[Scilab-users] [EXTERNAL] Re: scilab 6.00 beta2 crash (feedback)

[Paul Bignier]

My bad, a 50001*50001x1 vector!

Paul


On 09/28/2016 04:05 PM, Carrico, Paul wrote:
>
> Ok for bugzilla (sorry for that)
>
> /_Nota_/:  k is a vector ….. at least in Scilab 5.5.4
>
> */EXPORT CONTROL :
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> *De :*users [mailto:users-bounces at lists.scilab.org] *De la part de* 
> Paul Bignier
> *Envoyé :* mercredi 28 septembre 2016 15:57
> *À :* Users mailing list for Scilab
> *Objet :* [EXTERNAL] Re: [Scilab-users] scilab 6.00 beta2 crash (feedback)
>
> Hi Paul,
>
> The line "k =[1:n]'.*.ones(n,1);" intends to produce a 50001x50001 
> (total 2.5 billion) matrix, which goes over the int32 limit of 
> 2147483647 (2.147 billion), that provokes the inner sizes to wrap and 
> become negative, leading to the crash.
>
> If you try k =[1:n/2]'.*.ones(n/2,1); it will work but eat up your 
> ram. If you try it a few times a message will say "Can not allocate 
> 'XXX' MB memory." because it can still deal with such sizes.
>
> So are you sure about what you want to do?
>
> In the future when you get crashes, please report them on the bugzilla 
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__bugzilla.scilab.org_&d=DQMD-g&c=0hKVUfnuoBozYN8UvxPA-w&r=4TCz--8bXfJhZZvIxJAemAJyz7Vfx78XvgYu3LN7eLo&m=H6mcS5tjsl64h14eEzr1mZ3dh6VLpl9do8_bq2DWILQ&s=5d-roj75J3VoA5OprGpyNJA3SfhZiZGqF1lXCP2jaV8&e=>.
>
> Thank you,
>
> Best regards,
>
> Paul
>
> On 09/28/2016 03:34 PM, Carrico, Paul wrote:
>
>     Hi all,
>
>     Here is a feedback of a crash of  scilab 6.00 beta2; I used the
>     code here bellow on a 32 Go CentOS 7 machine.
>
>     Ligne 951 : 2650 Erreur de segmentation (core dumped) 
>     ‘’$SCILABBIN’’ ‘’$@’’
>
>     t =[0:2e-5:1]';
>
>     n =size(t,"*");
>
>     X =zeros(n,1);
>
>     k =[1:n]'.*.ones(n,1);
>
>     m =ones(n,1).*.[1:n]';
>
>     nl =size(m,"*");
>
>     tmp =zeros(nl,1);
>
>     Paul
>
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>
>
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> -- 
> Paul BIGNIER
> Development engineer
> -----------------------------------------------------------
> Scilab Enterprises
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-- 
Paul BIGNIER
Development engineer
-----------------------------------------------------------
Scilab Enterprises
143bis rue Yves Le Coz - 78000 Versailles, France
Phone: +33.1.80.77.04.68
http://www.scilab-enterprises.com

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