#12924: SchubertPolynomialRing causes symmetrica and Sage to crash on bad input
-----------------------------+----------------------------------------------
Reporter: VivianePons | Owner: VivianePons
Type: defect | Status: new
Priority: major | Milestone: sage-5.1
Component: combinatorics | Keywords: days38, Schubert polynomials
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
-----------------------------+----------------------------------------------
The SchubertPolynomialRing expects a permutation as an index. When a list
is given which is not a permutation, the object is created anyway. The
problem comes when one tries to expand the polynomial, if the index is not
a valid permutation, it makes symmetrica crash which makes Sage crash !
{{{
sage: S = SchubertPolynomialRing(ZZ)
sage: pol = S([2,1,3])
sage: pol.expand()
x0
sage: pol = S([2,1,1])
sage: pol.expand()
function: mult_apply_integer(2)
python: function: mult_apply_integer(2)
: Operation not permitted
}}}
So the idea would be to check when the polynomial is created that the
input is correct and raise an exception at this point if it's not. [[BR]]
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12924>
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 post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
