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Bill Allombert on Sat, 13 Jul 2024 15:43:34 +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: Sat, 13 Jul 2024 15:43:26 +0200
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- References: <ZpCPqJ_xFJ5ePkmk@debian.attlocal.net> <ZpFJNpAHUjAeaFji@debian.attlocal.net> <ZpFm-qo8hu6xBmcq@seventeen> <ZpIPu3Joks39EzAs@debian.attlocal.net>
On Fri, Jul 12, 2024 at 10:25:15PM -0700, Ilya Zakharevich wrote:
> On Fri, Jul 12, 2024 at 07:25:14PM +0200, Bill Allombert wrote:
> > OK, but what is "pos" supposed to be ?
> >
> > What dbg_x(pos) gives ?
>
> Oups, I remembered that there was something like dbg_x(), but after
> inspecting a couple of dbg_*() functions gave up — too early! I
> append the results.
>
> > 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.
>
> Now I it seems that I fixed most of MY bugs — only PARI’s shortcomings
> and limitations seem to be hit now (but this took about 250 millions
> tries of fuzzing!). So I just attach the code (with one “workaround”
> commented out — to trigger the bug I was tracing through; it is
> irrelevant though to the segfault in question).
>
> Load the code, then do
> neg1=neg2=POS1=POS=pos2=[1..2] \\ buckets for debugging
> fuzz_convhull3D_avoids0(19,[5],0x1,3,4)
Thanks, I have reported this bug as #2563.
Cheers,
Bill