rethrow should keep the backtrace of the original 'die'

[coke]

Originally reported in:  http://rt.perl.org/rt3/Ticket/Display.html?id=60044

The crucial bit here is:

On Thu, Oct 23, 2008 at 08:04:41PM -0700, Allison Randal wrote:
>
> I don't understand the problem. Is it that you expect 'rethrow' to keep 
> the stack trace of the original 'die'?

...this is what I would expect. If I catch and then rethrow an
exception, I'd expect the stack trace to continue to show the
location of the original throw, not the location of the
rethrow.

Pm

[whiteknight]

I'm playing around with this issue in the exception_backtraces branch.

[whiteknight]

This is done now in the exception_backtraces branch, minus some tweaks. I'm going to send an email to the list and will be looking for testers and feedback about the new algorithm.

[whiteknight]

This is done now and has been for some time. The Exception.backtrace_strings() method returns an array of strings, one for each throw/rethrow in the exception history. If problems are found with this solution or it has bugs or whatever, we can open new tickets.