src/tools/miri/tests/compile-fail/never_transmute_void.rs

// This should fail even without validation
// compile-flags: -Zmiri-disable-validation

#![feature(never_type)]
#![allow(unused, invalid_value)]

mod m {
    enum VoidI {}
    pub struct Void(VoidI);

    pub fn f(v: Void) -> ! {
        match v.0 {} //~ ERROR entering unreachable code
    }
}

fn main() {
    let v = unsafe {
        std::mem::transmute::<(), m::Void>(())
    };
    m::f(v); //~ inside `main`
}