https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120720
--- Comment #6 from Simon H. <sh1.gccbug at tikouka dot nz> --- Oops, right you are. My check was nonsense. That makes far more sense. But for the builtins it's trying to compile line 40, using the function as an initialiser for a constexpr variable, which causes problems; requiring the test on line 24 (of the code at the link at the head of this bug). There must be dozens of builtins in this situation?
