From: yang...@google.com [mailto:yang...@google.com] On Behalf Of Yang Guo
> var p = new Promise(function(resolve) { resolve() });
> p.then(function() { return Promise.reject("foo"); });
>
> I'll change the CL to call the callback twice then.
Right, this is a good example. In this case I'd expect %PromiseRejectEvent
twice and %PromiseRevokeReject once. Expanding:
var x = Promise.resolve();
var y = p.then(function() { var z = Promise.reject("foo"); return z; });
Here I'd expect %PromiseRejectEvent(z, "foo"), then %PromiseRevokeReject(z),
then %PromiseRejectEvent(y, "foo"). So the stable state is that you have an
unhandled rejection for y with reason "foo", as
Attempts to reduce the "chattiness" when you know for sure that you'll be
revoking soon make some sense, but I'm not sure how to do that in general. E.g.
when creating `z` I don't see how you'd know that the next line is `return z`
within a promise-then callback.
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