{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"infcx.instantiate_canonical(span,"}]}
                    infcx.instantiate_canonical(span, &query_input.canonical);
                let (ParamEnvAnd { param_env: _, value: self_ty }, canonical_inference_vars) =
                debug!(?self_ty, ?query_input, "probe_op: Mode::Path");