https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95498
--- Comment #5 from Alex Coplan <acoplan at gcc dot gnu.org> --- Created attachment 48867 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48867&action=edit Minimal reproducer I've done some exhaustive testing of which combinations of casts are allowed. It seems that any program of the following form is rejected with "unhandled conversion": T f(T x) { return (T)(U)x; } where T and U are integral types with U being strictly wider than T. I've attached a minimal handwritten testcase that reproduces the issue. You should be able to substitute the values passed to t_outer and t_inner for other types and still reproduce the issue, provided that t_outer is a strictly narrower type than t_inner.
