{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"wf_tys.extend(trait_sig.inputs_and_output.iter());"}]}
    wf_tys.extend(trait_sig.inputs_and_output.iter());
    // not contain the input parameters. See issue #87748.
    let trait_sig = ocx.normalize(&norm_cause, param_env, trait_sig);