http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36587
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Johannes Schaub from comment #7) > Jonathan, unfortunately that code won't create and discard a temporary > object, Yes, you're right, there's no temporary so it's not relevant to this PR. (Although your "whatever that means" assumes my example used std::lock_guard, but if that was the case I'd have needed to use some template arguments. Other scoped-lock types are DefaultConstructible, e.g. std::unique_lock<T>)
