[Lazarus] Debugging the rtl/fcl - segfault in sdfdataset

[Michael Van Canneyt]

On Thu, 16 Jul 2020, Luca Olivetti wrote:

> El 16/7/20 a les 8:55, Luca Olivetti via lazarus ha escrit:
>> El 15/7/20 a les 18:26, Luca Olivetti via lazarus ha escrit:
>> 
>>>> For the record, the segfault happens here
>>>> 
>>>> 
>>>> #0 SYSGETMEM_FIXED(544) at ../inc/heap.inc:963
>>> 
>>> The memory is hosed, I still don't know why.
>>> I managed to reproduce the problem with a simple lazarus program, however 
>>> a plain pascal program  that does the same doesn't trigger the it.
>>> 
>>> I'm attaching the lazarus project as well as the simple pascal program if 
>>> somebody could look into it...
>> 
>> 
>> I reported it here
>> 
>> https://bugs.freepascal.org/view.php?id=37370
>
> I found that reverting
>
> https://svn.freepascal.org/cgi-bin/viewvc.cgi?view=revision&revision=43245
>
> (in fact I just took sdfdata.pp from 3.0.4)
>
> fixes the segfault.
>
> Michael, what do you think?

Seems like a bug somewhere. I'll need to look at it. Probably has something
to do with the default codepage: Lazarus changes that.

Michael.