[racket-dev] Contract violation from custodian shutdown

I think I've fixed the problem, and I re-enabled the custodian
callback. Let me know if you see further problems, of course.

At Mon, 10 Dec 2012 11:41:58 -0700, Neil Toronto wrote:
> Randomly. It didn't happen often... maybe 1 in 15 times? I think you 
> could open and run this program in a tab and then immediately close it:
> 
> #lang racket
> (require math/bigfloat)
> 
> Do that a lot, and you might see it. :/ You'd have to reenable the 
> custodian shutdown callback.
> 
> On 12/10/2012 08:57 AM, Matthew Flatt wrote:
> > It's hard to say where the bug is, but there may be some problem in the
> > implementation of custodians of `register-custodian-shutdown'. Is it
> > repeatable?
> >
> > At Thu, 06 Dec 2012 16:48:37 -0700, Neil Toronto wrote:
> >> I just got this message on my console, I think after closing a tab,
> >> which coincided with DrRacket hanging:
> >>
> >>
> >> eventspace-shutdown?: contract violation
> >>     expected: eventspace?
> >>     given: #<procedure:mpfr_free_cache>
> >>     context...:
> >>      /home/neil/plt/collects/mred/private/wx/common/queue.rkt:201:0:
> >> shutdown-eventspace!
> >>
> >>
> >> It's obviously because of this code, which is near the top of
> >> "math/private/bigfloat/mpfr.rkt":
> >>
> >>
> >> (define mpfr-free-cache (get-mpfr-fun 'mpfr_free_cache (_fun -> _void)))
> >>
> >> (define mpfr-shutdown
> >>     (register-custodian-shutdown mpfr-free-cache (λ (free) (free))))
> >>
> >>
> >> Did I misunderstand something, or is this someone else's bug?
> >>
> >> Neil ⊥
> >> _________________________
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