When spread array into object literal, Returns a type containing unnecessary properties

[GunseiKPaseri]

Bug Report

🔎 Search Terms

Spread Syntax, Array into object literal

🕗 Version & Regression Information

This is the behavior in every version I tried, and I reviewed the FAQ for entries about rest syntax.

⏯ Playground Link

Playground link with relevant code

💻 Code

const x = ["a", "b", "c"]
console.log(x)
const y = {...x}
//    expected {[x: number]: string} etc, but got {[x: number]: string, length: number, toString(): string .....}

console.log(y.length) // undefined
//  expected undefined, but got number

🙁 Actual behavior

y(spread array into object literal) 's property type is same as Array

🙂 Expected behavior

y(spread array into object literal) 's property has only array value.

[MartinJohns]

Essentially a duplicate of #9726.

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.