// MIR for `f` after CopyProp

fn f(_1: usize) -> usize {
    debug a => _1;
    let mut _0: usize;
    let _2: usize;
    let mut _3: usize;
    let mut _4: usize;
    scope 1 {
        debug b => _2;
    }

    bb0: {
        _2 = copy _1;
        _1 = const 5_usize;
        _1 = copy _2;
        StorageLive(_4);
        _4 = copy _1;
        _0 = id::<usize>(move _4) -> [return: bb1, unwind unreachable];
    }

    bb1: {
        StorageDead(_4);
        return;
    }
}