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Bill Allombert on Fri, 12 Jul 2024 19:25:30 +0200
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- To: Pari Developers Mailing List <pari-dev@pari.math.u-bordeaux.fr>
- Subject: Re: Segfault in read()
- From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
- Date: Fri, 12 Jul 2024 19:25:14 +0200
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On Fri, Jul 12, 2024 at 08:18:14AM -0700, Ilya Zakharevich wrote:
> On Thu, Jul 11, 2024 at 07:06:32PM -0700, Ilya Zakharevich wrote:
> > Reading the attached file (created on Windows 7 in the same session by
> > the latest stable version) leads to a segfault.
>
> Bill asks me how this file was created. It is the only way I know to
> debug “a failing” PARI construct.
>
> OUT=[1];
> Data = Start␣a␣failing␣code; OUT[1] = Data; Fun␣code␣which␣crashes();
>
> Only I put writebin(Data) in between too. The literal excerpt:
>
> if(dbg, writebin("pos.wrbin",pos); POS[1]=pos; print("asX="asX", pos="pos", neg="neg", xRefl="xRefl", yRefl="yRefl,if(#pos>1,[pos2[1],pos2[2]]=pos[1..2]); …
OK, but what is "pos" supposed to be ?
What dbg_x(pos) gives ?
For what I see, pos is a vector with 5 components, whose first component is a t_LIST
which is corrupted.
So it is unclear if the bug is in writebin or read.
Cheers,
Bill