broken-promise.js

'use strict'

function run (fn) {
  let { promise, resolve, reject } = Promise.withResolvers()

  let p = fn()
  p.then(resolve, reject)
  // p.finally(() => {}) // -- uncomment for a surprise

  return promise
}

async function main () {
  try {
    await run(() => Promise.reject(new Error('oh no')))
  } catch (err) {
    console.log('failed')
  }
}

main().then(
  () => console.log('ok'),
  () => console.log('not ok')
)