#6113: segfault in division_points and factoring torsion_polynomial
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Reporter: ncalexan | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.1
Component: number theory | Keywords: segfault division points torsion
polynomial
Reviewer: | Author:
Merged: |
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Comment(by stankewicz):
Replying to [comment:3 cremona]:
> If we can come up with an example which fails in gp then it would be
easy to send a bug report to the pari developers. It is harder if we can
only get the error using the pari library, since then they might want a C
program in the report. I think (quite reasonably) that the pari
developers cannot be expected to debug things which can only be
demonstrated in a Sage run -- even if the use of pari in Sage has
increased the number of pari users worldwide by a lot!
Well, I ran it on gp and it worked just fine. The results are included in
the text file I've attached along with the same example failing in sage.
When I -gdb it I get pointed to /usr/local/sage/local/LIB/libpari-gmp.so.2
That in addition to the fact that the code for factoring a univariate
polynomial over a number field appears to essentially consist of "make
PARI do it" is why it appeared that PARI was causing the SegFault.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6113#comment:4>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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