https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116769
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |accepts-invalid --- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> --- We could add a pedwarn so users are made aware it's an extension. But that might require significant changes to handling of NSDMIs to detect that substitution fails because of the NSDMI (just guessing, I have no idea how we handle them). I've added the 'accepts-invalid' keyword, but since this is deliberate maybe it should be 'diagnostic' instead.