#715: Parents probably not reclaimed due to too much caching
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       Reporter:  robertwb                                                 |    
     Owner:  somebody                                 
           Type:  defect                                                   |    
    Status:  needs_review                             
       Priority:  major                                                    |    
 Milestone:  sage-5.4                                 
      Component:  coercion                                                 |    
Resolution:                                           
       Keywords:  weak cache coercion Cernay2012                           |   
Work issues:                                           
Report Upstream:  N/A                                                      |    
 Reviewers:  Jean-Pierre Flori, Simon King, Nils Bruin
        Authors:  Simon King, Jean-Pierre Flori                            |    
 Merged in:                                           
   Dependencies:  #9138, #11900, #11599, #13145, to be merged with #11521  |    
  Stopgaps:                                           
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Comment (by SimonKing):

 Replying to [comment:320 nbruin]:
 > Perhaps if we equip every test with a line
 > {{{
 >     >>> sys.stderr.write('testing test 6\n')
 > }}}
 > we may might be able to see the actual order in which the examples are
 tested without preventing the doctest from happening.

 <Deep sigh>

 I tried, and printing to sys.stderr makes the segfault disappear. However,
 it shows that the doctests ''are'' executed in alphabetical order: ...,
 example_49, example_5, example_50, example_51, ..., example_67, example_7,
 example_8, example_9.

 Assuming that the same order is used when ''not'' printing to stderr, we
 still find that the absence of a later doc test will prevent the segfault.
 Namely, you located the segfault in example_27, but it won't occur when
 deleting example_62, which comes alphabetically after example_27.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/715#comment:321>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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