Looks like a bug to me. stack_construct doesn't pass the version number. This would only show up in loading of collections and other places where one uses stack_sonstruct. It seems quite fixable to me. I'll look into it. Robert Ramey Ben Artin wrote:

As far as I can tell, the version number passed into load_construct_data is not actually useful. This conclusion is based (among other things) on the fact that stack_construct (in serialization/detail/stack_constructor.hpp) always calls load_construct_data_adl with 0U for the version argument.

This leads me to believe that in the current implementation if I specialize load_construct_data for one of my classes, I can never change it later, as the class version number from the input archive is inaccessible inside load_construct_data.

Am I missing something obvious, or is it really the case that versioning doesn't work for load_construct_data right now?

Thanks,

Ben