1 #![allow(unused_variables)]
2 #![allow(unused_assignments)]
3 #![allow(dead_code)]
4 #![deny(unreachable_code)]
5 #![feature(never_type, type_ascription)]
6 
a()7 fn a() {
8     // the cast is unreachable:
9     let x = {return} as !; //~ ERROR unreachable
10     //~| ERROR non-primitive cast
11 }
12 
main()13 fn main() { }
14