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Wrong tuple inference of async IIFE return value #44992
Description
Bug Report
🔎 Search Terms
tuple, array, promise, async, function, inference
🕗 Version & Regression Information
v4.3.5
⏯ Playground Link
Playground link with relevant code
💻 Code and behavior
// ❌ Type '(string | number)[]' is not assignable to type '[one: number, two: string]'.
const nowork: Promise<[one: number, two: string]> = (async () => {
return [1, 'two'];
})();🙂 Expected behavior
As with supplying an instance of Promise, correctly infer returned value as assignable to the variable.
// ✅
const yeswork: Promise<[one: number, two: string]> = new Promise(
(resolve) => resolve([1, 'two']),
);
Activity
RyanCavanaugh commentedon Jul 12, 2021
Also works: