#13970: Fix memory allocation in distances all pairs
---------------------------------+------------------------------------------
       Reporter:  dcoudert       |         Owner:  jason, ncohen, rlm
           Type:  enhancement    |        Status:  needs_review      
       Priority:  major          |     Milestone:  sage-5.7          
      Component:  graph theory   |    Resolution:                    
       Keywords:                 |   Work issues:                    
Report Upstream:  N/A            |     Reviewers:  Nathann Cohen     
        Authors:  David Coudert  |     Merged in:                    
   Dependencies:                 |      Stopgaps:                    
---------------------------------+------------------------------------------

Comment (by ncohen):

 > With 65534 nodes, the {{{init_short_digraph}}} method takes a few
 seconds. With 65535 nodes, I had to kill the process (after > 1 hour). I
 don't know yet whats going on. I have to investigate further with some
 print statements...

 AHahaha. Yeah. I know why : infinite loop `:-P`
 Because of something like that :
 {{{
 cdef unsigned short i
 for 0<= i <2^16:
     pass
 }}}

 And of course the loop never ends, for adding 1 to 2^16-1 makes it equal
 to 0.

 Should raise an exception, though `:-P`

 Nathan

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13970#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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