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#![allow(unnecessary_transmutes)]
fn main() {
assert!(std::char::from_u32(-1_i32 as u32).is_none());
let _val = match unsafe { std::mem::transmute::<i32, char>(-1) } {
//~^ ERROR: encountered 0xffffffff, but expected a valid unicode scalar value
'a' => true,
'b' => false,
_ => true,
};
}
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