René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"doc:Error:captureStackTrace description inaccurate","articleBody":"From at least Node 4.2 the [documentation](https://nodejs.org/dist/latest-v4.x/docs/api/errors.html#errors_error_capturestacktrace_targetobject_constructoropt) says:\n\n> The first line of the trace, instead of being prefixed with `ErrorType:\n> message`, will be the result of calling `targetObject.toString()`.\n\nThis test program:\n\n```\nvar assert = require('assert');\n\nfunction X(msg) {\n  this.message = msg;\n}\nX.prototype.name = 'X';\nX.prototype.toString = function() { return 'toString'; }\n\nvar x = new X('something');\nassert.deepEqual(x, {message: 'something'});\nassert.equal(x.toString(), 'toString');\n\nError.captureStackTrace(x);\nassert.equal(x.stack.split('\\n')[0], 'X: something');\n```\n\nproves the description incorrect.  The first line is produced by `deps/v8/src/messages.js` in `ErrorToStringDetectCycle` from the `name` and `message` properties of `targetObject` with this logic:\n\n```\nif (name === \"\") return message;\nif (message === \"\") return name;\nreturn name + \": \" + message;\n```\n\nwhere `name` defaults to `\"Error\"` and `message` defaults to `\"\"`.\n\nI'm not good at user-facing technical documentation so I'd rather not try to craft replacement text for something that complex.\n","author":{"url":"https://github.com/pabigot","@type":"Person","name":"pabigot"},"datePublished":"2016-03-12T13:07:11Z","url":"https://github.com/nodejs/node/issues/5675"}