René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"buffer: isUtf8 and isAscii accept detached TypedArray views","articleBody":"### Version\n\nlatest main branch\n\n### Platform\n\n```text\n7.1.2-arch3-1\n```\n\n### Subsystem\n\nbuffer\n\n### What steps will reproduce the bug?\n\n  ```js\n  const { isUtf8, isAscii } = require('node:buffer');\n\n  const view = new Uint8Array([0xff]);\n  structuredClone(view.buffer, { transfer: [view.buffer] });\n\n  console.log(isUtf8(view));\n  console.log(isAscii(view));\n  ```\n\n### How often does it reproduce? Is there a required condition?\n\nArrayBufferViewContents reads the view's zero byte length but does not record the detached state of its backing ArrayBuffer.\n\n### What is the expected behavior? Why is that the expected behavior?\n\nBoth functions should throw ERR_INVALID_STATE, consistent with passing a detached ArrayBuffer directly.\n\n### What do you see instead?\n\nBoth functions return true.\n\n### Additional information\n\n\n","author":{"url":"https://github.com/Archkon","@type":"Person","name":"Archkon"},"datePublished":"2026-07-14T17:14:50Z","url":"https://github.com/nodejs/node/issues/64503"}