{"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
                let actual_prefix = rcvr_ty.prefix_string(self.tcx);
                    bound_list.into_iter().map(|(_, path)| path).collect::<Vec<_>>().join("\n");
                info!("unimplemented_traits.len() == {}", unimplemented_traits.len());