http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49122
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-05-23 16:44:22 UTC --- There's a note in [support.initlist] which says: "Copying an initializer list does not copy the underlying elements." However there was some discussion on the core reflector last month pointing out that other requirements are inconsistent with that.