test_async_generator_gc_liveness.cjs
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test_async_generator_gc_liveness.cjs
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	function assert(cond, msg) {
	if (!cond) throw new Error(msg);
	}

	function churnGarbage(rounds, width) {
	const ring = new Array(8);
	for (let r = 0; r < rounds; r++) {
	const batch = new Array(width);
	for (let i = 0; i < width; i++) {
	batch[i] = {
	i,
	label: "item-" + i,
	arr: [i, i + 1, i + 2, i + 3],
	};
	}
	ring[r & 7] = batch;
	}
	return ring.length;
	}

	async function* delayedCounter() {
	await new Promise((resolve) => setTimeout(resolve, 0));
	yield 42;
	}

	async function runOnce() {
	let iter = delayedCounter();
	const nextPromise = iter.next();
	iter = null;

	churnGarbage(128, 256);

	const result = await nextPromise;
	assert(result && result.value === 42, "expected yielded value");
	assert(result.done === false, "expected unfinished iterator result");
	}

	async function main() {
	for (let i = 0; i < 64; i++) await runOnce();
	console.log("async generator survives GC after iterator becomes unreachable");
	}

	main().catch((err) => {
	console.error(err && err.stack ? err.stack : String(err));
	throw err;
	});