https://svn.boost.org/trac10/ticket/5065 <p> I am using the latest Boost library (version 1.45.0) on Ubuntu. I have built Boost from the source using the bjam. </p> <p> boost::mpi::all_reduce uses boost::mpi::broadcast which seems to generate annoying invalid write errors under valgrind. The problem points to the line 47 in boost/mpi/detail/packed_oprimitive.hpp in const std::size_t &amp;size() const function. I changed the function to: </p> <blockquote> <p> const std::size_t&amp; size() const { </p> <blockquote> <p> const_cast&lt;std::size_t &amp;&gt;(size_) = buffer_.size(); return size_; </p> </blockquote> <p> } </p> </blockquote> <p> and the valgrind complaint seems to be gone. Const_cast seems less than ideal, but it fixes the problem. </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/5065 Trac 1.4.3 dongryel@… Thu, 13 Jan 2011 03:05:52 GMT