[racket] gc crash on raspbian

Version 5.2.1 seems like a long time ago (only two years? really?), and
some GC bugs have been fixed since then. Is upgrading to v6.0 possible?
We're offering a free ARM JIT with every upgrade!

While 7 would be surprisingly close to a valid value for a random
`int`, it turns out that the object header has only 3 bits to hold that
value, so 7 is actually as far away as possible from a valid value.

At Fri, 02 May 2014 22:44:43 +0100, David Griffiths wrote:
> Hi Matthew,
> 
> Sorry, I was a bit short on details, I'm running 5.2.1, also using
> sqlite via jaymccarthy/sqlite:5:1/sqlite on planet.
> 
> I had assumed it would be some kind of memory corruption, but "7" looks
> a bit more specific than I'd expect for that (like some kind of specific
> error value as it's one more than the PAGE_X types)...
> 
> I'll try and narrow it down a little, e.g. without sqlite and see what
> happens.
> 
> cheers,
> 
> dave
> 
> On 02/05/14 19:39, Matthew Flatt wrote:
> > That means something has gone generally wrong with memory management.
> > 
> > Do you have a way to replicate the crash? I tried simply running the
> > web server, but I imagine there's a little more to it.
> > 
> > At Fri, 02 May 2014 14:09:01 +0100, David Griffiths wrote:
> >> Hi all,
> >>
> >> I'm running a racket web server on a Raspberry Pi, and occasionally
> >> getting aborts with:
> >>
> >> Unhandled info->type 7
> >>
> >> Which I've tracked down to src/racketgc2/newgc.c
> >> Any pointers how what this could be and how to fix/work around it?
> >>
> >> cheers,
> >>
> >> dave
> >> ____________________
> >>   Racket Users list:
> >>   http://lists.racket-lang.org/users
> >