{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"//"}]}
            // An array, so we might have something like `let [a, b, c] = [0, 1, 2];`.
        let (element_ty, opt_slice_ty, inferred) = match *expected.kind() {
            ty::Array(element_ty, len) => {