https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89038
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |diagnostic Status|UNCONFIRMED |NEW Last reconfirmed| |2019-01-24 CC| |msebor at gcc dot gnu.org Component|preprocessor |c++ Ever confirmed|0 |1 Known to fail| |4.3.5, 4.4.7, 4.8.5, 4.9.4, | |5.4.0, 6.4.0, 7.3.0, 8.2.0, | |9.0 --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- Confirmed. It works correctly in C but has never worked in C++ so it's not a regression.