Error stack

[Geoffrey Sneddon]

On 10/06/12 23:57, John Tamplin wrote:
> On Sun, Jun 10, 2012 at 9:56 AM, Geoffrey Sneddon<gsneddon at opera.com>wrote:
>
>> It's not just Firefox addons that will break: GWT's output relies upon the
>> exact format of Error.stack[1]. I know Google Wave depended upon this, and
>> I believe other Google applications do too.
>>
>
> Note that GWT can supply different deferred-bound implementations for
> different browsers, though generally we do runtime detection rather than
> compile time if there are few differences between versions.  Of course,
> that would only affect deployed apps if they recompiled, but I wouldn't
> expect that would be much of a problem for any currently maintained apps.

Well, the Wave team only shipped Gecko/WebKit code, so you *had* to be 
compatible with either one of the compile-time branches if you wanted to 
have a browser that supported Wave. The fact it *can* support different 
implementations is only relevant if people ship the code. :)

To be fair, I've only seen a few things that have relied upon 
Error.stack (all through GWT and not shipping all the various 
compile-time options!) and I think they were all Google sites, so 
hopefully they'd all be updated, allowing convergence of Error.stack 
implementations.

(Though it is perhaps saying about maintenance of that code that the 
Opera code-branch relies upon Futhark behaviour, which hasn't been 
shipped in desktop or mobile for over two years now, and the specific 
behaviour it relies on depends upon a non-standard pref setting that 
didn't even exist in mobile.)

-- 
Geoffrey Sneddon — Opera Software
<http://gsnedders.com>
<http://opera.com>