#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):

 And this one
 {{{
 sage: import objgraph, gc
 sage: cm = sage.structure.element.get_coercion_model()
 sage: K = GF(31)
 sage: A = K.algebraic_closure()
 sage: nK = id(K)
 sage: del A,K
 sage: gc.collect()
 0
 sage: L = [c for c in gc.get_objects() if id(c) == nK]
 sage: objgraph.find_backref_chain(L[0], lambda x: x is cm,
 extra_ignore=(id(L),))
 }}}
 doesn't finish after several minutes.

--
Ticket URL: <http://trac.sagemath.org/ticket/18905#comment:22>
Sage <http://www.sagemath.org>
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