René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"stream/iter: writer.fail(0) can leave async iterator readers pending forever","articleBody":"### Version\n\n26.2.0\n\n### Platform\n\n```text\nmacOS 26.5.0\n```\n\n### Subsystem\n\nstream\n\n### What steps will reproduce the bug?\n\n```js\nimport { push } from 'node:stream/iter';\nimport { setTimeout } from 'node:timers/promises';\n\nconst { writer, readable } = push();\nconst reader = readable[Symbol.asyncIterator]();\n\nwriter.fail(0);\n\nconst result = await Promise.race([\n  reader.next().then(\n    (value) =\u003e ({ type: 'settled', value }),\n    (reason) =\u003e ({ type: 'rejected', reason }),\n  ),\n  setTimeout(100, { type: 'timeout' }),\n]);\n\nconsole.log(result);\n```\n\n### How often does it reproduce? Is there a required condition?\n\nAlways\n\n### What is the expected behavior? Why is that the expected behavior?\n\n```console\n{ type: 'rejected', reason: 0 }\n```\n`next()` should reject with the stored failure reason, including falsy values such as `0` or `false`, because `fail(reason)` accepts any value.\n\n### What do you see instead?\n\n```console\n{ type: 'timeout' }\n```\nAfter calling `writer.fail(0)`, a subsequent `readable[Symbol.asyncIterator]().next()` does not settle and the repro times out.\n\n### Additional information\n\n_No response_","author":{"url":"https://github.com/trivikr","@type":"Person","name":"trivikr"},"datePublished":"2026-05-25T20:56:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/63568/node/issues/63568"}