Looks like a bug to me. I'll fix it. Note that this won't fix your program but rather just handle the "unregistered class" error better. Robert Ramey Patrick Horgan wrote:

Building my own code against trunk I started getting this error. Anyone know off the top of your head what it is before I dig it out?

archive/detail/oserializer.hpp:398:36: error: ‘const class boost::serialization::extended_type_info’ has no member named ‘get_debug_info’