#5667: matrix modified when operation should be rolled back
----------------------------+-----------------------------------------------
Reporter: jason | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-3.4.2
Component: linear algebra | Keywords:
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Check this out:
{{{
sage: b
[ 1 1 0 -1 1 0]
[ 0 2 0 -5 3 1]
[ 0 0 1 2 -1 0]
sage: b[1] = b[1]/2
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/home/grout/.sage/temp/good/14543/_home_grout__sage_init_sage_0.py in
<module>()
/home/grout/sage/local/lib/python2.5/site-packages/sage/matrix/matrix0.so
in sage.matrix.matrix0.Matrix.__setitem__ (sage/matrix/matrix0.c:6325)()
/home/grout/sage/local/lib/python2.5/site-packages/sage/matrix/matrix0.so
in sage.matrix.matrix0.Matrix._coerce_element
(sage/matrix/matrix0.c:6667)()
/home/grout/sage/local/lib/python2.5/site-
packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__
(sage/structure/parent.c:3653)()
/home/grout/sage/local/lib/python2.5/site-packages/sage/rings/rational.so
in sage.rings.rational.Q_to_Z._call_ (sage/rings/rational.c:16008)()
TypeError: no conversion of this rational to integer
sage: b
[ 1 1 0 -1 1 0]
[ 0 1 0 -5 3 1]
[ 0 0 1 2 -1 0]
sage: b.base_ring()
Integer Ring
}}}
The matrix {{{b}}} was modified, but should not have been modified since
the operation had an error.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5667>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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