id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
1237	Resizing symmetric matrices	tinne.delaet@…	Gunter	"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]]
  what():  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.  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"	Bugs	closed	Boost 1.35.0	uBLAS	Boost 1.34.1	Problem	fixed