René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"stream/iter: Writer methods do not consistently validate options.signal","articleBody":"### Version\n\nmain\n\n### Platform\n\n```text\nmacOS 26.5.2\n```\n\n### Subsystem\n\nstream\n\n### What steps will reproduce the bug?\n\n```js\nimport { Writable } from 'node:stream';\nimport {\n  broadcast,\n  fromWritable,\n  push,\n} from 'node:stream/iter';\n\nconst badOptions = { signal: 'not an AbortSignal' };\n\nconst classicWritable = new Writable({\n  write(chunk, encoding, callback) {\n    callback();\n  },\n});\n\nconst cases = [\n  ['push().writer.write()', () =\u003e push().writer.write('x', badOptions)],\n  ['push().writer.writev()', () =\u003e push().writer.writev(['x'], badOptions)],\n  ['push().writer.end()', () =\u003e push().writer.end(badOptions)],\n\n  ['broadcast().writer.write()', () =\u003e broadcast().writer.write('x', badOptions)],\n  ['broadcast().writer.writev()', () =\u003e broadcast().writer.writev(['x'], badOptions)],\n  ['broadcast().writer.end()', () =\u003e broadcast().writer.end(badOptions)],\n\n  ['fromWritable().write()', () =\u003e fromWritable(classicWritable).write('x', badOptions)],\n  ['fromWritable().writev()', () =\u003e fromWritable(classicWritable).writev(['x'], badOptions)],\n  ['fromWritable().end()', () =\u003e fromWritable(classicWritable).end(badOptions)],\n];\n\nfor (const [name, run] of cases) {\n  try {\n    const result = run();\n    if (result?.then) {\n      await result;\n    }\n    console.log(`${name}: resolved`);\n  } catch (err) {\n    console.log(`${name}: ${err.code ?? err.name}: ${err.message}`);\n  }\n}\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\npush().writer.write(): ERR_INVALID_ARG_TYPE: ...\npush().writer.writev(): ERR_INVALID_ARG_TYPE: ...\npush().writer.end(): ERR_INVALID_ARG_TYPE: ...\nbroadcast().writer.write(): ERR_INVALID_ARG_TYPE: ...\nbroadcast().writer.writev(): ERR_INVALID_ARG_TYPE: ...\nbroadcast().writer.end(): ERR_INVALID_ARG_TYPE: ...\nfromWritable().write(): ERR_INVALID_ARG_TYPE: ...\nfromWritable().writev(): ERR_INVALID_ARG_TYPE: ...\nfromWritable().end(): ERR_INVALID_ARG_TYPE: ...\n```\n\nA proper invalid-argument TypeError for `options.signal`, ideally Node’s usual `ERR_INVALID_ARG_TYPE`, because the spec defines `WriteOptions.signal` as an `AbortSignal`.\n\n### What do you see instead?\n\n```console\npush().writer.write(): TypeError: signal?.throwIfAborted is not a function\npush().writer.writev(): TypeError: signal?.throwIfAborted is not a function\npush().writer.end(): resolved\nbroadcast().writer.write(): TypeError: signal?.throwIfAborted is not a function\nbroadcast().writer.writev(): TypeError: signal?.throwIfAborted is not a function\nbroadcast().writer.end(): resolved\nfromWritable().write(): resolved\nfromWritable().writev(): resolved\nfromWritable().end(): resolved\n```\n\n### Additional information\n\n_No response_","author":{"url":"https://github.com/trivikr","@type":"Person","name":"trivikr"},"datePublished":"2026-07-09T05:02:57.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/64384/node/issues/64384"}