#11911: Fix missing uniqueness of parents when unpickling libsingular polynomial
rings
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   Reporter:  SimonKing  |          Owner:  was                                
       Type:  defect     |         Status:  needs_review                       
   Priority:  major      |      Milestone:  sage-4.7.2                         
  Component:  pickling   |       Keywords:  unpickle libsingular unique parents
Work_issues:             |       Upstream:  N/A                                
   Reviewer:             |         Author:                                     
     Merged:             |   Dependencies:                                     
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Comment(by SimonKing):

 Remark: I consider it a feature of my patch that old pickles of polynomial
 rings will automatically be transformed into a new format, should Sage
 ever drop libsingular.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11911#comment:2>
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