https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43561
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to fail| | --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- GCC might be correct here. This is what clang gives <source>:3:30: error: recursive evaluation of default argument static bool set(T x, bool b = true) { return b; } ^ <source>:7:22: note: in instantiation of template class 'O::B<int>' requested here struct D: public B<int> {}; ^ <source>:4:42: note: default argument used here static const bool sized = sizeof(set(T())) == 0; // line 5 ^ <source>:13:7: error: no member named 'set' in 'O::D' d.set(1); ~ ^