[racket] gc crash on raspbian

For what it's worth, a build using the "Source + built packages"
download for v6.0 or v6.0.1. should be relatively fast. Using that
distribution will compile C sources for the run-time system, but it
will use pre-built bytecode and documentation.

Similarly, the "Source + built packages" variant of Minimal racket
should be relatively fast to install and relatively small, and
installing packages afterward should download pre-built variants (at
least for packages that are in the main distribution) that install
quickly.

At Tue, 1 Jul 2014 13:10:46 +0100, Franco Raimondi wrote:
> I managed to compile v6.0 on Raspbian, let me know if you are interested and I 
> can share it with you via dropbox or something similar.
> 
> Franco
> 
> 
> On 1 Jul 2014, at 13:05, David Griffiths <dave at pawfal.org> wrote:
> 
> > Hi Matthew,
> > 
> > Just to report back, I just upgraded to v5.3.5 on the Pi (after a 48hr
> > build :) and still getting this problem.
> > 
> > I'll try and narrow it down - the SQLite api is the first thing to
> > isolate I guess...
> > 
> > cheers,
> > 
> > dave
> > 
> > On 02/05/14 22:58, Matthew Flatt wrote:
> >> 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
> >>>>> ____________________
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> >>>> 
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