https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109277
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Reduced testcase that shows the compiling difference between GCC 12 and 13: ``` #include <type_traits> struct a; struct b{}; bool c = std::is_convertible<a,b>::value; ```