#12028: Matchpoly.pyx test sometimes hangs
----------------------------+-----------------------------------------------
   Reporter:  jdemeyer      |          Owner:  jason, ncohen, rlm
       Type:  defect        |         Status:  new               
   Priority:  critical      |      Milestone:  sage-4.8          
  Component:  graph theory  |       Keywords:                    
Work_issues:                |       Upstream:  N/A               
   Reviewer:                |         Author:                    
     Merged:                |   Dependencies:                    
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Comment(by jdemeyer):

 The problem is line 1093 in `sage/matrix/matrix_integer_dense.py``:
 {{{
 sig_on()
 v = linbox.charpoly()
 sig_off()
 }}}
 It is inside `linbox.charpoly()` that the test gets stuck.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12028#comment:1>
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