[racket] Exception Stack Trace Troubles

What architecture?

Robby

On Tue, Jun 26, 2012 at 2:37 AM, Chad Albers <calbers at neomantic.com> wrote:
> I'm using Debian Linux.
> --
> Chad Albers
>
>
> On Sun, Jun 24, 2012 at 10:08 PM, Matthew Flatt <mflatt at cs.utah.edu> wrote:
>> What platform are you using?
>>
>> If it's Win64, the problem is likely Racket's weak support for getting
>> a backtrace on that platform (when the JIT is enabled).
>>
>> At Sun, 24 Jun 2012 22:01:02 +0900, Chad Albers wrote:
>>> Hi Eli,
>>>
>>> Thanks for you help.  Unfortunately, it doesn't seem to work.  I
>>> literally cut the code and pasted in a rkt file with #lang racket at
>>> the top.  I ran it with the racket CLI, and received: '()
>>>
>>> Should I be invoking the CLI with some option?  Any other ideas?
>>>
>>> --
>>> Chad
>>>
>>>
>>> On Sun, Jun 24, 2012 at 2:08 PM, Eli Barzilay <eli at barzilay.org> wrote:
>>> > A few minutes ago, Chad Albers wrote:
>>> >> Hi,
>>> >>
>>> >> Is there some sort of 'secret' to acquiring the stack trace of an
>>> >> exception?  It is my understanding that when an exception is raised
>>> >> with the 'error' procedure in creates a exn:fail structure that has
>>> >> a message field and a continuation-marks field.  Presumably the
>>> >> stack trace is in the continuation-marks field.  To actually get the
>>> >> stack trace I need to call the following:
>>> >>
>>> >> (continuation-mark-set->context (exn-continuation-marks exception))
>>> >
>>> > This should work -- for example, I see a stack trace with:
>>> >
>>> >  (with-handlers ([void (λ (e) (continuation-mark-set->context
>>> >                                (exn-continuation-marks e)))])
>>> >    (+ 1 "two"))
>>> >
>>> >
>>> >> However, whenever I call this, it yields an empty list: () - Not a
>>> >> stack trace.
>>> >
>>> > That can happen from running code in threads which start from an empty
>>> > context.  For example, doing the above in a thread:
>>> >
>>> >  (thread (λ () (printf "~s\n" ...same...)))
>>> >
>>> > shows an empty trace.
>>> >
>>> > --
>>> >          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
>>> >                    http://barzilay.org/                   Maze is Life!
>>>
>>> ____________________
>>>   Racket Users list:
>>>   http://lists.racket-lang.org/users
>
> ____________________
>  Racket Users list:
>  http://lists.racket-lang.org/users