René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"vm.runInContext: eval a strict function","articleBody":"Evaluated strict functions, when ran inside `vm.ranInContext` do not capture environment.\n\nThis works (file `test.js`):\n\n``` js\nvar code = `\nvar foo = {m: 1};\n\nfunction bar() {\n  \"use strict\";\n  return foo;\n}\n`;\n\neval(code);\n\nbar();\n```\n\nNode session:\n\n```\n\u003e vm.runInNewContext(fs.readFileSync('/Users/dmitrys/test.js', 'utf-8'))\n{ m: 1 }\n\u003e\n```\n\nThis doesn't:\n\n``` js\nfunction main() {\n\n  var code = `\n    var foo = {m: 1};\n\n    function bar() {\n      \"use strict\";\n      return foo;\n    }\n  `;\n\n  eval(code);\n\n  bar(); // foo is not defined\n\n}\n\nmain();\n```\n\nNode session:\n\n```\n\u003e vm.runInNewContext(fs.readFileSync('/Users/dmitrys/test.js', 'utf-8'))\nundefined:6\n      return foo;\n             ^\nReferenceError: foo is not defined\n    at bar (eval at main (evalmachine.\u003canonymous\u003e:13:8), \u003canonymous\u003e:6:14)\n    at main (evalmachine.\u003canonymous\u003e:15:3)\n    at evalmachine.\u003canonymous\u003e:19:1\n    at ContextifyScript.Script.runInNewContext (vm.js:18:15)\n    at Object.exports.runInNewContext (vm.js:49:17)\n    at repl:1:4\n    at REPLServer.defaultEval (repl.js:154:27)\n    at bound (domain.js:254:14)\n    at REPLServer.runBound [as eval] (domain.js:267:12)\n    at REPLServer.\u003canonymous\u003e (repl.js:308:12)\n```\n\nAlso the code works if there is no `\"use strict\"` for `foo`.\n","author":{"url":"https://github.com/DmitrySoshnikov","@type":"Person","name":"DmitrySoshnikov"},"datePublished":"2015-07-25T06:19:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":15},"url":"https://github.com/2245/node/issues/2245"}