#12173: Update FLINT to 2.3
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Reporter: mhansen |
Owner: tbd
Type: enhancement |
Status: needs_work
Priority: major |
Milestone: sage-5.8
Component: packages |
Resolution:
Keywords: flint spkg | Work
issues: OS X
Report Upstream: N/A |
Reviewers: John Cremona
Authors: Mike Hansen, Fredrik Johansson, Jean-Pierre Flori |
Merged in:
Dependencies: #12433 |
Stopgaps:
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Comment (by jpflori):
Replying to [comment:192 fredrik.johansson]:
> If I'm reading this right, it prints the fmpz_poly four times before
even entering fmpq_poly, and it's wrong the third time, that is, when
calling (<Polynomial_integer_dense_flint>x).jprint()?
>
> But the fmpz coefficients are the same, so it is (seemingly) the entries
in flint's global mpz array that are being zeroed when they shouldn't.
So that must be it.
>
> It smells a lot like one of the bugs we've had in the past with the non-
reentrant mode, i.e., somewhere, some code loads an mpz pointer, and hangs
on to it while the mpz array gets resized. It could potentially be
triggered by a compiler bug which, say, makes it overlook constness
somewhere.
>
> You might be able to track down exactly where the mpz gets zeroed (say,
by saving the pointer somewhere, and printing it in various places). Or,
since the fmpz just encodes an index into the mpz array, you could perhaps
edit the COEFF_TO_PTR macro to print the index, and find out the places
where the particular indices of the mpzs in the coefficients of this
polynomial are being accessed. It might also help to print where mpz array
is being resized.
I'll try this now.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12173#comment:198>
Sage <http://www.sagemath.org>
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