https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100919
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to fail| |10.2.0, 11.1.0, 12.0, | |4.9.4, 8.3.0, 9.1.0 Keywords| |diagnostic --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- The problem goes as far back as I can see (4.9 issues just one duplicate warning, starting with 5.0 GCC issues three).