chore: null out ref for closed stream. #955

	name: Build and test Pekko with Scala 3

	on:
	schedule:
	- cron: "0 0 * * *"
	pull_request:
	workflow_dispatch:

	permissions: {}

	concurrency:
	# Only run once for latest commit per ref and cancel other (previous) runs.
	group: ci-scala3-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	test:
	name: Test
	runs-on: ubuntu-22.04
	if: github.repository == 'apache/pekko'
	strategy:
	fail-fast: true
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0
	fetch-tags: true

	- name: Setup Java 11
	uses: actions/setup-java@v4
	with:
	distribution: temurin
	java-version: 11

	- name: Install sbt
	uses: sbt/setup-sbt@v1

	- name: Cache Coursier cache
	uses: coursier/cache-action@v6

	- name: Enable jvm-opts
	run: cp .jvmopts-ci .jvmopts

	- name: Compile and run tests on Scala 3
	env:
	DEVELOCITY_ACCESS_KEY: ${{ secrets.GE_ACCESS_TOKEN }}
	# note that this is not running any multi-jvm tests (yet) because multi-in-test=false
	run: \|
	sbt \
	-Dpekko.log.timestamps=true \
	-Dpekko.test.timefactor=2 \
	-Dpekko.actor.testkit.typed.timefactor=2 \
	-Dpekko.test.multi-in-test=false \
	-Dpekko.test.tags.exclude=gh-exclude,timing \
	-Dmultinode.XX:MetaspaceSize=128M \
	-Dmultinode.Xms256M \
	-Dmultinode.Xmx256M \
	-Dmultinode.XX:+AlwaysActAsServerClassMachine \
	"++ 3.x test"

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