rust/tests/compile-fail/match_char.rs

// ignore-test FIXME: we are not checking these things on match any more?
//This does currently not get caught becuase it compiles to SwitchInt, which
//has no knowledge about data invariants.

fn main() {
    assert!(std::char::from_u32(-1_i32 as u32).is_none());
    let _ = match unsafe { std::mem::transmute::<i32, char>(-1) } { //~ ERROR constant evaluation error
        //~^ NOTE tried to interpret an invalid 32-bit value as a char: 4294967295
        'a' => {true},
        'b' => {false},
        _ => {true},
    };
}