René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"stream/iter: fused stateless transforms do not normalize output between transforms","articleBody":"### Version\n\nmain\n\n### Platform\n\n```text\nN/A\n```\n\n### Subsystem\n\nstream\n\n### What steps will reproduce the bug?\n\n```js\nimport { from, fromSync, pull, pullSync, text, textSync } from 'node:stream/iter';\n\nconst first = (chunks) =>\n  chunks === null ? null : new Uint8Array([65]);\n\nconst asyncSecond = (chunks) => {\n  if (chunks !== null)\n    console.log('async received array:', Array.isArray(chunks));\n  return chunks;\n};\n\nconst syncSecond = (chunks) => {\n  if (chunks !== null)\n    console.log('sync received array:', Array.isArray(chunks));\n  return chunks;\n};\n\nawait text(pull(from('x'), first, asyncSecond));\ntextSync(pullSync(fromSync('x'), first, syncSecond));\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\nasync received array: true\nsync received array: true\n```\n\nThe first transform’s `Uint8Array` result should be normalized to a single-element `Uint8Array[]` batch before it is passed to the second transform.\n\n### What do you see instead?\n\n```console\nasync received array: false\nsync received array: false\n```\n\nThe second transform receives the raw `Uint8Array` returned by the first transform. Both fused async and synchronous paths normalize only after every transform in the run has executed.\n\n### Additional information\n\n_No response_","author":{"url":"https://github.com/trivikr","@type":"Person","name":"trivikr"},"datePublished":"2026-08-18T02:46:49Z","url":"https://github.com/nodejs/node/issues/65366"}