https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98463
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Unfortunately that patch regresses +FAIL: g++.dg/cpp0x/constexpr-empty9.C -std=c++11 (test for excess errors) +FAIL: g++.dg/cpp0x/constexpr-empty9.C -std=c++14 (test for excess errors) +FAIL: g++.dg/cpp0x/constexpr-tuple2.C -std=c++11 (test for excess errors) +FAIL: g++.dg/cpp0x/constexpr-tuple2.C -std=c++14 (test for excess errors) +FAIL: g++.dg/cpp1y/constexpr-empty2.C -std=c++14 (test for excess errors) +FAIL: g++.dg/cpp1y/constexpr-tracking-const24.C -std=c++14 (test for excess errors) +FAIL: 20_util/tuple/comparison_operators/overloaded.cc (test for excess errors) Out of ideas what to do with this.