#7922: Pickling fails in WeightRing
-----------------------------+----------------------------------------------
   Reporter:  nthiery        |       Owner:  bump        
       Type:  defect         |      Status:  needs_review
   Priority:  major          |   Milestone:  sage-4.7    
  Component:  combinatorics  |    Keywords:              
     Author:                 |    Upstream:  N/A         
   Reviewer:  nthiery        |      Merged:              
Work_issues:                 |  
-----------------------------+----------------------------------------------
Changes (by bump):

  * work_issues:  pickle jar will have to be rebuilt =>


Old description:

> First issue caught by #7921:
>
> {{{
> sage: A2 = WeylCharacterRing(['A',2])
> sage: a2 = WeightRing(A2)
> sage: TestSuite(a2).run()
> Failure in _test_element_pickling:
> Traceback (most recent call last):
> ...
> AssertionError: 2*a2(0,0,0) != 2*a2(0,0,0)
> }}}
>
> Indeed:
> {{{
> sage: x = a2.an_element()
> sage: x == loads(dumps(x))
> False
> }}}
>
> I assume that this is an issue in equality test. This should be fixed for
> free when WeightRing's will use CombinatorialFreeModules
> and categories.
>
> Apply only
>
> {{{
>  trac_7922-rebased-4.7.alpha1.patch
> }}}

New description:

 First issue caught by #7921:

 {{{
 sage: A2 = WeylCharacterRing(['A',2])
 sage: a2 = WeightRing(A2)
 sage: TestSuite(a2).run()
 Failure in _test_element_pickling:
 Traceback (most recent call last):
 ...
 AssertionError: 2*a2(0,0,0) != 2*a2(0,0,0)
 }}}

 Indeed:
 {{{
 sage: x = a2.an_element()
 sage: x == loads(dumps(x))
 False
 }}}

 I assume that this is an issue in equality test. This should be fixed for
 free when WeightRing's will use CombinatorialFreeModules
 and categories.

 '''Apply''' [attachment: trac_7922-rebased-4.7.alpha1.patch]

 '''Copy''' [attachment: pickle_jar.tar.bz2] into
 {{{data/ext_code/pickle_jar}}}.

--

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7922#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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