https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109277
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Component|c++ |libstdc++ --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- The GCC 12 preprocessed source works (with a minor change of s/__remove_cv/__remove_cv1/ ) so this is definitely due to a libstdc++ change.