http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56257
--- Comment #3 from Wolfgang Bangerth <bangerth at gmail dot com> 2013-02-09 21:37:55 UTC --- :-) Sure, and of course I did tell him "don't do that". In essence it's a question of how easy it is to shoot yourself in the foot by exposing internal details of the implementation.