https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92059
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to John Harris from comment #2) > I figured this out. The assignment operator doesn't have a return statement. > Why that matters, I don't know. But adding return *this fixes it. Because if you fallthrough to the end without a return, it is undefined. Newer GCC's changed the behavior there.
