test/tint/identifiers/underscore/prefix/upper/let.wgsl

@group(0) @binding(0) var<storage, read_write> s: i32;

@compute @workgroup_size(1)
fn f() {
    let A : i32 = 1;
    let _A : i32 = 2;
    let B = A;
    let _B = _A;

    s = A + _A + B + _B;
}