https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110195
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- In the context of the C++ standard a "defect report" has a very specific meaning, and it doesn't apply here. The proposal https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1008r1.pdf changed this property, and doesn't describe the old semantics as defective, just unfortunate.
