TypeScript Version: 2.4.0 / nightly (2.5.0-dev.201xxxxx)

2.4.1 and 2.5.0-dev.20170629 and 2.5.0-dev.20170707

Code

interface Foo {
    cat: string
    bar: number
}

type Bar = Partial<Foo>

const notBar: Bar = () => { } // passes on 2.4.1 and 2.5.0-dev.20170629 and 2.5.0-dev.20170707

Expected behavior:

Partials should not accept functions

Actual behavior:

Partials accept functions

typescript-playground-example

Related Issues:

13132 has been marked as a duplicate of 7485 which has been closed

7485 is meant was meant to be closed by 16047 which has merged.

Edit: updated after testing on latest nightly and simplified example code