On Jan 18, 2012, at 1:26 AM, Chris Cleeland wrote:

../../../boost/exception/detail/error_info_impl.hpp:43: warning:
`class boost::error_info<tag_answer, int>' has virtual functions but
non-virtual destructor

This has been discussed extensively, e.g.:

http://boost.2283326.n4.nabble.com/boost-exception-detail-error-info-base-does-not-have-virtual-destructor-td3384903.html

Cheers,
Gordon