Re: [ublas] Serious bug in mapped_vector_of_mapped_vector

From: troyer_at_[hidden]
Date: 2006-09-07 08:39:23

Gunter Winkler <guwi17_at_[hidden]> said:

> On Sunday 23 July 2006 11:13, Matthias Troyer wrote:
> > There is a serious bug in the mapped_vector_of_mapped_vector spare
> > matrix type. Rows containing only zero elements are not treated
> > correctly in prod(). The following code should give a vector that
> > contains only 1 in the last element. Instead prod() gives a vector
> > containing 1 in each element. In debug mode this bug is found by the
> 
> I could reproduce the bug. It is inside the vector_assign logic. The product 
> is correctly computed, but the assignment fails. I will give more details 
> shortly.
>

Thanks