Re: Race condition in threading code?

["Han-Wen Nienhuys" <hanwenn@gmail.com>]

It could be an existing problem that is exposed by the new tighter allocation.
With a larger heap, there are larger intervals between recollection of the heap.

Let me run this through DEBUGINFO when I get the chance.


On Tue, Aug 26, 2008 at 5:23 PM, Andy Wingo <wingo@pobox.com> wrote:
> Hi,
>
> On Sat 16 Aug 2008 11:45, Han-Wen Nienhuys <hanwen@xs4all.nl> writes:
>
>> Julian Graham escreveu:
>>> Hmmm... I don't recall seeing those when I was writing that test
>>> suite.  Just to be clear, were you getting those errors before making
>>> your changes?
>>
>> No, but some very unrelated changes made them go away again.
>
> I still get that error, having merged master into vm. Do you have other
> fixes?
>
> The original error that you had, reflowed:
>
> ERROR: srfi-18.test: thread-start!:
>  thread activates only after start
>   - arguments: ((syntax-error "memoization"
>                  "In file ~S, line ~S: ~A ~S in expression ~S."
>                  ("/home/lilydev/vc/guile/srfi/srfi-18.scm" 135
>                   "Bad binding" ct
>                    (let (ct (current-thread))
>                    #@let (or (hashq-ref thread-exception-handlers ct)
>                          (hashq-set! thread-exception-handlers ct
>                    (list initial-handler))))) #f))
>
> Bad binding with an #@let???? This would seem to indicate that a
> memoized cell was not marked, and was then swept/re-used.
>
> Andy
> --
> http://wingolog.org/
>



-- 
Han-Wen Nienhuys - hanwen@xs4all.nl - http://www.xs4all.nl/~hanwen