#12313: Fix yet another memory leak caused by caching of coercion data
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       Reporter:  SimonKing                       |         Owner:              
                             
           Type:  defect                          |        Status:  
needs_review                             
       Priority:  major                           |     Milestone:  sage-5.3    
                             
      Component:  memleak                         |    Resolution:              
                             
       Keywords:  coercion weak dictionary        |   Work issues:              
                             
Report Upstream:  N/A                             |     Reviewers:  Simon King, 
Jean-Pierre Flori, John Perry
        Authors:  Simon King, Jean-Pierre Flori   |     Merged in:              
                             
   Dependencies:  #11521, #11599, #12969, #12215  |      Stopgaps:              
                             
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Comment (by SimonKing):

 I had to update the patch again. It is now almost fine.

 Only remaining problem (on my machine, that is):
 {{{
 sage -t  -force_lib
 devel/sage/sage/combinat/integer_vectors_mod_permgroup.py
 }}}
 results in about 20 open processes that never finish. Timeout.

 Running the test --verbose, one finds that all tests pass. But then, it is
 {{{
 271 tests in 40 items.
 271 passed and 0 failed.
 Test passed.
 A workspace appears to have been corrupted... automatically rebuilding
 (this is harmless).
 }}}
 Harmless - but timeout.

 Since the problem appears ''after'' running the tests, it seems to come
 from the doctest framework. Any idea what happens?

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12313#comment:193>
Sage <http://www.sagemath.org>
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