https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69841
James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jason at gcc dot gnu.org --- Comment #4 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> --- Goes away on trunk after r223301 Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4> Date: Mon May 18 17:14:11 2015 +0000 DR 1391 * pt.c (type_unification_real): Check convertibility here. (unify_one_argument): Not here. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223301 After which the DECL_ALIGN in both TUs is 64, fixing the bug.