https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |rsandifo at gcc dot gnu.org --- Comment #18 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- (In reply to Eric Gallager from comment #16) > (In reply to John Steele Scott from comment #14) > > FWIW Clang has this warning via -Wnon-pod-varargs. > > Confirmed, gcc having this warning would help avoid: > http://gcc.gnu.org/ml/gcc-patches/2017-09/msg00126.html Yeah. The situation is similar to the code in comment #4, which as Jakub says in comment #10 no longer produces a warning with g++ -Wconditionally-supported. I had to add a dummy destructor to get one.