Karim BELABAS on Thu, 9 Oct 2003 21:32:35 +0200 (MEST)


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Re: polredabs failure


On Thu, 9 Oct 2003, Igor Schein wrote:
> On Thu, Oct 09, 2003 at 09:04:42PM +0200, Karim BELABAS wrote:
>> A complicated typo. The smallest element was found, then deleted due to a typo
>> which assessed to it the norm of another (larger) element, during the
>> "Sorting" phase (when there are too many small vectors, the list overflows,
>> and we need to discard some of them). Fixed in CVS.
>
> Immediate regression:
>
> ? allocatemem()
>   ***   Warning: doubling stack size; new stack = 8000000 (7.629 Mbytes).
> ? polredabs(x^16-4*x^15+16*x^13-48*x^11+16*x^10-32*x^9+360*x^8-616*x^7+352*x^6-112*x^3+96*x^2-32*x+4)
>   ***   bug in GP (Segmentation Fault), please report

The (delicate) old GC scheme did not work due to my slightly careless
modification. Fixed.

Thanks !

    Karim.
-- 
Karim Belabas                     Tel: (+33) (0)1 69 15 57 48
Dép. de Mathématiques, Bât. 425   Fax: (+33) (0)1 69 15 60 19
Université Paris-Sud              http://www.math.u-psud.fr/~belabas/
F-91405 Orsay (France)            http://www.parigp-home.de/  [PARI/GP]