension ]]; then
	.github/verify_header.sh "$file"
	fi
	done

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