{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"tcx.infer_ctxt().build_with_typing_env(ccx.typing_env);"}]}
                            tcx.infer_ctxt().build_with_typing_env(ccx.typing_env);
                        let (infcx, param_env) =
                        let obligation =