TypeScript Version: 4.0.0-beta

Search Terms:

variadic tuples promise.all

Code

declare const foo: Promise<string>;
declare const bar: Promise<number>[];

async function m() {
    const p = await Promise.all([
        foo,
        ...bar
    ])
}

Expected behavior:

p should have type [string, ...number]

Actual behavior:

Type error

Playground Link: https://www.typescriptlang.org/play/?ts=4.0.0-dev.20200728&ssl=9&ssc=2&pln=1&pc=1#code/CYUwxgNghgTiAEYD2A7AzgF3gMyUgXPAAoxIC2AlmiADyYwUoDmAfANwCwAUKJLAsnRYARrEIlyVWigCuZYSBgsA2gF1OXblDQBPFGBwz9GCqnhkAFAEp4Ab27xHiVJngAHeAF54UAO5QKLAlKagA6KAgIC2UHJzjcJAAaWLjHUPTRGBT4VStuAF8gA

Related Issues: none