{"ast_node_type":"variable","tokens":[{"end":79,"kind":"keyword","start":0,"text":"let"}]}
    let discard_all = tcx.sess.coverage_options().discard_all_spans_in_codegen;
    // `-Zcoverage-options=discard-all-spans-in-codegen` to force it to occur.
    let make_coords = |span: Span| {