Publisher#flatMapConcatIterable may skip emitting items #4731

	name: PR Builder
	on:
	pull_request:
	branches: [ main, '0.41', '0.42' ]
	jobs:
	build:
	name: JDK ${{ matrix.java }} ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	java: [ 8, 11, 17, 21 ]
	os: [ ubuntu-latest ]
	steps:
	- name: Checkout Code
	uses: actions/checkout@v4
	- name: Set up JDK ${{ matrix.java }}
	uses: actions/setup-java@v4
	with:
	java-version: ${{ matrix.java }}
	distribution: 'zulu'
	cache: 'gradle'
	- name: Print JDK Version
	run: java -version
	- name: Make gradlew Executable
	run: chmod +x gradlew
	- name: Clean Gradle project
	run: ./gradlew --parallel clean
	# https://github.community/t/error-the-paging-file-is-too-small-for-this-operation-to-complete/17141
	- name: Configure Windows Pagefile
	if: ${{ runner.os == 'Windows' }}
	# v1.2
	uses: al-cheb/configure-pagefile-action@a3b6ebd6b634da88790d9c58d4b37a7f4a7b8708
	with:
	minimum-size: 8GB
	maximum-size: 16GB
	- name: Build and Test (Linux)
	if: runner.os == 'Linux'
	env:
	JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
	run: sudo -E env "PATH=$PATH" bash -c "ulimit -l 65536 && ulimit -a && ./gradlew --no-daemon --parallel test"
	- name: Build and Test (non-Linux)
	if: runner.os != 'Linux'
	env:
	JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
	run: ./gradlew --no-daemon --parallel test
	- name: Upload Test Results
	if: always()
	uses: actions/upload-artifact@v4
	with:
	name: test-results-${{ matrix.os }}-${{ matrix.java }}
	path: '*/build/test-results/test/TEST-.xml'

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