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