Return value of higher order functions looses excess property checks

[essenmitsosse]

TypeScript Version: 3.9.2 (doesn't work in any version I tested, including 4)

Search Terms:
higher order function return value object excess property check

Code

interface Foo {
	foo: {
		bar: number
	}
}

// Error for unknown property buz
const getFoo = (): Foo => ({
	foo: {
		bar: 1,
		buz: 2,
	}
})

// Typeing should be the same. Autocomplete works, but no error is shown for the excessive property buz
const getFoo3 = (): () => Foo => () => ({
	foo: {
		bar: 1,
		buz: 2
	}
})

// Same problem as above. The issue doesn't seem to be directly related to higher order functions
const getFoo2: () => Foo = () => ({
	foo: {
		bar: 1,
		buz: 2,
	}
})

Expected behavior:
Error should be thrown for the excess property in all cases.

Actual behavior:
Error for excess properties is only thrown, when the return value of the function is directly typed.

Playground Link

Related Issues: -

[RyanCavanaugh]

Duplicate #241

[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.