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Date: Fri, 20 May 2016 10:06:05 +0100
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Subject: Re: [PHP-DEV] Exception::getLine()
From: rowan.collins@gmail.com (Rowan Collins)

On 20/05/2016 08:22, Niklas Keller wrote:
> 2016-05-20 4:13 GMT+02:00 Jesse Schalken <me@jesseschalken.com>:
>> The top frame is the construction (get_error) and the site of the throw
>> (do_throw) doesn't appear in the stack at all.
>>
>
> The comparison with JavaScript isn't a good one, since you can throw
> everything in JS. If they didn't provide the stack trace upon throw, you
> would not have a stack trace at all if you throw a plain string.
>


That explanation justifies completely the opposite behaviour to what 
Jesse described.

According to MDN [1] the "stack" property is completley unstandardised, 
and some engines may indeed populate it on throw, but there's no hint on 
that page that they'll attach it to anything not constructed as an Error.

So it's not a great comparison for either side (note that it was 
originally brought up by Rasmus as an example where it *does* come from 
the throw site) because the language doesn't actually guarantee you a 
stack trace at all.

[1] 
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/stack

Regards,
-- 
Rowan Collins
[IMSoP]