https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71985
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- What I suggested was that there is no backwards compatibility issue for C++03 code if the initialization creates a std::initializer_list. I was very specifically talking about std::initializer_list not initializer lists in general. I also pointed out that there is no "clear requirement" for an error because the standard only requires a diagnostic and a warning is a diagnostic.
