Promise polyfill/shim in Chrome appears to swallow unhandled rejections

[mmoss]

Chrome Native Promise without Rejection Handler:

Transcompiled using Babel without a Rejection Handler in Chrome:
No indication that something's gone awry

[zloirock]

Looks on the result - it's not core-js Promise, rather es6-promise overrides it.

core-js replaces native Promise in actual Chromium, but instead of es6-promise, core-js supports unhandled rejection tracking.

So remove es6-promise from your project.

[mmoss]

For anyone who runs into this, it's been logged here: stefanpenner/es6-promise#70