#4527: Exception in
'sage.matrix.matrix_integer_dense.Matrix_integer_dense._hnf_modn_impl'
---------------------------+------------------------------------------------
Reporter: syazdani | Owner: craigcitro
Type: defect | Status: new
Priority: major | Milestone: sage-3.2.1
Component: modular forms | Resolution:
Keywords: segfault |
---------------------------+------------------------------------------------
Changes (by mabshoff):
* keywords: => segfault
* owner: tbd => craigcitro
* component: algebra => modular forms
* milestone: => sage-3.2.1
Comment:
I can reproduce this with the latest and greatest Sage. Gdb says:
{{{
----------------------------------------------------------------------
| Sage Version 3.2.rc0, Release Date: 2008-11-10 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
/scratch/mabshoff/release-cycle/sage-3.2.rc1/local/bin/sage-ipython
GNU gdb 6.4.90-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for
details.
This GDB was configured as "x86_64-linux-gnu"...Using host libthread_db
library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 47755945320288 (LWP 13573)]
Python 2.5.2 (r252:60911, Nov 10 2008, 22:40:35)
[GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
sage: cond=206
sage: J=J0(206)
sage: D=J.new_subvariety().decomposition()
sage: Jp=J.old_subvariety(2)
sage: Jpc=Jp.cuspidal_subgroup()
sage: Ac=D[3].cuspidal_subgroup()
sage: Ac.intersection(Jpc)
Exception in
'sage.matrix.matrix_integer_dense.Matrix_integer_dense._hnf_modn_impl'
ignored
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47755945320288 (LWP 13573)]
0x00002b6f1c26f88d in
__pyx_f_4sage_6matrix_20matrix_integer_dense_20Matrix_integer_dense__hnf_modn
(
__pyx_v_self=0x2b6f2485a560, __pyx_v_res=0x2b6f2485a830,
__pyx_v_det=<value optimized out>)
at sage/matrix/matrix_integer_dense.c:26964
26964
mpz_init_set_si(((__pyx_v_res->_matrix[__pyx_v_i])[__pyx_v_j]),
(__pyx_v_res_l[__pyx_v_k]));
(gdb) bt
#0 0x00002b6f1c26f88d in
__pyx_f_4sage_6matrix_20matrix_integer_dense_20Matrix_integer_dense__hnf_modn
(
__pyx_v_self=0x2b6f2485a560, __pyx_v_res=0x2b6f2485a830,
__pyx_v_det=<value optimized out>)
at sage/matrix/matrix_integer_dense.c:26964
#1 0x00002b6f1c2ac2e7 in
__pyx_pf_4sage_6matrix_20matrix_integer_dense_20Matrix_integer_dense__hnf_mod
(
__pyx_v_self=0x2b6f2485a560, __pyx_v_D=0x7451450) at
sage/matrix/matrix_integer_dense.c:26853
#2 0x0000000000484afc in PyEval_EvalFrameEx (f=0xd7283d0,
throwflag=<value optimized out>) at Python/ceval.c:3561
#3 0x0000000000486182 in PyEval_EvalCodeEx (co=0x2b6f0cf973f0,
globals=<value optimized out>,
locals=<value optimized out>, args=0x2b6f11211d80, argcount=1,
kws=0xd770a78, kwcount=1, defs=0x0, defcount=0,
closure=0x0) at Python/ceval.c:2836
#4 0x0000000000484347 in PyEval_EvalFrameEx (f=0xd770810,
throwflag=<value optimized out>) at Python/ceval.c:3669
#5 0x0000000000486182 in PyEval_EvalCodeEx (co=0x2b6f0c8afe40,
globals=<value optimized out>,
locals=<value optimized out>, args=0x2b6f11211d80, argcount=1,
kws=0xd6fd708, kwcount=2, defs=0x0, defcount=0,
closure=0x0) at Python/ceval.c:2836
<SNIP>
}}}
I am running the computation under valgrind now if it catches anything.
Cheers,
Michael
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4527#comment:1>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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