http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60631
--- Comment #2 from Paul Preney <paul at preney dot ca> --- It seems to the similar/equivalent. That said, clearly this is not a constexpr issue (which bug 59296 does not demonstrate). A concern of mine is that this appears to effectively, especially given the immportance of using const in C++, render GCC's C++11 rvalue *this implementation practically unusable in many classes until this is fixed.