File: empty-never-array.rs

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rustc 1.87.0%2Bdfsg1-1
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#![feature(never_type)]

enum Helper<T, U> {
    T(T, [!; 0]),
    #[allow(dead_code)]
    U(U),
}

fn transmute<T, U>(t: T) -> U {
    let Helper::U(u) = Helper::T(t, []);
    //~^ ERROR refutable pattern in local binding
    //~| `Helper::T(_, _)` not covered
    u
}

fn main() {
    println!("{:?}", transmute::<&str, (*const u8, u64)>("type safety"));
}