https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69960
--- Comment #22 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- I do however expect there may be cases in GCC 13 where constexpr initializers of floating type are accepted that do not meet the definition of arithmetic constant expressions, since GCC is generally a lot more careful about ensuring things are integer constant expressions when required than it is about doing the same for arithmetic constant expressions (before C2x there weren't any cases that allowed arithmetic constant expressions without also allowing other kinds of constant expressions permitted in initializers).
