#![feature(never_type)] #![allow(unused_variables)] #![allow(unused_assignments)] #![allow(dead_code)] #![deny(unreachable_code)] fn foo() { // No error here. let x; x = return; //~ ERROR unreachable } fn bar() { use std::ptr; let p: *mut ! = ptr::null_mut::(); unsafe { // Here we consider the `return` unreachable because // "evaluating" the `*p` has type `!`. This is somewhat // dubious, I suppose. *p = return; //~ ERROR unreachable } } fn baz() { let mut i = 0; *{return; &mut i} = 22; //~ ERROR unreachable } fn main() { }