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

	async function* delayedPair() {
	await new Promise((resolve) => setTimeout(resolve, 0));
	yield 1;
	await new Promise((resolve) => setTimeout(resolve, 0));
	yield 2;
	}

	async function runOnce(iteration) {
	const it = delayedPair();

	const p1 = it.next();
	const p2 = it.next();
	const p3 = it.next();

	const r1 = await p1;
	const r2 = await p2;
	const r3 = await p3;

	console.log(
	"iter",
	iteration,
	JSON.stringify(r1),
	JSON.stringify(r2),
	JSON.stringify(r3),
	);

	assert(r1.done === false, "first next should not be done");
	assert(r1.value === 1, "first next should yield 1");
	assert(r2.done === false, "second next should not be done");
	assert(r2.value === 2, "second next should yield 2");
	assert(r3.done === true, "third next should complete the iterator");
	}

	async function main() {
	for (let i = 0; i < 64; i++) await runOnce(i);
	console.log("async generator overlap repro passed");
	}

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