My fault, I reported it but didn't open a ticket. I'll wait for Carl
to do so to avoid duplication. I have another of my own to open
(complete with patch).
John
On 17/02/2008, mabshoff
<[EMAIL PROTECTED]> wrote:
>
>
>
> On Feb 11, 12:14 am, Carl Witty <[EMAIL PROTECTED]> wrote:
> > On Feb 10, 6:58 am, "John Cremona" <[EMAIL PROTECTED]> wrote:
> >
> >
> >
> > > First the bad news:
> > > ----------------------------------------------------------------------
> > > | SAGE Version 2.10.1, Release Date: 2008-02-02 |
> > > | Type notebook() for the GUI, and license() for information. |
> > > ----------------------------------------------------------------------
> >
> > > sage: E=EllipticCurve(GF(5),[1,1])
> > > sage: E1=E.base_extend(GF(125,'a'))
> > > sage: E2=E1.base_extend(GF(125^2,'b'))
> >
> > > ------------------------------------------------------------
> > > Unhandled SIGSEGV: A segmentation fault occured in SAGE.
> > > This probably occured because a *compiled* component
> > > of SAGE has a bug in it (typically accessing invalid memory)
> > > or is not properly wrapped with _sig_on, _sig_off.
> > > You might want to run SAGE under gdb with 'sage -gdb' to debug this.
> > > SAGE will now terminate (sorry).
> > > ------------------------------------------------------------
> >
> > Here's part of the backtrace I see on my laptop for this crash:
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > [Switching to Thread 0xb7dfb8c0 (LWP 15819)]
> > 0xb5443782 in
> > __pyx_f_4sage_5rings_19finite_field_givaro_25FiniteField_givaroElement__add_c_impl
> > (__pyx_v_self=0x9e10d74, __pyx_v_right=0x9e10f7c)
> > at /home/cwitty/sage/local//include/givaro/givgfq.inl:292
> > 292 { _GIVARO_GFQ_ADD(r, a, b, GFqDom<TT>::_qm1,
> > GFqDom<TT>::_plus1) ; return r; }
> > (gdb) bt
> > #0 0xb5443782 in
> > __pyx_f_4sage_5rings_19finite_field_givaro_25FiniteField_givaroElement__add_c_impl
> > (__pyx_v_self=0x9e10d74, __pyx_v_right=0x9e10f7c)
> > at /home/cwitty/sage/local//include/givaro/givgfq.inl:292
> > #1 0xb71eac7f in
> > __pyx_pf_4sage_9structure_7element_13ModuleElement___add__ (
> > __pyx_v_left=0x9e10d74, __pyx_v_right=0x9e10f7c)
> > at sage/structure/element.c:15976
> > #2 0x0805ce33 in binary_op1 (v=0x9e10d74, w=0xbfb53d64, op_slot=0)
> > at Objects/abstract.c:398
> > #3 0x0805d310 in PyNumber_Add (v=0x9e10d74, w=0x9e10f7c)
> > at Objects/abstract.c:638
> >
> > Carl
>
> Hi,
>
> I tried to find the problem in trac, but it doesn't seem to be there.
> Carl: Could you open a ticket in case it isn't there yet?
>
> Cheers,
>
> Michael
> >
>
--
John Cremona
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