{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"lint.span_label(closure_head_span,"}]}
                                        lint.span_label(closure_head_span, format!("\
                                        let var_name = self.tcx.hir_name(*var_hir_id);
                                        in Rust 2018, this closure implements {missing_trait} \