Return type inference error with async functions and Promise.reject()

TypeScript Version: 3.0.1

Code

async function often() {
    if (false) {
        return Promise.reject();
    }
    // code
}

let sometimes = often();
sometimes = Promise.resolve();

Actual behavior:

error TS2322: Type 'Promise<void>' is not assignable to type 'Promise<never>'.

Playground Link: here

[zombie]

Thank you, though the issue is not how to work around it, but that Typescript erroneously infers the return type of the function.

[zombie]

Also, pressed the wrong button.