https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70196
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Nathan Sidwell from comment #4) > ordering comparison of pointers is only well-defined when the two pointers > point into the same object (including one-past-the-end). [expr.ref]/4 > Right, there's a warning from -Wextra for that, there's a bug to split it off into its own warning, too...
