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fn main() {
let mut a = [1, 2, 3, 4];
let t = match a {
[1, 2, ref tail @ ..] => tail,
_ => unreachable!()
};
println!("t[0]: {}", t[0]);
a[2] = 0; //~ ERROR cannot assign to `a[_]` because it is borrowed
println!("t[0]: {}", t[0]);
t[0];
}
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