#13107: python long division causing infinite loop
------------------------------------------------+---------------------------
Reporter: titusn | Owner: burcin
Type: defect | Status: needs_review
Priority: critical | Milestone: sage-5.4
Component: symbolics | Resolution:
Keywords: pynac division | Work issues:
Report Upstream: N/A | Reviewers: Burcin
Erocal, Jean-Pierre Flori
Authors: Titus Nicolae, Burcin Erocal | Merged in:
Dependencies: #13316 | Stopgaps:
------------------------------------------------+---------------------------
Changes (by jpflori):
* status: needs_work => needs_review
Old description:
> {{{
>
> sage: ~SR(2L)
>
> local/bin/sage-sage: line 303: 9165 Segmentation fault sage-ipython
> "$@" -i
>
> }}}
> {{{~SR(2L)}}}is evaluated to {{{ SR(2L)^(-1) }}}[[BR]]
> because of a faulty simplification in the power::eval function it
> generates power objects recursively.
>
> A Pynac update fixing that is available in #13316.
> Here are the corresponding doctests.
>
> Apply:
> * [attachment:power+review.2.patch]
New description:
{{{
sage: ~SR(2L)
local/bin/sage-sage: line 303: 9165 Segmentation fault sage-ipython
"$@" -i
}}}
{{{~SR(2L)}}}is evaluated to {{{ SR(2L)^(-1) }}}[[BR]]
because of a faulty simplification in the power::eval function it
generates power objects recursively.
A Pynac update fixing that is available in #13316.
Here are the corresponding doctests.
Apply:
* [attachment:trac_13107.patch]
--
Comment:
Updated patch on top of 5.4. beta0.
The failing hunks were formatting issues <hich have been corrected in
another ticket in the meantime of getting this merged.
5.4.beta1 should be ok with the updated patch.
If someone confirms that, let's merge this.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13107#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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