@Eugenius, you should probably take a look at LWG issue #2463 http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#2463 I don't think it will require a code change; but you should make sure that we satisfy it. http://reviews.llvm.org/D9044 EMAIL PREFERENCES http://reviews.llvm.org/settings/panel/emailpreferences/