#17964: Singular crashes when reducing a polynomial modulo a prime of a number
field
-------------------------------------+-------------------------------------
Reporter: pbruin | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.6
Component: interfaces | Resolution:
Keywords: singular crash | Merged in:
Authors: Peter Bruin | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/pbruin/17964-Singular_currRing_crash|
52d8a59fbfc23d58f65cd942b0361ac2cf4f767f
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Changes (by {'newvalue': u'Peter Bruin', 'oldvalue': ''}):
* status: new => needs_review
* commit: => 52d8a59fbfc23d58f65cd942b0361ac2cf4f767f
* branch: => u/pbruin/17964-Singular_currRing_crash
* author: => Peter Bruin
Old description:
> In Sage 6.6.beta5:
> {{{
> sage: K.<a> = QuadraticField(17)
> sage: Q.<x,y> = K[]
> sage: f = (-3*a)*y + (5*a)
> sage: p = K.primes_above(5)[0]
> sage: R = K.residue_field(p)
> sage: F = R['x','y']
> sage: g = F(f)
> ...
> Unhandled SIGSEGV: A segmentation fault occurred in Sage.
> }}}
New description:
In Sage 6.6.beta5:
{{{
sage: K.<a> = QuadraticField(17)
sage: Q.<x,y> = K[]
sage: f = (-3*a)*y + (5*a)
sage: p = K.primes_above(5)[0]
sage: R = K.residue_field(p)
sage: F = R['x','y']
sage: g = F(f)
...
Unhandled SIGSEGV: A segmentation fault occurred in Sage.
}}}
This is caused by (unnecessarily) changing `currRing` to ''Q'' and not
setting it back to ''F''.
--
--
Ticket URL: <http://trac.sagemath.org/ticket/17964#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
