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This has been my biggest pain point with Promises, I have spent hours trying to debug an issue only to find out I hadn't used an error handler in a Promise somewhere and an error was being thrown. It is so frustrating.

I know some Promise libraries have an option to report unhandled errors which makes life a lot easier but there really should be something natively too.

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process.on('unhandledRejection', function(promise,reason) {` since io.js 1.3

I haven't looked at io.js in a short while. Does it log to console.error by default (like Chrome now does)?

This mistake is going to be most frustrating for those who don't realize that "unhandledRejection" is a case they even need to consider. People learning JS and having nothing happen when they run (erroneous) code are going to be pulling their hair out.

This is currently being discussed in io.js (and remember it's being backported to the main NodeJS branch). Feel free to come participate in the discussion.

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