{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"if"}]}
                            if !current_edition.at_least_rust_2024() || !span.at_least_rust_2024() {
                        LetChainsPolicy::EditionDependent { current_edition } => {
                                self.parser.dcx().emit_err(errors::LetChainPre2024 { span });