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fn main() {
let y = Some(0);
if let Some(x) = y {
x = 2; //~ ERROR cannot assign twice to immutable variable `x`
}
let mut arr = [1, 2, 3];
let [x, ref xs_hold @ ..] = arr;
x = 0; //~ ERROR cannot assign twice to immutable variable `x`
eprintln!("{:?}", arr);
}
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