René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Wrong interpretation of `{ a: 1 }['a']` in the REPL (BlockStatement v.s. ExpressionStatement)","articleBody":"### Version\r\n\r\nv19.2.0\r\n\r\n### Platform\r\n\r\n_No response_\r\n\r\n### Subsystem\r\n\r\n_No response_\r\n\r\n### What steps will reproduce the bug?\r\n\r\nEvaluate `{ a: 1 }['a']` in the REPL\r\n\r\n```sh\r\n$ node\r\n\u003e { a: 1 }['a']\r\n```\r\n\r\n### How often does it reproduce? Is there a required condition?\r\n\r\nAlways\r\n\r\n### What is the expected behavior?\r\n\r\n```sh\r\n$ node -p \"{ a: 1 }['a']\"\r\n[ 'a' ]\r\n$ node\r\n\u003e { a: 1 }['a']\r\n[ 'a' ]\r\n```\r\n\r\n### What do you see instead?\r\n\r\n```sh\r\n$ node -p \"{ a: 1 }['a']\"\r\n[ 'a' ]\r\n$ node\r\n\u003e { a: 1 }['a']\r\n1\r\n```\r\n\r\n### Additional information\r\n\r\nThe REPL tries to wrap the code that starts with `{` in parentheses eagerly ('eager wrapping' was introduced at https://github.com/nodejs/node/pull/31943) and `{ a: 1 }['a']` is converted into an ExpressionStatement `({ a: 1 }['a'])` that is evaluated to `1`. However, technically speaking, `{ a: 1 }['a']` should be parsed as the combination of a BlockStatement `{a:1}` and an ExpressionStatement `['a']`, yielding a result of `['a']`.\r\n\r\nThe results of `{ a: 1 }['a']` in other runtimes:\r\n- ChromeDevTools: `['a']`\r\n- Safari WebInspector: `['a']`\r\n- Deno REPL: `1`","author":{"url":"https://github.com/cola119","@type":"Person","name":"cola119"},"datePublished":"2022-12-24T15:21:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/45964/node/issues/45964"}