src/test/ui/reachable/expr_cast.rs

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