------- Comment #1 from redi at gcc dot gnu dot org 2010-05-16 17:07 ------- The rules say that for copy-initialization where the source type (X&&) is not the same as the destination type (X) a temporary is created. That temporary is copy-constructed from x, then y is move-constructed from the temporary.
To avoid the temporary use direct-initialization; Y y( static_cast<X&&>(x) ); -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44158
