UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.85 Safari/537.36 Vivaldi/2.2.1388.34

Steps to reproduce the problem:
Run the code
```js
var Foo = function(){};

Object.defineProperty(Foo.prototype,'x',{
    get(){
        return 3;
    }
});

var foo = new Foo();

console.dir(foo);
```

Also happens with `console.log` instead of `console.dir`, or when there's a setter alongside the getter.

What is the expected behavior?
The log should show

Foo {
    __proto__:{
        constructor: ƒ (),
        x: 3,
        __proto__: Object
    }
}

What went wrong?
The log shows

Foo {
    x: 3,
    __proto__:{
        constructor: ƒ (),
        x: 3,
        __proto__: Object
    }
}

It includes the `x` property (first shown as "(...)" with the "invoke property getter" tooltip) on the object itself, not only on the prototype.

Did this work before? Yes 

Chrome version: 70.0.3538.110  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

Found at https://stackoverflow.com/questions/53816004/what-happens-when-invoke-object-defineproperty-for-a-functions-prototype