What is this?

Simple script to demonstrate a bug with async functions and the core-js Promise.prototype.finally polyfill.

How to run?

$ npm install $ npm run webpack

Open index.html in a browser (either the file or through a server like python -m http.server) and open devtools or run node out.js.

Expected Output

If you see [!!!] something went terribly wrong.

async returns global Promise? true
Promise has finally? true
async has finally? true
[promise-fn][promise-calls][resolve] should work
[promise-fn][promise-calls][resolve] should always print
[promise-fn][promise-calls][reject] should fail
[promise-fn][promise-calls][reject] should always print
[async-fn][async-await-calls][resolve] should work
[async-fn][async-await-calls][resolve] should always print
[async-fn][async-await-calls][reject] should fail
[async-fn][async-await-calls][reject] should always print
[async-fn][promise-calls][resolve] should work
[async-fn][promise-calls][reject] should fail
[promise-fn][async-await-calls][resolve] should work
[promise-fn][async-await-calls][resolve] should always print
[promise-fn][async-await-calls][reject] should fail
[promise-fn][async-await-calls][reject] should always print