#9357: Unhandled SIGFPE: in number_field_element_quadratic
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Reporter: lftabera | Owner: AlexGhitza
Type: defect | Status: new
Priority: major | Milestone: sage-4.5
Component: algebra | Keywords: SIGFPE,
ZeroDivisionError
Author: Luis Felipe Tabera Alonso | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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{{{
sage: d=QQ[i](0)
sage: ~d
------------------------------------------------------------
Unhandled SIGFPE: An unhandled floating point exception 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).
------------------------------------------------------------
}}}
The code dos not check if the element to be inverted is zero or not and
does not handle the exception that ocurred in the c extension.
There is a trivial patch that checks if the input is zero or not. I am not
sure if the sourronding code should have some _sig_on _sig_off to made it
more robust. _sig_on _sig_off would avoid the sage crash but would raise a
RunTime exception.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9357>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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