rust/tests/ui/consts/const_let_promote.rs

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//@ run-pass
use std::cell::Cell;
const X: Option<Cell<i32>> = None;
const Y: Option<Cell<i32>> = {
let x = None;
x
};
// Ensure that binding the final value of a `const` to a variable does not affect promotion.
#[allow(unused)]
fn main() {
let x: &'static _ = &X;
let y: &'static _ = &Y;
}