test/tint/identifiers/underscore/double/let.wgsl

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

@compute @workgroup_size(1)
fn f() {
    let a = 1;
    let a__ = a;
    let b = a;
    let b__ = a__;

    s = a + a__ + b + b__;
}