ci: set RUST_TEST_THREADS=1 on musl to prevent concurrent PTY SIGSEGV #7

	name: Musl Stability Test

	permissions:
	contents: read

	on:
	push:
	branches:
	- claude/reproduce-flaky-failure-RuwlG

	concurrency:
	group: musl-stability-${{ github.sha }}

	jobs:
	test-musl:
	name: Test (musl) - Run ${{ matrix.run }}
	strategy:
	fail-fast: false
	matrix:
	run: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
	runs-on: ubuntu-latest
	container:
	image: node:22-alpine3.21
	options: --shm-size=256m
	env:
	RUSTFLAGS: --cfg tokio_unstable -D warnings -C target-feature=-crt-static
	RUST_TEST_THREADS: 1
	steps:
	- name: Install Alpine dependencies
	shell: sh {0}
	run: apk add --no-cache bash curl git musl-dev gcc g++ python3

	- uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
	with:
	persist-credentials: false
	submodules: true

	- name: Install rustup
	run: \|
	curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \| sh -s -- -y --default-toolchain none
	echo "$HOME/.cargo/bin" >> "$GITHUB_PATH"

	- name: Install Rust toolchain
	run: rustup show

	- name: Install pnpm and Node tools
	run: \|
	corepack enable
	pnpm install

	- run: cargo test

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