Incorrect capturing of stacktrace in custom errors

[rostik404]

After babel transformation, custom error loses its stacktrace because of incorrect value in _this.constructor.

Input Code

Here is a simple example of custom js Error:

Test = class Test extends Error {
    constructor() {
        super();
        Error.captureStackTrace(this, this.constructor)
        console.log('Constructor: ', this.constructor);
    }
}

const e = new Test('some-error')
console.log('Stack: ', e.stack);

I'm expecting to get Test in constructor and full stacktrace in e.stack, and everything works as I expect:

Constructor:  class Test extends Error {
    constructor() {
        super();
        Error.captureStackTrace(this, this.constructor)
        console.log('Constructor: ', this.constructor);
    }
}
Stack:  Error
    at Object.<anonymous> (/Users/rostik404/projects/test-project/test-error.js:42:11)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Function.Module.runMain (module.js:441:10)
    at startup (node.js:139:18)
    at node.js:974:3

After babel transformation, I'm getting this code:

var Test = function (_Error) {
    _inherits(Test, _Error);

    function Test() {
        _classCallCheck(this, Test);

        var _this = _possibleConstructorReturn(this, (Test.__proto__ || Object.getPrototypeOf(Test)).call(this));

        Error.captureStackTrace(_this, _this.constructor);
        console.log('Constructor: ', this.constructor);
        return _this;
    }

    return Test;
}(Error);

var e = new Test('some-error');
console.log('Stack: ', e.stack);

And in this code, I'm getting Error in _this.constructor instead of Test and because of this Error.capturestacktrace cuts the whole stacktrace:

Constructor:  function Error() { [native code] }
Stack:  Error

Babel Configuration (.babelrc, package.json, cli command)

Using babel online

Expected Behavior

Full stacktrace in custom Error

Current Behavior

Cut stacktrace and incorrect value in _this.constructor

Your Environment

software	version(s)
Babel	v6.26.0
node	v8.4.0
npm	v5.3.0
Operating System	macOS Sierra v10.12.4

[babel-bot]

Hey @rostik404! We really appreciate you taking the time to report an issue. The collaborators
on this project attempt to help as many people as possible, but we're a limited number of volunteers,
so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack
community that typically always has someone willing to help. You can sign-up here
for an invite.

[loganfsmyth]

.name is Error because we don't support extending builtin types out of the box: https://babeljs.io/docs/usage/caveats/#classes

That said, even using that builtin-extend plugin, which makes .name Test, the stack trace itself does seem to still contain Error. I'm not sure there's anything we can do there, I have no idea how Chrome decides what to use when building traces.

We likely can't easily fix that.

[hzoo]

I guess we'll close then? Can try #4480 (comment)