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[Bug 26517] Methods that return promises are unable to throw exceptions

From: <bugzilla@jessica.w3.org>
Date: Tue, 07 Oct 2014 17:55:06 +0000
To: public-script-coord@w3.org
Message-ID: <bug-26517-3890-Me3MPiUMyq@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=26517

--- Comment #25 from Olli Pettay <bugs@pettay.fi> ---
(In reply to Jonas Sicking from comment #22)
> I don't know of any APIs which have synchronous side-effects and which also
> return a promise. So you can't rely on anything having successfully happened
> on the line after the .foo() call anyway.
Just passing wrong types of params to foo. It is not really a side-effect, but
a basic type validation (or whatever term the spec uses).
And I'm not interested in the success case, I'm interested in the case when an
error has occurred. That information should be given to the caller asap.

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