#10058: Segfault in backward and inverse FFT for 2**n elements
-------------------------+--------------------------------------------------
Reporter: mpatel | Owner: jason, jkantor
Type: defect | Status: new
Priority: major | Milestone: sage-4.6.1
Component: numerical | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
-------------------------+--------------------------------------------------
Description changed by mpatel:
Old description:
> Sage crashes when asked to do a backward or inverse FFT for sizes that
> are powers of two:
> {{{
> sage: a = FFT(5)
> sage: a[1] = 2
> sage: a.forward_transform()
> sage: a.backward_transform()
> sage: a = FFT(4)
> sage: a[1] = 2
> sage: a.forward_transform()
> sage: a.backward_transform()
>
> ------------------------------------------------------------
> Unhandled SIGSEGV: A segmentation fault occurred in Sage.
> This probably occurred 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).
> ------------------------------------------------------------
> }}}
>
> Joal Heagney reported this problem on [http://groups.google.com/group
> /sage-devel/browse_thread/thread/7830e0c484a0f38d sage-devel].
New description:
Sage crashes when asked to do a backward or inverse FFT for sizes that are
powers of two:
{{{
sage: a = FFT(5)
sage: a[1] = 2
sage: a.forward_transform()
sage: a.backward_transform()
sage: a = FFT(4)
sage: a[1] = 2
sage: a.forward_transform()
sage: a.backward_transform()
------------------------------------------------------------
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
This probably occurred 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).
------------------------------------------------------------
}}}
This is with 4.6.alpha2.
Joal Heagney reported this problem on [http://groups.google.com/group
/sage-devel/browse_thread/thread/7830e0c484a0f38d sage-devel].
--
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10058#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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