------- Comment #8 from pinskia at gcc dot gnu dot org 2010-05-17 19:17 ------- The first example I think does as there is no way to "transfer" the dynamic type via the struct copy. The second one does not as the union still has a field that is float and it is only unspecified behavior if you access the other field in the union (IIRC).
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44164
