Object literal getters and setters doesn't work after spread syntax (ES2017 and below)

Bug Report

The getters/setters will become normal/plain properties if a spread assignment is used before them.

🔎 Search Terms

Getter, setter, spread

🕗 Version & Regression Information

4.3.5

⏯ Playground Link

Playground link with relevant code

💻 Code

var Foo = {
    key: 'value'
}
var Bar = {
    ... Foo,  // this breaks the getters/setters after it.    
    get name() { console.log(9); return this._name },
    set name(name) { this._name = `1${name}`},
    _name: '',
}

🙁 Actual behavior

name setter and getter on the Bar object are “removed” and replaced with a plain name property, given that after compilation, the method used is Object.assign to piece the objects together.

🙂 Expected behavior

Getters and setters on Bar should still remain.

Beginne mit dem verlinkten Playground und dem Beispiel für Spread in Objektliteralen, und untersuche dann das ES2017-and-below-Emit, das Object.assign verwendet. Vergleiche das generierte Verhalten mit dem erwarteten Getter- und Setter-Verhalten; fertig ist es, wenn die Accessors auf Bar nach der Kompilierung funktionsfähig bleiben.