Result of { ...Array<T> } is assignable to Array<T>

[abliarsar]

TypeScript Version: 3.8.3

Search Terms: array, object spread.

Code

const fn = (wut: Array<number>): Array<number> => ({ ...wut})

fn([]).map(() => 1) // No type error, but runtime will crash

Expected behavior: Error
Actual behavior: No error

Playground Link

[MartinJohns]

Duplicate of #34780.

[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.