{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"if"}]}
                        if let Entry::Vacant(e) = self.result.type_of_rpit.entry(id) {
                    for (id, _) in rpits.impl_traits.iter() {
                            never!("Missed RPIT in `insert_inference_vars_for_rpit`");