[Boost-bugs] [Boost C++ Libraries] #1237: Resizing symmetric matrices

Subject: [Boost-bugs] [Boost C++ Libraries] #1237: Resizing symmetric matrices
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2007-09-10 06:57:49

#1237: Resizing symmetric matrices
-------------------------------------------+--------------------------------
 Reporter:  tinne.delaet_at_[hidden]  |        Type:  Bugs            
   Status:  new                            |   Milestone:  To Be Determined
Component:  uBLAS                          |     Version:  Boost 1.34.1    
 Severity:  Problem                        |    Keywords:                  
-------------------------------------------+--------------------------------
 Hi,

 While using the most recent version of Boost (boost_1_34_1) I noticed some
 problems when resizing a symmetric matrix. I included a test program to
 illustrate the problems. (Recent SVN snapshots and boost 1.33 have the
 same problem)

 When executing I get the following error caused by resizing the symmetric
 matrix with the preserve option set to true:

 Resize ml to bigger size[[BR]]
 Check failed in[[BR]]
 file /home/fiep/sources/boost_1_34_1/boost/numeric/ublas/storage.hpp at
 line 196: [[BR]]
 i < size_ [[BR]]
 terminate called after throwing an instance of
 'boost::numeric::ublas::bad_index' [[BR]]
 Â  what(): Â bad index [[BR]]
 Aborted (core dumped)

 Note that are no problems when resizing normal matrices nor resizing
 symmetric
 matrices when the preserve option is set to false.

 When stepping into the program, it seems that something goes wrong with
 the
 indexing of the symmetric matrix. Â I expect that these problems are caused
 by
 the use of the matrix_resize_preserver  routine which is called in case
 the
 preserve option is set to true. I think  this routine is designed for
 normal
 matrices only and expects a matrix which  is completely filled as opposed
 to
 a symmetric matrix in which only one  triangle is filled.

 Might this be a BUG?

 Kind regards,

 Tinne De Laet

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1237>
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