In Chrome 42, throwing an error explicitly produces no stack trace unless
you add .-stack like so:
(throw
(.-stack (js/Error.
"invalid types: expected :cursor-id and
:transform or [:sub-path]"))
the problem with doing this is that you end up with a JS stack trace
I think you're saying that in Canary you can throw js/Error without
the .-stack and it will
show a CLJS stack trace? If so, that's heaven sent...
On Fri, May 8, 2015 at 6:07 AM, Mike Thompson <[email protected]>
wrote:
> Just in case you don't now this ...
>
> Right now, if you are debugging ClojureScript, you need to be using Chrome
> 44 (currently Canary).
>
> Why? Probably many reasons, but one in particular ...
>
> If a thrown exception is caught and then rethrown, in Chrome 42 (Stable)
> the uncaught exception handler does not display a stacktrace. It just
> displays the exception text. (Asserts display okay, but most other
> exceptions do not).
>
> Whereas, Chrome 44 (Canary) displays both the exception text and the stack
> trace correctly. And that's absolute gold when you are debugging. The
> difference between the exception text and the complete stacktrace is chalk
> and cheese.
>
> If you are using core.async this is especially relevant because go-loops
> catch exceptions, cleanup and then re-throw them. And, as I said above, it
> is these rethrown exceptions which Chrome 42 doesn't seem to handle well.
>
> But even for code not using core.async it is useful: For example, Reagent
> catches exceptions and re-throws them, and this has proved a problem:
> https://github.com/reagent-project/reagent/issues/120
>
> If you are forced to use Chrome 42 then this might work also (untested):
> (set! (.-onerror js/window) #(.error js/console (.-stack %1)))
>
> Although, in prod, you might want more curation around exceptions.
>
> --
> Mike
>
>
>
>
>
>
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