#18905: fix more leaks found in #18897
---------------------------+------------------------
       Reporter:  dimpase  |        Owner:
           Type:  defect   |       Status:  new
       Priority:  major    |    Milestone:  sage-6.8
      Component:  memleak  |   Resolution:
       Keywords:           |    Merged in:
        Authors:           |    Reviewers:
Report Upstream:  N/A      |  Work issues:
         Branch:           |       Commit:
   Dependencies:  #18897   |     Stopgaps:
---------------------------+------------------------

Comment (by SimonKing):

 Replying to [comment:5 slabbe]:
 > Like noticed in #18897, when this code is runned the first time, there
 are many stuff left. But the second time, the list is empty.

 That's just because there is only one base ring. Do the same while
 iterating over `GF(p)`, and you'll see how things accumulate.

 At #18897, a binary tree was duely deallocated, however it was forgotten
 to dereference the root node. But here, we have objects that could be
 deallocated, but aren't. It is a totally different kind of leak.

--
Ticket URL: <http://trac.sagemath.org/ticket/18905#comment:8>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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