[racket] gc crash on raspbian

Hi all,

With Franco's help I have 6.0.1 on the Pi, still crashes, but now looks
like this:

Seg fault (internal error during gc) at 0xb46ac000
SIGSEGV SEGV_ACCERR SI_CODE 2 fault on 0xb46ac000
Aborted

cheers,

dave


On 01/07/14 13:10, 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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