[Scipy-tickets] [SciPy] #553: sparse solvers segfault with singular matrices

SciPy Trac scipy-tickets@scipy....
Tue Apr 27 17:14:00 CDT 2010


#553: sparse solvers segfault with singular matrices
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  Reporter:  insyzygy             |       Owner:  wnbell                   
      Type:  defect               |      Status:  closed                   
  Priority:  normal               |   Milestone:  0.8.0                    
 Component:  scipy.sparse.linalg  |     Version:                           
Resolution:  fixed                |    Keywords:  SuperLU segfault singular
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Changes (by pv):

  * status:  new => closed
  * resolution:  => fixed


Comment:

 Yep, SuperLU has some bugs when pivoting singular matrices.

 Some sort of fix applied in r6354 and r6355. I'm not sure if the resulting
 L and U factors make sense after this fix, but that probably doesn't
 matter since Scipy does not expose them anyway and only reports an error.

-- 
Ticket URL: <http://projects.scipy.org/scipy/ticket/553#comment:6>
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