{"ast_node_type":"other","tokens":[{"end":167,"kind":"keyword","start":0,"text":"lint.span_label(cause_span,"}]}
                                    lint.span_label(cause_span, format!("in Rust 2018, this closure captures all of `{}`, but in Rust 2021, it will only capture `{}`",
                                    let cause_span = self.tcx.hir_span(*capture_expr_id);
                                        self.tcx.hir_name(*var_hir_id),