#11900: Serious regression caused by #9138
-------------------------------------------------+--------------------------
   Reporter:  SimonKing                          |          Owner:  tbd         
                 
       Type:  defect                             |         Status:  
needs_review                 
   Priority:  critical                           |      Milestone:  sage-4.8    
                 
  Component:  performance                        |       Keywords:  categories 
regression        
Work_issues:  Segmentation faults                |       Upstream:  N/A         
                 
   Reviewer:  Jeroen Demeyer, Nicolas M. Thiéry  |         Author:  Simon King, 
Nicolas M. Thiéry
     Merged:                                     |   Dependencies:  #9138 
#11911                 
-------------------------------------------------+--------------------------

Comment(by SimonKing):

 Replying to [comment:172 nthiery]:
 > For information, I ran the test with -verbose on my machine, and the
 segfault can be triggered with
 >     sage: vector([])

 Then it's fixed with alpha3:
 {{{
 king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.8.alpha3$ ./sage
 ----------------------------------------------------------------------
 | Sage Version 4.8.alpha3, Release Date: 2011-12-02                  |
 | Type notebook() for the GUI, and license() for information.        |
 ----------------------------------------------------------------------
 **********************************************************************
 *                                                                    *
 * Warning: this is a prerelease version, and it may be unstable.     *
 *                                                                    *
 **********************************************************************
 sage: vector([])
 ()
 }}}
 with #9138 and the two patches from here applied.

 I guess one should try to find out what ticket has changed the relevant
 bits in the vector creation, and list it as dependency.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:173>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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