https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77964
--- Comment #24 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Jiri Slaby from comment #22) > (In reply to Andrew Pinski from comment #19) > > *** Bug 106939 has been marked as a duplicate of this bug. *** > > Provided that many duplicates (even nested -- see that bug too) -- everyone > expects this to work. Would it be possible for gcc to at least dump a > warning? Also see PR 116910 where I recommended we document the proper way of doing this too.