#14895: Segfault when exponentiating an integer with I.pyobject()
-------------------------------+------------------------
Reporter: eviatarbach | Owner: burcin
Type: defect | Status: new
Priority: critical | Milestone: sage-6.2
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
-------------------------------+------------------------
Old description:
> Try, for example, `2^I.pyobject()`.
>
> This is a critical issue since any method of a class inheriting from
> `BuiltinFunction` will receive the I pyobject if I is passed as an
> argument to the function.
New description:
Try, for example, `2^I.pyobject()`.
This is a critical issue since any method of a class inheriting from
`BuiltinFunction` will receive the I pyobject if I is passed as an
argument to the function.
This in turn leads to segfaults like:
{{{
sage: K.<a> = NumberField(x^2+1)
sage: 2^a
}}}
or
{{{
sage: K.<sqrt2> = QuadraticField(2)
sage: 2^sqrt2
}}}
--
Comment (by rws):
Pingpong between parent and base.
`rings/rational.pyx` (`Rational._pow_()`):
{{{
if PY_TYPE_CHECK(n, Element):
return (<Element>n)._parent(self)**n
try:
return n.parent()(self)**n
}}}
`rings/number_field/number_field_element.pyx`
(`NumberFieldElement._pow_()`):
{{{
from sage.symbolic.ring import SR
try:
res = QQ(base)**exp
except TypeError:
pass
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/14895#comment:3>
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/groups/opt_out.
