stream/iter: pull() with AbortSignal hangs while awaiting source next() #63497

import { pull } from 'node:stream/iter';

const source = {
  async *[Symbol.asyncIterator]() {
    await new Promise(() => {});
  },
};

const ac = new AbortController();
const iterator = pull(source, { signal: ac.signal })[Symbol.asyncIterator]();

const next = iterator.next().then(
  () => 'settled: fulfilled',
  (err) => `settled: rejected with ${err.name}: ${err.message}`,
);

ac.abort();

console.log(await Promise.race([
  next,
  new Promise((resolve) => setTimeout(resolve, 100, 'still pending after abort')),
]));