https://gcc.gnu.org/bugzilla/show_bug.cgi?id=13071
--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #11) > I'll open an LWG issue to get clarification. LWG agrees that it's ill-formed (no diagnostic required) to include standard headers inside a linkage-specification. Libstdc++ tries to makes it work as QoI, e.g. r12-4367-gc1b6c360fcf3fc -- You are receiving this mail because: You reported the bug.