http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49813
--- Comment #31 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-07-25 10:54:24 UTC --- Richard, as far as I can see, if we don't fold, we don't fold, that line of user code with, eg constexpr data, will simply not compile. I don't think this is a major issue...